Enhanced dewaterability of anaerobically digested sewage sludge using Acidithiobacillus ferrooxidans culture as sludge conditioner

被引：38

作者：

Murugesan, Kumarasamy ^{[1
]}

Ravindran, Balasubramani ^{[1
]}

Selvam, Ammaiyappan ^{[1
]}

Kurade, Mayur B. ^{[1
]}

Yu, Shuk-Man ^{[1
]}

Wong, Jonathan W. C. ^{[1
]}

机构：

[1] Hong Kong Baptist Univ, Dept Biol, Sino Forest Appl Res Ctr Pearl River Delta Enviro, Kowloon Tong, Hong Kong, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 169卷

关键词：

Acidithiobacillus ferrooxidans; Anaerobically digested sewage sludge; Sludge conditioning; Sludge dewaterability; EXTRACELLULAR POLYMERIC SUBSTANCES; ACTIVATED-SLUDGE; HEAVY-METALS; INHIBITORY SUBSTANCES; OXIDIZING BACTERIA; FERRIC SULFATE; EPS; FLOCCULATION; REMOVAL; IDENTIFICATION;

D O I：

10.1016/j.biortech.2014.06.057

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Role of Acidithiobacillus ferrooxidans culture in bioacidification and dewaterability of anaerobically digested sewage sludge (ADS) was investigated. A. ferrooxidans culture grown in 9K medium along with Fe2+ produced iron flocculant containing, secondary iron minerals and biopolymeric substances as confirmed by FT-IR, XRD, and SEM-EDX. Bioacidification of ADS was performed using 10% (v/v) A. ferrooxidans culture, isolated cells and cell-free culture filtrate; and dewaterability was assessed using the capillary suction time (CST) and specific resistance to filtration (SRF). Isolated bacterial cells significantly (P < 0.05) reduced the sludge dewaterability when supplemented with Fe2+ while the whole culture and cell-free filtrate rapidly acidified the sludge without Fe2+ and showed significant reduction of CST (71.3-73.5%) and SRF ( 84-88%). Results clearly indicated that the culture and filtrate of the A. ferrooxidans facilitated rapid sludge dewaterability while the cells supplemented with Fe2+ also enhanced dewaterability but required 2-4 days. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：374 / 379

页数：6

共 35 条

[1] Role of ferric ions in bioleaching of uranium from low tenor Indian ore [J].