Готові списки джерел за темами / Wastewater valorization

Добірка наукової літератури з теми "Wastewater valorization"

Автор: Grafiati

Опубліковано: 14 березня 2023

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Статті в журналах з теми "Wastewater valorization"

Alalam, Sabine, Farah Ben-Souilah, Marie-Hélène Lessard, Julien Chamberland, Véronique Perreault, Yves Pouliot, Steve Labrie, and Alain Doyen. "Characterization of Chemical and Bacterial Compositions of Dairy Wastewaters." Dairy 2, no. 2 (April 1, 2021): 179–90. http://dx.doi.org/10.3390/dairy2020016.

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The dairy industry produces large amounts of wastewater, including white and cleaning wastewater originating principally from rinsing and cleaning-in-place procedures. Their valorization into process water and non-fat milk solids, in the case of white wastewater, or the renewal of cleaning solutions could be achieved using pressure-driven membrane processes. However, it is crucial to determine the intrinsic characteristics of wastewaters, such as proximate composition and bacterial composition, to optimize their potential for valorization. Consequently, white and cleaning wastewaters were sampled from industrial-scale pasteurizers located in two different Canadian dairy processing plants. Bacterial profiles of dairy wastewaters were compared to those of tap waters, pasteurized skim milk and unused cleaning solutions. The results showed that the physicochemical characteristics as well as non-fat milk solids contents differed drastically between the two dairy plants due to different processing conditions. A molecular approach combining quantitative real-time polymerase chain reaction (qPCR) and metabarcoding was used to characterize the bacteria present in these solutions. The cleaning solutions did not contain sufficient genomic DNA for sequencing. In white wastewater, the bacterial contamination differed depending on the dairy plant (6.91 and 7.21 log10 16S gene copies/mL). Psychrotrophic Psychrobacter genus (50%) dominated white wastewater from plant A, whereas thermophilic Anoxybacillus genus (56%) was predominant in plant B wastewater. The use of cold or warm temperatures during the pasteurizer rinsing step in each dairy plant might explain this difference. The detailed characterization of dairy wastewaters described in this study is important for the dairy sector to clearly identify the challenges in implementing strategies for wastewater valorization.

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Jeguirim, Mejdi, and Salah Jellali. "Wastewater Treatment, Valorization, and Reuse." Water 13, no. 4 (February 21, 2021): 548. http://dx.doi.org/10.3390/w13040548.

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Ţurcanu, Anca Andreea, Ecaterina Matei, Maria Râpă, Andra Mihaela Predescu, George Coman, and Cristian Predescu. "Biowaste Valorization Using Hydrothermal Carbonization for Potential Wastewater Treatment Applications." Water 14, no. 15 (July 29, 2022): 2344. http://dx.doi.org/10.3390/w14152344.

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In today’s world, due to population increase, there are many alarming and potential catastrophic problems like climate change, environmental pollution and an enormous mass of wastes constantly produced by humankind to find innovative solutions for the management, recycling, and valorization of biowaste from agricultural production, food processing, and organic household residues. The search for sustainable and efficient wastewater treatment technologies has gained scientific interest recently; particular focus is on using biowaste to produce hydrochars (HCs) via the hydrothermal carbonization (HTC) process used as adsorbent materials for dye, heavy metal, and emerging pollutant removal. HTC materials derived from renewable resources are an environmentally friendly and adequate way to adsorb pollutants such as organic and inorganic molecules from wastewaters. This review focuses on the advantages of the HTC process which lead to improved properties of the materials obtained, making them highly efficient in wastewater treatment. The information presented in this paper was derived from the most recent publications in the field. Future perspectives of HC materials should consider the possibilities of scale-up, pretreatment of biowastes, and the optimal parameters of the HTC process to produce HCs applied for pollutant removal from wastewaters.

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Broos, Waut, Nikolett Wittner, Jordi Geerts, Jan Dries, Siegfried E. Vlaeminck, Nina Gunde-Cimerman, Aurore Richel, and Iris Cornet. "Evaluation of Lignocellulosic Wastewater Valorization with the Oleaginous Yeasts R. kratochvilovae EXF7516 and C. oleaginosum ATCC 20509." Fermentation 8, no. 5 (April 30, 2022): 204. http://dx.doi.org/10.3390/fermentation8050204.

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During the conversion of lignocellulose, phenolic wastewaters are generated. Therefore, researchers have investigated wastewater valorization processes in which these pollutants are converted to chemicals, i.e., lipids. However, wastewaters are lean feedstocks, so these valorization processes in research typically require the addition of large quantities of sugars and sterilization, which increase costs. This paper investigates a repeated batch fermentation strategy with Rhodotorula kratochvilovae EXF7516 and Cutaneotrichosporon oleaginosum ATCC 20509, without these requirements. The pollutant removal and its conversion to microbial oil were evaluated. Because of the presence of non-monomeric substrates, the ligninolytic enzyme activity was also investigated. The repeated batch fermentation strategy was successful, as more lipids accumulated every cycle, up to a total of 5.4 g/L (23% cell dry weight). In addition, the yeasts consumed up to 87% of monomeric substrates, i.e., sugars, aromatics, and organics acids, and up to 23% of non-monomeric substrates, i.e., partially degraded xylan, lignin, cellulose. Interestingly, lipid production was only observed during the harvest phase of each cycle, as the cells experienced stress, possibly due to oxygen limitation. This work presents the first results on the feasibility of valorizing non-sterilized lignocellulosic wastewater with R. kratochvilovae and C. oleaginosum using a cost-effective repeated batch strategy.

