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

页码：260 / 265

页数：6

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