Performance and evaluation of aerobic granular sludge in oily wastewater treatment

被引:5
|
作者
Wang, S. [1 ,2 ]
Yang, Q. Q. [1 ]
Shi, W. X. [3 ]
Yu, S. L. [3 ]
Lv, J. Z. [1 ,2 ]
Li, J. [1 ,2 ]
机构
[1] Jiangnan Univ, Sch Environm & Civil Engn, Jiangsu Key Lab Anaerob Biotechnol, Wuxi 214122, Peoples R China
[2] Jiangsu Coll Water Treatment Technol & Mat Collab, Suzhou 215009, Peoples R China
[3] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
基金
中国国家自然科学基金;
关键词
Aerobic granular sludge; Tightly bound-extracellular polymeric substances; Oily wastewater treatment; Sludge treatment; Heating value; EXTRACELLULAR POLYMERIC SUBSTANCES; ACTIVATED-SLUDGE; INCINERATION; PHENOL; BIODEGRADATION; TECHNOLOGIES; BIOSORPTION; ADSORPTION; MEMBRANES; BALANCE;
D O I
10.5004/dwt.2017.20703
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Oily wastewater treatment through membrane separation is remarkably effective, but the high operation cost and poor resource recovery potential of this method necessitate the application of an integrated physical/chemical-biological oily wastewater treatment. In this study, aerobic granular sludge was applied for oily wastewater treatment from the ultrafiltration (UF) effluent of a two-stage UF-reverse osmosis process. The removal efficiencies of the sludge for oil and chemical oxygen demand reached 94.1% and 85.6%, respectively. The protein concentration of extracellular polymeric substances (EPS) increased to 34.6 mg/g MLSS, and the relatively high protein/polysaccharide ratio was found to be closely related to the formation of aerobic granular sludge. In addition, protein in loosely bound-EPS was converted to tightly bound-EPS (TB-EPS), which indicated that the protein in TB-EPS could be the major factor affecting the granulation process. Separate sludge incineration could be achieved due to the lower heating value of granules was as high as 8.5 MJ/kg. Furthermore, the proposed process could enhance the treatment efficiency of the sludge incinerator and increase the amount of heat energy that could be recycled.
引用
收藏
页码:112 / 118
页数:7
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