摘要
分别在5、10、15、20、25 L/(m2.h)5个膜通量下,考察了平板膜生物反应器(MBR)对餐饮废水的处理效果。结果表明,随着膜通量的提高,出水COD和NH3-N浓度稍有升高,但去除率都基本维持在90%以上;同时,MBR对TN、TP、BOD5、DOC、浊度、含油量、SS、UV254等都有很好的去除效果,出水水质完全符合《城市污水再生利用城市杂用水水质》的要求。对比进、出水中DOC的分子质量分布发现,进水中的大分子有机物被降解为小分子有机物。通过测定不同膜通量下混合液的MLSS、SV30、污泥粒径、粘度等指标,发现MLSS和SV30与粘度之间有很好的线性关系。在运行结束时进行阻力分布测试,发现随着膜通量的增大,内部阻力比例逐渐增大,而滤饼层阻力和浓差极化阻力的比例都逐渐下降。
The treatment efficiency of restaurant wastewater in flat sheet membrane bioreactor was investigated at membrane fluxex of 5, 10, 15, 20 and 25 L/（m2 @ h） respectively. The operation results show that with the increase of membrane flux, the effluent COD and NH3 - N are slightly increased, but their removal rates remain at 90% or more. Meanwhile, the MBR process has a good removal effect of TN, TP, BODs, DOC, turbidity, oil, SS, UV254 and so on. The effluent quality meets the requirement of Reuse of Urban Recycling Water--Water Quality Standard for Urban Miscellaneous Water Consumption （ GB/T 18920 - 2002）. In comparison of molecular weight distribution of DOC between the influent and the effluent, it is found that the organic compounds with larger molecules in the influent are degraded into those with smaller molecules. A good linear relationship of MLSS and SV30 to viscosity is observed when measuring MLSS, SV30, sludge particle size, viscosity and other indicators at different membrane fluxes. At the end of the experiment, the test of resistance distribution shows that as the membrane flux is increased, the proportion of the internal resistance is increased, while the proportions of the cake layer re-sistance and the concentration polarization resistance are decreased.
出处
《中国给水排水》
CAS
CSCD
北大核心
2010年第17期57-61,共5页
China Water & Wastewater
基金
上海市科委项目(08231200200
09DZ1204200)
关键词
平板膜生物反应器
餐饮废水
膜通量
flat sheet membrane bioreactor
restaurant wastewater
membrane flux