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Welz, P. J. "Edible seed oil waste: status quo and future perspectives." Water Science and Technology 80, no. 11 (December 1, 2019): 2107–16. http://dx.doi.org/10.2166/wst.2020.043.

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Abstract Large volumes of process water and steam are required for extraction and refining of edible seed oils. Water usage in most industries has decreased over the years as increasing emphasis is being placed on water re-use in modern facilities. However, given the size of the edible seed oil industry globally, there is a lack of current quantitative data about water use and wastewater generation. As the world moves towards a circular economy and water becomes more scarce, it is imperative that the industry players provide meaningful input/output data in order to benchmark and identify areas for waste valorization. This review provides data currently available in the public domain on the specific wastewater intake and wastewater generation by the edible seed oil industry, highlighting the need for further data collection. In addition, wastewater quality and current and future wastewater treatment technologies are discussed, as well as the potential for valorization of solid waste and effluent from the industry, and potential avenues for future research.

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Li, Yalin, Sydney A. Slouka, Shanka M. Henkanatte-Gedera, Nagamany Nirmalakhandan, and Timothy J. Strathmann. "Seasonal treatment and economic evaluation of an algal wastewater system for energy and nutrient recovery." Environmental Science: Water Research & Technology 5, no. 9 (2019): 1545–57. http://dx.doi.org/10.1039/c9ew00242a.

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Torres-Valenzuela, Laura Sofia, Ana Ballesteros-Gomez, Johanna Serna, Andrea Arango, and Soledad Rubio. "Supramolecular solvents for the valorization of coffee wastewater." Environmental Science: Water Research & Technology 6, no. 3 (2020): 757–66. http://dx.doi.org/10.1039/c9ew01095e.

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Ouslimani, N., F. Zrari, M. T. Abadlia, and H. Benabed. "Valorization of Fibrous Waste for the Wastewater Discoloration." Asian Journal of Chemistry 25, no. 15 (2013): 8603–6. http://dx.doi.org/10.14233/ajchem.2013.14860.

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Shi, Shuai, Guoren Xu, Huarong Yu, and Zhao Zhang. "Strategies of valorization of sludge from wastewater treatment." Journal of Chemical Technology & Biotechnology 93, no. 4 (February 26, 2018): 936–44. http://dx.doi.org/10.1002/jctb.5548.

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Aissa, Imen, Nadia Kharrat, Fatma Aloui, Mohamed Sellami, Mohamed Bouaziz, and Youssef Gargouri. "Valorization of antioxidants extracted from olive mill wastewater." Biotechnology and Applied Biochemistry 64, no. 4 (February 28, 2017): 579–89. http://dx.doi.org/10.1002/bab.1509.

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Більше джерел

Дисертації з теми "Wastewater valorization"

Truzzi, Federica. "Valorization of biorefinery wastewater to carboxylates." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8438/.

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La tesi della ha come obiettivo la valorizzazione delle acque di scarto derivanti dalla produzione del bioetanolo da colture cerealicole dedicate. Nella prima parte si studia la produzione di VFA mediante digestione anaerobica. In seguito, sono eseguiti batch tests per valutare la conversione dei VFA in MCFA. Infine, si focalizza sul processo di dowstream per il recupero degli acidi carbossilici dal brodo di fermentazione attraverso reactive extraction e back extraction.

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Iervolino, Giuseppina. "Advanced oxidation processes for food industry wastewater valorization and treatment." Doctoral thesis, Universita degli studi di Salerno, 2017. http://hdl.handle.net/10556/2616.

