Use of solid phosphorus fractionation data to evaluate phosphorus release from waste activated sludge

被引：40

作者：

Pokhrel, S. P. ^{[1
]}

Milke, M. W. ^{[1
]}

Bello-Mendoza, R. ^{[1
]}

Buitron, G. ^{[2
]}

Thiele, J. ^{[3
]}

机构：

[1] Univ Canterbury, Dept Civil & Nat Resources Engn, Private Bag 4800, Christchurch 8140, New Zealand

[2] Univ Nacl Autonoma Mexico, Unidad Acad Juriquilla, Inst Ingn, Lab Res Adv Proc Water Treatment, Blvd Juriquilla 3001, Queretaro 76230, Mexico

[3] Calibre Consulting, 323 Madras St, Christchurch 8013, New Zealand

来源：

WASTE MANAGEMENT | 2018年 / 76卷

关键词：

Phosphorus recovery; Phosphorus release; Sludge fermentation; Secondary treatment sludge; Polyphosphates; ANAEROBIC-DIGESTION; WATER INTERFACE; SEWAGE-SLUDGE; LOW PH; SEDIMENT; TEMPERATURE; LAKE; RECOVERY; REMOVAL; OXYGEN;

D O I：

10.1016/j.wasman.2018.03.008

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Waste activated sludge (WAS) can become an important source of phosphorus (P). P speciation was examined under anaerobic conditions, with different pH (4, 6 and 8) and temperatures (10, 20 and 35 degrees C). Aqueous P was measured and an extraction protocol was used to find three solid phosphorus fractions. A pH of 4 and a temperature of 35 degrees C gave a maximum of 51% of total P solubilized in 22 days with 50% of total P solubilized in 7 days. Batch tests indicate that little pH depression is needed to release non apatite inorganic P (including microbial polyphosphate), while a pH of 4 rather than 6 will release more apatite inorganic P, and that organic P is relatively more difficult to release from WAS. Fractionation analysis of P in WAS can aid in design of more efficient methods for P recovery from WAS. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：90 / 97

页数：8

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