丙酸/乙酸比值对反硝化除磷的影响  

Effects of Propionic/Acetic Acid Ratios on Denitrifying Phosphorus Removal

作　　者：李亚静[1,2] 陈修辉[2] 孙力平[2] 季民[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]天津城市建设学院环境与市政工程系,天津300384

出　　处：《中国给水排水》2011年第1期79-81,共3页China Water & Wastewater

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：分别以丙酸、丙酸/乙酸(浓度比值为0.5、2)、乙酸为碳源,在SBR中采用厌氧/缺氧方式驯化富集反硝化聚磷菌(DPB),研究了丙酸/乙酸比值对反硝化除磷系统中有机物的降解、PO43--P的释放与吸收、NO X--N浓度、PHB和糖原含量以及污泥中磷含量的影响。结果表明,随着丙酸/乙酸比值的提高,厌氧释磷量减少,厌氧末期的PHB含量降低,缺氧段聚磷菌的合成和代谢能力减弱,最终导致对PO43--P的去除率降低。因此,乙酸含量高的碳源更利于反硝化除磷的进行。Using propionic acid, acetic acid and propionic/acetic acid with ratio of 0.5 and 2 as carbon sources, sequencing batch reactor was operated in anaerobic/anoxic mode to domesticate and enrich DPB. The influences of propionic/acetic acid ratios on COD degradation, PO4^3- - P release and uptake, NOx-- N concentration, poly-hydroxy-butyrate （PHB）, glycogen and phosphorus in the sludge during denitrifying phosphorus removal were investigated. The results show that with the increase of propionic/acetic acid ratio, the anaerobic phosphorus release, PHB, synthesis and metabolism of DPB are all decreased, resulting into the decrease in removal rate of PO4^3- - P. So the carbon source with high acetic acid is more favorable for denitrifying phosphorus removal.

关 键 词：反硝化除磷 丙酸 乙酸 溶解性正磷酸盐 PHB 糖原 

分 类 号：X703[环境科学与工程—环境工程]