• 关键词：亚硝化  电化学生物反硝化  低碳氮比  高氨氮  全自养

• 基金项目：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

• 王海燕
• 中国环境科学研究院水污染控制技术研究室, 北京 100012

• 葛建团
• 甘肃省环境科学设计研究院, 兰州 730030

• 刘海涛
• 1. 中国环境科学研究院水污染控制技术研究室, 北京 100012; 2. 北京桑德集团, 北京 101102

• 蒋进元
• 中国环境科学研究院水污染控制技术研究室, 北京 100012

• 周岳溪
• 中国环境科学研究院水污染控制技术研究室, 北京 100012

• 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SO₂₄-浓度不高于1280mg·L^-1.新工艺最高氨氮负荷为1.11kg·m^-3·d^-1.

• Abstract：Acomplete autotrophic nitrite-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 pHand 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 NH+4-Nremoval and nitrite accumulation efficiency of the nitrite-nitrification membrane bioreactor was both about 50%. The residual ammonium and accumulative nitrite from the MBRwas treated in the electrochemical denitrification reactor(mixed sulfur-carbon three-demension-electrode biofilm denitrification reactor)subsequently, and the final effluent total nitrogen removal was above 95%, sulfate concentration was lower than 1280mg·L^-1. The maximum Volume Loading Rate (VLR) of the process was 1.11 kg·m^-3·d^-1.

• Key words：nitrite-nitrification  electrochemical bio-denitrification  the low ratio of carbon to ammonium  high-concentration ammonium  complete autotrophic

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