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2015 - 2016
The research of new eco-friendly technologies that enable the production of energy is nowadays one of the topics of greatest interest to the scientific community. The population has chosen to break free from the use of fossil fuels, and this leads to the study and development of processes for the production of clean energy starting from biomass. However, at the same time, the concern of the industry is also the disposal and treatment of wastewater. Starting from these considerations, it is advisable to develop processes that, under mild conditions, allow to obtain interesting hydrogen or methane yields. This objective could be achieved through the use advanced oxidation processes (AOPs), such as heterogeneous photocatalysis, photo-Fenton like reaction and photoelectrocatalysis. So, an interesting approach is to explore, in parallel to wastewater treatment, the possibility to produce also an energy source such as hydrogen and/or methane from the degradation of organic substance present in wastewater by AOPs. Considering the characteristic of food industries wastewaters, it is interesting to evaluate the performances of advanced oxidation processes for their treatment aimed to the valorization, through the conversion of specific substances (sugars), in order to obtain compounds with high energetic value, but also for removing substances hardly biodegradable (such as food dyes) that could be present in these industry wastewaters. In this PhD thesis it has been studied the performances of the photocatalytic process for the hydrogen production from food industries wastewaters. In particular, starting from synthetic solution containing glucose, it was evaluated the effect of the presence of noble metals on the semiconductor surface and the effect of the photoactive support (TiO2). Subsequently, providing for the application of heterogeneous photocatalysis to industrial level, the study has been directed to the formulation of a noble metal free photocatalyst with good performances in the production of hydrogen and in the degradation of the sugars present in the solutions. The final formulation was represented by LaFeO3 (a perovskite with semiconducting properties) prepared by combustion flame method. To improve the performances under visible light, LaFeO3 was modified with Ru (Ru-LaFeO3), whose cost is much lower than those of Pd, Pt or Au. Always perspective of the application of the process to industrial level, it was developed a structured photocatalyst for solving the problems related to the photocatalyst separation after the treatment. In particular it was studied the efficiency of magnetic Fe2O3 as support for Ru-LaFeO3. It was also investigated the photoelectrocatalytic process for the hydrogen production, considering the general aspects of the process, the advantages and in particular the attention has been focused on the electrodeposition process for the synthesis of Fe2O3 based photoanodes. Finally, the aim has been the application of the photocatalytic process on a real wastewater coming from the washing process of the fruit (especially cherries). It was not underestimated the presence of food dyes in these types of wastewater. For this reason it was evaluated the efficiency of photo-Fenton process in the removal of several food dyes (such as Red Allura and Tartrazine) using LaFeO3 deposited on corundum monoliths. In addition, it has been evaluated the possibility to couple the photocatalytic process (used for the valorization of the wastewater through the production of hydrogen) to the optimized photo-Fenton system to completely remove the not-biodegradable substances still present in the wastewaters recovered after the photocatalytic treatment using Ru-LaFeO3 supported on magnetic Fe2O3 particles. [edited by author]
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Barbosa, Rui Pedro Fernandes. "Study on the valorization routes of ashes from thermoelectric power plants working under mono-and co-combustion regimes." Doctoral thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/11078.

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Thesis submitted to obtain the Doctoral degree in Energy and Bioenergy
The main objective of this thesis was to study new valorization routes of ashes produced in combustion and co-combustion processes. Three main valorization pathways were analyzed: (i)production of cement mortars, (ii) production of concretes, and (iii) use as chemical agents to remove contaminants from wastewaters. Firstly, the ashes produced during the mono-combustion of coal, co-combustion of coal and meat and bone meal (MBM), and mono-combustion of MBM were characterized. The aim of this study was to understand the ashes properties in extreme levels of substitution of coal by a residue with a high contamination of specific metals. The substitution of coal by MBM produced ashes with higher content of heavy metals. Secondly, the ashes coming from an industrial power plant working under mono-combustion(coal) and co-combustion conditions (coal+sewage sludge+MBM) were studied. The use of cofuels did not promote significant changes in the chemical and ecotoxicological properties of ashes. Fly ashes were successfully stabilized/solidified in cement mortar, and bottom and circulating ashes were successfully used as raw materials in concrete. The third step involved the characterization and valorization of biomass ashes resulting from the combustion of forestry residues. The highest concentrations of metals/metalloids were found in the lowest particle size fractions of ashes. Biomass ashes successfully substituted cement and natural aggregates in concretes, without compromising their mechanical, chemical, and ecotoxicological properties. Finally, the biomass ashes were tested as chemical agents to remove contaminants from wastewaters. The removal of P, mainly phosphates, and Pb from wastewaters was assayed. Biomass ashes presented a high capacity to remove phosphates. As fly ashes were more efficient in removing phosphates, they were further used to remove Pb from wastewaters. Again, they presented a high efficiency in Pb removal. New potential valorization routes for these ashes are now opened, contributing to improve their valorization rates.
Fundação para a Ciência e a Tecnologia - SFRH/BD/62372/2009 ; European Project “COPOWER

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PIETRICOLA, GIUSEPPE. "Waste valorization trough dehydrogenase enzymes immobilized on low-cost inorganic supports." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2969232.

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Laera, Andreina. "Development of a biorefinery scheme for the valorization of olive mill wastewaters and grape pomaces." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8551/.

