ZHANG Yong,QIN Yu-lan,FAN Xiao-li,et al.Application of Flat Ceramic MBR Process in Rural Sewage Treatment[J].China Water & Wastewater,2021,37(10):120-125.
平板陶瓷膜MBR工艺在农村污水处理中的应用
- Title:
- Application of Flat Ceramic MBR Process in Rural Sewage Treatment
- 摘要:
- 为了解平板陶瓷膜生物反应器用于农村污水处理的可行性，分析了某处理能力为500 m3/d的一体化陶瓷膜污水处理设备的运行数据。该项目进水水质水量波动大，冬季水温低，稳定运行期设备出水COD、氨氮、TP浓度平均值分别约为17.54、1.35、0.19 mg/L。平板陶瓷膜在16~40 L/(m2·h)的通量下运行时，其跨膜压差平均上升速率为1 kPa/d，可通过在线化学清洗恢复。在处理农村污水时，需做好预处理，定期观察膜吹扫曝气的均匀性，控制污泥浓度<15 g/L。对于进水浓度低、污泥浓度<1 g/L的项目，可增大反冲洗频次且同步减少反冲洗时间，将跨膜保护压差设置为-55 kPa左右。
- Abstract:
- In order to understand the feasibility of flat ceramic membrane bio-reactor in village sewage treatment, the operation data of an integrated ceramic membrane sewage treatment facility with processing capacity of 500 m3/d was analyzed. The inlet water quality and quantity fluctuate greatly, and water temperature is low in winter. Under stable operation, the average effluent concentrations of COD, NH4+-N, and TP are about 17.54, 1.35, and 0.19 mg/L respectively.When the flat ceramic membrane is operated at a flux of 16-40 L/(m2·h), the average rise rate of the transmembrane pressure(TMP) is 1 kPa/d, which can be restored through cleaning in place. As for treating village sewage, it is necessary to pay attention to pre-treatment, to regularly inspect the uniformity of the membrane purge aeration, and to control sludge concentration less than 15 g/L. For projects with low water concentration load and low sludge concentration as below 1 g/L, the backwash frequency can be increased and the backwash time can be reduced simultaneously, so as to increase the transmembrane pressure to about -55 kPa.
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