Title: Role of extracellular polymeric substances and enhanced performance for biological removal of carbonaceous organic matters and ammonia from wastewater with high salinity and low nutrient concentrations
Abstract: The role of EPS in removal of carbonaceous organic matters and NH4+-N in simulated mariculture wastewater was examined at salinity of 0–3.5% in a multi-soil-layering bioreactor. Results showed that at 3.5% of salinity, the total activity of dehydrogenases (which were used to decompose carbonaceous organic matters) could be promoted by 13.2%–33.8% by EPS, increasing the removal rates of COD and NH4+-N by 13.2%–33.8% and 27.8%–42.1%, respectively. Besides, the activity of amylase in EPS was enhanced by 79.8%. However, reactions of some key enzymes such as acetate kinase and Na+K+-ATPase would not be accelerated by EPS, resulting in an inhibition of 44.3%–57.7% on energy gaining from ATP, and further inducing cytotoxicity. It was found that the glycolysis efficiency was promoted by 4.12%–59.3% in the presence of EPS, and glycolysis could also occur in EPS. Additionally, tyrosine was the main component in EPS to balance osmotic pressure.
Publication Year: 2021
Publication Date: 2021-01-22
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 32
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