Back to Search
Start Over
Roles of ammonia-oxidizing bacteria in improving metabolism and cometabolism of trace organic chemicals in biological wastewater treatment processes: A review
- Source :
- Science of The Total Environment. 659:419-441
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- While there has been a significant recent improvement in the removal of pollutants in natural and engineered systems, trace organic chemicals (TrOCs) are posing a major threat to aquatic environments and human health. There is a critical need for developing potential strategies that aim at enhancing metabolism and/or cometabolism of these compounds. Recently, knowledge regarding biodegradation of TrOCs by ammonia-oxidizing bacteria (AOB) has been widely developed. This review aims to delineate an up-to-date version of the ecophysiology of AOB and outline current knowledge related to biodegradation efficiencies of the frequently reported TrOCs by AOB. The paper also provides an insight into biodegradation pathways by AOB and transformation products of these compounds and makes recommendations for future research of AOB. In brief, nitrifying WWTFs (wastewater treatment facilities) were superior in degrading most TrOCs than non-nitrifying WWTFs due to cometabolic biodegradation by the AOB. To fully understand and/or enhance the cometabolic biodegradation of TrOCs by AOB, recent molecular research has focused on numerous crucial factors including availability of the compounds to AOB, presence of growth substrate (NH4-N), redox potentials, microorganism diversity (AOB and heterotrophs), physicochemical properties and operational parameters of the WWTFs, molecular structure of target TrOCs and membrane-based technologies, may all significantly impact the cometabolic biodegradation of TrOCs. Still, further exploration is required to elucidate the mechanisms involved in biodegradation of TrOCs by AOB and the toxicity levels of formed products.
- Subjects :
- Environmental Engineering
010504 meteorology & atmospheric sciences
Microorganism
Heterotroph
Cometabolism
Wastewater
010501 environmental sciences
Waste Disposal, Fluid
01 natural sciences
chemistry.chemical_compound
Ammonia
Environmental Chemistry
Organic Chemicals
Waste Management and Disposal
0105 earth and related environmental sciences
Pollutant
Bacteria
Chemistry
Metabolism
Biodegradation
Pollution
Biodegradation, Environmental
Activated sludge
Environmental chemistry
Sewage treatment
Oxidation-Reduction
Water Pollutants, Chemical
Subjects
Details
- ISSN :
- 00489697
- Volume :
- 659
- Database :
- OpenAIRE
- Journal :
- Science of The Total Environment
- Accession number :
- edsair.doi.dedup.....979cd176bd0e367de127547ccbbf4918