Bibliografías temáticas / Tannery effluents

Literatura académica sobre el tema "Tannery effluents"

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Publicado: 18 de mayo de 2024

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Artículos de revistas sobre el tema "Tannery effluents"

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Raj, Abhay, Sharad Kumar, Izharul Haq y Mahadeo Kumar. "Detection of Tannery Effluents Induced DNA Damage in Mung Bean by Use of Random Amplified Polymorphic DNA Markers". ISRN Biotechnology 2014 (11 de marzo de 2014): 1–8. http://dx.doi.org/10.1155/2014/727623.

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Common effluent treatment plant (CETP) is employed for treatment of tannery effluent. However, the performance of CETP for reducing the genotoxic substances from the raw effluent is not known. In this study, phytotoxic and genotoxic effects of tannery effluents were investigated in mung bean (Vigna radiata (L.) Wilczek). For this purpose, untreated and treated tannery effluents were collected from CETP Unnao (UP), India. Seeds of mung bean were grown in soil irrigated with various concentrations of tannery effluents (0, 25, 50, 75, and 100%) for 15 days. Inhibition of seed germination was 90% by 25% untreated effluent and 75% treated effluent, compared to the control. Plant growth was inhibited by 51% and 41% when irrigated with untreated and treated effluents at 25% concentration. RAPD technique was used to evaluate the genotoxic effect of tannery effluents (untreated and treated) irrigation on the mung bean. The RAPD profiles obtained showed that both untreated and treated were having genotoxic effects on mung bean plants. This was discernible with appearance/disappearance of bands in the treatments compared with control plants. A total of 87 RAPD bands were obtained using eight primers and 42 (48%) of these showed polymorphism. Irrigating plants with untreated effluent caused 12 new bands to appear and 18 to disappear. Treated effluent caused 8 new bands and the loss of 15 bands. The genetic distances shown on the dendrogram revealed that control plants and those irrigated with treated effluent were clustered in one group (joined at distance of 0.28), whereas those irrigated with untreated effluent were separated in another cluster at larger distance (joined at distance of 0.42). This indicates that treated effluent is less genotoxic than the untreated. Nei’s genetic similarity indices calculated between the treatments and the control plants showed that the control and the plants irrigated with treated tannery effluent had a similarity index of 0.75, the control and plants irrigated with untreated 0.65, and between the treatments 0.68. We conclude that both untreated and treated effluents contain genotoxic substances that caused DNA damage to mung beans. CETP Unnao removes some, but not all, genotoxic substances from tannery effluent. Consequently, use of both untreated and treated wastewater for irrigation poses health hazard to human and the environment.
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Gupta, Poonam, Monika Asthana, Avnish Kumar y Siddhartha Barun. "Physicochemical Analysis and Microbial Diversity of Yamuna Water and Industrial Effluents". International Journal of Applied Sciences and Biotechnology 2, n.º 2 (25 de junio de 2014): 199–205. http://dx.doi.org/10.3126/ijasbt.v2i2.10352.

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Pollution has arisen as a serious environmental concern to the present world after industrialization of human societies. It has severely affected our air, soil and water sources. Looking to its global, national, regional and local dimensions, it is now imperative to check it at each and every level. In the present study, 8 samples (3 Yamuna water samples, 3 tannery effluent samples and 2 textile effluent samples), were collected from different sites of Yamuna and exit points of textile and tannery Industries. Water and effluent samples were analysed for various physicochemical parameters (pH, TDS, hardness, chloride and BOD) using conventional methods. Afterwards these samples were utilized for isolation of the native bacterial species. All the samples were showing higher than the standard values for TDS (500mg/l), hardness (80-100 mg/l), chloride (250mg/l) and BOD (30mg/l). It was observed that the tannery effluents were showing maximum TDS values(1190-1240mg/l), followed by textile effluents (1190 and 1210mg/l) and Yamuna water (530-1180mg/l).Similarly, in case of chloride content, highest concentration range(828.8-1598mg/l)was shown by tannery effluents. pH value was nearly neutral for Yamuna water, slightly acidic in case of textile effluents and more acidic for tannery samples. Highest range of hardness values were observed for the tannery effluents (860-880mg/l) followed by textile effluents (760 and 860mg/l). The BOD values were nearly similar for all the samples with maximum values being observed for tannery effluents (42-48 mg/l). Thus it can be inferred that all the samples were highly polluted and need to be treated by suitable methods. There were 11 cultures purified, that could be employed in bioremediation purposes.DOI: http://dx.doi.org/10.3126/ijasbt.v2i2.10352Int J Appl Sci Biotechnol, Vol. 2(2): 199-205
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Kohli, Richa y Piyush Malaviya. "Impact of tannery effluent on germination of various varieties of wheat (Triticum aestivum L.)". Journal of Applied and Natural Science 5, n.º 2 (1 de diciembre de 2013): 302–5. http://dx.doi.org/10.31018/jans.v5i2.321.

