摘要
为培养亚硝酸盐型反硝化聚磷菌实现好氧颗粒污泥(AGS)短程硝化内源反硝化除磷,设置3组同规格以厌氧/好氧/缺氧后置短时曝气(AO_(1)A-O_(2))模式运行的SBR,各反应器好氧段/后置好氧段(O_(1)/O_(2))的曝气强度和曝气时间均不同,通过对比3组反应器60 d的运行情况,探究各系统污染物处理性能和功能菌活性。结果表明,后置短时低氧曝气10 min且O_(1)、O_(2)的曝气强度分别为5、2.5 L/(h·L)的R2脱氮除磷效果最佳,其COD、TP、NH^(+)_(4)-N、TN去除率达95.49%、95.57%、100%、95.52%。通过短时好氧饥饿和低溶解氧可以创造出短程硝化内源反硝化除磷的最适环境,R2中约60%的除磷菌为DPAOs,且亚硝酸盐型聚磷菌最多,可达38.76%,其反应器好氧段的亚硝酸盐积累率(R_(NA))为74.19%,实现了较高的NO^(-)_(2)-N积累,游离亚硝酸(FNA)为1.03μg/L,可抑制PAOs和NOB,同时富集出更多的AOB和DPAOs。
In order to culture nitrite DPAOs to achieve aerobic granular sludge(AGS)short-range nitrification and endogenous denitrification and phosphorus removal,three groups of SBR with the same specifications were operate in anaerobic/aerobic/anoxic followed by short aeration(AO 1 A-O 2)mode.The aeration intensity and duration of aerobic/post aerobic(O 1/O 2)varied among the reactor.By comparing the operational performance and functional microbial activity of the three reactor groups over a period of 60 days,the pollutant removal efficiency and activity of functional bacteria in each system were investigated.The results showed that R2 with short time hypoxia aeration for 10 min and the DO concentrations of O 1 and O 2 at 5 and 2.5 L/(h·L)had the best nitrogen and phosphorus removal effect,and the removal rates of COD,TP,NH+4-N and TN reached 95.49%,95.57%,100%and 95.52%,respectively.The optimal environment for short-range nitrification and endogenous denitrification and phosphorus removal was created by short-term aerobic starvation and low dissolved oxygen.Approximately 60%of the phosphorus removal bacteria in R2 were DPAOs,with the highst proporton being nitrite phosphate-polyphosphate bacteria,accouting for 38.76%.The R NA of the aerobic phase of the reactor was 74.19%,which achieved high NO-2-N accumulation.The concentration of FNA was 1.03μg/L,which inhibited PAOs and NOB while enriching more AOB and DPAOs.
作者
张杰
杨杰
李冬
ZHANG Jie;YANG Jie;LI Dong(Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering(Beijing University of Technology),Beijing 100124,China;State Key Laboratory of Urban Water Resource and Environment(Harbin Institute of Technology),Harbin 150090,China)
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2024年第6期1-7,共7页
Journal of Harbin Institute of Technology
基金
北京高校卓越青年科学家计划(BJJWZYJH 01201910005019)。
关键词
短程硝化
好氧颗粒污泥
反硝化除磷
短时曝气
partial nitrification
aerobic granular sludge
denitrifying phosphorus removal
short-term aeration
