SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (5): 564-568.DOI: 10.1016/S1004-9541(13)60511-X

• 能源、资源与环境技术 • 上一篇    下一篇

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. 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
  • 收稿日期:2012-05-11 修回日期:2012-12-25 出版日期:2013-05-28 发布日期:2013-05-31
  • 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).

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

ZHANG Zhibin1, LI Yi1, WEI Leilei1,2, LÜ Yufeng1, WANG Meng1, GAO Baoyu3   

  1. 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:2013-05-28 Published:2013-05-31
  • 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).

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

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