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The present study has been focused on the impact of tannery effluent on germination pattern of ten varieties of wheat (Triticum aestivum).The physico-chemical analysis of the tannery effluents showed that it had high salinity (45.97 ppt) and an acidic pH (3.61). For screening test, a setup with various concentrations of tannery effluent (4.5%, 9%, 13.5%and 18%) was prepared in petri plates to check the impact of tannery effluent on various varieties of wheat. Among ten varieties, PBW-343 and HS-365 showed better performance at 4.5% tannery effluentand considered to be more tolerant, whereas HS -295 was the most sensitive to tannery effluent treatment.
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Rahman, Hafizur, Nabila Hoque, Palash Kumar Sarker y Ashrafus Safa. "Assessment of Hexavalent Chromium Pollution in Buriganga and Dhaleshwari River Waterbodies Adjacent to Tannery Estates in Bangladesh". MIST INTERNATIONAL JOURNAL OF SCIENCE AND TECHNOLOGY 8 (21 de julio de 2020): 11–15. http://dx.doi.org/10.47981/j.mijst.08(01)2020.160(11-15).

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Recently, in Bangladesh, all tannery industries have been relocated to a new location exclusively established for leather processing industries with modern manufacturing facilities and effluent treatment plants with standard probations. Effluents generated from the tannery industries are now being disposed of into the surrounding river water bodies. In this study, our goal was to investigate the presence of chemical contaminants like hexavalent chromium (Cr6+) in the water bodies surrounding tannery industries and to understand the possible role played by the tannery effluents in contaminating the river water bodies with Cr6+. Result analysis revealed the presence of an amount of Cr6+ (ranging from 0.01 mg/L to 3.54 mg/L) in the surrounding water bodies, which was far above the maximum permissible limit of Cr6+ (0.05 mg/L for surface water), set by the Environmental Protection Agency. It is, therefore, plausible to assume that effluents from the tanneries play an important role in hexavalent chromium contamination of water bodies surrounding tannery industries.
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Mottalib, Md Abdul, Tasmima Khan y Md Nurul Abser. "A simple effective treatment of tannery effluents". Journal of Bangladesh Academy of Sciences 38, n.º 2 (28 de diciembre de 2014): 235–39. http://dx.doi.org/10.3329/jbas.v38i2.21348.

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Tannery effluents are one of the major sources of environmental pollution with various toxic parameters and the effluent generated during liming and pickling operations of leather processing are even more dangerous due to their high and low pH range, respectively. In the present work, liming and pickling streams generated during the production of chrome tanned cow hide shoe upper was treated at different ratios and optimized the pH range 6.5 - 7.5. The effluents were mixed at different ratios without adding any foreign chemicals and obtained the results 88% reduction of COD, 94% reduction of BOD and 97% removal of total solids. DOI: http://dx.doi.org/10.3329/jbas.v38i2.21348 Journal of Bangladesh Academy of Sciences, Vol. 38, No. 2, 235-239, 2014
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Ashraf, Sobia, Muhammad Naveed, Muhammad Afzal, Mahmoud F. Seleiman, Nasser A. Al-Suhaibani, Zahir A. Zahir, Adnan Mustafa et al. "Unveiling the Potential of Novel Macrophytes for the Treatment of Tannery Effluent in Vertical Flow Pilot Constructed Wetlands". Water 12, n.º 2 (15 de febrero de 2020): 549. http://dx.doi.org/10.3390/w12020549.

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The phytoremediation potential of macrophytic species has made them an inevitable component of constructed wetlands (CWs) for the treatment of industrial effluents. The macrophytes must have tolerance for the harsh conditions imposed by effluents for an effective establishment of the CW system. In this context, the basic purpose of this work was to investigate the efficacy of five indigenous emergent macrophytes (Brachiaria mutica, Canna indica, Cyperus laevigatus, Leptochloa fusca, and Typha domingensis) for the remediation of tannery effluent in vertical subsurface flow CWs. The ability of each macrophytic species to tolerate pollution load and to remove pollutants from the effluent was assessed. The effect of tannery effluent on the survival and growth of macrophytes was also studied. The treated tannery effluent samples were analyzed for electrical conductivity (EC), pH, biochemical oxygen demand (BOD5), chemical oxygen demand (COD), total dissolved solids (TDS), total suspended solids (TSS), chlorides (Cl−), sulphates (SO42−), oil and grease, and Cr levels. All of the studied macrophytes significantly decreased the pollution load of tannery effluent, and the higher nutrient content of effluent stimulated their growth without any signs of negative health effects. Leptochloa fusca and T. domingensis performed better in removing pollutants and showed higher growth rates and biomass than other tested macrophytes and can be considered preferred species for use in CWs treating tannery effluent. Brachiaria mutica showed morphologically better results than C. indica and C. laevigatus.
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Ahmed, Fitsum Etefa, Awoke Fenta Wodag, Gemeda Gebino Gelebo y Belay Meles Gebre. "Ethiopian Water Hyacinth Leaf Extract as a Potential Tannery Effluent Treatment Material". Journal of Engineering 2022 (23 de abril de 2022): 1–10. http://dx.doi.org/10.1155/2022/8783255.

