研究报告
郭劲松,杨琳,陈猷鹏,方芳,唐金晶.三维电极生物膜反应器全程自养脱氮的启动研究[J].环境科学学报,2012,32(6):1342-1347
三维电极生物膜反应器全程自养脱氮的启动研究
- Start-up of a completely autotrophic nitrogen removal process in a three-dimensional electrode-biofilm reactor
- 基金项目：国家重大水专项(No.2009ZX07104-002);教育部重大项目(No.308020);中央高校基本科研业务费专项资金(No.CDJZR11210002)
- 作者
- 单位
- 郭劲松
- 重庆大学三峡库区生态环境教育部重点实验室,重庆 400045
- 杨琳
- 重庆大学三峡库区生态环境教育部重点实验室,重庆 400045
- 陈猷鹏
- 重庆大学三峡库区生态环境教育部重点实验室,重庆 400045
- 方芳
- 重庆大学三峡库区生态环境教育部重点实验室,重庆 400045
- 唐金晶
- 重庆大学三峡库区生态环境教育部重点实验室,重庆 400045
- 摘要：采用人工配制氨氮废水,对三维电极生物膜反应器进行全程自养脱氮的启动研究.反应器中阳极采用钌涂层钛棒,在阳极区电解水产氧供硝化菌进行硝化反应;阴极采用活性炭纤维毡,并在阴极区填充活性炭颗粒构建三维电极,在阴极区电解水产氢供反硝化菌完成反硝化过程.在进水NH4+-N浓度30 mg·L-1、温度30 ℃、HRT为24 h的试验条件下,通过调节DO和 pH实现对硝化和反硝化反应的控制.结果表明,经过挂膜、驯化、稳定这3个较为典型的阶段后,反应器对NH4+-N去除率达到了97.8%,TN的去除率为92.4%,成功实现了三维电极生物膜反应器全程自养脱氮的启动.扫描电镜结果显示,阴极活性炭纤维毡表面的细菌主要为短杆状假单胞菌,活性碳颗粒表面的细菌为微球反硝化细菌,同属氢自养反硝化细菌,反应器中稳定的自养脱氮系统逐步建立.
- Abstract：A completely autotrophic nitrogen removal process was started up in a three-dimensional electrode-biofilm reactor for artificial ammonia wastewater treatment. The titanium rod coated with a thin layer of ruthenium was used as anode to generate oxygen. In the aerobic area, NH4+-N was oxidized to NO3--N or NO2--N by nitrifying bacteria. The active carbon fiber-felt was used as cathode to generate hydrogen. And in this anaerobic area, the denitrification was completed while hydrogen was acted as the electron donor. A lot of carbon particles were filled in the cathode area used as three-dimensional electrode. Nitrification and denitrification process were controlled by adjusting dissolved oxygen and pH values under the condition that the initial concentration of ammonia-nitrogen was 30 mg·L-1, the hydraulic retention time was 24h and the temperature was 30 ℃. After biofilm was formed and stabilized, the removal rate of NH4+-N and TN achieved 97.8% and 92.4% respectively. It was indicated that the completely autotrophic nitrogen removal was started up successfully. The scanning electron microscopy showed that the bacteria on surface of activated carbon fiber felt were mainly short rod-shaped Pseudomonas, while the bacteria on the surface of the activated carbon particles were Micrococcus denitrificans. They both belong to hydrogen autotrophic denitrifying bacteria. In the reactor, the stable autotrophic nitrogen system was gradually established.
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