O/A/O工艺处理焦化废水的关键因素分析研究  

Analysis and research on key factors in O/A/O process for treating coking wastewater

作　　者：赵二华[1] ZHAO Er-hua

机构地区：[1]中冶赛迪工程技术股份有限公司,重庆401122

出　　处：《节能》2024年第9期97-99,共3页Energy Conservation

摘　　要：采用“预曝-缺氧-曝气(O/A/O)”工艺处理焦化废水,对影响降解化学需氧量(COD)和氨氮的关键因素进行研究。结果表明,在进水COD≤5 500 mg/L,氨氮≤100 mg/L废水水质下,控制预曝池进水负荷1.5~1.7 COD kg/(m^(3)·d)、溶解氧0.8~2.0 mg/L,控制曝气池溶解氧4.0~4.5 mg/L,生化段整体出水COD_(cr)小于300 mg/L,氨氮可小于5 mg/L。研究同时分析了焦化废水处理中亚硝氮累积和出水总氰化物超标的问题,并提出了相应的解决方案。The"pre-aeration-anoxic-aerobic(O/A/O)"process was used to treat coking wastewater,and the key factors affecting the degradation of COD and ammonia nitrogen were studied.The results show that under the wastewater quality conditions of influent COD≤5500 mg/L and ammonia nitrogen≤100 mg/L,by controlling the influent load of the pre-aeration tank at 1.5~1.7 COD kg/m^(3)·d and dissolved oxygen at 0.8~2.0 mg/L,and controlling the dissolved oxygen in the aeration tank at 4.0~4.5 mg/L,the overall effluent COD_(cr) from the biological treatment section can be less than 300 mg/L,and ammonia nitrogen can be less than 5 mg/L.The study also analyzed the issues of nitrite accumulation and total cyanide exceeding the standard in the treated coking wastewater and proposed corresponding solutions.

关 键 词：焦化废水 进水负荷 溶解氧 氨氮 亚硝氮 

分 类 号：X784[环境科学与工程—环境工程]