作　　者： ; ; ; ; ; ;

机构地区： 广西大学资源与冶金学院

出　　处： 《水处理技术》 2013年第9期116-120,共5页

摘　　要： 在厌氧-缺氧-好氧SBR条件下,以乙酸钠作为单一碳源,通过对2个反应器R1、R2中硝酸盐(NO3--N)浓度、磷酸盐(PO43--P)浓度和磷酸盐不同投加时间的控制,研究了胞内聚合物对反硝化和反硝化除磷的驱动关系。结果表明,R1、R2的除磷效率均达到91%以上,且R1的除磷效率和性能比R2较为稳定。R1展示了典型的反硝化除磷过程,缺氧阶段的反硝化除磷的能量来源由聚-β-羟基链烷酸酯(PHA)提供。R2中在缺氧条件下磷酸盐浓度很低(2.63 mg/L)时,硝酸盐浓度随着PHA的降低而减少,其中聚-β-羟基丁酸盐(PHB)的含量明显降低,而聚-β-羟基戊酸盐(PHV)有轻微的减少,并伴有少量糖原质(Gly)的再合成;磷酸盐加入后,PHA与Gly一同作为碳源被消耗,这表明反硝化菌能够利用PHA作为内碳源实现反硝化过程。而R2的PHB合成量少于R1,Gly的合成量和PHV的合成量却高于R1,说明R2的运行条件较R1而言更有利于聚糖菌(GAOs)的生长。 To investigate the denitrification and denitrifying phosphorus removal driven by intracellular polymers in anaerobic-anoxic-aerobic SBR, with dominating the concentration and additive time of nitrate and phosphate in two reactors RI and R2, acetate were fed as the sole carbon source. R1 and R2 were totally same at operation expect for anoxic and aeration periods. R1 showed a typical denitrifying phosphorus removal process and both of nitrate and phosphate were added in at the beginning of anoxic phase, the energy was provided by poly-β-hydroxyalkanoate （PHA） in anoxic period; as a contrast, phosphate was mixed in a hour later the nitrate in R2 both R1 and R2 performed well in phosphorus removal, 96.83% and 96.15% of the average efficiencies of phosphorus removal in two reactors were respectively obtained, and R1 performed more stable than R2. When the concentration of PO43--P was quietly low in R2, the concentration of nitrate decreased when PHA was decreasing concurrent with Gly replenishment, Poly-β-hydroxybutyrate （PHB） was consumed obviously, but poly-β-hydroxyvalerate （PHV） just had a slight decrease. When phosphate mixed into R2, PHA and glycogen were both consumed for denitrifying phosphorus removal. The study indicated that the denitrifying microorganisms could drive the denitrification by using PHA as an internal carbon source, and the result also demonstrated that the condition of operation in R2 was better for the metabolism of GAOs because of the higher content of Glycogen and PHV.

关 键 词： 反硝化除磷 反硝化 胞内聚合物 糖原质

领　　域： [环境科学与工程]