The Experts below are selected from a list of 15999 Experts worldwide ranked by ideXlab platform
Marcelo Zaiat - One of the best experts on this subject based on the ideXlab platform.
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removal of the veterinary antimicrobial sulfamethazine in a horizontal flow Anaerobic immobilized biomass haib reactor subjected to step changes in the applied organic loading rate
Journal of Environmental Management, 2017Co-Authors: G H D Oliveira, Alvaro J Santosneto, Marcelo ZaiatAbstract:Abstract A bench-scale horizontal-flow Anaerobic immobilized biomass (HAIB) reactor treating synthetic swine wastewater was operated under different applied organic loading rates (OLR) through both variations in feed strength and in hydraulic retention time (HRT). The influence of step changes in OLR on the removal of the veterinary antimicrobial sulfamethazine (SMZ) was assessed. The highest observed SMZ removal efficiency, 75 ± 6%, was achieved with an OLR of 2.7 ± 0.4 kg O2 m−3 d−1 when a significant increase in COD removal rate was observed. The SMZ removal rate was positively correlated (r = 0.899) to the COD removal rate in all of the experimental conditions in which the HRT was kept at 24 h, indicating a cometabolic transformation of the antimicrobial. Decreasing the HRT caused a significant decrease in SMZ removal efficiency without affecting the HAIB reactor performance in terms of stability, COD removal or metabolic intermediates production. Functionally equivalent steady states were observed in four different operational phases with similar operating conditions but with widely different behavior in relation to SMZ removal. The experimental results showed the potential of Anaerobic Technology in removing environmentally relevant concentrations of SMZ, and the possibility of enhancing reactor performance by controlling operating conditions.
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Anaerobic Processes as the Core Technology for Sustainable Domestic Wastewater Treatment: Consolidated Applications, New Trends, Perspectives, and Challenges
Reviews in Environmental Science and Bio Technology, 2006Co-Authors: Eugenio Foresti, Marcelo Zaiat, Marcus ValleroAbstract:Anaerobic digesters have been responsible for the removal of large fraction of organic matter (mineralization of waste sludge) in conventional aerobic sewage treatment plants since the early years of domestic sewage treatment (DST). Attention on the Anaerobic Technology for improving the sustainability of sewage treatment has been paid mainly after the energy crisis in the 1970s. The successful use of Anaerobic reactors (especially up-flow Anaerobic sludge blanket (UASB) reactors) for the treatment of raw domestic sewage in tropical and sub-tropical regions (where ambient temperatures are not restrictive for Anaerobic digestion) opened the opportunity to substitute the aerobic processes for the Anaerobic Technology in removal of the influent organic matter. Despite the success, effluents from Anaerobic reactors treating domestic sewage require post-treatment in order to achieve the emission standards prevailing in most countries. Initially, the composition of this effluent rich in reduced compounds has required the adoption of post-treatment (mainly aerobic) systems able to remove the undesirable constituents. Currently, however, a wealth of information obtained on biological and physical-chemical processes related to the recovery or removal of nitrogen, phosphorus and sulfur compounds creates the opportunity for new treatment systems. The design of DST plant with the Anaerobic reactor as core unit coupled to the pre- and post-treatment systems in order to promote the recovery of resources and the polishing of effluent quality can improve the sustainability of treatment systems. This paper presents a broader view on the possible applications of Anaerobic treatment systems not only for organic matter removal but also for resources recovery aiming at the improvement of the sustainability of DST.
Du Jin - One of the best experts on this subject based on the ideXlab platform.
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Anaerobic Technology of wastewater treatment for large scale swine farm and the problems
Renewable Energy, 2006Co-Authors: Du JinAbstract:Animal wastewater from large scale farm can do great harm to its environment because of its character.Various Anaerobic treating processes for the swine manure were analyzed as the reference to the operation of large scale swine farm in nowadays.A conclusion was drawn that subsequent process should be combined with Anaerobic Technology and ecotypic agricultural treating system appears to be a promising solution.
Marcus Vallero - One of the best experts on this subject based on the ideXlab platform.
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Anaerobic Processes as the Core Technology for Sustainable Domestic Wastewater Treatment: Consolidated Applications, New Trends, Perspectives, and Challenges
Reviews in Environmental Science and Bio Technology, 2006Co-Authors: Eugenio Foresti, Marcelo Zaiat, Marcus ValleroAbstract:Anaerobic digesters have been responsible for the removal of large fraction of organic matter (mineralization of waste sludge) in conventional aerobic sewage treatment plants since the early years of domestic sewage treatment (DST). Attention on the Anaerobic Technology for improving the sustainability of sewage treatment has been paid mainly after the energy crisis in the 1970s. The successful use of Anaerobic reactors (especially up-flow Anaerobic sludge blanket (UASB) reactors) for the treatment of raw domestic sewage in tropical and sub-tropical regions (where ambient temperatures are not restrictive for Anaerobic digestion) opened the opportunity to substitute the aerobic processes for the Anaerobic Technology in removal of the influent organic matter. Despite the success, effluents from Anaerobic reactors treating domestic sewage require post-treatment in order to achieve the emission standards prevailing in most countries. Initially, the composition of this effluent rich in reduced compounds has required the adoption of post-treatment (mainly aerobic) systems able to remove the undesirable constituents. Currently, however, a wealth of information obtained on biological and physical-chemical processes related to the recovery or removal of nitrogen, phosphorus and sulfur compounds creates the opportunity for new treatment systems. The design of DST plant with the Anaerobic reactor as core unit coupled to the pre- and post-treatment systems in order to promote the recovery of resources and the polishing of effluent quality can improve the sustainability of treatment systems. This paper presents a broader view on the possible applications of Anaerobic treatment systems not only for organic matter removal but also for resources recovery aiming at the improvement of the sustainability of DST.
