摘要
某煤化工废水零排放系统受高浓度氨氮废水的冲击,出水氨氮高达65~92 mg/L,导致水系统发生氨氮富集故障。通过改造工艺流程降低污水站处理负荷;取消SBR闲置步续;调整脱氨氮阶段pH;将高浓度的火炬凝液改入厌氧系统预处理;加强老化污泥的置换,缩短污泥龄;恢复BAF池连续曝气等6项措施。氨氮富集问题得以解决,系统出水氨氮低于15 mg/L,达到《污水综合排放标准》(GB 8978-1996)二类一级排放标准。
The wastewater zero discharge system was affected by high concentration ammonia nitrogen wastewater, the effluent ammonia nitrogen is as high as 65~92 mg/L, which causes ammonia nitrogen enrichment in the water system. By taking six measures: renovation process to reduce sewage station treatment load;cancel the SBR idle step;adjusting the pH of the deamination stage;the high concentration of the torch condensate is changed to the anaerobic system for pretreatment;strengthen the replacement of aged sludge and shorten the sludge age;restore the BAF pool for continuous aeration. The ammonia nitrogen enrichment problem is solved after operation adjustment, and the ammonia nitrogen of the drainage system is lower than 15 mg/L, which is superior to the second-class discharge standard of the Integrated Wastewater Discharge Standard(GB 8978-1996).
作者
魏江浪
刘春林
Wei Jianglang;Liu Chunlin(Shanxi Yanchang China Coal Yulin Energy Chemical Industry Co.,Ltd.,Yulin 718500,China)
出处
《给水排水》
CSCD
北大核心
2019年第11期84-86,91,共4页
Water & Wastewater Engineering
关键词
煤化工废水
零排放
氨氮富集
Coal chemical
Wastewater zero discharge
Ammonia nitrogen enrichment