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In the Mediterranean area, olive mill wastewater (OMW) and grape pomace (GP) are among the major agro-industrial wastes produced. These two wastes have a high organic load and high phytotoxicity. Thus, their disposal in the environment can lead to negative effects. Second-generation biorefineries are dedicated to the valorization of biowaste by the production of goods from such residual biomasses. This approach can combine bioremediation approaches to the generation of noble molecules, biomaterials and energy. The main aim of this thesis work was to study the anaerobic digestion of OMW and GP under different operational conditions to produce volatile fatti acids (VFAs) (first stage aim) and CH4 (second stage aim). To this end, a packed-bed biofilm reactor (PBBR) was set up to perform the anaerobic acidogenic digestion of the liquid dephenolized stream of OMW (OMWdeph). In parallel, the solid stream of OMW (OMWsolid), previously separated in order to allow the solid phase extraction of polyphenols, was addressed to anaerobic methanogenic digestion to obtain CH4. The latter experiment was performed in 100ml Pyrex bottles which were maintained at different temperatures (55-45-37°C). Together with previous experiments, the anaerobic acidogenic digestion of fermented GP (GPfreshacid) and dephenolized and fermented GP (GPdephacid) was performed in 100ml Pyrex bottles to estimate the concentration of VFAs achievable from each aforementioned GPs. Finally, the same matrices of GP and not pre-treated GP (GPfresh) were digested under anaerobic methanogenic condition to produce CH4. Anaerobic acidogenic and methanogenic digestion processes of GPs lasted about 33 days. Instead, the anaerobic acidogenic and methanogenic digestion process of OMWs lasted about 121 and 60 days, respectively. Each experiment was periodically monitored by analysing volume and composition of produced biogas and VFA concentration. Results showed that VFAs were produced in higher concentrations in GP compared to OMWdeph. The overall concentration of VFAs from GPfreshacid was approximately 39.5 gCOD L-1, 29 gCOD L-1 from GPdephacid, and 8.7 gCOD L-1 from OMWdeph. Concerning the CH4 production, the OMWsolid reached a high biochemical methane potential (BMP) at a thermophilic temperature (55°) than at mesophlic ones (37-45°C). The value reached was about 358.7 mlCH4 gSVsub-1. In contrast, GPfresh got a high BMP but at a mesophilic temperature. The BMP was about 207.3 mlCH4 gSVsub-1, followed by GPfreshacid with about 192.6 mlCH4 gSVsub-1 and lastly GPdephacid with about 102.2 mlCH4 gSVsub-1. In summary, based on the gathered results, GP seems to be a better carbon source for acidogenic and methanogenic microrganism compared to OMW, because higher amount of VFAs and CH4 were produced in AD of GP than OMW. In addition to these products, polyphenols were extracted by means of a solid phase extraction (SPE) procedure by another research group, and VFAs were utilised for biopolymers production, in particular polyhydroxyalkanoates (PHAs), by the same research group in which I was involved.

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Ren, Baiming. "Transforming alum sludge into value-added products for various reuse." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2019. http://www.theses.fr/2019EMAC0002.

