Experimental study of ammonia removal from Water by modified direct contact membrane distillation

被引：93

作者：

Qu, Dan ^{[1
]}

Sun, Diyang ^{[1
]}

Wang, Hongjie ^{[1
]}

Yun, Yanbin ^{[1
]}

机构：

[1] Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing 100083, Peoples R China

来源：

DESALINATION | 2013年 / 326卷

基金：

美国国家科学基金会;

关键词：

Modified direct contact membrane distillation; Ammonia removal; PVDF membrane; Ammonia mass transfer coefficient; MASS-TRANSFER; WASTE-WATER; ION-EXCHANGE; HOLLOW; NITRIFICATION; SIMULATION; STREAMS;

D O I：

10.1016/j.desal.2013.07.021

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this work, a modified direct contact membrane distillation (MDCMD) with receiving solution in permeate was developed for accelerating ammonia removal from aqueous solution. The ammonia removal efficiency by means of DCMD, hollow fiber membrane contactor (HFMC) and MDCMD was comparatively investigated. And the effect of feed pH, temperature, flow rate and concentration on ammonia removal efficiency and the permeate flux in MDCMD process was studied. Experimental results showed that the ammonia removal efficiency of DCMD, HMC and MDCMD was 52%, 88% and 99.5% within 105 min, respectively. In MDCMD, feed pH value was proved to be the most dominant factor and the optimal feed pH was 12.20. Increasing feed temperature and flow rate led to higher ammonia mass transfer coefficient, ammonia removal efficiency and permeate flux within the range studied. The initial ammonia concentration had a negligible effect on ammonia removal efficiency. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：135 / 140

页数：6

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