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Marcelo Zaiat – One of the best experts on this subject based on the ideXlab platform.

  • 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, 2017
    Co-Authors: G H D Oliveira, Alvaro J Santosneto, Marcelo Zaiat

    Abstract:

    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, 2006
    Co-Authors: Eugenio Foresti, Marcelo Zaiat, Marcus Vallero

    Abstract:

    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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Du Jin – One of the best experts on this subject based on the ideXlab platform.

  • Anaerobic Technology of wastewater treatment for large scale swine farm and the problems
    Renewable Energy, 2006
    Co-Authors: Du Jin

    Abstract:

    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.

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Marcus Vallero – One of the best experts on this subject based on the ideXlab platform.

  • 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, 2006
    Co-Authors: Eugenio Foresti, Marcelo Zaiat, Marcus Vallero

    Abstract:

    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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