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Industrial effluents have a serious problem on our ecosystem. Tannery effluent contains a huge amount of pollutant compounds such as toxic substances which need to be treated using either synthetic or natural products. The present study focussed on the treatment of tannery effluents using water hyacinth plant leaf extract. Though some researchers have tried to use this extract for the same, the researchers have experimented only to treat that of Cr3+ and there are a bit of difference in the methodology they followed. In addition, the scope of this research was wider. In this study, fresh raw WH leaves were collected from around Lake Tana, Ethiopia, cleaned and made to powder and then extraction was performed using different solvents. The solvent effects were examined using the ANOVA test. The tannery wastewater was treated with the extracts and parts of the effluents were kept as a control for comparison. Treated and untreated tannery effluents were compared using standard methods such as SLC 22, SLC 8, APHA 2540C, APHA 2540D, and Hack LCK 139 to determine Cr6+, Cr3+, TDS, TSS, and TKN, respectively. The highest amount of Cr6+, Cr3+, and TKN were removed at 30% water hyacinth leaves extracted by distilled water solvent and that of the least was found at hyacinth leaves extract by ethanol solvent but by acetone in BOD and COD treatment. In addition, though it was out of the permissible limit, by using the same amount of the material extracted by distilled water solvent some amounts of BOD and TDS were removed from the wastes compared to that of untreated tannery effluents. Generally, water hyacinth leaf extract is found effective material for the treatment of tannery effluents and can be used in the sector industries. Future studies may be required for setting the most optimum extract concentration for better results.
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A. M. Saeed, Adel, Nasser M. N. Masood y Ali N. A. Al-Kumi. "Estimation of Some Physico-Chemical Parameters of Tannery Effluents to Surrounding Environment (A Yemeni Case Study)". Academic Journal of Research and Scientific Publishing 3, n.º 30 (5 de octubre de 2021): 96–110. http://dx.doi.org/10.52132/ajrsp.e.2021.306.

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Water pollution caused by leather industrial effluent discharges has become a troublesome phenomenon due to its negative impact on environmental health and safety. In this paper, the wastewater in the vicinity of Lawdar tannery areas was assessed in two years from October 2019 to June 2021 to determine physico-chemical parameters of industrial effluents of Lawdar tannery at four different area points. Tannery effluents were collected and all samples were analyzed in the laboratory and rated as no freshwater with parameters such as acidity and basicity, temperature, electrical conductivity, total dissolved solids, total suspended solids, chemical oxygen demand, biological oxygen demand, color, turbidity, hardness, alkalinity, and several positive and negative ions. The investigation showed that all physico-chemical parameters were higher than the standard disposal limits of discharged water quality. The findings of this research will assist the government and tanneries in the treatment of wastewater before discharging to the environment and monitoring the dump sites with regards to disposal arrangement of the tannery effluents and environmental assessment.
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Nabila, T. I. y S. Ibrahim. "Physico-chemical properties of tannery effluents from Challawa industrial area in Kano and evaluation of bioremediation potentials of Spirogyra porticalis and Chlorella vulgaris on the effluents". Bayero Journal of Pure and Applied Sciences 12, n.º 1 (15 de abril de 2020): 156–61. http://dx.doi.org/10.4314/bajopas.v12i1.26s.

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Discharge of industrial effluent in aquatic environment is a serious threat to life due to toxic heavy metals. Algae can be used as cheap bioremediation agents in comparison to conventional technologies. The present study was conducted to evaluate the bioremediation potential of two algal species (Spirogyra porticalis and Chlorella vulgaris) for the removal of Lead from two tannery industries (M Tannery and G Tannery), located in Challawa Industrial Area. Temperature, EC, TDS, DO and BOD were measured. In G Tannery, Spirogyra porticalis had the highest affinity for Lead which was 51%, 55% and 51% at 3, 6 and 9 weeks interval respectively while Chlorella vulgaris affinity for Lead was 40% 45% and 45%. In M tannery, Chlorella vulgaris had the highest potential to remove Lead from the effluent, which was 90%, 86% an 90% while Spirogyra porticalis affinity for Lead was 10%, 41% and 10%. Temperature ranged from 30-31˚C which might be as a result of ambient temperature. The pH of both tannery effluents did not differ significantly (p=<0.5) and it was not within the maximum permissible limit of 6.5-8.5. EC of M Tannery was a little higher than that of G Tannery (8.417±0.26, 6.920±0.050) which were below the permissible limit. TDS of M tannery was higher than that of G Tannery 1919.0±68.46mg/L, 1916.0±61.94mg/l which were not within the permissible limit. DO content were within the permissible limits of 6.4mg/L. BOD of both effluent samples were below the permissible limit of 4mg/L. This research shows that both species are suitable for bioremediation and are also tannery specific. Keywords: Bioremediation, Effluent, Tannery, Spirogyra porticalis, Chlorella vulgaris
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Ramees Raja Hussain A y Aneez Mohamed M. "A study on the physico-chemical characteristics of Tannery Waste Water at Tiruchirappalli district". International Journal of Research in Pharmaceutical Sciences 10, n.º 3 (16 de julio de 2019): 2417–25. http://dx.doi.org/10.26452/ijrps.v10i3.1489.

