环境工程学报2017，Vol.11Issue(8)：4609-4614,6.DOI:10.12030/j.cjee.201606120
焦化废水在厌氧反硝化产甲烷体系中降解动力学特征
Degradation kinetics characteristics of coking wastewater in anaerobic simultaneous denitrification and methanogenesis
王孝维 1岳秀萍 1薛晖军1
作者信息
- 1. 太原理工大学环境科学与工程学院,太原 030024
- 折叠
摘要
Abstract
Inoculated mature granular sludge and coking wastewater (carbon source) were used to study the characteristics of organics degradation in an anaerobic, simultaneous denitrification and methanogenesis system under different C/Ns.Test results showed that:1) Pollutants in coking wastewater could be effectively removed using anaerobic simultaneous denitrification and methanogenesis.2) When the C/N ratio was 3 or 6,only denitrification occurred, without any methane production in the reaction.Anaerobic simultaneous denitrification and methanogenesis was observed when the C/N ratio was 12 or 50.3) Denitrification had priority in this system,and the excess carbon was degraded by methanogenesis after denitrification was completed.Accumulation of NO2--N was observed during denitrification.The maximum accumulation rate of NO2-N, and the methanogenic activity recovery time, were both reduced when the C/N ratio increased.4) The rate of carbon consumption during denitrification was greater than during methanogenesis in this system.Denitrification helped stabilize the pH,lower the ORP, and promote methane bacteria breeding;so the efficiency of organics removal with the anaerobic simultaneous methanogenesis and denitrification system was higher than with a single system for anaerobic methanogenesis.关键词
焦化废水/反硝化/产甲烷/亚硝酸盐积累/COD/NO3--N/CH4Key words
coking wastewater/denitrification/methanogenesis/nitrite accumulation/COD/NO3--N/CH4分类
资源环境引用本文复制引用
王孝维,岳秀萍,薛晖军..焦化废水在厌氧反硝化产甲烷体系中降解动力学特征[J].环境工程学报,2017,11(8):4609-4614,6.
