文献类型：期刊文献

中文题名：活性污泥处理含氰废水毒性及降解机制研究

英文题名：Research on Cyanide Toxicity and Its Degradation Mechanism by Activated Sludge

作者：张利华[1];周珉[2];瞿贤[2];张海涛[1]

机构：[1]华东理工大学化工学院,上海200237;[2]上海化学工业区中法水务发展有限公司,上海201507

年份：2015

卷号：34

期号：2

起止页码：149

中文期刊名：湿法冶金

外文期刊名：Hydrometallurgy of China

收录：北大核心:【北大核心2014】；

语种：中文

中文关键词：含氰废水;活性污泥;微生物;硝化毒性;反硝化毒性

外文关键词：cyanide wastewater ; activated sludge ; microbes ; nitrification toxicity ; denitrification toxicity

摘要：研究了不同浓度含氰废水对微生物毒性的影响,初步推断生物降解氰化物的机制。结果表明：在试验范围内（氰化物质量浓度0~2.0mg/L）,氰化物对微生物的新陈代谢有抑制作用,但未达到致死浓度;氰化物质量浓度为2.0mg/L时能完全抑制硝化过程;氰化物对微生物反硝化过程的抑制主要是在反硝化的第1步,即硝酸盐氮转化为亚硝酸盐氮过程中;微生物降解氰化物的机制是氰化物转化为氨氮,并最终转化为亚硝酸盐氮、硝酸盐氮。
The influence of wastewater with different concentrations of cyanide on microbes toxicity and mechanism of cyanide biodegradation were researched. Results show that when the concentration of cyanide ranges from 0 to 2.0 mg/L,cyanide has an inhibitory effect on the metabolism of microbe,but not lethal. When the cyanide concentration reaches 2. 0 mg/L, nitrifying process is completely suppressed. The inhibitory effect of cyanide on de-nitrification process is mainly on its first step, where nitrate converts to nitrite. The mechanism of cyanide biodegradation is that cyanide is firstly turned into ammonia nitrogen and finally converted to nitrite and nitrate.