Direct filtration for the treatment of the coagulated domestic sewage using flat-sheet ceramic membranes
Direct filtration for the treatment of the coagulated domestic sewage using flat-sheet ceramic membranes
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平板陶瓷膜直接过滤处理混凝生活污水
DOI：
10.1016/j.chemosphere.2019.02.055
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发表时间：
2019-05-01
期刊：
影响因子：
8.8
通讯作者：
Li, Xiao-yan
中科院分区：
文献类型：
--
作者：
Zhao, Yan-xia;Li, Pu;Li, Xiao-yan
直接膜过滤技术被认为是一种很有前途的城市污水处理技术。我们利用平板陶瓷膜（FSCM）的创新应用，快速处理生活污水的DMF。在FSCM过滤前进行混凝，以提高污染物去除率并减轻膜污染。这种混凝-FSCM过滤可以显着降低下游处理的污染物负荷，并将有机物和营养物质浓缩到污泥中，以促进资源回收。采用聚合氯化铝（PACI）为填料的FSCM过滤，进水COD和P的去除率分别为90.0%和99.0%，出水COD小于25.0mg/L。基于PACI的FSCM过滤的长期运行稳定地保持41.7 L/m（2）-h（LMH，或1.0 mid）的高通量。污染的膜每3-5 d进行一次化学清洗，用稀酸、稀碱、稀氯或稀H_2O_2溶液化学清洗10 min，膜的渗透性几乎可以完全恢复。新型FSCM工艺将从根本上推进污水处理技术。它可以很容易地模块化和安装为简单的附加单元，以升级和改造现有的废水处理系统。(C)2019爱思唯尔有限公司版权所有。
Direct membrane filtration (DMF) is considered as a promising technology for municipal wastewater treatment. We utilized an innovative application of flat-sheet ceramic membranes (FSCM) for DMF for the rapid treatment of domestic sewage. Coagulation was applied before FSCM filtration to increase the pollutant removal and to mitigate membrane fouling. This coagulation-FSCM filtration can significantly reduce the pollutant load on the downstream treatment and concentrate organics and nutrients into sludge to facilitate resource recovery. Using polyaluminum chloride (PACI) based FSCM filtration, approximately 90.0% of the chemical oxygen demand (COD) and 99.0% of the phosphorus (P) were removed from the sewage influent and retained in the concentrated sludge, with less than 25.0 mg/L COD left in the effluent. Long-term operation of the PACI-based FSCM filtration stably maintained a high flux of 41.7 L/m(2)-h (LMH, or 1.0 mid). The fouled membranes were cleaned chemically every 3-5 d, and the membrane permeability could almost be completely recovered using chemical backwash for only 10 min with a diluted acidic, alkaline, chlorine or H2O2 solution. The novel FSCM process will fundamentally advance wastewater treatment technology. It can be readily modularized and installed as simple add-on units to upgrade and retrofit existing wastewater treatment systems. (C) 2019 Elsevier Ltd. All rights reserved.