生活污水厌氧氨氧化脱氮工艺研究

Research on the Process of Deep Denitrification of Anaerobic Ammonia Oxidation in Domestic Sewage

城镇生活污水是主要的氮排放源,导致生态环境危害。随着我国城镇化进程的加快,生活污水的排放越来越多,相应的生活污水处理的需求也增多,传统的污水处理工艺已无法满足需求,需要研究更高效的污水脱氮工艺。本文以生活污水为研究对象,采用A/O与UASB串联工艺,USAB作为深度脱氮反应器,探究以厌氧氨氧化为核心的污水生物脱氮工艺,将厌氧氨氧化反应器与常规生化反应器(A/O)串联,在常规生化反应器实现亚硝化,进而与UASB串联,系统最高去除95%的氨氮和86%的总氮。在基本不额外增加运行成本的基础上达到了提高出水水质、深度脱氮效果,该工艺的控制参数对现有污水处理厂提标、降耗具有一定借鉴意义。

Urban domestic sewage is the main source of nitrogen emissions,which leads to ecological and environmental hazards.The traditional biological denitrification process has high aeration energy consumption and carbon source investment costs,which cannot meet the increasingly stringent sewage treatment and discharge standards.There is an urgent need to explore efficient and low-consumption deep denitrification processes for sewage.This study takes domestic sewage as the research object,adopts the A/O and UASB series process,and USAB as the deep denitrification reactor to explore the biological denitrification process of sewage with anaerobic ammonia oxidation as the core.The anaerobic ammonia oxidation reactor is connected in series with the conventional biochemical reactor(A/O)to achieve nitrification in the conventional biochemical reactor,and then in series with the UASB,the system removes up to 95%of ammonia nitrogen and 86%of total nitrogen.On the basis of basically no additional operating costs,the effect of improving the water quality of the effluent and deep denitrification has been achieved.The control parameters of this process have certain reference significance for the improvement and consumption reduction of existing sewage treatment plants.