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The waste water generated by the tanning industry are the potential sources of pollution in Tiruchirappalli district. The tannery effluent can cause serious impact to water and soil. This study evaluates the physico-chemical characteristics of tannery effluent and soil. The chemical and physical parameters and water quality index of tannery wastewater were observed to be toxic as it contains large values of organic and inorganic chemical elements. The tannery effluent contains large values of TDS, EC, anions and cations. The major pollutants in tannery effluents are high chlorides, sulphide and total dissolved solids (TDS). The organic impurities in tannery wastewater are the cause for its bad odour. Tannery wastewater polluted soil was analysed and found to have high values of PH, ESP(Exchangeable sodium percentage), EC, sodium, chloride, sodium adsorption ratio, micronutrients and macronutrients and low values of organic matter, moisture content, phosphorus, potassium, nitrogen, than the garden soil Unpolluted soil.
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Tesis sobre el tema "Tannery effluents"

1

Halder, Aparna. "Identification and studies on microbes found in tannery effluents". Thesis, University of North Bengal, 2006. http://ir.nbu.ac.in/handle/123456789/1396.

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Glaum, Deanne Melanie. "A process for the detanning of chrome leather wastes utilising tannery effluents". Thesis, Rhodes University, 1994. http://hdl.handle.net/10962/d1004089.

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The considerable volume of chromium-bearing wastes generated during the process of leather tanning, exacerbated by the potential for trivalent chromium in the wastes to be oxidised to the toxic hexavalent state, has created a major waste disposal dilemma for the tanning industry. While methods are available for the safe and effective treatment of residual chrome-tanning liquors, little has been done to address the issue of the chrome-bearing solid wastes. Given the increasingly stringent environmental compliance standards facing tanneries, unless an appropriate treatment process is developed in the immediate future, the continued use of chromium as a tanning agent could be compromised. Recent investigations have demonstrated the potential of heated alkaline conditions for dechroming these solid wastes. This study expanded upon these considerations and examined the feasibility of utilising the highly alkaline tannery waste effluents as cost-effective, substitute alkaline media. The three effluents considered in this study, classed as lime sulphide liquors, were shown to be capable of dechroming wet blue shavings, with resultant separation of the solid wastes into a protein and a concentrated chromium product. The solubilised protein product contained low chromium concentrations which comply with legal discharge limits. The precipitated chromium product offers opportunity for reutilisation in the tannery. A novel industrial-scale treatment process, based on these investigations, indicated the process to be capable of treating the quantity of shavings produced on a daily basis by a medium to large scale tannery. Application of this method for the dechroming of other chrome-tanned solid wastes was also shown to be feasible.
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Laubscher, Richard Keith. "The culture of Dunaliella salina and the production of β-carotene in tannery effluents". Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1004116.

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The problems of waste disposal in the tanning industry are unique in that the effluents are highly saline, have a high organic loading and contain heavy metals. Methods are available for the safe treatment and disposal of the latter two components, but the saline component requires the expensive outlay of evaporation ponds. This study has identified a possible use for the saline effluents, turning a problematic waste product into a potentially valuable by-product. A range of tannery effluents were identified and tested for their suitability for the mass cultivation of Dunaliella salina (bardawil strain). The bardawil strain was preferred over a local isolate because of its higher production of β-carotene. Ponded tannery effluents and combined processes effluent proved unsuitable for realistic propagation of the alga. Anaerobic digestion of combined processes effluent did not improve its suitability significantly. Anaerobic digestion of hide-soak effluent may remove persistent antimicrobial agents which influence algal growth, but its contribution to enhancing algal growth is equivocal. Undigested hide-soak effluent lacking in persistent antimicrobial agents was found to be an ideal culture medium, as no additional nutrients needed to be added. Significantly higher biomass was obtained in this effluent compared to chemically defined media. Induction of β-carotene was achieved in nitrogen-deficient defined media after culture in tannery effluent. This suggests that a two-stage system using hide-soak effluent for cell propagation and nitrogen deficient media for β-carotene induction, could be possible for the mass cultivation of D. salina for β-carotene production.
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Robertsson, Jonas y Camilla Andersson. "Characterisation and removal of heavy metals in tannery effluents through the use of local materials". Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-239005.

