【摘要】：膜污染層是一種典型的多孔介質(zhì)。在膜污染研究中,通常利用海藻酸鈉為代表的多糖類污染液進(jìn)行過濾實(shí)驗(yàn)。本文在海藻酸鈉污染液中加入了酵母粉代表的蛋白質(zhì)類污染物,對混合污染液進(jìn)行了過濾實(shí)驗(yàn)。采用免疫熒光染色的方法對膜污染層內(nèi)的多糖和蛋白質(zhì)進(jìn)行了標(biāo)記,并利用共聚焦激光掃描顯微鏡進(jìn)行觀測。通過圖像分割技術(shù)得到膜污染層孔隙和骨架的二值圖,進(jìn)而計(jì)算了多孔介質(zhì)層的孔隙率。結(jié)果表明膜污染層孔隙率的減小與膜過濾過程中透膜流量的衰減相對應(yīng),蛋白質(zhì)類污染物在過濾過程中限制了多糖類污染物在膜表面的附著與堆積。
[Abstract]:Membrane fouling layer is a typical porous medium. In the study of membrane fouling, sodium alginate is usually used for filtration experiments. In this paper, the protein pollutants represented by yeast powder were added to the solution of sodium alginate, and the filtration experiments were carried out. The polysaccharides and proteins in the membrane fouling layer were labeled by immunofluorescence staining and observed by confocal laser scanning microscope. The binary map of the porous and skeleton of the membrane contaminated layer was obtained by image segmentation technique, and the porosity of the porous media layer was calculated. The results show that the decrease of membrane fouling layer porosity corresponds to the attenuation of permeable membrane flow rate during membrane filtration, and protein pollutants restrict the adhesion and accumulation of polysaccharides on the membrane surface during the filtration process.
【作者單位】： 清華大學(xué)熱科學(xué)與動力工程教育部重點(diǎn)實(shí)驗(yàn)室二氧化碳資源化利用與減排技術(shù)北京市重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(No.51176090,No.51321002)
【分類號】：X703
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本文編號：2213389