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La forte augmentation de la population mondiale entraîne une demande croissante en eau potable. La production d'eau potable est accompagnée par la génération de résidus du traitement de l'eau dont la boue d'aluminium qui est donc largement disponible mondialement. Ce travail se concentre sur l'identification des différentes voies de valorisation des boues d'aluminium afin de les réutiliser dans le domaine de l’environnement. Deux sources de boues d'aluminium, collectées en France et en Irlande, ont été étudiées dans divers domaines d’application en fonction de leurs caractéristiques. Tout d'abord, les boues d'aluminium ont été utilisées en remplacement d’une partie de l'argile dans la fabrication des briques, en incorporant différents pourcentages de boues d'aluminium et à différentes températures. Les briques résultantes ont été caractérisées et les résultats ont montré que les briques composées de boues d'aluminium et d'argile sont conformes aux « normes européennes et irlandaises » et démontrent ainsi le potentiel pour une application industrielle des boues d'aluminium dans la fabrication de briques en terre cuite irlandaises. Dans un second temps, les boues d’aluminium ont été utilisées comme adsorbant des polluants présents dans l’agriculture. Le glyphosate est un ingrédient actif dans les pesticides utilisés massivement dans l'agriculture irlandaise et représente une problématique environnementale. La boue d’aluminium et la tourbe irlandaise ont été comparées pour l’élimination du glyphosate lors de tests en pot à l’échelle laboratoire. Les résultats ont montré que la boue d’aluminium permet d’éliminer le glyphosate à plus de 99% et réduire les niveaux de DCO. Cet aspect scientifique a permis d’être dans la sélection des adsorbants possibles pour le traitement des eaux usées agricoles en Irlande. Le co-conditionnement et la déshydratation des boues de station d’épuration avec des boues d’aluminium liquides ont également été étudiés. Pour cela, le Jar test a été effectué sur des boues issues d’une station de traitement des eaux française. Les résultats ont montré que le rapport optimal de mélange des boues est de 1:1 (boues d’épuration : boues d’aluminium). Ainsi, la quantité de polymère utilisée peut être diminuée de 14 fois par rapport aux technologies actuelles. Cette approche a permis de montrer la possible valorisation des boues d’aluminium comme un moyen durable et technique permettant ainsi l’élimination des boues localement pour une même station de traitement des eaux. Une autre voie de valorisation des boues d’aluminium comme adsorbant pour la purification des gaz a été étudiée lors d’expériences d’adsorption de H2S dans un réacteur à lit fixe dans différentes conditions expérimentales. Les données expérimentales d’adsorption du H2S ont été modélisées à l'aide de modèles empiriques basés sur la cinétique des processus d'adsorption. Les résultats ont montré que les boues d'aluminium sont un adsorbant efficace pour l'élimination du H2S (capacité de 374,2 mg H2S / g solide) et que des mécanismes mis en jeu sont l'adsorption dissociative et l'oxydation. Les coefficients de transfert de masse globaux ont également été calculés et pouvant ainsi être utilisés pour la prédiction. Enfin, les gâteaux de boues d'aluminium ont été réutilisés pour la purification simultanée d’H2S et le traitement des eaux usées. Les résultats ont montré la capacité de cet adsorbant pour éliminer tout le H2S présent avec une grande efficacité d’élimination de la DCO, TN et TP. Ainsi, il a été démontré la valorisation des boues d’aluminium en tant qu’adsorbant pour une purification du H2S simultanée avec le traitement des eaux usées
The production of drinking water always accompanied by the generation of water treatment residues (WTRs). Alum sludge is one of the WTRs, it is an easily, locally and largely available by-product worldwide. This work focuses on the identification of different ways to valorize the alum sludge for environmentally friendly reuse. Two alum sludges collected from France and Ireland have been reused in various fields as a function of their characteristics. Firstly, alum sludge was used as a partial replacement for clay in brick making, by incorporating different percentages of alum sludge and calcined at different temperatures (range from 800 to 1200 °C). The resultant bricks were tested for compression, Loss on Ignition, water absorption, appearance, etc. Results show that alum sludge-clay bricks have met the “European and Irish Standards” and demonstrated the huge industrial application potential for alum sludge in Irish clay brick manufacturing. Glyphosate is an active ingredient in pesticide which is massive employed in agriculture. Alum sludge and Irish peat were compared for glyphosate removal in pot tests, results show that alum sludge present significant glyphosate removal capacity (>99 %) and could reduce the level of Chemical Oxygen Demand (COD). It provided a scientific clue for sorbents selection when considering the agricultural wastewater treatment in Ireland and to maximize their value in practice. The co-conditioning and dewatering of sewerage sludge with liquid alum sludge was also investigated in Jar-test based on the case analysis of a water industry in France. Results show that the optimal sludge mix ratio is 1:1, the use of the alum sludge has been shown to beneficially enhance the dewaterability of the resultant mixed sludge, and highlighting a huge polymer saving (14 times less than the current technologies) and provided a sustainable and technical sludge disposal route for the local water industry. The use of alum sludge as a sorbent for gas purification was studied by H2S adsorption experiments in a fixed-bed reactor with various operating parameters. The experimental breakthrough data were modeled with empirical models based on adsorption kinetics. Results show that alum sludge is an efficient sorbent for H2S removal (capacity of 374.2 mg/g) and the mechanisms including dissociative adsorption and oxidation were proposed. Moreover, the overall mass transfer coefficients were calculated which could be used for the process scaling up. Finally, alum sludge cakes were reused in the novel aerated alum sludge constructed wetland (CW), which were designed for simultaneous H2S purification and wastewater treatment. Results show that H2S was completely removed in the six months’ trials, while the high removal efficiencies of COD, total nitrogen (TN), total phosphates (TP) were achieved. Thus, a novel eco-friendly CW for simultaneous H2S purification and wastewater treatment was developed. In the different approaches and process considered, in particular it was put in investigating and describing the mechanisms involved. Overall, this work demonstrated alum sludge could be a promising by- product for various novel beneficial reuse rather than landfilling and provided a “Circular Economy” approach for WTRs management

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Ledda, C. "A NEW BIOREFINERY MODEL FOR LIVESTOCK FARMING: MICROALGAE CULTIVATION FOR ANIMAL SLURRIES VALORIZATION." Doctoral thesis, Università degli Studi di Milano, 2015. http://hdl.handle.net/2434/252234.

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Development of livestock farming sector poses serious concerns on its environmental impact due to the production of huge volume of slurries characterized by high concentrations of organic and mineral pollutants, mainly in the form of ammonia, phosphates and carbon compounds. The aim of this work was to evaluate the possibility to use microalgae as a biological tool for the depuration of such wastewaters, assimilating the nutrients and producing an added value biomass to be used in different sectors such as the food and feed, nutraceutical and bioenergy. Chapter 1 deals with the study of a digestate treatment plant characterized by a series of physical-chemical treatments which depurate the liquid fraction of the digestate through membrane technology (ultrafiltration and reverse osmosis) allowing to discharge 50% of the slurry as clean water and to produce ammonium sulfate and nutrients-rich solids/concentrates usable as fertilizers. The ultrafiltration step produces also a clear permeate still rich in soluble nutrients that could be further used as a growth medium for microalgae production. Chapter 2 intended to demonstrate the possibility to integrate microalgae production with this system, helping to reduce the cost of slurry treatment and improving the energy balance of the process. The tolerance of the microalga Scenedesmus sp. to the permeate was evaluated, results demonstrating that percentage upper than 10% inhibited the growth of this microalga, but below this value productivity up to 124 mg L-1 d-1 could be obtained. The composition of the culture medium also influenced the biomass composition, with protein, carbohydrate and lipid content being a direct function of ammonia concentrations. It was then demonstrated that integrating microalgae production with anaerobic digestion it is possible to produce 166-190 t y-1 of microalgal valuable biomass. Chapter 3 focused on the possibility to exploit a wild microalga strain (Chlorella sp.), isolated in the farm, to improve the depuration of the digestate and the two digestate liquid fraction after centrifugation and ultrafiltration. The results demonstrated that digestate could not support a good growth, as the other two liquid stream, because of low light availability in the culture. Ultrafiltrate, on the other hand, resulted in the best biomass productivity (0.21 g L-1d-1) comparable to that obtained in a synthetic medium. All the streams were depurated with ammonia, phosphorus and COD reduction up to 98%, 99% and 70% respectively Besides these encouraging data it has been found that only 30% of the nitrogen were successfully incorporated in the microalgal biomass due to stripping processes, posing serious environmental concerns on the process In Chapter 4 astaxanthin-producer Haematococcus pluvialis was cultivated in a treated swine slurry with low-cost cascade filters. Although this microalga is slow-growing and very susceptible to contamination, it showed a sustained growth (up to 60 mg L-1 d-1 of biomass) in the waste stream reducing all the pollutants present in the wastewater. Moreover it accumulated a good amount of astaxanthin, improving the overall feasibility and sustainability of the process.