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Chromium and other heavy metals are known to cause issues related to human and environmental health when they occur in high concentrations in ecosystems. Chromium poses a particularly large threat if it occurs in its hexavalent form, Cr(VI), as it is highly reactive and carcinogenic. The aim of this project was to investigate the wastewater emitted from a tannery in Liwonde, Malawi, with respect to the metals Cr, Al, Cd, Cu, Fe, Mn, Pb and Zn, and to reduce the concentrations using locally available materials. A particular emphasis was put on chromium.   Wastewater collected from the tannery was analysed to determine the total and dissolved concentrations of the metals using a Microwave Plasma-Atomic Emission Spectrometer (MP-AES). The wastewater was then mixed with various dosages of peeled and unpeeled Moringa Oleifera seed powder as well as pure Moringa Oleifera shell powder and sand collected from river Shire. Thereafter, the remaining concentrations of metals were analysed. Additional analyses of various contact times were performed for the removal agent that had shown the best results.     The analyses showed a total chromium concentration of 2.25 ppm and a dissolved chromium concentration of 0.251 ppm in the wastewater discharged from the tannery. Both concentrations were lower than what had initially been expected but still above both the WHO guideline value for chromium in drinking water and the Swedish threshold value for chromium in industrial wastewater (0.05 ppm). No other metals were found in concentrations above trace levels. All of the investigated removal agents, except for pure shell powder, showed positive results for chromium removal. The highest removal observed for dissolved chromium was 72 % and occurred with a removal agent mixture of 5.0 g of river sand and 2.0 g of unpeeled Moringa Oleifera seed powder to 100 mL of wastewater. The reduction of total chromium was 97 % for the same removal agent mixture. However, lower dosages of the removal agents also gave a chromium removal of similar size. Due to resource limitations, no analysis of whether the wastewater contained Cr(III) and Cr(VI) could be performed.   Considering the low initial concentrations of metals emitted from the tannery, there is no urgent need for further treatment of the wastewater. This study has however substantiated the theory that Moringa Oleifera seeds can be used as a low-cost chromium remediation agent in wastewater, a result that can be of use to improve the water quality in other industries and applications.
Det har länge varit känt att krom och andra tungmetaller kan orsaka hälso- och miljöproblem när de förekommer i höga koncentrationer i ekosystem. Krom utgör ett särskilt stort hot om det förekommer i sin sexvärda form, Cr(VI), eftersom det är mycket reaktivt och cancerogent. Syftet med detta projekt var att undersöka avloppsvattnet från ett garveri i Liwonde, Malawi, med avseende på metallerna Cr, Al, Cd, Cu, Fe, Mn, Pb och Zn, samt att minska koncentrationerna med hjälp av lokalt tillgängliga material. En särskilt tonvikt lades på krom.   Avloppsvatten som inhämtats från garveriet analyserades med hjälp av en mikrovågsplasma-atomemissionsspektrometer (MP-AES) för bestämning av total samt löst koncentration av metallerna. Avloppsvattnet blandades sedan med olika doser av pulver från skalade och oskalade Moringa Oleifera-frön, liksom med pulver från skal av Moringa Oleifera-frön och sand från Shire-floden. Därefter analyserades proverna med avseende på återstående metallkoncentrationer. Ytterligare undersökningar genomfördes med olika kontakttider för det inbindningsmedel som visat bäst resultat.   Analyserna visade en total kromkoncentration på 2,25 ppm och en löst kromkoncentration på 0,251 ppm i det avloppsvatten som släpptes ut från garveriet. Båda koncentrationerna var lägre än vad som ursprungligen hade förväntats, men ändå över både WHOs riktlinjer för krom i dricksvatten och det svenska gränsvärdet för krom i industriellt avloppsvatten (0,05 ppm). Inga andra metaller påvisades i betydande koncentrationer. Alla undersökta inbindningsmedel, med undantag av Moringa Oleifera-skal, visade positiva resultat för kromrening. Den största observerade reningen för löst krom var  72 %, och uppmättes för en blandning av 5,0 g sand och 2,0 g pulver av oskalade Moringa Oleifera-frön till 100 mL avloppsvatten. Reduktionen av totalt krom var 97 % för samma blandning. Även lägre doser gav dock en nästan lika hög reningsgrad. På grund av resursbegränsningar kunde ingen analys av huruvida avloppsvattnet innehöll Cr(III) eller Cr(VI) genomföras.   Då avloppsvattnet från garveriet endast innehöll låga koncentrationer av metaller finns inget akut behov av ytterligare rening. Denna studie har dock styrkt tesen att Moringa Oleifera-frön kan användas som ett lågkostnadsalternativ för rening av krom i avloppsvatten. Detta resultat kan vara användbart för att förbättra vattenkvaliteten vid andra industrier och tillämpningar.
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5

Zongo, Inoussa. "Étude expérimentale et théorique du procédé d'électrocoagulation : application au traitement de deux effluents textiles et d'un effluent simulé de tannerie". Thesis, Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL066N/document.

