Relevant bibliographies by topics / Recovery study

Academic literature on the topic 'Recovery study'

Author: Grafiati
Published: 9 March 2023
Last updated: 10 March 2023

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Journal articles on the topic "Recovery study"

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Łokietek, Tomasz, Wojciech Tuchowski, Dorota Leciej-Pirczewska, and Anna Głowacka. "Heat Recovery from a Wastewater Treatment Process—Case Study." Energies 16, no. 1 (December 21, 2022): 44. http://dx.doi.org/10.3390/en16010044.

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This article presents the potential of heat recovery from wastewater with an example of a wastewater treatment plant (WWTP) in Mokrawica, which is located in the West Pomeranian region of Poland. A thorough literature review discusses the relevance of the topic and shows examples of heat recovery conducted with heat pumps. Raw and treated wastewater are mostly used as heat sources, with the latter achieving higher thermal capacities. Heat recovery from a biological treatment process is rarely implemented and requires more detailed studies on this subject. The proposed methodology for estimating possible heat recovered from wastewater, requiring heating and cooling capacities, as well as the coefficient of performance (COP) of a heat pump, is based on only three parameters: wastewater volumetric flow, wastewater temperature, and the required temperature for heating or air-conditioning. The heat recovery potential was determined for different parts of WWTP processes, i.e., the sand box, aeration chamber, secondary sedimentation tank, and treated sewage disposal. The average values of 309–451 kW and a minimum of 58–68 kW in winter were determined. The results also indicate that, depending on the location of the heat recovery, it is possible to obtain from wastewater between 57.9 kW and 93.8 kW of heat or transfer to wastewater from 185.9 to 228.2 kW. To improve biological treatment processes in the winter season, wastewater should be preheated with a minimum of 349–356 kW that can be recovered from the treated wastewater. The heat transferred to the wastewater from the air-conditioning system amounts to 138–141 kW. By comparing the required cooling and heating capacities with the available resources, it is possible to fully recover or transfer the heat for central heating, hot water, and air conditioning of the building. Partial preheating of wastewater during the treatment process requires further analysis.
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Liu, Hui, Shi Hua Bi, Xin Jie Yu, Jun Li, Zhen Li, and Pei Zhu Liu. "Study on the Recovery Circuit Based on Multi-Module STRETCH Meat Grinder." Applied Mechanics and Materials 496-500 (January 2014): 1073–78. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.1073.

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Inductive pulse power supplies attract interests since their energy densities are one order of magnitude higher than those of capacitive ones at the same power output capacity. STRETCH meat grinder was put forward by IAT (Institute of Advanced Technology). Energy Recovery circuit was developed to improve the energy efficiency and reduce the energy loss of the whole circuit. The residual energy can be recovered by triggering the related thyristors. Simulation results show that the topology with energy recovery circuit can recover most of the residual energy by triggering thyristors and has potential applications for high energy systems in the future.
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Ku, Elaine, Raymond K. Hsu, Kirsten L. Johansen, Charles E. McCulloch, Mark Mitsnefes, Barbara A. Grimes, and Kathleen D. Liu. "Recovery of kidney function after dialysis initiation in children and adults in the US: A retrospective study of United States Renal Data System data." PLOS Medicine 18, no. 2 (February 19, 2021): e1003546. http://dx.doi.org/10.1371/journal.pmed.1003546.

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Background Little is known about factors associated with recovery of kidney function—and return to dialysis independence—or temporal trends in recovery after starting outpatient dialysis in the United States. Understanding the characteristics of individuals who may have the potential to recover kidney function may promote better recognition of such events. The goal of this study was to determine factors associated with recovery of kidney function in children compared with adults starting dialysis in the US. Methods and findings We determined factors associated with recovery of kidney function—defined as survival and discontinuation of dialysis for ≥90-day period—in children versus adults who started maintenance dialysis between 1996 and 2015 according to the United States Renal Data System (USRDS) followed through 2016 in a retrospective cohort study. We also examined temporal trends in recovery rates over the last 2 decades in this cohort. Among 1,968,253 individuals included for study, the mean age was 62.6 ± 15.8 years, and 44% were female. Overall, 4% of adults (83,302/1,953,881) and 4% of children (547/14,372) starting dialysis in the outpatient setting recovered kidney function within 1 year. Among those who recovered, the median time to recovery was 73 days (interquartile range [IQR] 43–131) in adults and 100 days (IQR 56–189) in children. Accounting for the competing risk of death, children were less likely to recover kidney function compared with adults (sub-hazard ratio [sub-HR] 0.81; 95% CI 0.74–0.89, p-value <0.001; point estimates <1 indicating increased risk for a negative outcome). Non-Hispanic black (NHB) adults were less likely to recover compared with non-Hispanic white (NHW) adults, but these racial differences were not observed in children. Of note, a steady increase in the incidence of recovery of kidney function was noted initially in adults and children between 1996 and 2010, but this trend declined thereafter. The diagnoses associated with the highest recovery rates of recovery were acute tubular necrosis (ATN) and acute interstitial nephritis (AIN) in both adults and children, where 25%–40% of patients recovered kidney function depending on the calendar year of dialysis initiation. Limitations to our study include the potential for residual confounding to be present given the observational nature of our data. Conclusions In this study, we observed that discontinuation of outpatient dialysis due to recovery occurred in 4% of patients with end-stage kidney disease (ESKD) and was more common among those with ATN or AIN as the cause of their kidney disease. While recovery rates rose initially, they declined starting in 2010. Additional studies are needed to understand how to best recognize and promote recovery in patients whose potential to discontinue dialysis is high in the outpatient setting.
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Dessie, Anteneh Mengist, Sefineh Fenta Feleke, Denekew Tenaw Anley, Rahel Mulatie Anteneh, and Zelalem Animut Demissie. "Assessment of Factors Affecting Time to Recovery from COVID-19: A Retrospective Study in Ethiopia." Advances in Public Health 2022 (April 12, 2022): 1–7. http://dx.doi.org/10.1155/2022/7182517.

