摘要
工程实践表明,城镇污水处理厂运行的最大难点在于总氮的去除,实现出水达到一级A标准,这给很多污水处理厂带来了巨大挑战。有些水厂为了创造脱氮的反应条件,过量投加碳源,最终导致出水COD的超标。因此研究反硝化脱氮的设计及运行控制要点具有很大必要性。本文针对污水深度处理中总氮的有效去除这一问题,从技术原理、工艺选择、运行参数控制等方面进行阐述,并结合工程实践说明如何对反硝化脱氮工艺进行运行控制。
The engineering practice shows that the biggest difficulty in the operation of urban sewage treatment plant is the removal of total nitrogen,and the effluent reaches grade A standard,which brings great challenges to many sewage treatment plants.In order to create reaction conditions for nitrogen removal,some water plants add excessive carbon sources,which eventually leads to the excess of effluent COD.Therefore,it is very necessary to study the design and operation control points of denitrification and denitrification.In view of the effective removal of total nitrogen in wastewater advanced treatment,this paper expounds the technical principle,process selection,operation parameter control,and describes how to operate the denitrification and nitrogen removal process combined with engineering practice.
关键词
前置反硝化
碳源
投加量
硝化液回流比
pre-denitrification
carbon source
dosage
nitrification liquid reflux ratio
