Modeling assessment for ammonium nitrogen recovery from wastewater by chemical precipitation

作     者：Tao Zhang Qiucheng Li Lili Ding Hongqiang Ren Ke Xu Yonggang Wu Dong Sheng 

作者机构：State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210093 China Modern Analysis Center Nanjing University Nanjing 210093 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2011年第23卷第6期

页      面：881-890页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081703[工学-生物化工] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0836[工学-生物工程] 0702[理学-物理学] 

基　　金：supported by the National High Technology Research and Development Program(863) of China(No.2009AA033003) the National Water Pollution Control and Management Science and Technology Breakthrough Program(No.2009ZX07106-004) the Scientific Research Foundation of Graduate School of Jiangsu Province(No.CX09B 013Z) the Key Technology Research and Development Program of Jiangsu Province (No.BE2008668) the Ph.D Candidate Academic Foundation of Ministry of Education of China 

主　　题：ammonium nitrogen magnesium ammonium phosphate PHREEQC program response surface methodology 

摘      要：Chemical precipitation to form magnesium ammonium phosphate（MAP） is an effective technology for recovering ammonium nitrogen（NH4＋-N）.In the present research,we investigated the thermodynamic modeling of the PHREEQC program for NH4＋-N recovery to evaluate the effect of reaction factors on MAP *** case study of NH4＋-N recovery from coking wastewater was conducted to provide a *** surface methodology（RSM） was applied to assist in understanding the relative significance of reaction factors and the interactive effects of solution *** modeling indicated that the saturation index（SI） of MAP followed a polynomial function of *** SI of MAP increased logarithmically with the Mg2＋/NH4＋ molar ratio（Mg/N） and the initial NH4＋-N concentration（CN）,respectively,while it decreased with an increase in Ca2＋/NH4＋ and CO32？/NH4＋ molar ratios（Ca/N and CO32？/N）,*** trends for NH4＋-N removal at different pH and Mg/N levels were similar to the thermodynamic modeling *** RSM analysis indicated that the factors including pH,Mg/N,CN,Ca/N,（Mg/N）×（CO32？/N）,（pH）2,（Mg/N）2,and（CN）2 were *** surface plots were useful for understanding the interaction effects on NH4＋-N recovery.