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Background. The average duration of recovery from COVID-19 and influencing factors, which would help inform optimal control strategies, remain unclear. Moreover, studies regarding this issue are limited in Ethiopia, and no region-wise studies were conducted. Hence, this study aimed to investigate the median recovery time from COVID-19, and its predictors among patients admitted to Amhara regional state COVID-19 treatment centers, Ethiopia. Methods. A facility-based retrospective follow-up study was conducted at Amhara regional state COVID-19 treatment centers from 13 March 2020 through 30 March 2021. Data were entered using EpiData version 3.1, and STATA version 14 was used for analysis. A Kaplan–Meier curve was used to estimate survival time, and the Cox regression model was fitted to identify independent predictors. P value with 95% CI for the hazard ratio was used for testing the significance at alpha 0.05. Results. Six hundred twenty-two cases followed, and 540 observations developed an event at the end of the follow-up. The median time to recovery was 11 days with an interquartile range of 9–14 days. Most of the patients were recovered from COVID-19 between days seven and fourteen. In the first six days of admission, only 4.2% of cases had recovered, but by day 14, 73.8% had recovered. Patients without comorbid illness/s were faster to recover than their counterparts (AHR = 1.44 : 95% CI: 1.10, 1.91) and those who have signs and symptoms on admission (AHR = 0.42 : 95% CI: 0.30, 0.60) and old-aged (AHR = 0.988; 95% CI: 0.982, 0.994) took longer to recover. Conclusion. In conclusion, a relatively short median recovery time was found in this study. Significant predictors for delayed recovery from COVID-19 were older age, presence of symptoms at admission, and having at least one comorbid condition. These factors should be placed under consideration while developing a strategy for quarantining and treating COVID-19 patients.
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Bron, Dominique, Van Hyunh, Virginie Dewilde, Jalil Bennani, Philippe Lewalle, Phuong Huynh, Rita Leroy, et al. "Immunological Recovery after Nonmyeloablative Transplant: A Prospective Study of 24 Patients Treated in a Single Center." Blood 104, no. 11 (November 16, 2004): 5044. http://dx.doi.org/10.1182/blood.v104.11.5044.5044.

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Abstract Background: Nonmyeloablative conditioning regimens are more and more widely used in the setting of stem cell transplant due to a reduced transplant related mortality. However, these conditioning regimens include more immunosuppressive agents and little data in terms of immunological recovery are found in the literature. Population: 24 patients (pts) admitted for nonmyeloablative transplant from HLA identical donors were prospectively followed during a period of 1 year. All pts received a conditioning regimen consisting of rabbit ATG (fresenius), Fludarabine phosphate, Cyclophosphamide ( ARA-C for myeloid malignancies) cyclosporin A and mycophenolate mofetil (MMF). Lymphocytes markers expression as well as lymphocytes absolute numbers were studied to evaluate the cellular immunologic recovery. IgG, IgA and IgM levels were also monitored during one year. Pts were stratified according to the presence of GVHD(acute and chronic) or not. Results: 24 pts with a median age of 52 (20–64) years old transplanted with an attenuated conditioning regimen, were evaluated. Median delay to recover 500 ANC and 20000 plt/ul was 8 days. Without GVHD, the pts recover a normal level of CD3, CD8, CD19,CD56 and CD45RO positive lymphocytes within 6 months. CD4+ and CD45RA + lymphocytes did not reach normal values within 1 year; Therefore the CD4/CD8 ratio remains low for more than 12 months. This observation explains the high incidence of oppotunistic infections in these pts even 6 months after transplantion. In our small seies,with or without GVHD neither IgA, nor IgM recovered within 1 year. IgG recovery is not evaluable because of human IVIG administration monthly after transplant. Conclusion: our small series confirms the rapid hematologic recovery after nonmyeloablative transplant.Cellular immunological recovery without GVHD is achieved within 6 months for most of the lymphocytes subsets excepted the CD4+ lymphocytes who need more than 12 months to recover. IgM and IgA recovery is also very slow.
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Reinders, I. M. A., M. R. D. van de Kar, P. M. A. J. Geomini, J. C. Leemans, J. W. M. Maas, and M. Y. Bongers. "Short-term recovery after NovaSure® endometrial ablation: a prospective cohort study." Facts, Views and Vision in ObGyn 14, no. 4 (December 30, 2022): 299–307. http://dx.doi.org/10.52054/fvvo.14.4.042.

