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Anti-fouling effect by internal air injection in plate-type ceramic membrane fabricated for the treatment of agro-industrial wastewater
Journal of Water Process Engineering ( IF 6.3 ) Pub Date : 2021-03-15 , DOI: 10.1016/j.jwpe.2021.102021
Dong-Jin Son , Dae-Gun Kim , Woo-Yeol Kim , Ki-Ho Hong

The ceramic microfiltration membrane which composed of membrane body having macro pore and active layer having micro pore was fabricated successfully by the process including the sintering of tape-casted and laminated mixture of zirconia and polyvinyl butyral binder, and re-sintering after screen coating of zirconia. The average pore size and porosity of the fabricated membrane were 0.1855 μm and 40 %, respectively. A novel membrane microfiltration system adopting the fabricated ceramic membrane was also devised for the treatment of agro-industrial wastewater, and the effects of external air sparging and internal air injection were investigated. A significant improvement of permeability by external air sparging was not observed, and the permeate flux was about 20 L/m2/h. Despite the abnormal biomass status resulted from low water temperature and poor maintenance of facility, however, the system operated at the initial TMP of 0.4 bar and internal air injection intervals of 5 min showed excellent permeability of 100 L/m2/h. In addition, although several periodic internal air injections with inverse pressure was carried out, structural defects of fabricated ceramic membrane were not observed. Thus, it confirmed that the anti-fouling effect by optimum back-flushing strategy in fabricated ceramic membrane was effective for stability enhancement of agro-industrial complex wastewater treatment process suffering from maintenance.



中文翻译:

内注空气在处理农业工业废水的平板式陶瓷膜中的防污效果

通过烧结氧化锆与聚乙烯醇缩丁醛粘合剂的流延浇铸和层合的混合物,以及在氧化锆丝网涂覆后进行再烧结的方法,成功地制造了由具有大孔的膜体和具有微孔的活性层组成的陶瓷微滤膜。 。制得的膜的平均孔径和孔隙率分别为0.1855μm和40%。还设计了一种采用陶瓷膜的新型膜微滤系统,用于处理农业工业废水,并研究了外部空气喷射和内部空气注入的影响。未观察到由于外部空气喷射而导致的渗透率的显着改善,并且渗透通量为约20 L / m 2。/H。尽管由于水温低和设备维护不良而导致生物质状态异常,但是,该系统以0.4 bar的初始TMP和5分钟的内部空气注入间隔运行仍显示出100 L / m 2 / h的优异渗透率。另外,尽管进行了几次反压的周期性内部空气注入,但是未观察到所制造的陶瓷膜的结构缺陷。因此,证实了通过优化的反冲洗策略在所制造的陶瓷膜中的防污效果对于增强维护性的农-工业复杂废水处理过程的稳定性是有效的。

更新日期:2021-03-16
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