Journal ArticleDOI
Cometabolic degradation of organic wastewater micropollutants by activated sludge and sludge-inherent microorganisms
Klaus Fischer,Marius Majewsky +1 more
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TLDR
This minireview summarizes current knowledge about the cometabolic degradation of organic trace pollutants by activated sludge and sludge-inherent microorganisms and focuses on pharmaceuticals, personal care products, antibiotics, estrogens, and nonylphenols.Abstract:
Municipal wastewaters contain a multitude of organic trace pollutants. Often, their biodegradability by activated sludge microorganisms is decisive for their elimination during wastewater treatment. Since the amounts of micropollutants seem too low to serve as growth substrate, cometabolism is supposed to be the dominating biodegradation process. Nevertheless, as many biodegradation studies were performed without the intention to discriminate between metabolic and cometabolic processes, the specific contribution of the latter to substance transformations is often not clarified. This minireview summarizes current knowledge about the cometabolic degradation of organic trace pollutants by activated sludge and sludge-inherent microorganisms. Due to their relevance for communal wastewater contamination, the focus is laid on pharmaceuticals, personal care products, antibiotics, estrogens, and nonylphenols. Wherever possible, reference is made to the molecular process level, i.e., cometabolic pathways, involved enzymes, and formed transformation products. Particular cometabolic capabilities of different activated sludge consortia and various microbial species are highlighted. Process conditions favoring cometabolic activities are emphasized. Finally, knowledge gaps are identified, and research perspectives are outlined.read more
Citations
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From the conventional biological wastewater treatment to hybrid processes, the evaluation of organic micropollutant removal: A review.
Camille Grandclement,Isabelle Seyssiecq,Anne Piram,Pascal Wong-Wah-Chung,Guillaume Vanot,Nicolas Tiliacos,Nicolas Roche,Pierre Doumenq +7 more
TL;DR: Even though some hybrid processes show promising micropollutant removals, further studies are needed to optimize these water treatment processes, in particular in terms of technical and economical competitiveness.
Journal ArticleDOI
A critical review on antibiotics and hormones in swine wastewater: Water pollution problems and control approaches
Dongle Cheng,Huu Hao Ngo,Wenshan Guo,Soon Woong Chang,Dinh Duc Nguyen,Yiwen Liu,Qin Wei,Dong Wei +7 more
TL;DR: The development of antibiotic alternatives and the enhanced implementation of vaccination and biosecurity are promising management approaches to cut down the consumption of antibiotics during swine production and the combined system of bioprocesses and AOPs is expected to be a promising technology for elimination and mineralization of A&H in swine wastewater.
Journal ArticleDOI
A review of the fate of micropollutants in wastewater treatment plants
TL;DR: In this article, the sources, the typical concentrations and the fate of more than 160 micropollutants of various classes in conventional WWTPs were investigated in order to estimate surface water contamination, risks for aquatic organisms, and to propose means to reduce their release into the environment.
Journal ArticleDOI
Spoilt for choice: A critical review on the chemical and biological assessment of current wastewater treatment technologies.
TL;DR: This review summarizes the current approaches used to assess treated wastewater quality from the chemical and ecotoxicological perspective and critically discusses the benefits and limitations of the different methodologies reviewed.
Journal ArticleDOI
Anaerobic biodegradation of (emerging) organic contaminants in the aquatic environment.
TL;DR: This review provides a comprehensive survey of characteristic anaerobic biotransformation reactions for a variety of well-studied, structurally rather simple contaminants (SMOCs) bearing one or a few different functional groups/structural moieties.
References
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Enzyme Promiscuity: A Mechanistic and Evolutionary Perspective
Olga Khersonsky,Dan S. Tawfik +1 more
TL;DR: The hypothesis that promiscuous enzymatic activities serve as evolutionary starting points and highlight the unique evolutionary features ofpromiscuous enzyme functions are addressed.
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Triclosan: Occurrence and fate of a widely used biocide in the aquatic environment: Field measurements in wastewater treatment plants, surface waters, and lake sediments
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Quinone chemistry and toxicity
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Enzyme promiscuity : mechanism and applications
Karl Hult,Per Berglund +1 more
TL;DR: Enzyme condition promiscuity has, for a long time, been used to run reactions under conditions of low water activity that favor ester synthesis instead of hydrolysis and has begun to be recognized as a valuable research and synthesis tool.