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Background: Endometrial ablation is a frequently performed treatment for heavy menstrual bleeding, but detailed information about recovery to help inform patients is lacking. Objective: To gain more insight into the short-term recovery after NovaSure® endometrial ablation, with the goal of improving preprocedural counselling. Materials and Methods: A total of 61 women who underwent endometrial ablation between March 2019 and November 2021 in a teaching hospital in the Netherlands were included in this prospective cohort study. Main outcome measures: Short-term recovery was investigated through questionnaires in the first week after the procedure. The primary outcome was the Recovery Index (RI-10). Secondary outcomes included health-related quality of life (EQ-5D-5L), pain intensity, use of analgesics, nausea, vaginal discharge, capability of performing activities (domestic chores, sports, work), self-rated health (EQ-VAS) and the feeling of full recovery. Results: A total of 33 women underwent the procedure under local anaesthesia and 28 women under procedural sedation. The RI-10 increased in the first week; median scores on day one, two and seven were 34 (IQR 28.5-41.5), 38.5 (IQR 31-47), and 42 (IQR 37.5-48), respectively. The median time for full recovery was five days. However, 23% of all women were not fully recovered within seven days. Women needed a median time of two days for returning to their work and 5.5 days for sporting activities. There were no differences in recovery between both anaesthesia techniques. Conclusions: Women undergoing endometrial ablation can be informed that most will fully recover within the first week of the procedure and that there is no difference in expected recovery time according to whether the procedure is undertaken with local anaesthesia or conscious sedation. What is new? The short-term recovery after endometrial ablation has been mapped in this trial. This information can be used in counselling women with heavy menstrual bleeding.
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Min, Jihee, Jee Ye Kim, Sujin Yeon, Jiin Ryu, Jin Joo Min, Seho Park, Seung Il Kim, and Justin Y. Jeon. "Change in Shoulder Function in the Early Recovery Phase after Breast Cancer Surgery: A Prospective Observational Study." Journal of Clinical Medicine 10, no. 15 (July 31, 2021): 3416. http://dx.doi.org/10.3390/jcm10153416.

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Breast cancer surgery significantly affects the shoulder’s range of motion (ROM) and strength. However, the extent of shoulder impairment, as well as patterns of recovery immediately after surgery, is not fully understood. Therefore, we aimed to investigate shoulder ROM and strength during the early recovery phase after surgery. Thirty-two breast cancer patients were observed five times: the day before surgery, discharge day (postoperative day 1 (POD1) or (POD2)), first outpatient visit (POD7–10), second outpatient visit (POD14–20), and third outpatient visit (POD21–30). We assessed shoulder passive ROM and strength for both affected and unaffected arms at each observation. ROM decreased in both affected and unaffected sides post-surgery. ROM on the affected side did not recover to the pre-surgery level until the third outpatient visit (POD24). In contrast, the ROM on the unaffected side recovered to the pre-surgery level by the first outpatient visit (POD10). The shoulder strength of both arms declined and did not recover to pre-surgery levels. Shoulder strength in the affected arm significantly decreased immediately after surgery (52.9% of the pre-surgery levels) and did not recover until the third outpatient visit (62.5% of the pre-surgery levels), whereas that in the unaffected arm decreased gradually (83.1 ± 2.3 at POD 1 and 78.9 ± 2.9 at POD 24). Descriptively, patterns of recovery in ROM may vary according to types of surgery while patterns of recovery in shoulder strength did not: shoulder strength significantly decreased and did not recover notably regardless of types of surgery. Both shoulder ROM and strength reduced during the early recovery phase after breast cancer surgery regardless of types of surgery, although the degree of reduction was greater in shoulder strength than ROM. Our findings suggest that rehabilitation exercises should be implemented in both upper limbs.
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Lee, Koo, Sung Bae Cho, Junsin Yi, and Hyo Sik Chang. "Simplified Recovery Process for Resistive Solder Bond (RSB) Hotspots Caused by Poor Soldering of Crystalline Silicon Photovoltaic Modules Using Resin." Energies 15, no. 13 (June 24, 2022): 4623. http://dx.doi.org/10.3390/en15134623.

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When the thickness of the solar cell wafer and the amount of Ag to be used decreases, it is the best method to recover the power of the module after use at a minimum cost and reuse the module itself. Economic recovery technology can be applied to the power degradation, caused by the resistive solder bond (RSB) hotspot by poor soldering, because the recovery process can be simplified compared to the power loss that is often greater than 30%. This study demonstrated a quick recovery of the RSB hotspot with on-site recovery technology applied with resin and verified the performance and long-term reliability of on-site recovery technology, compared to the factory recovery method, where the back sheet is removed and laminated to recover the module. Both the factory and field recovery methods confirmed recovery results closer to the initial rated power output of the samples. Each sample was degraded by the RSB hotspot to ~62–65% of the initial power output, and the recovery process successfully recovered it to ~96–99%. In on-site recovery, verification of the possible EVA solvothermal swelling, which is the effect of organic solvents contained in the resin on EVA, is essential for verifying the long-term reliability of the recovered module. In this study, the power degradations of the on-site recovered samples after a TC 200 cycle test are −2.14% and −0.95%, respectively, which are within the certification test standard of the new manufacturing module. Existing factory recovery costs not only in the recovery process, but also in a total of 22 stages, such as the transfer of the target module. The largest advantage is that the on-site recovery process can be restarted in the field after only eight stages.
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Menon, J. K. R., R. M. Nair, and S. Priyanka. "Unilateral vocal fold paralysis: can laryngoscopy predict recovery? A prospective study." Journal of Laryngology & Otology 128, no. 12 (November 17, 2014): 1095–104. http://dx.doi.org/10.1017/s0022215114002667.

