生物膜CANON反应器性能的优化：从FBBR到MBBR  

Optimization of the Nitrogen Removal Performance on the CANON Process in a Biofilm Reactor:From FBBR to MBBR

作　　者：付昆明[1] 李慧[1] 周厚田 仇付国[1] FU Kun-ming, LI Hui, ZHOU Hou-tian, QIU Fu-guo(Key Laboratory of Urban Storm Water System and Water Environment, Sino-Dutch R＆D Centre for Future Wastewater Treatment Technologies, Ministry of Education, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, Chin)

机构地区：[1]北京建筑大学城市雨水系统与水环境省部共建教育部重点实验室,中-荷污水处理技术研发中心,北京100044

出　　处：《环境科学》2018年第5期2256-2264,共9页Environmental Science

基　　金：北京市教育委员会科技发展计划项目(SQKM201710016006); 国家自然科学基金项目(51308025)

摘　　要：控制温度为30℃±1℃,在移动床式生物膜反应器(MBBR)采用以改性聚乙烯为填料的全程自养脱氮(CANON)工艺,以无机高NH_4^+-N(约400 mg·L^(-1))人工模拟废水为连续进水,研究MBBR对生物膜CANON工艺脱氮性能的优化.试验控制pH在7.8左右,HRT为6 h,填料填充率为35%,经过一个月调试与培养,NH_4^+-N及TN平均去除率达到74.28%和87.93%,最高分别可达84.68%和98.82%,此时ΔNO-3/ΔTN为0.12,接近理论值0.127,由此判断CANON污泥在MBBR工艺中逐渐适应并得以稳定运行.同时,对比采用相同进水基质及控制条件的固定床式生物膜反应器(FBBR),计算发现MBBR与FBBR工艺NH_4^+-N去除率、TN去除率及去除负荷3组均方差分别为:8.31%和14.06%,7.09%和11.79%,0.17kg·(m3·d)-1和0.27 kg·(m3·d)^(-1),前者均低于后者;并且,在MBBR与FBBR的DO平均浓度分别为1.96 mg·L^(-1)和3.09mg·L^(-1)的情况下,MBBR与FBBR中每升氮去除负荷分别为0.53 kg·(m^3·d)^(-1)和0.37 kg·(m^3·d)^(-1).因此,(1)相比FBBR,MBBR具有更加稳定的脱氮性能;(2)相比FBBR,MBBR中每升填料中的微生物具有更高的O2利用效率及总氮去除负荷.To optimize the performance of completely autotrophic nitrogen removal over nitrite（ CANON）,a CANON process with modified polyethylene as carriers was operated in a moving-bed biofilm reactor（ MBBR）,using synthetic inorganic ammonia-rich wastewater（ NH4~＋-N about 400 mg·L^（-1）） as influent at 30℃ ± 1℃. With an HRT of 6 h,pH at 7. 8,and filling rate of 35%,the average removal rate of NH4~＋-N and TN reached 74. 28% and 87. 93%,respectively,and the highest removals reached 84. 68% and98. 82%,respectively,while the value of ΔNO-3/ΔTN was 0. 12,which was close to the theoretical value of 0. 127. This suggested that CANON sludge gradually adapted to the environment in the MBBR and began to enter the stable stage. Compared with a fixed-bed biofilm reactor（ FBBR） under the same influent and operating conditions,the mean square error of MBBR and FBBR in terms of NH4~＋-N removal rate,TN removal rate,and TN removal load were 8. 31% and 14. 06%,7. 09% and 1. 79%,0. 17 kg·（ m^3·d）^（-1） and 0. 27 kg·（ m3·d）^（-1）,respectively,the former are lower than the latter. Moreover,while DO concentrations of MBBR and FBBR were 1. 96 mg·L^（-1） and 3. 09 mg·L^（-1）,respectively,their TN removals of per liter carriers were 0. 53 kg·（ m^3·d）^（-1） and 0. 37 kg·（ m^3·d）^（-1）. Therefore,it was concluded that：（1） MBBR had a more stable nitrogen removal performance than did of FBBR,and（2）MBBR had a higher TN removals of per liter carriers than did FBBR in addition to the higher utilization rate of oxygen.

关 键 词：移动床生物膜反应器 固定床生物膜反应器 全程自养脱氮工艺 高氨氮 污水处理 改性聚乙烯 

分 类 号：X703[环境科学与工程—环境工程]