淹没式MBR处理啤酒废水的净化效能研究

在投加营养物质,保持COD:TN:TP=100:5:1的条件下,淹没式MBR对啤酒废水中的COD、NH 4-N有着较好的去除效果,系统稳定时COD与NH 4-N的平均去除率均在90%以上,而且MBR工艺对进水有机负荷的冲击具有较强的短时适应能力,当COD污泥负荷由0.27g/g·d突然增加至0.54g/g·d时,出水COD浓度未出现明显的波动。通过GC/MS分析得出,膜组件出水中剩余的有机物主要为高分子量的烷烃类,膜组件对于保证系统的最终出水水质起到了关键的作用。

TREATMENT OF BREWERY WASTEWATER BY SUBMERGED TYPE MBR

Under the conditions of dosing nutriment and keeping COD: TN:TP=100:5:1, the submerged type MBR had better removal effect on COD, NH4- N in synthesis brewery wastewater. When the system being stable, the average removal rates of COD and NH4 N were over 90% in the influent water, moreover, MBR technology had stronger adapting ability to the shock of organic loading;whenCOD-sludge loading rate abruptly increased from 0.27g/gd to 0.54g/gd, the fluctuation of COD concentration in effluent water did not appeared obviously. It is concluded through GC/MS analysis that the remaining organics in the effluent water from the membrane modules were mainly alkane and the like; modules took a key role in ensuring the water quality of the system's final effluent. When the sludge in the reactor was in the period of growth, under the joint action of biological assimilation and simultaneous nitrification-denitrification, TN had the removal effect of about 40%; when sludge concentration was in stable period, TN removal rate lowered by about 30%, being mainly the results of simultaneous nitrification-denitrification. When sludge was in the period of growth, through biological assimilation, TP had a certain removal effect, while sludge concentration was stable, TP had no removal effect basically, even negative removal rate phenomenon appeared.