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AbstractObjective:To determine the prognostic value of laryngoscopy in predicting the recovery of unilateral vocal fold paralysis.Method:A prospective study was carried out of all patients with unilateral vocal fold paralysis without a progressive lesion or arytenoid dislocation.Results:Among the 66 candidates, 15 recovered. Patients with interarytenoid paralysis (p < 0.001) or posterolateral tilt of the arytenoid (p = 0.028) had less chance of recovery. Among 51 patients who did not recover, 25.49 per cent regained phonatory function by compensatory movement of the normal side; the rest required an intervention. Intervention requirement was significantly less for those patients who had isolated glottic level compensation. The paralysed vocal fold was at the same level in 32.35 per cent of patients, higher in 38.23 per cent and lower in 29.42 per cent. In those in whom vocal folds were in the abducted position (46.67 per cent), the affected vocal fold was at a lower position on phonation. Inter-observer reliability assessment revealed excellent to good agreement for all criteria.Conclusion:Interarytenoid paralysis and posterolateral tilt of the arytenoid were predictors of poor recovery.
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Sandoval Martinez, Maria Isabel, and Samuel Fernando Muñoz Navarro. "Laboratory study of cyclic liquid solvent injection process for heavy oil recovery through computed tomography." DYNA 86, no. 210 (July 1, 2019): 81–90. http://dx.doi.org/10.15446/dyna.v86n210.74983.

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The cyclic solvents injection has been considered for years as an improved non-thermal enhanced oil recovery method for the recovery of heavy oil, which includes three stages: injection, soaking, and production. This paper describes a laboratory study with Computed Tomography and Nuclear Magnetic Resonance of a cyclic solvent injection process in a porous medium, using naphtha as a liquid diluent to recover a Colombian heavy oil in a porous medium at 84 °C. The core was scanned during the soaking time to determine the expansion behavior of the mixing zone by analyzing the density profiles obtained after each scan. It was also scanned after the production stage to observe the distribution of saturation in the porous medium after each cycle. Finally, the fluids recovered from porous medium were taken to a nuclear magnetic resonance equipment to determine the recovery factor.
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Dissertations / Theses on the topic "Recovery study"

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Rojas, Sigala Mauro. "Study of Launcher Recovery Systems." Thesis, Luleå tekniska universitet, Rymdteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80722.

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The space sector has been evolving due to the fast-technological advancements generating a reduction of manufacturing, cost and size in space missions, where highly capable performing small satellites are becoming the standard in this industry. Furthermore, the high launching cost limits the trend of cost reduction for the space missions, since the small satellites are sent as a second payload. An alternative to reduce this limitation is using reusable launchers which are key in the future of space industry, once they are optimized in efficiency and reliability. Therefore, an opportunity of design is presented, since the increase of small satellites missions requires a reduction of the cost in launch services a suitable option for the future market are the reusable launchers. The problematic of using recovery systems and reuse parts of the vehicle is the increase of weight due to the added systems that the vehicle needs to be recovered. This paper presents different engines and calculate the performance of each engine based on the needs of missions for small satellites. The starting conditions will be that the payload needs to be launched in low circular or elliptical orbits (altitudes of between 300 and 650 km) and the engine has the ability of vertical take-off, vertical landing. The design will also take into account the possibility of reusing parts of the vehicle and the reentry capability. Different combination of engines and fuels are setup in various configurations. For each case the mass analysis will be developed which will allow to calculate the performance for each engine. The important parameters are the number and type of engines, the ratios of the masses, the thrust-to-weight ratio and specific impulse. Once the mass analysis is obtained the following procedure is the selection of the design considering the empty mass. The best combination of characteristics of the engines will be the suitable candidate. Different assistance systems and techniques for the recovery are assessed to obtain a suitable option to improve the efficiency. The expected results are the calculation of the engine performance and how the selected design can be suitable for the space launcher sector for the small satellites. The expected results are a feasible vehicle for small satellites design based in the calculation of the engine parameters together with an efficient launch recovery system. The conclusion is that the space sector can benefit from the design, demonstrating that a launch vehicle with the reusable characteristics
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Yockel, Sharon Lynn. "Service recovery : a case study /." Online version of thesis, 1997. http://hdl.handle.net/1850/12325.

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Goerg, Kristin A. "A Study of fume particle deposition." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/5570.

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Clark, Jonathan. "Heroin Addiction Recovery : A qualitative study on how individuals recovered from habitual heroin addiction." Thesis, Umeå universitet, Institutionen för socialt arbete, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-103754.

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McArthur, L. "Journeys to recovery : clinicians' conceptualisations of recovery in child sexual abuse : a grounded theory study." Thesis, University of Edinburgh, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.657511.

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The experience of child sexual abuse has been associated with emotional and behavioural problems in childhood and mental health problems in later life (Kendall-Tackett et al, 1993). Clinicians may be required to have awareness of multiple theoretical models and approaches to provide the highly individualised interventions required. However, the impact of this upon clinicians has rarely been considered. This study explored clinicians’ conceptualisations of recovery in child sexual abuse and the effect of these upon clinical practice. In-depth interviews were carried out with twelve clinicians working within three child sexual abuse teams and were analysed using a Grounded Theory methodology (Strauss & Corbin, 1998). Through analysis of the interview material two core categories emerged. The first related to the conceptualisation of recovery as an ongoing, individualised, developmental journey. Four distinct phases of this process emerged within this category, including building safety and trust, integration and meaning making, finding worth in the self and others and re-engaging with the world. The second core category related to the factors which influenced clinicians’ conceptualisations. These were concerns about stigma and power, developmental orientation, personal experiences or ethos, therapeutic orientation and systemic influences. Results highlighted considerable concerns about stigma amongst clinicians. These appeared to relate to the unique developmental sensitivity experienced by child and adolescent workers. The complexity of conceptualising recovery processes within childhood was explored and the need for unifying, developmentally sensitive theoretical models and guidelines highlighted.
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Palmer, Francesca T. "Lay constructions of recovery : a Q methodological study." Thesis, University of Surrey, 2015. http://epubs.surrey.ac.uk/808622/.

