Effects of potassium ferrate on extracellular polymeric substances (EPS) and physicochemical properties of excess activated sludge

2012 ◽  
Vol 199-200 ◽  
pp. 158-163 ◽  
Author(s):  
Fenxia Ye ◽  
Xinwen Liu ◽  
Ying Li
Keyword(s):  
Physicochemical Properties ◽  
Activated Sludge ◽  
Extracellular Polymeric Substances ◽  
Potassium Ferrate

A Review on Utilization of Organic Matters in Activated Sludge

2013 ◽  
Vol 773 ◽  
pp. 353-361
Author(s):  
Guang Jie Duan ◽  
Rui Jing Su ◽  
Deng Xin Li
Keyword(s):  
Wastewater Treatment ◽  
Physicochemical Properties ◽  
Activated Sludge ◽  
Extracellular Polymeric Substances ◽  
Land Reclamation ◽  
Chemical Compositions ◽  
Organic Matters ◽  
Treatment Practices ◽  
Treatment And Disposal ◽  
And Function

Activated sludge process has been applied worldwide in municipal and industrial wastewater treatment practices. Excess sewage sludge, produced in sedimentation after wastewater bio-treatment, is an inevitable by-product of wastewater treatment processes. In any case sludge treatment and disposal should always be considered as an integral part of treatment of wastewater. Currently, the most widely available options in the world are the agriculture utilization, the waste disposal sites, the land reclamation and restoration, the incineration and other novel uses. Extracellular polymeric substances (EPS), as high-molecular weight compounds are secreted by activated sludge microorganisms, which can significantly influence the physicochemical properties and function of activated sludge flocs. Because of the crucial roles of EPS, many researchers have been made to explore their chemical compositions and physicochemical properties. Polysaccharides, humic substances and proteins are usually found to be the major components of EPS. The present paper sought to review past and future trends in sludge handling, focusing mainly at the organic matters.

Roles of extracellular polymeric substances (EPS) in the migration and removal of sulfamethazine in activated sludge system

2013 ◽  
Vol 47 (14) ◽  
pp. 5298-5306 ◽  
Author(s):  
Juan Xu ◽  
Guo-Ping Sheng ◽  
Ying Ma ◽  
Long-Fei Wang ◽  
Han-Qing Yu
Keyword(s):  
Activated Sludge ◽  
Extracellular Polymeric Substances ◽  
Activated Sludge System

scholarly journals Isolation, Separation and Identification of the Extracellular Polymeric Substance (EPS) Protein Fraction from the Activated Sludge Floc

2021 ◽  
Author(s):  
Elena Brei
Keyword(s):  
Mass Spectrum ◽  
Activated Sludge ◽  
Extracellular Polymeric Substances ◽  
Current Knowledge ◽  
Noncovalent Interactions ◽  
Detection Methods ◽  
Structure Stability ◽  
Major Protein ◽  
Substantial Portion ◽  
Microbial Flocs

The purpose of this study was to expand the current knowledge of the composition of extracellular polymeric substances (EPS), principally EPS proteins, and their influence on structure, stability and surface chemistry of microbial flocs in activated sludge. It was proposed that a substantial portion of EPS proteins contains glycoproteins or proteins that are strongly bound noncovalently to carbohydrates. Various buffer additives, purification and precipitation methods were employed for protein purification and several glycoprotein detection methods were utilized for glycoprotein detection in the EPS. The proteins were separated with success, with a substantial portion suggesting either a possible glycosylation or strong noncovalent interactions with carbohydrate moiety. An enzyme, oligoendopeptidase F from M3B family was tentatively identified as a major protein present. These results suggest that proteins in the activated sludge EPS may exist in a very intricate arrangement. Furthermore, the EPS peptides may get degraded by naturally present enzymes in the EPS after the protein is digested prior to mass spectrum (MS), making the identification challenging.

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