活性炭曝气生物滤池深度处理化工废水的研究

Study on Biological Aerated Filter of Active Carbon in Tertiary Treatment for Treating Complex Chemical Wastewater

采用活性炭曝气生物滤池深度处理二级生化后的综合化工废水。在不同的气水比和水力停留时间条件下,以上向流式的运行方式,测试了对 COD_(cr)和氨氮的去除效果,由数学模型计算了出水COD_(cr)达到国家一级排放 B 标准的60 mg/L 时所需的滤池高度。结果表明,在气水比为4:1和停留时间为3 h 时,处理效果最好,COD_(cr)和氨氮的浓度分别从119.97 mg/L 降到16.49 mg/L 和25.03 mg/L 降到4.73 mg/L,去除率分别为86.25%和81.10%。该课题为生物活性炭深度处理化工废水工程提供了有益的参考。

On the basis of complex chemical secondary effluent wastewater character, removal CODCr and NH3-N are studied by using the biological aerated filter system of active carbon for tertiary wastewater treatment. The stuff height, in fluent basicity, and CODCr et al. are analyzed for influence of removal CODCr and NH3-N under conditions of different ratio of air and wastewater and HRT as up flow, and on the basis of mathematical relationship model and CODCr influent and effluent concentration the biological aerated filter height while CODCr effluent concentration below 60 mg/l is achieved. Results show that under conditions of 4 ： 1 ratio of air and wastewater and HRT 3 h , NH3-N effluent concentration are decreased from 25.03 mg/1 to 4.73mg/ 1, CODCr effluent concentration are decreased from 119.97 mg/L to 46.49 mg/1,and 81.10% NH3-N and 61. 25% CODCr. Removal efficiency are got respectively, and NH3-N volume load 0. 380 kg/（m3 · d）. The greater removal efficiency was reached, and a scientific basis of reference is provided for reused wastewater in removal nitrogen tertiary treatment with biological aerated filter system.