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Recovery from mental health problems is a key target for the NHS today. The philosophy of personal recovery is included within government policies and the design of some mental health services in the UK. Research into recovery has focused largely on service-users and there is a lack of information about lay perceptions of recovery. This study sought to examine lay constructions of recovery from two mental health problems - depression and psychosis - using Q methodology. Seventy-two participants sorted 47 statements about recovery based upon their level of relative agreement or disagreement with each one after reading a vignette describing either symptoms of depression or of psychosis. Three subtly different constructions emerged from participants in the depression condition and two from those in the psychosis condition. Lay constructions of recovery from each of these conditions overlapped to some extent, with differences emerging around the centrality of professional input and the eradication of symptoms. The study demonstrated that the constructions of lay people in this sample comprised elements of both personal and clinical recovery. Generally, participants seemed to have an optimistic view on the possibility of recovery from both conditions.
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Vestberg, Ola. "Heat recovery from untreated wastewater : A case study of heat recovery from sewerline to district heating network." Thesis, KTH, Energiteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210224.

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High amounts of heat energy are today deposited into the urban wastewater system. The current society-wide development for energy efficiency has so far barely touched upon the area of wastewater heat conservation, which is why the share of total energy consumption from water use is increasing. Through this master thesis a case study was performed, assessing in particular the heat recovery potential from untreated wastewater in the common sewer line upstream from a wastewater treatment plant (Käppalaverket) for supply onto the local district heating network (Norrenergi) by the use of a heat pump solution. The current wastewater treatment process is using temperature dependant biological treatment for denitrifying the wastewater before it is disposed to the Baltic Sea, which poses limitations on upstream heat extraction. The purpose of the study was to assess the heat recovery potential and possibilities when using untreated wastewater compared to what is done traditionally using treated wastewater after the treatment plant. Furthermore a technological review was done over the area of heat recovery from untreated wastewater and also an evaluation of potential equipment and technology suppliers. Hydraulic modelling and thermodynamic simulations of the wastewater system were performed. Results showed that during a majority of the year approximately 4 MW of heat could be extracted while staying within conservative limits in regards to a minimum influent temperature as well as a maximum upstream temperature decrease. During wet season however, no or very limited heat could be recovered as the influent temperatures are already in a rather sensitive range in regards to the biological treatment process. At this level, through analysis of available equipment for heat recovery from untreated wastewater, a maximum heat amount of approximately 18 GWh per year could be supplied to the district heating network. Furthermore, it was found that reducing the amount of supplementary water in the system would be highly beneficial, both regarding HR potential but also for the treatment process in the plant. Also, if extensive HR performed by water consumers would occur, the model shows that this would probably have a negative effect on downstream temperature and the treatment process. Through this study it was concluded that even though the theoretically available heat in the system is very large, the practical heat recovery potential is very limited under current conditions. The strongest reason is the limitation posed by the temperature requirements of the influent wastewater. If also cooling is considered, the heat recovery prospects might be better due to the lower net energy extraction from the wastewater. Regarding the economic feasibility of an installation for heat recovery from untreated wastewater, the assessment made in this project showed that it may actually be comparable to projects using other types of waste heat. The results and conclusions from this study should not be considered as a green light, or as motivation, for performing any upstream heat recovery installations. Such projects must be done in consensus with local authorities and especially the wastewater treatment plant in question. Further analyses in this area is considered essential before exploring it further, such as assessing the transient behaviour of the surrounding rock walls when heat is recovered upstream. The model used in this study also needs confirmation through actual temperature measurements within the system, which do not exist at the moment. Furthermore, a complete life cycle analysis should be carried out for the entire urban water system, which should find an optimal way of where to use and to recover the energy.
Stora mängder värme sköljs idag ner i avloppsnätet. Den pågående samhällsbreda utvecklingen för energieffektivisering har så här långt knappt rört vid området för spillvatten, varför andelen av den totala energikonsumtionen från vattenanvändning ökar. Inom detta examensarbete har en fallstudie genomförts där värmeåtervinning från orenat avloppsvatten längs avloppsnätets samlingsledning uppströms från Käppalaverkets reningsverk har utretts. Detta med hjälp av en värmepump för att förse Norrenergis fjärrvärmenät. Den nuvarande vattenreningsprocessen baseras på temperaturberoende biologisk rening för att denitrifiera spillvattnet innan det släpps ut i Östersjön, vilket sätter begränsningar på uppströms värmeuttag. Studien syftade till att utreda potentialen och möjligheterna för att använda orenat avloppsvatten jämfört med att som traditionellt använda redan renat avloppsvatten efter reningsverket.Därtill utfördes en teknikinventering över området samt en utvärdering av potentiella teknik- och utrustningsleverantörer. Hydraulisk modellering och termodynamiska simuleringar av avloppssystemet utfördes. Resultaten visade att under en majoritet av året så kan ungefär 4 MW värme extraheras från det orenade vattnet inom konservativa gränser i förhållande till tillåten minsta inloppstemperatur till reningsverket samt en maximal uppströms temperatursänkning. Under vintern dock så kan väldigt lite, eller till och med ingen, värme återvinnas på grund av att inloppstemperaturen till reningsverket redanbefinner sig inom ett relativt kritiskt område i förhållande till den biologiska reningsprocessen. På denna nivå så kan uppskattningsvis maximalt 18 GWh per år förses till fjärrvärmenätet. Det fanns också att en reduktion av mängden tillskottsvatten skulle vara väldigt gynnsamt, både för värmeåtervinnings skull men även för själva reningsprocessen. Därtill, om utbredd uppströms värmeåtervinning hos konsumenterna skulle tillåtas, så visar modellen att detta skulle ha en negativ påverkan på nedströms reningsprocess. Genom denna studie dras slutsatsen att trots att den teoretiskt tillgängliga värmen är stor i systemet så är de praktiska möjligheterna väldigt begränsade under nuvarande förhållanden. Den starkaste orsaken till detta är begränsningen som utgörs av temperaturkravet som reningsprocessen har. Om även kyla anses möjligt så ökar även möjligheterna för värmeåtervinning på grund av den lägre netto effekten från värmeåtervinning som sker. Då den ekonomiska genomförbarheten analyserades fanns att en installation med värmeåtervinning från orenat avloppsvatten faktiskt är jämförbar med andra spillvärmeprojekt. Det är viktigt att poängtera att resultat och slutsatser i denna studie inte bör anses som någon form av grönt ljus, eller som motivering, för att genomföra någon sorts uppströms installationer för värmeåtervinning. Projekt av sådan natur bör genomföras i samförstånd med lokala myndigheter, och i förlängningen även med avloppsreningsverket i fråga. Fortsatta analyser inom detta område betraktas som absolut nödvändiga före man exploaterar detta område vidare. Sådana studier är till exempel att analysera det transienta beteendet hos den omgivande bergväggen i avloppsnätet då värme börjar återvinnas uppströms. Modellen i denna studie behöver också vidare bekräftelse genom faktiska temperaturmätningar i avloppssystemet, vilka idag ej existerar. Vidare bör en fullständig livscykelanalys över hela det urbana vattensystemet göras, var man bör finna ett optimerat sätt att använda samt återta energin.
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Hong, Tao. "Fundamental study on tin recovery in acidic aqueous systems." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54952.

