好氧序批式MBR处理高浓氨氮废水

Aerobic Sequencing MBR for Treatment of High Concentration Ammonia Nitrogen Wastewater

采用好氧序批式膜生物反应器(SMBR)处理高浓度氨氮废水,考察了对NH+4 -N和COD的去除效果、影响硝化效果的因素以及混合液中残留COD与膜通量的关系。结果表明:在HRT为 4. 7h、SRT为 30d、气水比为 100∶1、pH值为 7. 0~8. 0、进水COD平均值为 142. 8mg/L的条件下,当进水氨氮高达 800mg/L时出水氨氮值仍能稳定在 10mg/L以下,出水COD平均值为31. 3mg/L。

Aerobic sequencing MBR was used for treatment of high concentration ammonia nitrogen wastewater to investigate NH^+_4-N and COD removal effect, factors affecting nitrification effect, and the relation between residual COD in mixed liquor and membrane flux. The result shows that under the conditions of HRT 4.7 h, SRT 30 d, air-water ratio 100 ∶1, pH 7.0-8.0, and average influent COD value 142.8 mg/L, when influent ammonia nitrogen is as high as 800 mg/L, the effluent ammonia nitrogen can be constant at less than 10 mg/L and COD is averaged at 31.3 mg/L.