Predicting struvite formation in digestion

被引：361

作者：

Ohlinger, KN

Young, TM

Schroeder, ED

机构：

[1] Univ Calif Davis, Dept Civil & Environm Engn, Davis, CA 95616 USA

[2] Sacramento Reg Cty Sanitat Dist, Elk Grove, CA 95758 USA

来源：

WATER RESEARCH | 1998年 / 32卷 / 12期

关键词：

D O I：

10.1016/S0043-1354(98)00123-7

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The solubility constant for struvite (MgNH4PO4. 6H(2)O) was measured in formation and;dissolution equilibrium experiments. The proposed solubility constant (pK(SO) = 13.26) accurately predicted struvite precipitation in sludge handling facilities at the Sacramento Regional Wastewater Treatment Plant, whereas the solubility constant in common use did not. An improved method was developed for predicting struvite precipitation potential in anaerobic digestion and post-digestion processes. Method improvements include consideration of ionic strength effects on ion activities, magnesium phosphate complexation effects on ion speciation, and an experimentally derived struvite solubility constant. The improved method accurately predicted struvite to be less soluble than predicted by earlier methods. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：3607 / 3614

页数：8

共 30 条

[1] MAGNESIUM AMMONIUM PHOSPHATES RELATED SALTS AND THEIR BEHAVIOR IN COMPOUND FERTILIZERS [J].