pH dependent phosphorus release from waste activated sludge: contributions of phosphorus speciation

被引：176
|
作者：
Xu, Yunfeng [1 ]
Hu, Hui [1 ]
Liu, Jianyong [1 ]
Luo, Jinghuan [1 ]
Qian, Guangren [1 ]
Wang, Aijie [2 ]
机构：
[1] Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China
[2] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2015年 / 267卷
基金：
中国国家自然科学基金;
关键词：
Phosphorus speciation; Release; Waste activated sludge; pH dependent; SMT protocol; SEWAGE-SLUDGE; HARMONIZED PROTOCOL; LOWER REACHES; TAIHU LAKE; SEDIMENTS; FRACTIONS; CHINA; SOIL; HYDROLYSIS; RECOVERY;
D O I：
10.1016/j.cej.2015.01.037
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
For phosphorus (P) recovery from waste activated sludge (WAS), the most important step is to release P into the solution, which is greatly dependent on the pH of the solution. The contributions of different P speciation to P release amount from WAS as well as P release kinetics were investigated at different pHs, with the Standards Measurements and Testing (SMT) protocol being used for P fractions tests. The results showed that the total P in the solid (TP(s)) release percentages were 36.2% and 12.4% at pH = 2.0 and pH = 11.0, respectively. P speciation and fractions study made clear that the released P comes mainly from dissolving of inorganic P (IP) under acid condition, but from non-apatite inorganic P (NAIP) and organic P (OP) under alkaline condition. Simulation study using Visual MINTEQ indicated that the P release amount came from the experimental results is unanimous. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：260 / 265
页数：6
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