静置/好氧/缺氧序批式反应器(SBR)脱氮除磷效果研究  

Biological phosphorus and nitrogen removal in a sequencing batch reactor( SBR) operated in static/aerobic/anoxic regime

作　　者：许德超[1,2] 陈洪波[1,2] 李小明[1,2] 杨麒[1,2] 曾恬静[1,2] 罗冠[1,2] 彭波[1,2] 汪志龙[1,2] 谢继慈[1,2] 

机构地区：[1]湖南大学环境科学与工程学院,长沙410082 [2]湖南大学环境生物与控制教育部重点实验室,长沙410082

出　　处：《环境科学学报》2014年第1期152-159,共8页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金资助项目(No.51078128;51278175)~~

摘　　要：以静置段代替传统厌氧段,采用后置缺氧方式,考察了静置/好氧/缺氧序批式反应器(SBR)(R1)的生物脱氮除磷(BNR)性能,并与传统厌氧/好氧/缺氧序批式反应器(SBR)(R2)进行对比.两反应器进水乙酸钠、氨氮(NH+4-N)及磷酸盐(PO3-4-P)浓度均分别为350 mg·L-1(以COD计)、40 mg·L-1及12 mg·L-1,水力停留时间(HRT)为12 h.研究结果表明,R1长期运行中磷的去除率与R2相当,分别为92.4%和92.1%,而总氮(TN)去除率则较R2高,分别为83.5%和77.0%.R1静置段省去搅拌但仍能起到厌氧段的作用,为好氧快速摄磷奠定了基础,同时R1缺氧段发生反硝化摄磷,使出水磷降至0.91 mg·L-1.好氧段内R1发生了同步硝化-反硝化(SND),贡献了18.0%的TN去除量,R2也存在SND,但脱氮贡献率较少,仅为9.8%.R1和R2后置缺氧反硝化均以糖原驱动,反硝化速率分别为0.98、0.84 mg·g-1·h-1(以每g VSS产生的N(mg)计),出水TN分别为6.62、9.21 mg·L-1.研究表明,静置段代替传统厌氧段后,可获得更好的脱氮效果,且工艺更为简化.A sequencing batch reactor （SBR） （R1） with static/aerobic/anoxic regime was used for biological nutrient removal （BNR）. To investigate the feasibility of static phase as a substitute for conventional anaerobic phase, the performance of R1 was compared to anaerobic/aerobic/anoxic SBR （R2）. The concentrations of influent acetate, ammonia nitrogen （NH4＋-N） and phosphate （PO43--P） in both reactors were 350 mg·L^-1, 40 mg·L^-1and 12 mg·L^-1, respectively, and the hydraulic retention time （HRT） was 12 h. The experimental results demonstrated that the phosphorus （P） removal efficiency in R1 （92.4%） was comparative to R2 （92.1%）. However, total nitrogen （TN） removal efficiency of R1 （83.5%） was higher than that of R2 （77.0%）. Static phase in R1 still worked as anaerobic phase without stirring, which contributed to rapid P uptake in aerobic phase. The effluent P of 0.91 mg·L^-1 was achieved through denitrifying P removal in anoxic phase. Simultaneous nitrification and denitrification （SND） in aerobic phase contributed 18.0% of TN elimination in R1, much higher than that of R2 （9.8%）. In the post-anoxic phase, microorganisms utilized glycogen as carbon source to drive denitrification, exhibiting denitrification rates （DNRs） of 0.98, 0.84 mg·g-1·h^-1 and 6.62, 9.21 mg·L^-1 of effluent TN in R1 and R2, respectively. Better nitrogen removal efficiency was obtained with anaerobic phase replaced by static phase, and the configuration was further simplified.

关 键 词：静置段 后置缺氧 生物脱氮除磷(BNR) 同步硝化-反硝化 糖原 

分 类 号：X17[环境科学与工程—环境科学]