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　WANGXue-ke,ZHANGChun-miao,LICai-ran,et al.Recovery of Aluminum in Sludge from High Efficiency Sedimentation Tank by Acidification Method and Its Phosphorus Removal Performance[J].China Water & Wastewater,2023,39(21):94-98.
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酸化法回收高效沉淀池污泥中的铝及其除磷效能

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第39卷 期数: 2023年第21期 页码: 94-98 栏目: 出版日期: 2023-11-01
Title:
Recovery of Aluminum in Sludge from High Efficiency Sedimentation Tank by Acidification Method and Its Phosphorus Removal Performance
作者:
王学科1,2， 张春苗1， 李彩然1， 赵子汇1， 汪诚文2
（1.天津壹新环保工程有限公司，天津 300403；2.清华大学 环境学院，北京 100084）
Author(s):
WANG　Xue-ke1，2， ZHANG　Chun-miao1， LI　Cai-ran1， ZHAO　Zi-hui1， WANG　Cheng-wen2
（1. Tianjin Raising Environmental Protection Engineering Co. Ltd.， Tianjin 300403， China； 2. School of Environment， Tsinghua University， Beijing 100084， China）
关键词:
高效沉淀池污泥;  酸化法;  铝回收;  除磷
Keywords:
sludge from high efficiency sedimentation tank;  acidification method;  recovery of aluminum;  phosphorus removal
摘要:
为提高铝的回收率，从高效沉淀池污泥的特点出发，采用酸化法浸出高浓度的铝进行回收利用。探究了pH、反应时间对铝浸出浓度的影响，并利用高浓度铝回收液作为除磷药剂考察其对污水中磷的去除效果。结果表明，酸化pH越低，铝浸出浓度越高；当酸化30 min时，反应基本完成，后续铝浸出浓度基本不变；回收液中铝浓度可高达3 000 mg/L，当其添加量为2.0%时，对污水中磷的去除效果显著，去除率可达86.3%。对铝进行回收可以减少污水厂中聚合氯化铝（PAC）的投加量，降低污水厂的实际运行成本。
Abstract:
High-concentration aluminum was leached and recovered by acidification method according to the characteristics of sludge from high efficiency sedimentation tank, so as to improve the recovery rate of aluminum. The effects of pH and reaction time on the leaching concentration of aluminum were investigated, and the removal performance of phosphorus from wastewater was explored by using the recovered high-concentration aluminum liquid as the phosphorus removal agent. The aluminum leaching concentration increased with the decrease of acidification pH. After acidification for 30 min, the reaction was basically completed, and the subsequent leaching concentration of aluminum tended to be stable. The concentration of aluminum in the recovered liquid was as high as 3 000 mg/L. When the dosage of the recovered liquid was 2.0%, the removal performance of phosphorus in wastewater was remarkable, and the removal rate reached 86.3%. The recovery of aluminum can decrease the dosage of polymeric aluminum chloride （PAC） in the wastewater treatment plant and reduce its operating cost.
更新日期/Last Update: 2023-11-01