Effect of Ferric Chloride on the Properties of Biological Sludge in Co-precipitation Phosphorus Removal Process

doi:10.1016/S1004-9541(13)60511-X

Chin.J.Chem.Eng. ›› 2013, Vol. 21 ›› Issue (5): 564-568.DOI: 10.1016/S1004-9541(13)60511-X

• ENERGY, RESOURCES AND ENVIRONMENTAL TECHNOLOGY • Previous Articles Next Articles

Effect of Ferric Chloride on the Properties of Biological Sludge in Co-precipitation Phosphorus Removal Process

ZHANG Zhibin¹, LI Yi¹, WEI Leilei^1,2, LÜ Yufeng¹, WANG Meng¹, GAO Baoyu³

1 School of Environmental and Municipal Engineering, Shandong Jianzhu University, Jinan 250101, China;
2 Everbright Water(Jinan) Limited, Jinan 250032, China;
3 School of Environmental Science and Engineering, Shandong University, Jinan 250000, China

Received:2012-05-11 Revised:2012-12-25 Online:2013-05-31 Published:2013-05-28
Supported by:
Supported by the Major National Water Sci-Tech Projects of China (2009ZX07210-009) and the Department of Environmental Protection of Shandong Province (2006032, 2060403).

Effect of Ferric Chloride on the Properties of Biological Sludge in Co-precipitation Phosphorus Removal Process

张志斌¹, 李艺¹, 魏垒垒^1,2, 吕育锋¹, 王猛¹, 高宝玉³

1 School of Environmental and Municipal Engineering, Shandong Jianzhu University, Jinan 250101, China;
2 Everbright Water(Jinan) Limited, Jinan 250032, China;
3 School of Environmental Science and Engineering, Shandong University, Jinan 250000, China

通讯作者: ZHANG Zhibin
基金资助:
Supported by the Major National Water Sci-Tech Projects of China (2009ZX07210-009) and the Department of Environmental Protection of Shandong Province (2006032, 2060403).

Abstract

Abstract: This paper studied the effect of ferric chloride on waste sludge digestion, dewatering and sedimentation under the optimized doses in co-precipitation phosphorus removal process. The experimental results showed that the concentration of mixed liquid suspended solid (MLSS) was 2436 mg稬^-1 and 2385 mg稬^-1 in co-precipitation phosphorus removal process (CPR) and biological phosphorous removal process (BPR), respectively. The sludge reduction ratio for each process was 22.6% and 24.6% in aerobic digestion, and 27.6% and 29.9% in anaerobic digestion, respectively. Due to the addition of chemical to the end of aeration tank, the sludge content of CPR was slightly higher than that of BPR, but the sludge reduction rate for both processes had no distinct difference. The sludge volume index (SVI) and sludge specific resistance of BPR were 126 ml穏^-1 and 11.7?10¹² m穔g^-1, respectively, while those of CPR were only 98 ml穏^-1 and 7.1?10¹² m穔g^-1, indicating that CPR chemical could improve sludge settling and dewatering.

Key words: biological phosphorous removal process, chemical co-precipitation phosphorus removal process, ferric chloride, municipal wastewater, sludge

摘要： This paper studied the effect of ferric chloride on waste sludge digestion, dewatering and sedimentation under the optimized doses in co-precipitation phosphorus removal process. The experimental results showed that the concentration of mixed liquid suspended solid (MLSS) was 2436 mg稬^-1 and 2385 mg稬^-1 in co-precipitation phosphorus removal process (CPR) and biological phosphorous removal process (BPR), respectively. The sludge reduction ratio for each process was 22.6% and 24.6% in aerobic digestion, and 27.6% and 29.9% in anaerobic digestion, respectively. Due to the addition of chemical to the end of aeration tank, the sludge content of CPR was slightly higher than that of BPR, but the sludge reduction rate for both processes had no distinct difference. The sludge volume index (SVI) and sludge specific resistance of BPR were 126 ml穏^-1 and 11.7?10¹² m穔g^-1, respectively, while those of CPR were only 98 ml穏^-1 and 7.1?10¹² m穔g^-1, indicating that CPR chemical could improve sludge settling and dewatering.

关键词: biological phosphorous removal process, chemical co-precipitation phosphorus removal process, ferric chloride, municipal wastewater, sludge

ZHANG Zhibin, LI Yi, WEI Leilei, LÜ Yufeng, WANG Meng, GAO Baoyu. Effect of Ferric Chloride on the Properties of Biological Sludge in Co-precipitation Phosphorus Removal Process[J]. Chin.J.Chem.Eng., 2013, 21(5): 564-568.

张志斌, 李艺, 魏垒垒, 吕育锋, 王猛, 高宝玉. Effect of Ferric Chloride on the Properties of Biological Sludge in Co-precipitation Phosphorus Removal Process[J]. Chinese Journal of Chemical Engineering, 2013, 21(5): 564-568.

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Effect of Ferric Chloride on the Properties of Biological Sludge in Co-precipitation Phosphorus Removal Process

Effect of Ferric Chloride on the Properties of Biological Sludge in Co-precipitation Phosphorus Removal Process

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