Research Progress on the Impact of Exogenous Substances on the Operation of Anaerobic Ammonium Oxidation Processes
The anaerobic ammonium oxidation(Anammox)process is an emerging waste water denitrification process.However,problems such as poor stress resistance of Anammox bacteria,long generation time,and long start-up time limited the promotion and application of the Anammox process.Adding exogenous substances is an effective means to shorten the start-up time of the Anammox process and enhance the denitrification performance of the Anammox system.Therefore,in order to understand the impact of exogenous substances on the denitrification performance of the Anammox process and clarify the mechanism by which it improves the denitrification efficiency of the Anammox system,this article reviewed the mechanisms by which common exogenous substances improve the denitrification performance of the Anammox process,pointed out the commonality of the impact of the addition of exogenous substances on the Anammox process,and summarized the limitations of the study on the denitrification efficiency of the exogenous substance-enhanced Anammox process.The results showed that exogenous addition of materials(such as iron,manganese,copper,nickel,potassium,calcium and graphene)improved the denitrification performance of the Anammox reactor by improving the Anammox bacterial habitat,stimulating the enrichment of Anammox functional microorganisms,regulating the expression of denitrification-related functional genes,promoting exocrine synthesis,and improving the stress resistance of Anammox bacteria.Currently,a large number of studies remain at the laboratory stage and only consider the impact of a single exogenous substance on the Anammox system.Future research should focus on considering the synergistic promotion or antagonistic effects of multiple exogenous substances on the denitrification ability of the Anammox system,discussing the appropriate addition amounts of exogenous substances under different working conditions,and exploring the mechanism by which exogenous substances regulate the physiological activities of Anammox bacteria and enhance the nitrogen removal efficiency of the Anammox system.
NETL
NSTL
万方数据
