Response of extracellular polymeric substances and enzymatic activity to salinity for the waste activated sludge anaerobic fermentation process
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Salinity (NaCl) was used in waste activated sludge (WAS) anaerobic fermentation system which had been presented to greatly enhance the extracellular polymeric substance (EPS) production including protein and polysaccharide and short-chain fatty acids (SCFAs). Salinity enhanced soluble protein and polysaccharide (SB-EPS) release which was 4.04 times (protein) and 1.83 times (polysaccharide) compared to 0 g/L NaCl level. More important, salinity restrained the coenzyme 420 activity (F420), but increased the hydrolase activity. Abundant hydrolysis of substrate and highly active hydrolase led to abundant SCFA production. Pearson correlation coefficient showed that the protein became the main reaction substrate for SCFA generation.
KeywordsWaste activated sludge Salinity Extracellular polymeric substances Biological enzyme
The authors are grateful to the doctoral foundation and incubation project of Zhengzhou University of Light Industry (13501050052, 2018ZCKJ201), also supported by the foundation of Henan province natural science (182300410140).
- 1.Association C, Washington D (1995) Standard methods for the examination of water and wastewater. Am Phys Educ Rev 24(9):481–486Google Scholar