SBR分段进水工艺提高污水厂的脱氮效率  

Ways of SBR step feed process to improve efficiency of nitrogen removal in wastewater treatment plant

作　　者：王加蒙 彭澄瑶[2] 辛振兴[2] 李晓玲[1] 彭永臻[1,2] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090 [2]北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100124

出　　处：《环境工程学报》2015年第5期2131-2136,共6页Chinese Journal of Environmental Engineering

基　　金：国家"水体污染控制与治理"科技重大专项(2012ZX07302002-06)

摘　　要：研究了SBR分段进水工艺用于污水厂升级改造并提高脱氮效率的方法,通过对昆明某污水厂实际运行工艺的实际调研,决定从运行模式、进水方式和排水比变化三方面用SBR研究影响脱氮效率的因素。结果表明,将原工艺2次搅拌、2次曝气的运行模式改为1次搅拌、1次曝气,会改善原模式下第2次搅拌过程中无反硝化反应的状况,提高系统的总氮去除率;将原工艺连续进水的方式改变为间歇进水,系统的脱氮效率提高了5%以上;分3个阶段研究了排水比在20%~40%之间变化对总氮去除率的影响,每阶段2个反应器的对比实验发现,排水比变大相应的总氮去除率升高,但当排水比为35%和40%时系统出水中会有较高浓度的氨氮,因此,排水比为30%最为合宜。The SBR step feed process was adopted for wastewater treatment plant upgrade to improve the efficiency of nitrogen removal in a Kunming wastewater treatment plant after field investigation in this study. The effects of operation mode,way of influent and ratio of drainage on total nitrogen removal were studied in laboratory scale SBR reactors. Results showed that denitrification process was hardly occurred in the second mixing process of the original operation mode for stirring twice and aeration twice,while the transformed operation mode for stirring once and aeration once could increase the TN removal efficiency. Besides,when the original continuity influent mode was changed to intermittent influent mode,nitrogen removal efficiency increased by more than5%; In addition,when drainage ratio varied between 20% ~ 40%,three stages were separately compared,it was found that the TN removal efficiency increased as the rise of drainage ratio in each stage. However,when the ratios were 35% and 40%,the concentration of ammonia in effluent largely increased. Therefore,the optimum drainage ratio was 30%.

关 键 词：污水厂改造 运行模式 间歇进水 排水比 

分 类 号：X703.1[环境科学与工程—环境工程]