丙酸/乙酸比例对生物除磷系统的影响研究  

Effect of Different Ratios of Propionic/Acetic Acid on Biological Phosphorus Removal

作　　者：李亚静[1] 孙力平[1] 陈修辉[1] 

机构地区：[1]天津城市建设学院环境与市政工程系,天津300384

出　　处：《环境科学与技术》2010年第2期49-51,共3页Environmental Science & Technology

基　　金：天津市重大科技攻关项目(043112011);建设部重点科技项目(04227)

摘　　要：在5个SBR反应器(1#～5#)中,用乙酸、丙酸/乙酸(以C计)比例为0.5、2、10和丙酸的合成废水,通过厌氧/好氧工艺驯化活性污泥使之富集聚磷菌,研究了丙酸/乙酸比例对强化生物除磷系统(EBPR)中COD降解、溶解性正磷酸盐(SOP)的释放、吸收及其去除率的影响。结果表明,PAO对COD的降解符合一级动力学过程,PAO对丙酸的利用速率较乙酸快,因此,增加丙酸/乙酸比例有助于EBPR系统的稳定性。随丙酸/乙酸比例增加,SOP的释放与吸收量减少,SOP的代谢速率降低,但SOP的去除率依次为88.2%,89.8%,92.2%,94.2%和95.2%,去除率增加了7%,因此增加丙酸/乙酸比例有助于提高EBPR系统除磷效率。Five anaerobic-aerobic sequencing batch reactors were operated with PAOs activated sludge respectively with acetic acid, propionic to acetic acid carbon molar ratio of 0.5, 2, 10 and propionic acid. The influence of propionic/acetic acid ratio on COD degradation, as well as phosphorus release, uptake and removal during enhanced biological phosphorus removal （EBPR） were investigated. Results showed that COD degradation followed the first order kinetics and uptake rate of propionic acid was faster than that of acetic acid, which indicated that a higher ratio of propionic/acetic acid promoted EBRP stability. With the increase of propionic/acetic acid ratio, the soluble ortho-phosphorus （SOP） release and uptake decreased. SOP removal efficiency was observed to increase from 88.2% to 95.2%. Higher ratio of propionic/acetic acid improved the phosphorus removal.

关 键 词：强化生物除磷(EBPR) 聚磷菌(PAO) 丙酸 乙酸 

分 类 号：X703[环境科学与工程—环境工程]