摘要
开发出了针对低C／N比高氨氮废水处理的亚硝化／电化学生物反硝化全自养脱氮新工艺，并对新工艺进行了系统的研究．试验结果表明，新工艺能取得较好的脱氮效果，在溶解氧为0．5—1．2mg·L^-1，pH值为7．5—8．2，温度为17—30℃，进水氨氮浓度不高于1000mg·L^-1，C／N比不高于0．5，HRT不高于32h条件下，亚硝化／电化学反硝化工艺装置运行稳定，亚硝化段膜生物反应器（MBR）出水的氨氮去除率和亚硝氮生成率均能稳定在50％左右，MBR出水中的剩余氨氮和生成的亚硝氮经电化学生物反硝化段（硫碳混合反应器）处理后，最终出水总氮去除率超过95％；出水中的SO4^2-浓度不高于1280mg·L^-1．新工艺最高氨氮负荷为1．11kg·m^3·d^-1。
A complete autotrophic nitrlte-nitrification and electrochemical bio-denitrification combined process for the ammonium wastewater treatment, which was with high-concentration and low ratio of carbon to ammonium, was put forward and investigated extensively in this study. When the dissolved oxygen, the influent pH and the temperature was 0.5 - 1.2 mg·L^-1,7.5 - 8.2,17 - 30℃ respectively, and the influent ammonium concentration, the ratio of carbon to nitrogen and the Hydraulic Retention Time （HRT） was not higher than 1000mg·L^-1 , 0.5 and 32 h, the process could be operated efficiently for the ammonium removal. The effluent NH4^＋ -N removal and nitrite accumulation efficiency of the nitrite-nitrification membrane bioreactor was both about 50%. The residual ammonium and accumulative nitrite from the MBR was treated in the electrochemical denitrification reactor（ mixed sulfurcarbon three-demension-electrode biofilm denitrification reactor） subsequently, and the final effluent total nitrogen removal was above 95% , sulfate concentration was lower than 1280 mg·L^-1. The maximum Volume Loading Rate （VLR） of the process was 1.11 kg·m^3·d^-1.
出处
《环境科学学报》
CAS
CSCD
北大核心
2007年第3期375-385,共11页
Acta Scientiae Circumstantiae
基金
国家高技术研究发展计划(863)项目(No.2004AA649320)
甘肃省创新团队项目~~
关键词
亚硝化
电化学生物反硝化
低碳氮比
高氨氮
全自养
nitrite-nitrification
electrochemical bio-denitrlfication
the low ratio of carbon to ammonium
high-concentration ammonium
complete autotrophic