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COSENZA, Alessandro. "EXPERIMENTAL CHARACTERIZATION OF ELECTRO-MEMBRANE PROCESSES FOR THE PRODUCTION AND STORAGE OF ENERGY." Doctoral thesis, Università degli Studi di Palermo, 2022. https://hdl.handle.net/10447/567648.

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Rocha, Mariana Raquel Maia da. "Nanocatalysis as advanced technology for wastewater valorization." Doctoral thesis, 2018. https://repositorio-aberto.up.pt/handle/10216/115566.

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Rocha, Mariana Raquel Maia da. "Nanocatalysis as advanced technology for wastewater valorization." Tese, 2018. https://repositorio-aberto.up.pt/handle/10216/115566.

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Книги з теми "Wastewater valorization"

Wastewater Treatment, Valorization and Reuse. MDPI, 2021. http://dx.doi.org/10.3390/books978-3-0365-1927-2.

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Valorization of Microalgal Biomass and Wastewater Treatment. Elsevier, 2023. http://dx.doi.org/10.1016/c2021-0-00237-6.

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Integrated Wastewater Management and Valorization Using Algal Cultures. Elsevier, 2022. http://dx.doi.org/10.1016/c2020-0-00531-1.

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Demirer, Göksel N., and Sibel Uludag Demirer. Integrated Wastewater Management and Valorization Using Algal Cultures. Elsevier, 2022.

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Demirer, Göksel N., and Sibel Uludag Demirer. Integrated Wastewater Management and Valorization Using Algal Cultures. Elsevier, 2022.

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Oakley, Stewart M. Integrated Wastewater Management for Health and Valorization: A Design Manual for Resource Challenged Cities. IWA Publishing, 2022. http://dx.doi.org/10.2166/9781789061536.

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Abstract Adequate wastewater treatment in low to medium income cities worldwide has largely been a failure despite decades of funding. The still dominant end-of-pipe paradigm of treatment for surface water discharge, focusing principally on removal of organic matter, has not addressed the well-published problems of pathogen and nutrient release with continued contamination of surface waters. This book incorporates the new paradigm of integrated wastewater management for valorization without surface water discharge using waste stabilization pond systems and wastewater reservoirs. In this paradigm the purpose of treatment is to protect health by reducing pathogens to produce an effluent that is valorized for its fertilizer and water value for agriculture and aquaculture. Methane production as a sustainable energy source is also considered for those applications where it is appropriate. Emphasis is on sustainable engineering solutions for low to medium income cities worldwide. Chapters present the theory of design, followed by design procedures, example design problems, and case study examples with data, diagrams and photos of operating systems. Excel spreadsheets and the FAO program CLIMWAT/CROPWAT are included in examples throughout. Sections on engineering practice include technical training, operation and maintenance requirements, construction and sustainability. The book incorporates design and operating data and case studies from Africa, Australia, Latin America, Europe, New Zealand, and the US, including studies that have been published in French, Portuguese, and Spanish. The book is designed for upper-division and graduate level engineering students, practicing engineers, regulatory professionals who help establish and enforce effluent standards, international development professionals, and policy stakeholders. ISBN: 9781789061529 (paperback) ISBN: 9781789061536 (eBook) ISBN: 9781789061543 (ePUB)

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Oakley, Stewart. Integrated Wastewater Management for Health and Valorization: A Design Manual for Resource Challenged Cities. IWA Publishing, 2021.

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Oakley, Stewart. Integrated Wastewater Management for Health and Valorization: A Design Manual for Resource Challenged Cities. IWA Publishing, 2021.

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Частини книг з теми "Wastewater valorization"

Gupta, Asmita, Madan Kumar, and Shaili Srivastava. "Recent Advances in Wastewater Sludge Valorization." In Bio-valorization of Waste, 225–47. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9696-4_10.

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El-Emam, Doaa A. "Olive Mill Wastewater: Treatment and Valorization." In Wastewater from Olive Oil Production, 27–59. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-23449-1_2.

