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首页> 外文期刊>Chemical engineering journal >Performance and membrane fouling in an integrated membrane coagulation reactor (IMCR) treating textile wastewater
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Performance and membrane fouling in an integrated membrane coagulation reactor (IMCR) treating textile wastewater

机译：集成膜混凝反应器（IMCR）处理纺织品废水的性能和膜污染

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An integrated membrane coagulation reactor (IMCR) was employed to treat textile wastewater. Color could be removed almost completely and chemical oxygen demand (COD) removal efficiency could reach 88% with polyaluminum chloride (PAC1) dose 1.2 mmol/L, influent pH 5.5 and hydraulic retention time (HRT) 3 h. Membrane fouling experienced three phases and a higher PACl dose aggravated the membrane fouling. The contact angle of new membrane was 52.5 degrees while the fouled ones' were around 81 degrees. The fractal dimension of floc formed with PACl 1 mmol/L was 1.88 while it reached 2.22 with PACl 1.4 mmol/L A more permeable filter cake was formed with PACl 1 mmol/L and could alleviate the membrane fouling effectively. Both the trans-membrane pressure (TMP) and TMP increment were greater when the IMCR was equipped with larger molecular weight cutoff (MWCO) membrane. The physically reversible and irreversible filtration resistances (Rf) of the IMCR with membrane MWCO 50, 100 and 150 kDa were 3.2,9.1 and 31.4 times of there intrinsic membrane filtration resistances, respectively. Membrane was fouled more seriously when the higher MWCO membrane was used during the IMCR process. Independent of the membrane MWCO, lower molecular weight (MW) fractions resulted in the irreversible membrane fouling.
机译：集成膜混凝反应器（IMCR）用于处理纺织废水。聚氯化铝（PAC1）剂量为1.2 mmol / L，进水pH 5.5和水力停留时间（HRT）3 h时，颜色几乎可以完全去除，化学需氧量（COD）去除效率可以达到88％。膜结垢经历了三个阶段，较高的PACl剂量加剧了膜结垢。新膜的接触角为52.5度，污垢膜的接触角为81度左右。 PACl 1 mmol / L形成的絮状物的分形维数为1.88，而PACl 1.4 mmol / L达到的絮凝物分形维数为2.22。PACl 1 mmol / L形成的滤饼更具渗透性，可以有效减轻膜的结垢。当IMCR配备较大的分子量截留（MWCO）膜时，跨膜压力（TMP）和TMP增量均较大。膜分子量为50、100和150 kDa的IMCR的物理可逆和不可逆过滤阻力（Rf）分别是其固有膜过滤阻力的3.2、9.1和31.4倍。在IMCR过程中使用较高的MWCO膜时，膜的污染更严重。与膜MWCO无关，较低的分子量（MW）馏分导致不可逆的膜污染。

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