摘要
以厌氧-低氧(0.15～0.45mg/L)条件下的序批式反应器(SBR)为研究对象,探讨了丙酸/乙酸比例对低能耗同时生物除磷脱氮系统的影响.结果表明,以丙酸/乙酸比为1/1(SBR-A)或2/1(碳摩尔比)为碳源(SBR-B),系统中均发生同时生物氮和磷的去除,低氧阶段氨氮被全部氧化,并且没有亚硝酸盐的大量累积.与SBR-A相比,SBR-B中厌氧阶段磷释放量少,聚羟基戊酸(PHV)和二甲基三羟基戊酸(PH2MV)合成量高,低氧末磷剩余量少,硝态氮累积少,SBR-B中总氮和磷的去除率(分别为82%和97%)比SBR-A(分别为68%和94%)高.因此,丙酸/乙酸比例的增加有助于提高同时生物除磷脱氮系统中氮和磷的去除效果.
Two sequencing batch reactors, SBR-A and SBR-B with propionic/acetic acid carbon molar ratio of 1/1 and 211, respectively, Which were operated under conditions of anaerobic-low dissolved oxygen （DO） （0.15-0.45mg/L）, and the influences of propionic to acetic acid ratio on biological nitrogen and phosphorus removal were investigated. The results showed that the simultaneous biological nitrogen and phosphorus removal occurred in both SBR-A and SBR-B, and the ammonia was completely oxidized during the low DO period without substantive nitrite accumulation. Compared with SBR-A, SBR-B showed less anaerobic phosphorus release and more anaerobic polyhydroxyvalerate （PHV） and polyhydroxy-2-methylvalerate （PH2MV） syntheses, but had lower phosphorus and nitrate concentrations at the end of low DO stage. The total nitrogen and phosphorus removal efficiencies were higher in SBR-B （82% and 97%, respectively） than in SBR-A （68% and 94%, respectively） suggesting that the increase of propionic/acetic acid ratio would be helpful to both nitrogen and phosphorus removal in anaerobic-low DO biological wastewater treatment system.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2008年第8期673-678,共6页
China Environmental Science
基金
国家"863"项目(2007AA06Z326)
高等学校博士学科点专项科研基金资助项目(20060247006)
关键词
序批式反应器
丙酸/乙酸
低能耗
同时生物除磷脱氮
sequencing batch reactor （SBR）
propionic/acetic acid ratio
low energy consumption
simultaneous biological nitrogen and phosphorus removal