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Tin is widely used in solder, tin plating and tin alloys. The current recovery rate of tin metal is low and insufficient with just over 300,000 tonnes annually. The grade of tin concentrates in traditional smelting methods needs to be at least 60%. Otherwise, iron, the chief impurity in tin concentrates can form tin-iron alloys and result in inefficient recovery of tin. Therefore, a hydrometallurgical technology to treat lower grade tin concentrates is proposed to solve the problem and close the demand gap for tin. The electrochemical reduction of chromium(III) solutions was conducted with a graphite felt cathode in acidic aqueous systems (chloride, sulfate and MSA). The parameters of acid concentration, current density, graphite felt thickness, graphite felt surface condition and graphite felt usage frequency were investigated. It was found that acid concentration has a significant influence on chromium(III) reduction in the sulfate and MSA system, while slight effect in the chloride system. In addition, the lifetime of the graphite felt in the sulfate and MSA system was shorter than that in the chloride system. These electrochemical differences may result from the pathway difference in electron transfer between the electrode and the chromium(III) ions. In general, chromium(III) ions in the chloride system showed the best electrochemical reduction activity. The chromium(II) ions synthesized from electrochemical reduction of chromium(III) ions were then used to effect the reduction of SnO₂ powder. The effect of temperature on the recovery test in the chloride, sulfate and MSA system was investigated. It was found that under the conditions of this thesis, the predominant recovery product of SnO₂ is Sn metal, rather than Sn(II). Generally, the recovery kinetics and total conversion were low in the sulfate and MSA system; however, the chloride system showed significantly better recovery results. This may be attributed to the catalysis effect of the chloride ions on the recovery process.
Applied Science, Faculty of
Materials Engineering, Department of
Graduate
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McLaughlin, John Joseph. "Finding the commas, a phenomenological study of reading recovery." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ30003.pdf.

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Nilsson, Karin. "Recovery from adolescent onset anorexia nervosa : a longitudinal study." Doctoral thesis, Umeå : Univ, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1119.

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Books on the topic "Recovery study"

1

Branch, Ontario Waste Management, Kilborn Limited, and Algoma Byproducts Corp, eds. Ammonia recovery feasibility study. [Toronto]: Ontario Environment, 1991.

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Bob, Burns. Recovery from divorce: With study guide. Nashville: Thomas Nelson Publishers, 1992.

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Kack, David. Automated cost recovery: A feasibility study. Helena, Mont: Research Programs, Montana Dept. of Transportation, 2008.

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Authority, Missouri Environmental Improvement and Energy Resources. Statewide resource recovery feasibility and planning study. [Jefferson City]: Environmental Improvement and Energy Resources Authority, State of Missouri Dept. of Natural Resources, 1987.

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Corbett, Keith. Pilot study for sand lizard UK recovery programme. Peterborough: English Nature, 1994.

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Borchard, Therese Johnson. Everyone's problem: Addiction & recovery, participant book. Notre Dame, Ind: Ave Maria Press, 1997.

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Planning, Illinois Dept of Energy and Natural Resources Office of Research and. Chlorofluorocarbons (CFC) recovery and source reduction study: Final report. Springfield, Ill: The Office, 1990.

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U.S. Fish and Wildlife Service. and University of Wyoming. Fish and Wildlife Cooperative Research., eds. Colorado gray wolf recovery: Biological feasibility study : final report. [Denver, Colo.?: The Service, 1994.