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L’électrocoagulation est une technique de traitement des eaux usées basée sur la dissolution d’anode sacrificielle de fer ou d’aluminium. Ces métaux se dissolvent sous formes de cations Fe2+ puis Fe3+ et Al3+ qui vont former des hydroxydes de métal qui entraînent par adsorption les impuretés de l’effluent en diminuant le potentiel Zêta de ces impuretés. Le réacteur électrochimique utilisé est constitué de deux électrodes métalliques (Fe ou Al) planes et parallèles qui laissent passer entre elles l’effluent à traiter. Des densités de courant de 50 à 200 A/m2 ont été appliquées pour traiter les trois effluents. L’un est un effluent directement issu d’une usine textile (effluent « usine »). Un second provient du flux d’entrée de la station d’épuration du site qui collecte les effluents de plusieurs usines (effluent « station »). Le troisième est un effluent artificiel de tannerie, créé en ajoutant 200 ppm de chrome VI à l’effluent « station ». Pour chaque expérience, la densité de courant et le temps de traitement vont déterminer la charge électrique et la concentration en métal dissous atteinte. L’influence de ces quatre paramètres sur l’élimination de la DCO, de l’absorbance, de la turbidité, du COT et du chrome hexavalent a été étudiée. L’évolution au cours du temps d’autres paramètres de l’EC tels que le pH, la tension, le rendement faradique et la dissolution métallique ont été étudiés afin de comprendre leur rôle dans le procédé. Le traitement a permis d’avoir un abattement maximal de DCO de 82% et 80% pour l’effluent « station » traité respectivement avec les électrodes de fer et d’aluminium ; 75 et 67% pour l’effluent « usine » traité respectivement avec les électrodes de fer et d’aluminium. L’abattement du chrome est de 100% avec les électrodes de fer mais tombe à 70% avec celles en aluminium. Des modèles d’élimination de la DCO et de l’absorbance ont été établis pour chaque matériau d’électrode utilisé. Le modèle d’élimination du chrome VI a été établi à partir du traitement avec les électrodes de fer. Une étude de la spéciation des espèces a permis de déterminer les pH optimaux de coagulation-floculation pour chaque métal impliqué (Al, Fe, Cr). La compétitivité entre l’abattement de la pollution organique et du Chrome a aussi été étudiée pour chaque type d’électrode
Electrocoagulation (EC) is a water treatment technology that relies on the electrochemical sacrificial anodes (in Fe or Al) dissolution. This metal dissolve themselves in Al3+ and Fe2+ cations that later oxidise to Fe3+ ions. These cations form metal hydroxides that adsorb the impurities of the effluent while decreasing the zeta potential. The electrochemical reactor used consists on two plane parallel metal electrodes with recirculation of the effluent to be treated between them. Current densities from 50 to 200 A/m2 were imposed to treat each effluent. Three effluents were used in this study. The first one is an effluent sampled at the outlet of a textile plant (« plant »). The second one is a mixture of several effluents coming from different plant and collected at the inlet of the wastewater treatment (« treatment plant »). The last one is a wastewater tannery plant simulated by addition of 200 ppm Chromium VI in the treatment plant effluent. For each experience the current density and the time of treatment rule the electrical charge and the concentration in dissolved metal reached. The influence of these four parameters on the elimination of COD, absorbance, turbidity, COT and hexavalent chromium content has been studied. Parameters e.g. potential, faradic yield, metal dissolution and pH have also been continuously monitored to better understand their role on EC process. The results show that DCO abatement reached 80 and 82% for treatment plant effluent, respectively with iron and aluminium electrodes; and 75 and 67% for plant effluent, respectively with iron and aluminium electrodes. The chromium treatment yields 100 % abatement with Fe electrodes whereas it is only 70% using Al electrodes. Models have been developed for COD and absorbance removal for the two electrode materials. Model for chromium (VI) treatment has been established considering all reactions occurring for iron EC. Metal speciation study allowed us to determine the optimal pH of coagulation –flocculation for each metal involved in the treatment (Al, Fe, Cr). Competition between organic pollution removal and chromium elimination has been also investigated for each electrode material
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Campos, Pena Aline C., L. F. Trierweiler y M. Gutterres. "Influence of Photoperiod on Biomass Production and Removal of Nutrients from Tannery Effluents with Microalgae Consortium - 19". Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34223.

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Content: Wastewater from tanneries besides having toxic compounds also contain nutrients such as carbon, phosphorus, and nitrogen, which facilitate the rapid multiplication of microalgae. Currently, many types of researches search microalgae capable of growing in industrial effluents, exploiting the advantages of removing the nutrients present in these waters and producing biomass with high value- added. The liquid effluents produced in tanneries for finished leather have essential nutrients for the growth of microalgae, but also some compounds that may restrict or hinder the growth of microalgae in this medium. Therefore, the present work has the objective to evaluate the growth of a microalgae consortium (collected in a wastewater treatment plant of a beamhouse tannery) for the removal of phosphorus and ammonia from wastewater streams of a tannery (processing wet-blue to finished leather) with different photoperiods. Microalgae consortium was cultivated at two different compositions of mixtures of raw wastewater (R) and wastewater after secondary biological treatment (B): 50% of R + 50% of B, (50R50B) and 75% of R + 25% of B, (75R25B), in photoperiod of 24 hours and 12 hours of light, temperature of 25 °C and constant aeration. The growth of microalgae in the effluent and the removal of phosphorus and ammonia were monitored throughout the cultivation. The microalgae consortium presented maximum biomass concentrations in the 75R25B effluent (1.40 g L-1) and phosphorus removal (97.64% for the 50R50B and 95.54% for the 75R25B) effluent and ammonia removal (100%) for both effluent with 24-hour photoperiod light. Take-Away: In this study, it was found that the microalgae consortium can survive in wastewater from tanneries (processing wet-blue to finished leather) and exhibit removals of phosphorus and ammonia from the medium. The 24-hour light photoperiod presented better microalgae growth and nutrient removal results.
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Rajamani, Sengoda. "Sustainable Tannery Effluent Treatment System with TDS Management - 58". Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34334.

