悬浮填料生物膜-MBR系统处理制浆中段废水的研究

The Study on Treatment of Pulping Effluent by Suspended Carrier Biological Film-MBR System

关键词:  悬浮填料  生物膜  MBR  制浆中段废水

Key Words:suspended carrier  biological film  MBR  pulping middle-stage effluent

摘要:采用悬浮填料生物膜-MBR系统处理制浆中段废水，并与好氧活性污泥系统进行了对比。驯化过程中，尤其是制浆中段废水所占比例较高时，悬浮填料生物膜-MBR的处理效果和污泥理化特性均明显优于好氧活性污泥系统。驯化结束时悬浮填料生物膜-MBR系统COD_Cr去除率高达90.6%，悬浮液固形物浓度(MLSS)达到3876 mg/L，污泥体积指数（SVI）为60.3 mL/g，而好氧活性污泥系统COD_Cr去除率为82.4%，MLSS为3135 mg/L，SVI为70.3 mL/g。对出水的紫外扫描结果表明，悬浮填料生物膜-MBR系统对200～300 nm波长处特征污染物的降解效果明显优于好氧活性污泥系统。

Abstract:Treatment of pulping effluent by the suspended carrier biological film -MBR system was carried out, and compared with using the aerobic activated sludge system. The treatment effect and the sludge physic-chemical properties in the suspended carrier biological film-MBR system were better than that of the aerobic activated sludge system during the domestication, especially when high proportion of the pulping effluent was used. COD_Cr removal efficiency was as high as 90.6%, MLSS was 3876 mg/L, and SVI value was 60.3 mL/g in the suspended carrier biological film -MBR system after domestication. As contrast COD_Cr removal efficiency was 82.4%, MLSS was 3135 mg/L, and SVI value was 70.3 mL/g in the aerobic activated sludge system. The UV-vis spectrum of the discharged effluent indicated that degradation efficiency of the specific pollutants of 200~300 nm adsorption was higher by using suspended carrier biological film -MBR system than aerobic activated sludge system.