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O, Dinardo, ed. Study on metals recovery/recycling from acid mine drainage. Ottawa, Ont: Canada Centre for Mineral and Energy Technology = Centre canadien de la technologie des minéraux et de l'énergie, 1991.

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United States. National Aeronautics and Space Administration., ed. Reusable Reentry Satellite (RRS) summary report: Recovery tradeoff study. Torrance, Calif: Science Applications International Corp., 1990.

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Book chapters on the topic "Recovery study"

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Wray, Josie, Sion Williams, and John Keady. "Diagramming stroke survivorship and recovery." In Participatory Case Study Work, 90–108. Abingdon, Oxon; New York, NY: Routledge, 2021. | Series: Routledge advances in research methods: Routledge, 2020. http://dx.doi.org/10.4324/9780429198410-7.

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Sheikh, Ahmed F. "Change Management and Disaster Recovery." In CompTIA Security+ Certification Study Guide, 87–110. Berkeley, CA: Apress, 2020. http://dx.doi.org/10.1007/978-1-4842-6234-4_6.

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Thiruppugazh, V. "Post-Disaster Reconstruction and Institutional Mechanisms for Risk Reduction: A Comparative Study of Three Disasters in India." In Disaster Recovery, 17–39. Tokyo: Springer Japan, 2013. http://dx.doi.org/10.1007/978-4-431-54255-1_2.

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Cavanagh, Stephen J. "Care Study: Recovery from a Stroke." In Orem’s Model in Action, 39–56. London: Macmillan Education UK, 1991. http://dx.doi.org/10.1007/978-1-349-11909-7_3.

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Nakagawa, H., and J. Ohta. "Phosphorus Recovery from Sewage Sludge Ash: A Case Study in Gifu, Japan." In Phosphorus Recovery and Recycling, 149–55. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8031-9_9.

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Sharma, S., K. Pradeepkumar, M. Shaanmaadhuran, M. J. Rajadurai, Y. Anto Anbarasu, and V. Kirubakaran. "Bio- and Thermochemical Conversion of Poultry Litter: A Comparative Study." In Energy Recovery Processes from Wastes, 201–11. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9228-4_17.

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Kumar, Awinash, Santosh Kumar Dash, Moiching Sajit Ahamed, and Pradip Lingfa. "Study on Conversion Techniques of Alternative Fuels from Waste Plastics." In Energy Recovery Processes from Wastes, 213–24. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9228-4_18.

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Eixelsberger, Wolfgang, Manfred Kalan, Michaela Ogris, Håkon Beckman, Berndt Bellay, and Harald Gall. "Recovery of Architectural Structure: A Case Study." In Lecture Notes in Computer Science, 89–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/3-540-68383-6_14.

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Lange, E. A. "A Comparative Study of Xanthans by Light Scattering." In Water-Soluble Polymers for Petroleum Recovery, 231–41. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4757-1985-7_15.

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Moissis, D. E., C. A. Miller, and M. F. Wheeler. "A Parametric Study of Viscous Fingering in Miscible Displacement by Numerical Simulation." In Numerical Simulation in Oil Recovery, 227–47. New York, NY: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4684-6352-1_15.

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Conference papers on the topic "Recovery study"

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Wang, Yongtian, Yue Liu, and Bochao Zou Yi Huang. "Study on Issues of Visual Fatigue of Display Devices." In Signal Recovery and Synthesis. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/srs.2014.sm3f.3.

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Song, Zongjun, and Shenghua Jia. "Study on Service Recovery Satisfaction." In 2009 First International Conference on Information Science and Engineering. IEEE, 2009. http://dx.doi.org/10.1109/icise.2009.1131.

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Marsh, Carl A. "Generator Recovery Project Case Study." In ASME 2004 Power Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/power2004-52017.

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The Generator Recovery Project Case Study is a technical paper that will discuss a project which started with a simple open, clean, and close of a 40MW air cooled generator and turned out to be much more. The unit experienced a gradual increase in winding temperatures over the last several years, with a more notable increase in phase B temperatures. In the history of the unit, it was observed that the unit became contaminated with carbonaceous deposits due to the environment in which it operated. Routine cleanings during scheduled outages were successful in lowering the increased temperature trends. With today’s market environment and an increasing commonality of extending outage intervals, the routine outage interval had been extended to 7 years from the previous outage. The scope of work was to remove the rotor, clean, inspect, test and return the unit to service in just over one week’s time. The requirements of the project were that the efforts be maximized so that the unit returned to service in the most economical means while adhering to practices that would maximize the unit’s availability and reliability. With findings of significant contamination of carbonaceous deposits and significant foreign object damage (FOD), the project lead to overwhelming questions and concerns. The case study will discuss the immediate concerns of the unknown, such as if the core was even recoverable and what was the source of FOD. The case study will walk through the questions raised and the actions taken to first assess the condition of the unit and what actions to be taken to recover the core damage, if at all possible. Most importantly, determining the source of FOD and the rectifications to eliminate future sources of FOD from this area. Detailed information on repair assessments and validation will be presented and procedures for repair and recovery will be discussed. Final testing and validation to return to service will be discussed and the operational characteristics after the repair will be revealed.
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Huang, L., P. Yang, and T. Qin. "A Study of Caustic Consumption by Clays." In SPE Enhanced Oil Recovery Symposium. Society of Petroleum Engineers, 1986. http://dx.doi.org/10.2118/14945-ms.

