改进MBR工艺处理裂解脱水液废水

Analyze of Pyrolysis Dewatering Liquid Wastewater Treatment by Improved MBR Process

针对山西某工业污泥炭化工艺过程产生大量的裂解脱水液废水问题,采用改进MBR工艺(三级水稀释-MBR-NaClO)对废水进行处理。在连续进水实验中,分别分析了稀释倍数对出水COD及氨氮的影响,系统运行参数对出水COD的影响及进水COD分别为190.23 mg/L加NaClO情况下,出水水质的影响。实验结果表明,1)当稀释倍数为K1~K11,出水COD达到间接A级排放标准;2)进水MLSS质量浓度为2 705~4 205 mg/L时,COD去除率约为70%,系统抗击的最大COD污泥负荷达到0.1 5 kg/(kg·d),抗击最大COD容积负荷到达0.47 kg/(kg·d);3)出水加NaClO可以使未达标的COD、氨氮出水处理达标排放。

Aiming at the problem of a large number of industrial pyrolysis dewatering liquid wastewater produced in a certain Shanxi industrial sludge carbonization process, the improved MBR process （tertiary water dilution-MBR-NaC10） was used to treat the wastewater. In continuous water feeding experiment, the effects of dilution ratio On effluent COD and ammonia nitrogen, the effects of system running parameters on effluent COD concentration and the effects ofinfluent COD concentration was 190.23 mg/L and 539.1 mg/L with NaC10 on effluent quality were analyzed. The experimental results showed that, when the dilution ratio was K1 to K11, the COD concentration could achieve the class A indirect emission standard. When the MLSS kept from 2 705 mg/L to 4 205 mg/L, the COD removal rate could reach 70%, the maximum resistant of COD sludge loading reached 0.15 kg/（kg .d） and the maximum resistant of COD volume loading was 0.47 kg/ （m3.d）. In addition, NaC10 could make the concentration of COD, ammonia nitrogen and chroma of effluent met the emission standards.