Adsorbent made from CEPT sludge in wastewater enhanced treatment  

作　　者：许国仁 张为堂 孙丽欣 

机构地区：[1]School of Municipal and Environmental Engineering Harbin Institute of Technology, Harbin 150090, China

出　　处：《Journal of Harbin Institute of Technology(New Series)》2005年第3期271-274,共4页哈尔滨工业大学学报（英文版）

摘　　要：The potential application of adsorbents made from CEPT sludge in municipal wastewater treatment was investigated under various conditions, such as the adsorbent dosage, pH, and the different dosing order modes of ferric chloride and the adsorbent. The adsorbent obtained from sludge contributes to sludge disposal, while reducing the fresh ferric chloride dosage. The enhanced removal efficiencies of turbidity, UV(254), COD, total phosphorus (TP) are 90.48%,77.80%,50.62% and 96.33% respectively when 3 g/L of the sludge-adsorbent was used in the coagulation process. The maximum adsorption capacity (Q°) of the sludge-adsorbent for COD was over 184.52 mg/gand that for TP was 4.98 mg/gadsorbent optimally as the dosage of the adsorbent was 0.6 g/L. When 10 mg/L of ferric chloride and 0.6 g/L of the adsorbent were used at the first stage simultaneously, the enhanced removal efficiencies of turbidity, UV(254), COD, TP were 83.33%,52.30%,48.84% and 88.96% respectively. The pH value in the raw water played a significant role in the coagulation and adsorption process. The optimum pH value was between 4 and 11.The potential application of adsorbents made from CEPT sludge in municipal wastewater treatment was investigated under various conditions, such as the adsorbent dosage, pH, and the different dosing order modes of ferric chloride and the adsorbent. The adsorbent obtained from sludge contributes to sludge disposal, while reducing the fresh ferric chloride dosage. The enhanced removal efficiencies of turbidity, UV(254), COD, total phosphorus (TP) are 90.48%,77.80%,50.62% and 96.33% respectively when 3 g/L of the sludge-adsorbent was used in the coagulation process. The maximum adsorption capacity (Q°) of the sludge-adsorbent for COD was over 184.52 mg/gand that for TP was 4.98 mg/gadsorbent optimally as the dosage of the adsorbent was 0.6 g/L. When 10 mg/L of ferric chloride and 0.6 g/L of the adsorbent were used at the first stage simultaneously, the enhanced removal efficiencies of turbidity, UV(254), COD, TP were 83.33%,52.30%,48.84% and 88.96% respectively. The pH value in the raw water played a significant role in the coagulation and adsorption process. The optimum pH value was between 4 and 11.

关 键 词：CEPT ADSORBENT SLUDGE chemical activation COAGULATION 

分 类 号：X703[环境科学与工程—环境工程]