基于微生物矿化诱导的多孔碳酸钙微滤膜制备及水净化应用

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Abstract： Filtration is a prevalent treatment modality doma wastewater management.Dependg on materials properties filtration media，filtrationcan be clasified to four ma categories： micriltration，ultrafiltration，naniltration， reverse osmosis.The present study focuses on preparation a novel porous CaCO3 micriltration membrane，which is based on microbial-duced calcium carbonate precipitation （MICP） biomeralization process. Initially， CaCO3 crystal particles with urease activity are prepared by controllg MICP meralization process.Secondary microbial meralization is used to cement loose calcium carbonate particles，mg a contuous porous solid CaCO 3 membrane with certa mechanical strength.Filtration tests on bacterial cells，extracellular protes， polysaccharides show that MICP-driven porous CaCO3 membrane effectively removes Escherichia coli， Brachybacterium sp.， activated sludge，with removal rates 99.998% ， 99.983% ， 99.996% ，respectively. Compared to conventional filter paper， this porous CaCO3 membrane demonstrates superior capability removg extracellular polymers （EPS）. Furrmore， CaCO3 micriltration membrane prepared usg MICP process also exhibits ideal pore space，non-blockg characteristics， high permeability.

Keywords：wastewater treatment；micriltration； filter；microbial-duced calcium carbonate precipitation （MICP）；water purification

摘要：过滤是废水处理中常用的方法，根据过滤介质材料和性质的不同，可以分为4大类：微滤、超滤、纳滤和反渗透。（剩余25862字）