Eugenio Foresti - One of the best experts on this subject based on the ideXlab platform.
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Anaerobic Processes as the Core Technology for Sustainable Domestic Wastewater Treatment: Consolidated Applications, New Trends, Perspectives, and Challenges
Reviews in Environmental Science and Bio Technology, 2006Co-Authors: Eugenio Foresti, Marcelo Zaiat, Marcus ValleroAbstract:Anaerobic digesters have been responsible for the removal of large fraction of organic matter (mineralization of waste sludge) in conventional aerobic sewage treatment plants since the early years of domestic sewage treatment (DST). Attention on the Anaerobic Technology for improving the sustainability of sewage treatment has been paid mainly after the energy crisis in the 1970s. The successful use of Anaerobic reactors (especially up-flow Anaerobic sludge blanket (UASB) reactors) for the treatment of raw domestic sewage in tropical and sub-tropical regions (where ambient temperatures are not restrictive for Anaerobic digestion) opened the opportunity to substitute the aerobic processes for the Anaerobic Technology in removal of the influent organic matter. Despite the success, effluents from Anaerobic reactors treating domestic sewage require post-treatment in order to achieve the emission standards prevailing in most countries. Initially, the composition of this effluent rich in reduced compounds has required the adoption of post-treatment (mainly aerobic) systems able to remove the undesirable constituents. Currently, however, a wealth of information obtained on biological and physical-chemical processes related to the recovery or removal of nitrogen, phosphorus and sulfur compounds creates the opportunity for new treatment systems. The design of DST plant with the Anaerobic reactor as core unit coupled to the pre- and post-treatment systems in order to promote the recovery of resources and the polishing of effluent quality can improve the sustainability of treatment systems. This paper presents a broader view on the possible applications of Anaerobic treatment systems not only for organic matter removal but also for resources recovery aiming at the improvement of the sustainability of DST.
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Perspectives on Anaerobic treatment in developing countries
Water science and technology : a journal of the International Association on Water Pollution Research, 2001Co-Authors: Eugenio ForestiAbstract:Developing countries occupy regions where the climate is warm most of the time. Even in sub-tropical areas, low temperatures do not persist for long periods. This is the main factor that makes the use of Anaerobic Technology applicable and less expensive, even for the treatment of low-strength industrial wastewaters and domestic sewage. Based mainly on papers presented at the ‘VI Latin-American Workshop and Seminar on Anaerobic Digestion’ held in Recife, Brazil, in November 2000, this text approaches the perspectives of Anaerobic treatment of wastewaters in developing countries. Emphasis is given to domestic sewage treatment and to the use of compact systems in which sequential batch reactors (SBR) or dissolved-air flotation (DAF) systems are applied for the post-treatment of Anaerobic reactor effluents. Experiments on bench- and pilot-plants have indicated that these systems can achieve high performance in removing organic matter and nutrients during the treatment of domestic sewage at ambient temperatures.
Peter Weiland - One of the best experts on this subject based on the ideXlab platform.
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Anaerobic waste digestion in Germany – Status and recent developments
Biodegradation, 2000Co-Authors: Peter WeilandAbstract:Anaerobic treatment processes are especially suited for the utilization of wet organic wastes from agriculture and industry as well as for the organic part of source-separated household wastes. The Anaerobic degradation is a very cost-effective method for treating biogenic wastes because the formed biogas can be used for heat and electricity production and the digester residues can be recycled to agriculture as a secondary fertilizer. The Anaerobic Technology will be used today also for the common treatment of wastes together with renewable energy crops in order to reduce the CO_2-emissions according the Kyoto protocol. Various process types are applied in Germany which differ in material, reaction conditions and in the form of the used reactor systems. The widespread introduction of Anaerobic digestion in Germany has shown that biogenic organic wastes are a valuable source for energy and nutrients. Anaerobic waste treatment is done today in approx. 850 biogas plants on small farm scale as well as on large industrial scale with the best beneficial and economic outcome. Due to some new environmental protection acts which promote the recycling of wastes and their utilization for renewable energy formation it can be expected that several hundreds new biogas plants will be built per year in Germany. For using the synergetic effects of a combined fermentation of wastes and energy crops new process types must be developed in order to optimize the substrate combinations and the process conditions for maximum biodegradation.