陶瓷膜过滤收获微藻的效能与膜污染特征

发布时间：2018-03-16 15:37

本文选题：微藻收获　切入点：陶瓷膜过滤　出处：《应用化工》2017年06期 　论文类型：期刊论文

【摘要】：考察了平板陶瓷膜在次临界通量条件下多周期过滤收获小球藻细胞的效能以及跨膜压差、阻力构成、不可逆污染组分等膜污染特征。结果表明,次临界通量条件下,采用孔径100 nm的陶瓷膜多周期过滤能够有效收获普通小球藻。84%~98%的进水藻细胞以滤饼层方式被截留,通过物理清洗膜表面能够获得高浓度藻液,浓缩因子高于34。3个过滤周期内膜污染均呈现先缓慢增加后急剧升高的两阶段变化趋势。随过滤周期增加,膜污染急剧升高阶段显著加速,其主要原因是小球藻细胞及其EOM形成的协同污染效应以及水力不可逆污染的逐渐累积。水力不可逆污染组分的有机物分子量特征是100~1 000 Da的低分子酸以及1~10 kDa的蛋白类有机物,其中多种芳香族类蛋白和可溶性微生物产物是主要组分。
[Abstract]:The effects of multi-cycle filtration on the harvesting of Chlorella microphylla cells and the characteristics of membrane fouling under the condition of subcritical flux and membrane pressure difference, composition of resistance and irreversible fouling components were investigated. The results showed that under the condition of sub-critical flux, the membrane fouling characteristics of the membrane were studied. The ceramic membrane with the pore diameter of 100nm can effectively harvest 98% of the cells from Chlorella vulgaris. 98% of the cells were cut off by the cake layer, and the high concentration algae solution could be obtained by physically cleaning the membrane surface. The concentration factor above 34.3 filtration cycles showed a two-stage trend of slow increase and then sharp increase. With the increase of filtration cycle, the membrane fouling increased rapidly, and the membrane fouling increased significantly. The main reasons are the synergistic pollution effect of Chlorella vulgaris cells and their EOM formation and the gradual accumulation of hydraulic irreversible pollution. The molecular weight of organic compounds of hydraulic irreversible pollution component is 100000 Da low molecular weight acid and 1 10 kDa protein organic substance. Among them, a variety of aromatic proteins and soluble microbial products are the main components.
【作者单位】：清华大学深圳研究生院清华-康达环境纳米工程技术研究院;清华大学环境学院;新泽西理工大学市政与环境工程学院;
【基金】：广东省科技计划项目(2015A010106002) 深圳市科技计划项目(JCYJ20150320154458994,JCYJ20160331185226856)
【分类号】：TQ028.8

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