反硝化除磷的生物化学代谢模型  

Metabolic Model for Denitrifying Biochemical Phosphorus Removal

作　　者：王亚宜[1] 王淑莹[1] 彭永臻[1] 

机构地区：[1]北京工业大学环境与能源学院

出　　处：《中国给水排水》2006年第6期4-7,共4页China Water & Wastewater

基　　金：国家自然科学基金重点项目(20377003);中国博士后科学基金资助项目(2005037296);浙江省自然科学基金资助项目(Y505031)

摘　　要：基于Delft科技大学和活性污泥法动力学模型(ASM2D)推出的反硝化除磷生物化学代谢模型,从生物除磷的计量学和动力学两方面介绍了反硝化除磷过程一系列复杂的生化反应机理。反硝化除磷与传统好氧除磷的生化反应机理非常相似,两种除磷模式的许多化学计量学和动力学方程可以通用;好氧除磷动力学所涉及的一部分参数同时也适用于反硝化除磷动力学;两者最大的区别就是氧化单位NADH2所吸收的磷酸盐量(P/NADH2)不同。引起两者P/NADH2值不同的最根本原因在于:以氧气作为电子受体和以硝态氮作为电子受体,消耗单位NADH2所产生的ATP量不同。在An/ASBR反硝化除磷系统中,测得该值为1.0 molATP/molNADH2,此值较An/OS-BR型好氧吸磷系统降低了40%左右。From the aspects of biological phosphorus removal stoichiometry and dynamic model, the complex biochemical reaction mechinism of denitrifying phosphorus removal was introduced based on the denitrifying phosphorus removal metabolic model, which was put forward by the Delft University and Activated Sludge Model No. 2. Denitrifying and aerobic metabolism are identical except that nitrate or oxygen is the final acceptor in the electron transport phosphorylation process. This means that the majority of metabolic reactions arc identical. Some kinetic parameters under aerobic condition can also be used by denitrifying phosphorus uptake. The main difference is the value of P/NADH2 ratio in the electron transport phosphorylation with nitrate which is caused by the ATP/NADH2 ratio. The ATP/NADH2 ratio is the only model parameter that is different for aerobic and denitrifying growth. Ratio of ATP/NADH2 in electron transport phosphorylation with nitrate in the anaerobic/anoxic sequencing batch reactors is 1.0 molATP/molNADH2 and is approximately 40% lower than with oxygen in anaerobic （An/OSBR） system.

关 键 词：生物除磷 反硝化吸磷 代谢模型 化学计量学模型 动力学模型 

分 类 号：X703[环境科学与工程—环境工程]