Sludge conditioning using biogenic flocculant produced by Acidithiobacillus ferrooxidans for enhancement in dewaterability

被引：29
作者：
Kurade, Mayur B. [1 ]
Murugesan, Kumarasamy [1 ,3 ]
Selvam, Ammaiyappan [1 ,2 ]
Yu, Shuk-Man
Wong, Jonathan W. C. [1 ,2 ]
机构：
[1] Hong Kong Baptist Univ, Sinoforest Appl Res Ctr Pearl River Delta Environ, Hong Kong, Hong Kong, Peoples R China
[2] Hong Kong Baptist Univ, Dept Biol, Kowloon Tong, Hong Kong, Peoples R China
[3] Periyar Univ, Dept Environm Sci, Salem 636011, India
来源：
BIORESOURCE TECHNOLOGY | 2016年 / 217卷
关键词：
Biogenic flocculant; Acidithiobacillus ferrooxidans; Sludge dewaterability; Sewage sludge; Bioflocculation; DIGESTED SEWAGE-SLUDGE; SULFUR-OXIDIZING BACTERIA; POLYMERIC SUBSTANCES EPS; WASTE ACTIVATED-SLUDGE; HEAVY-METALS; OPTIMIZATION; PRETREATMENT; BIOSOLIDS; AERATION; DOSAGE;
D O I：
10.1016/j.biortech.2016.02.113
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Biogenic flocculant produced by Acidithiobacillus ferrooxidans was used for sludge conditioning to improve the dewaterability of anaerobically-digested sludge, and its efficiency was compared with commercial cationic polyacrylamide (PAM). Biogenic flocculant rapidly reduced the pH and increased the oxidation-reduction potential of sludge. Capillary suction time (CST) and specific resistant to filtration (SRF) of sludge was decreased by 74% and 89%, respectively, compared with control; and the reductions were 58% CST and 67% SRF higher when compared with commercial polymer. Biogenic treatment improved the sludge calorific value by 13%, and also reduced the unpleasant odor. The small-scale mechanical filter press study showed that the biogenic flocculant can reduce the moisture content of sludge to 70%, and improve the clarity of the filtrate in terms of removal of total suspended solids and total dissolved solids when compared with synthetic polymer treatment. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：179 / 185
页数：7
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