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Rharrabti, Yahia, and Mohamed EI Yamani. "Olive Mill Wastewater: Treatment and Valorization Technologies." In Handbook of Environmental Materials Management, 1659–86. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-73645-7_91.

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Rharrabti, Yahia, and Mohamed EI Yamani. "Olive Mill Wastewater: Treatment and Valorization Technologies." In Handbook of Environmental Materials Management, 1–28. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-58538-3_91-1.

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Yukesh Kannah, R., J. Merrylin, Preethi, P. Sivashanmugam, M. Gunasekaran, Gopalakrishnan Kumar, and J. Rajesh Banu. "Valorization of Nutrient-Rich Urinal Wastewater by Microalgae for Biofuel Production." In Application of Microalgae in Wastewater Treatment, 393–426. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13909-4_17.

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Pandey, Ashutosh, Sameer Srivastava, and Sanjay Kumar. "Phyco-Remediation of Dairy Effluents and Biomass Valorization: A Sustainable Approach." In Application of Microalgae in Wastewater Treatment, 195–213. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13909-4_9.

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Boukarma, Latifa, Rachid Aziam, Mhamed Abali, Gabriela Carja, Amina Soudani, Mohamed Zerbet, Fouad Sinan, and Mohamed Chiban. "Algal Biomass Valorization for the Removal of Heavy Metal Ions." In Inorganic-Organic Composites for Water and Wastewater Treatment, 267–302. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5928-7_8.

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Hassen, Wafa, Bilel Hassen, Rim Werhani, Yassine Hidri, Naceur Jedidi, and Abdennaceur Hassen. "Processes of Valorization and Management of Olive By-Products: The Pomace and Olive Mill Wastewater." In Wastewater from Olive Oil Production, 1–25. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-23449-1_1.

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Ángeles, Roxana, Rosario Rodero, Andrea Carvajal, Raúl Muñoz, and Raquel Lebrero. "Potential of Microalgae for Wastewater Treatment and Its Valorization into Added Value Products." In Application of Microalgae in Wastewater Treatment, 281–315. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13909-4_13.

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Musetsho, Pfano, Nirmal Renuka, Sachitra Kumar Ratha, Ismail Rawat, and Faizal Bux. "Valorization of Wastewater via Nutrient Recovery Using Algae-Based Processes." In Algae, 1–26. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7518-1_1.

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Тези доповідей конференцій з теми "Wastewater valorization"

Ribeiro, A., C. Vilarinho, J. Araújo, and J. Carvalho. "Integrated Process for Textile Cotton Waste (TCW) Valorization: Waste-to-Energy and Wastewater Decontamination." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66706.

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The increasing of world population, industrialization and global consuming, existing market products existed in the along with diversification of raw materials, are responsible for an exponential increase of wastes. This scenario represents loss of resources and ultimately causes air, soils and water pollution. Therefore, proper waste management is currently one of the major challenges faced by modern societies. Textile industries represents, in Portugal, almost 10% of total productive transforming sector and 19% of total employments in the sector composed by almost 7.000 companies. One of the main environmental problems of textile industries is the production of significant quantities of wastes from its different processing steps. According to the Portuguese Institute of Statistics (INE) these industries produce almost 500.000 tons of wastes each year, with the textile cotton waste (TCW) being the most expressive. It was estimated that 4.000 tons of TCW are produced each year in Portugal. In this work an integrated TCW valorisation procedure was evaluated, firstly by its thermal and energetic valorisation with slow pyrolysis followed by the utilization of biochar by-product, in lead and chromium synthetic wastewater decontamination. Pyrolysis experiments were conducted in a small scale rotating pyrolysis reactor with 0.1 m3 of total capacity. Results of pyrolysis experiments showed the formation of 0,241 m3 of biogas for each kilogram of TCW. Results also demonstrated that the biogas is mostly composed by hydrogen (22%), methane (14 %), carbon monoxide (20%) and carbon dioxide (12%), which represents a total high calorific value of 12.3 MJ/Nm3. Regarding biochar, results of elemental analysis demonstrated a high percentage of carbon driving its use as low cost adsorbent. Adsorption experiments were conducted with lead and chromium synthetic wastewaters (25, 50 and 100 mg L−1) in batch vessels with controlled pH. It was evaluated the behaviour of adsorption capacity and removal rate of each metal during 120 minutes of contact time using 5, 10 and 50 g L−1 of adsorbent dosage. Results indicated high affinity of adsorbent with each tested metal with 78% of removal rate in chromium and 95% in lead experiments. This suggests that biochar from TCW pyrolysis may be appropriated to wastewaters treatment, with high contents of heavy metals and it can be an effective alternative to activated carbon.

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Rabell, Valeria Caltzontzin, Claudia Gutierrez-Antonio, Juan Fernando Garcia Trejo, and Ana Angelica Feregrino-Perez. "A review on processes for whey and dairy wastewater treatment and valorization." In 2021 XVII International Engineering Congress (CONIIN). IEEE, 2021. http://dx.doi.org/10.1109/coniin54356.2021.9634792.

