摘要
以往污水处理厂设计中对碱度关注较少,在原污水TN、NH_3-N浓度大幅度增大而排放浓度要求更低的条件下,TN、NH_3-N的处理成为目前污水处理厂设计、运行的主要矛盾之一,污水碱度是其重要影响因素之一。从硝化反硝化原理、碱度来源及其影响、污水处理工艺对碱度的影响、调整碱度药剂的选择等方面进行了论述,提出对污水处理过程中碱度的设计要求,以确保出水NH_3-N达标。
The importance of alkalinity is always neglected in the design process of wastewater treatment plant. Under the conditions of increasing influent TN, NH3 - N concentration and the requirement of decreasing effluent concentration, controlling TN, NH3 - N removal performance has become an issue in the design and operation of wastewater treatment plant. Then, as one of the important factors in the nitrogen removal process, alkalinity ought to be paid much attention. In this paper, all the following aspects have been discussed, such as the principle of nitrification/denitrification, source and effect of alkalinity, influence of wastewater treatment mode on alkalinity variation, and alkalinity controlling by chemicals. Finally, the requirement of alkalinity level and controlling in design process has been put forward to ensure the effluent NH3 -N below the standard.
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第10期34-36,共3页
China Water & Wastewater
关键词
碱度
硝化反硝化
缓冲能力
alkalinity
nitrification and denitrification
buffer capacity