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Content: Sustainable tannery effluent treatment system in achieving required discharge standards including Total Dissolved Solids (TDS) is one of the major challenges faced by the World Leather Industry. Conventional treatment system reduces Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Suspended Solids (SS), heavy metals etc. and not the TDS and salinity. To achieve the TDS level, the tanneries in South India were forced to adopt Zero Liquid Discharge (ZLD) system by incorporating Reverse Osmosis (RO) system and Multiple Effect Evaporator (MEE). Though recovery of water is beneficial to certain extend in adopting ZLD system, the major challenges are high energy consumption, huge operation & maintenance cost and no safe disposal method for large quantity of mixed/contaminated salt generated from MEE. In view of the challenges faced in adoption of ZLD system, sustainable major technological developments have been made to control more than 50% of TDS in the effluent by adopting cleaner tanning process, segregation of saline streams, treatment and recovery of chromium and salt for reuse by the member units. The balance composited waste stream with low TDS is further treated and taken for mixing/dilution with treated domestic sewage to achieve all discharge standards including TDS. This development is being implemented in many tannery clusters in India such as Pallavaram in South India and Jajmau, Unnao, Banthar, etc. in North India. The Common Effluent Treatment Plants (CETPs) are being upgraded with financial support from Govt. of India and respective State Governments. Take-Away: Improved Chrome Recovery System for Reuse, Recovery of Salt from Saline Stream and Reuse, Sustainable TDS Management
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Song, Zhi. "Investigation of the treatment of mixed tannery wastewater". Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341800.

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Barakat, Sabine. "Chromium distribution and speciation in water and sediments affected by tannery effluent in Veneto (Italy)". Thesis, University of the West of England, Bristol, 2004. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407285.

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Hurlaborde, Jean-Jacques d'. "Conditions nécessaires à la nitrification des effluents de tannerie en fosse d'oxydation". Lyon 1, 1987. http://www.theses.fr/1987LYO11734.

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Nitrification realisable simultanement a l'epuration carbonee par le procede des boues activees. Une etude sur pilote a permis, en s'appuyant sur les caracteristiques de cette microflore nitrifiante, de degager des consignes de gestion et de dimensionnement pour que la nitrification soit possible
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Libros sobre el tema "Tannery effluents"

1

De, Sirshendu. Treatment of tannery effluents by membrane separation technology. New York: Nova Science Publishers, 2009.

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De, Sirshendu. Treatment of tannery effluents by membrane separation technology. Hauppauge, N.Y: Nova Science Publishers, 2009.

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De, Sirshendu. Treatment of tannery effluents by membrane separation technology. New York: Nova Science Publishers, 2009.

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Shah, Maulin P. y Susana Rodriguez-Couto. Developments in Wastewater Treatment Research and Processes: Advanced Oxidation Processes for Tannery Effluent. Elsevier, 2024.

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Capítulos de libros sobre el tema "Tannery effluents"

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Tripathi, Alok y Sheeba Narayanan. "Solar Photocatalytic Treatment of Tannery Effluents". En Water Pollution and Remediation: Photocatalysis, 359–89. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-54723-3_11.

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Wang, Zhiwei. "Membrane Bioreactors for Treatment of Tannery Effluents". En Encyclopedia of Membranes, 1–2. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-40872-4_2154-1.

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Boddu, Sumalatha y Anoar Ali Khan. "Technological Advancement of Membrane Treatment for Tannery Effluents Management". En Membrane and Membrane-Based Processes for Wastewater Treatment, 153–64. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003165019-9.

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Shaibur, Molla Rahman. "Effectiveness of Water Hyacinth and Arum Shoot Powders to Remove Cr and Cu from Tannery Effluents". En Advances in Science, Technology & Innovation, 187–91. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-00808-5_44.

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Garg, Satyendra Kumar, Manikant Tripathi y Thiruneelakantan Srinath. "Strategies for Chromium Bioremediation of Tannery Effluent". En Reviews of Environmental Contamination and Toxicology, 75–140. Boston, MA: Springer US, 2012. http://dx.doi.org/10.1007/978-1-4614-2329-4_2.

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Rokade, Pramod Baburao. "Effect of Tannery Effluent on Behavior of Fishes". En Impacts of Tannery Operations on Guppy, Poecilia reticulata, 29–31. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57654-1_6.

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Vaishnavi, S., C. Thamaraiselvi y Muthunarayanan Vasanthy. "Efficiency of Indigenous Microorganisms in Bioremediation of Tannery Effluent". En Waste Water Recycling and Management, 151–68. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-2619-6_13.

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Silambarasan, Tamil Selvan, Manickam Dakshinamoorthi Balakumaran, Subramaniyam Suresh, Velramar Balasubramanian, Muthusamy Sanjivkumar, Balasundaram Sendilkumar y Ramamurthy Dhandapani. "Bioremediation of Tannery Effluent Contaminated Soil: A Green Approach". En Advances in Bioremediation and Phytoremediation for Sustainable Soil Management, 283–300. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-89984-4_18.