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El Moussaoui, Tawfik, Mohamed Oussama Belloulid, Laila Mandi, Said Wahbi, Salvatore Masi, and Naaila Ouazzani. "Eco-Efficient Approach for Wastewater Treatment and Agricultural Valorization: Fertigation Effect on Soil and Plant." In LAFOBA2. Basel Switzerland: MDPI, 2022. http://dx.doi.org/10.3390/environsciproc2022016062.

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Bergamini, Mattia Paolo, Mattia Chiavico, Laura Bracco, Anna Moglia, and Melania Buffagni. "Water Balance Assessment for Water Management in Oil & Gas Operations: A Methodological Approach." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207448-ms.

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Abstract The Water Balance Assessment is a methodological approach developed and applied by Eni for the identification of improvements in water management at site level. The approach is based on three steps. The following report describes each step and the application of the approach to a real case study in Tunisia. Water is a vital resource for our planet and for humankind. Biodiversity and ecosystems’ preservation, human health, and food security as well as energy production, industrial development and economic growth are all dependent on water. The consequences of climate change and the actual projections of increasing water demand will affect water availability and quality in the coming years. About the Oil & Gas sector, this industry consumes and produces significant volumes of water. For this reason, energy companies must consider sustainable options for the use of this resource, especially in water stress areas. This can be achieved through:A deep knowledge of the site water streams and of the context where the site is located.Identification of improvements and initiatives that could reduce the water risk of the site. About water safeguarding, Eni is committed to pursue the following practices:Water Conservation: Upstream Oil & Gas operations need significant quantities of water; a key element for its conservation includes the reduction of withdrawals and the efficiency in water use.Water Reuse and Valorization: Upstream Oil & Gas operations must manage large volumes of wastewater, mainly Produced Water. Design solutions shall introduce and maximize the recycle of water with the adoption of suitable treatments, to make discharges compatible with the reuse in the same production cycle or by third parties (e.g., other plants, local communities), and pursue the opportunity to reuse industrial water, instead of discharging it as wastewater. For their deployment, Eni has defined and applied a methodological approach to support the definition of improvement and optimization initiatives of water management at the site level. The approach represents an application of a "convergence approach" which, starting from an overall view of the site, identifies opportunities, further and more detailed areas of analysis, and design projects that can improve water use, management, and reuse. The methodological approach is based on the following steps:A country-based framework study on water resources, and water-related risks analysis at country and local level.A Water Balance Assessment, gathering water qualitative and quantitative information and site framework details.Definition of site initiatives for wastewater reuse and valorization, and for the optimization of water withdrawals, based on the above steps and considering local legislation. Through this approach, operational water risks exposure is analyzed in detail, allowing to address a wide range of opportunities for the improvement of water management, also through the development of new synergies with local communities.

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Ribeiro, A., C. Vilarinho, J. Araújo, and J. Carvalho. "Development of an Integrated Process for Eggshell Valorization." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38836.

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The current global trend towards more stringent environmental standards, technical applicability and cost-effectiveness, became key factors in the selection of adsorbents. After demonstrating the performance of eggshell-derived adsorbent under a range of lab operating conditions, this work focused the adsorption efficiency of calcined eggshell powder (CEP), in the treatment of wastewaters from different industrial units. In order to do it, the removal of organic material, expressed as chemically oxygen demand (COD), was monitored in leachate wastewaters from sanitary landfill (LLWW) and in municipal residual wastewaters (MWW). Furthermore, the efficiency of alkaline metals removal, specifically from effluents of industrial unites from superficial treatments, was also assessed. A detailed study of the eggshell characteristics, before and after the adsorption process, was carried out, aiming at investigate the adsorption mechanism underlying the removal of different pollutants. Results demonstrate that adsorption of organic material and metals in the CEP, go around 84% of organic material removal in MWW and 81% in LLWW. Finally, a removal of 95% of aluminium (Al) from MWW, deriving from anodizing industrial plant, and a removal of 88% copper (Cu), 95% chromium (Cr) and 30% nickel (Ni) from effluents of superficial treatments produced in Ni/Cr plating plants, were also determined This suggests that CEP adsorbent is appropriated to wastewaters treatment with high contents of organic matter and heavy metals, from different aqueous systems or different industries. The application of this adsorbent in this methodology showed good cost-benefits ratio, proving that it can be an effective alternative to activated carbon. However, aiming the progress and sustainability of the whole eggshell valorisation, we are further optimizing, testing and developing new techniques and products to recover the organic fraction of the eggshell through the reclamation of several bioactive peptides derived from hydrolysis of different proteins that constitute these residues. These products are intended to be introduced in the food, cosmetic and pharmaceutical markets.

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Mulinari, Jéssica, Afonso Henrique da Silva Júnior, Carlos Rafael Silva de Oliveira, and Francisco Wilson Reichert Júnior. "VALORIZATION AND TREATMENT OF OILY WASTEWATERS FROM AGRO-INDUSTRIES USING LIPASES: AN OVERVIEW." In CONGRESSO INTERNACIONAL DA AGROINDÚSTRIA. Instituto internacional Despertando Vocações, 2020. http://dx.doi.org/10.31692/iciagro.2020.0062.

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