不同盐度生活污水硝化及N2O释放特性  

Effect of Salinity on Nitrogen Removal and N2O Release Characteristic in Domestic Wastewater

作　　者：巩有奎 任丽芳[1] 彭永臻 GONG Youkui;REN Lifang;PENG Yongzhen(Department of Architecture Engineering, Yantai Vocational College, Yantai 264000, China;Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing 100124, China)

机构地区：[1]烟台职业学院建筑工程系,山东烟台264000 [2]北京工业大学,北京市水质科学与水环境恢复工程重点实验室,北京100124

出　　处：《水处理技术》2019年第9期99-103,共5页Technology of Water Treatment

基　　金：国家自然科学基金（21177005）;烟台职业学院博士科研基金（2018002）

摘　　要：以14 L序批式活性污泥反应器(SBR)处理含盐生活污水,控制曝气体积流量60 L/h、时间300 min,考察不同盐度(NaCl)SBR内微生物活性变化,并确定反应器脱氮及N2O释放特性。结果表明,盐度对各菌群抑制程度亚硝态氮氧化菌(NOB)>氨氧化菌(AOB)>碳氧化菌。盐度<10 g/L,AOB和NOB受抑制程度较低,而N2O还原受明显抑制,N2O产率由盐度0时的5.14%增至10 g/L时的7.96%。盐度增至20 g/L,AOB和NOB均受到明显抑制,系统内亚硝化率达90%以上。系统淘洗出NOB,由全程硝化转变为短程硝化过程。NO^-2-N大量积累和AOB相对含量增加,为低含氧条件下AOB的好氧反硝化提供了条件,高盐度对氧化亚氮还原酶活性抑制也导致了系统N2O释放量增加。Using a 14 L sequencing batch activated sludge reactor (SBR) to treat salt containing domestic wastewater, with the aeration rate of 60L/h and the aeration time of 300 min. the change of microbial activity in SBR with different salinity was studied, and the denitrification and N2O release properties of the reactor were determined. The results showed that, The degree of salinity inhibition on the flora was NOB> AOB> carbon oxidation bacteria. With the salinity less than 10 g/L, AOB and NOB were less inhibited, while the N2O reduction was significantly inhibited with the N2O yield increasing from 5.14% at salinity of 0 to 7.96% at salinity of 10 g/L. Both AOB and NOB were significantly inhibited at the salinity of 20 g/L, with the nitrite accumulation rate reached more than 90%. The NOB was continuously washed out the system, the whole nitrification translated to the partial nitrification. Large amount of NO2 - accumulation and the relative content of AOB increased provided conditions for aerobic denitrification of AOB under low oxygen condition. The inhibition of nitrous oxide reductase activity by high salinity also led to an increase of N2O release in the system.

关 键 词：氧化亚氮 盐度 生活污水 硝化 

分 类 号：X799.3[环境科学与工程—环境工程]