影响MBR处理效果及膜通量的因素研究

Study on the Factors Influencing Treatment Effect and Membrane Flux of Anaerobic/Oxic Membrane Reactor (A/O MBR)

采用处理规模为 10m3 /d的厌氧 /好氧膜生物反应器 (A/OMBR)处理毛纺印染废水 ,试验结果表明 :当原水COD、BOD5、色度、浊度分别为 2 5 6 .5mg/L、94 .8mg/L、6 4倍、4 5 .6 5NTU时 ,相应的出水指标分别为 2 0 .2mg/L、1.6mg/L、2 5倍、0 .5 1NTU ,其水质达到《生活杂用水水质标准》(CJ2 5 .1— 89) ;溶解氧是影响处理效果的一个关键因素 ;随着运行时间的延长、膜污染的增加 ,温度对膜通量的影响降低 ;膜面流速较高时 。

A pilot study was conducted for the treatment of dyeing wastewater from woolen mill by using A/O MBR with capacity of 10 m 3/d. The result showed that for the raw wastewater with COD 256.5 mg/L, BOD 5 94.8 mg/L, color 64 dilution times, and turbidity 45.65 NTU, the value of corresponding index in effluent is respectively 20.2 mg/L, 1.6 mg/L, 25 dilution times, and 0.51 NTU. Effluent quality comes up to the miscellaneous domestic water quality standard (CJ 25.1-89). Dissolved oxygen is the key factor influencing the treatment effect. With the extension of operating time and increase of membrane fouling, temperature has lower effect on membrane flux. The sludge concentration has little impact on membrane flux at high crossflow velocity.