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Shojaei, Hasan, Reza Rastegar Moghadam, and Kristian Jessen. "Experimental and Modeling Study of Multicontact Miscible Displacements." In SPE Improved Oil Recovery Symposium. Society of Petroleum Engineers, 2012. http://dx.doi.org/10.2118/154307-ms.

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Hou, Binchi, Hongliang Liu, Huiyuan Bian, Chengrong Wang, Ronghua Xie, and Kewen Li. "Experimental Study on Calculating Capillary Pressure from Resistivity." In SPE Improved Oil Recovery Conference. Society of Petroleum Engineers, 2016. http://dx.doi.org/10.2118/179529-ms.

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Nilsson, S., A. Stavland, and H. C. Jonsbraten. "Mechanistic Study of Disproportionate Permeability Reduction." In SPE/DOE Improved Oil Recovery Symposium. Society of Petroleum Engineers, 1998. http://dx.doi.org/10.2118/39635-ms.

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Lantz, M., and G. Muniz. "Conformance Improvement Using Polymer Gels: A Case Study Approach." In SPE Improved Oil Recovery Symposium. Society of Petroleum Engineers, 2014. http://dx.doi.org/10.2118/169072-ms.

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McInnis, Lee E., Kate D. Hunter, Tyler T. Ellis-Toddington, and David J. Grawbarger. "Case Study of the Taber Mannville B ASP Flood." In SPE Enhanced Oil Recovery Conference. Society of Petroleum Engineers, 2013. http://dx.doi.org/10.2118/165264-ms.

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Coskuner, Yakup Berk, Elio Dean, Xiaolong Yin, and Erdal Ozkan. "Water Alternating Alkane Injection: A Molecular Dynamics Simulation Study." In SPE Improved Oil Recovery Conference. SPE, 2022. http://dx.doi.org/10.2118/209363-ms.

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Abstract In a recent study, we observed that the diffusion coefficient of common hydrocarbons in crude oils are more affected by the presence of different hydrocarbon components than the effect of confinement. Based on our previous observations, in this study, we investigated the efficiency of smaller-chain alkane injection into oil-soaked sandstone pores to dilute the oil with alkane. We used molecular dynamics simulations of C2, C3, C4 and C5 as well as a mixture of C3 and C4 to rank the effects of different alkanes on the diffusion and distribution of oil molecules in pore. As water-alternating-alkane injection would bring water into the pores, our simulations included water. Our results indicate that alkane injection into sandstone reservoirs has a significant potential due to the fact that it effectively dilutes the oil. Water always wets quartz surface relative to the oils. Injection of water therefore should be effective in detaching oil molecules on the surface. Presence of water layers did not affect the diffusion coefficients of oil molecules.
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Reports on the topic "Recovery study"

1

White, Steven. Livingston Parish Landfill Methane Recovery Project (Feasibility Study). Office of Scientific and Technical Information (OSTI), November 2012. http://dx.doi.org/10.2172/1136536.

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Ling, Kegang, Zhengwen Zeng, Jun He, Peng Pei, Xuejun Zhou, Hong Liu, Luke Huang, et al. Geomechanical Study of Bakken Formation for Improved Oil Recovery. Office of Scientific and Technical Information (OSTI), December 2013. http://dx.doi.org/10.2172/1155006.

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Sethl, V. K., R. M. Satchwell, and L. A. Jr Johnson. Surface process study for oil recovery using a thermal extraction process. Office of Scientific and Technical Information (OSTI), June 1994. http://dx.doi.org/10.2172/10189645.

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Hendricks, Terry, and William T. Choate. Engineering Scoping Study of Thermoelectric Generator Systems for Industrial Waste Heat Recovery. Office of Scientific and Technical Information (OSTI), November 2006. http://dx.doi.org/10.2172/1218711.

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Dunand, D. C., D. Mari, M. A. M. Bourke, and J. A. Goldstone. Neutron diffraction study of NiTi during compressive deformation and after shape-memory recovery. Office of Scientific and Technical Information (OSTI), September 1995. http://dx.doi.org/10.2172/100006.

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Olsen, D. K., and W. I. Johnson. Feasibility study of heavy oil recovery in the Midcontinent region (Kansas, Missouri, Oklahoma). Office of Scientific and Technical Information (OSTI), August 1993. http://dx.doi.org/10.2172/10182361.

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Veranth, John M., and Gautham Krishnamoorthy. OXYGEN-ENRICHED COAL COMBUSTION WITH CARBON DIOXIDE RECYCLE AND RECOVERY: SIMULATION AND EXPERIMENTAL STUDY. Office of Scientific and Technical Information (OSTI), January 2002. http://dx.doi.org/10.2172/792065.

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Olsen, D. K., and W. I. Johnson. Feasibility study of heavy oil recovery in the Permian Basin (Texas and New Mexico). Office of Scientific and Technical Information (OSTI), May 1993. http://dx.doi.org/10.2172/10154499.

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Veranth, John M., and Gautham Krishnamoorthy. OXYGEN-ENRICHED COAL COMBUSTION WITH CARBON DIOXIDE RECYCLE AND RECOVERY: SIMULATION AND EXPERIMENTAL STUDY. Office of Scientific and Technical Information (OSTI), April 2001. http://dx.doi.org/10.2172/799766.

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Veranth, John M., and Gautham Krishnamoorthy. OXYGEN-ENRICHED COAL COMBUSTION WITH CARBON DIOXIDE RECYCLE AND RECOVERY: SIMULATION AND EXPERIMENTAL STUDY. Office of Scientific and Technical Information (OSTI), February 2002. http://dx.doi.org/10.2172/801214.

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