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Suman, Harshika y Vikas K. Sangal. "An Inside for the Treatment of Tannery Industry Effluent". En Advances in Chemical, Bio and Environmental Engineering, 909–25. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-96554-9_60.

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Gupta, Pratishtha, Rupa Rani, Avantika Chandra, Sunita Varjani y Vipin Kumar. "The Role of Microbes in Chromium Bioremediation of Tannery Effluent". En Energy, Environment, and Sustainability, 369–77. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-3259-3_17.

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Actas de conferencias sobre el tema "Tannery effluents"

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Abba, P., S. Djepang, S. Laminsi, Jean-Louis Brisset, Eugen Hnatiuc y Bogdan Hnatiuc. "Pollution abatement of tannery workshop effluents". En 2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM). IEEE, 2014. http://dx.doi.org/10.1109/optim.2014.6850963.

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Tyagi, R. N. y Hena Zaheer. "Certain effect of Tannery effluents on histophysiology of importal vital organs of Clarias batrachus (Linn)". En 2014 International Conference on Advances in Engineering and Technology Research (ICAETR). IEEE, 2014. http://dx.doi.org/10.1109/icaetr.2014.7012858.

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Aquije Morey, Llajandra, Ricardo D. Zanabria Chuchon, Carlos A. Castañeda Olivera, Jorge L. Jave Nakayo y Elmer G. Benites Alfaro. "Systematic Review And Meta-Analysis Of The Application Of Microorganisms For The Cr(VI) Removal From Tannery Effluents". En The 19th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Prospective and trends in technology and skills for sustainable social development” “Leveraging emerging technologies to construct the future”. Latin American and Caribbean Consortium of Engineering Institutions, 2021. http://dx.doi.org/10.18687/laccei2021.1.1.145.

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Llaro Castro, Alvin Yomar, Carlos Daniel Mendoza Lara, Grant Ilich Llaque Fernández, Jessica Marleny Lujan Rojas, Marlon Walter Valderrama Puscan y Flor Alicia Calvanapón Alva. "Physical-chemical treatments of tannery effluents for their adequate disposal in the sewage system of the province of Trujillo." En 2nd LACCEI International Multiconference on Entrepreneurship, Innovation and Regional Development (LEIRD 2022): “Exponential Technologies and Global Challenges: Moving toward a new culture of entrepreneurship and innovation for sustainable development”. Latin American and Caribbean Consortium of Engineering Institutions, 2022. http://dx.doi.org/10.18687/leird2022.1.1.20.

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Farid, Mujahid, Rahat Arshad, Zaki ul Zaman Asam y Mohsin Abbas. "Microbes and citric acid assisted treatment of tannery effluents by Lemna minor and Typa latifolia in a constructed wetland: A lab scale study". En Goldschmidt2023. France: European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.13658.

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Fathima, A. Shaheen, R. Bhuvaneswari y J. Jeyanthi. "Characterization of tannery effluent and synthesis of natural coagulant". En PROCEEDINGS OF ADVANCED MATERIAL, ENGINEERING & TECHNOLOGY. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0019492.

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Mukherjee, Biman y Asit Kumar Mitra. "Separation of Chromium from Tannery Effluent by Reverse Osmosis". En World Water and Environmental Resources Congress 2003. Reston, VA: American Society of Civil Engineers, 2003. http://dx.doi.org/10.1061/40685(2003)265.

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Sakthivel, E. y M. Deepak. "Treatment of tannery effluent with activated carbon derived from tannery sludge and wood wastes by co-pyrolysis method". En INTERNATIONAL CONFERENCE ON MINERALS, MATERIALS AND MANUFACTURING METHODS (ICMMMM). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0158670.

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Kandasamy, Senthilkumar, Naveenkumar Manickam y Balaji Dhandapani. "Studies on generation of bio-energy from tannery effluent using MFC". En NATIONAL CONFERENCE ON ENERGY AND CHEMICALS FROM BIOMASS (NCECB). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0005526.

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Simonič, Marjana. "Electrocoagulation Implementation for Textile Wastewater Treatment Processes". En International Conference on Technologies & Business Models for Circular Economy. University of Maribor Press, 2023. http://dx.doi.org/10.18690/um.fkkt.1.2023.6.

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Electrocoagulation (EC) has been employed recently to treat tannery, textile, and coloured wastewater. Three main processes are gathered in EC process, namely electrochemistry, coagulation, and flotation. This technique uses DC currents source between metal electrodes immersed in the textile effluent, which causes the dissolution of electrode plates into the effluent. The main advantage of EC compared to chemical coagulation technique is that EC generates less sludge. The objective of the present manuscript is to review the potential of electrocoagulation for the treatment of textile effluent. The most influential factors on removal efficiency, such as initial pH, time of EC, conductivity, current density, initial dye concentration and periodically reversal current on electrodes were discussed. Considering the circular economy concept, which focuses on positive society-wide benefits, manufacturing brick or ceramic materials is feasible method for disposing sludge.
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