摘要
中国石油兰州石化分公司采用污水深度处理中试装置，对达标排放水进行净化处理。结果表明，污水经曝气生物滤池后，排水中的CODCr氨氮、石油类化合物和悬浮物平均去除率依次为66．47％，94．23％，78．17％，77．42％；在聚合铁和聚丙烯酰胺的加入量分别为14mg／L和1．3mg／L时，随着处理时间的延长，高效微絮凝池出水浊度趋于稳定（约为0．75NTU），在经过砂滤池过滤后，悬浮物杂质去除率达到了92．0％以上，出水浊度为0．36～0．75NTU；当微滤单元水量为3m3／h[膜通量为60L／（m2·h）]时，随着反冲洗周期的延长，膜压差梯度变化增大，最佳反冲洗周期为30min。
The purification treatment of drain water which could meet the need of relative discharge standard was conduced in a pilot unit of Lanzhou Petrochemical Company. The results showed after treated in a biological aerated filter, the average removal rates of CODCr,NH3 - N, oil species and suspended solid in drain water were 66.47%, 94.23% , 78. 17% , 77.42% respectively. When polyiron of 14 mg/L and poIyacrylamide of 1.3 mg/ L were added into a high efficiency micro - flocculation settling basin, the turbidity of drain water was stable （about 0.75 NTU）. After filtrated in a sand filter, over 92% suspended solid was removed and the turbidity was 0. 36 -0. 75 NTU. When the water flux in microfiltration unit was 3 m3/h and the membrane flux was 60 L/（m2· h） , the gradient variation of membrane pressure drop increased with the back wash period extended, and the optimum back wash period was 30 min.
出处
《石化技术与应用》
CAS
2008年第6期577-580,共4页
Petrochemical Technology & Application
关键词
污水
曝气生物滤池
微滤
膜通量
膜压差
waste water
biological aerated filter
microfiltration
membrane flux
membranepressure drop
