Abstract:Currently, filtration is a commonly used treatment method in wastewater treatment plants. Based on the differences in the materials and properties of filtration media, filtration can be classified into four main categories: microfiltration, ultrafiltration, nanofiltration, and reverse osmosis. The objective of this study is to develop a novel type of porous CaCO3 membrane-filter through the process of microbial-induced calcium carbonate precipitation (MICP). The membrane-based filter is designed to remove microorganisms as well as eliminate extracellular polymeric substances (EPS) from solution. The experimental findings demonstrate that MICP driven porous CaCO3 filter is highly efficient in eliminating Escherichia coli, Brachybacterium sp., and activated sludge, with removal rates of about 99.998%, 99.983% and 99.996%, respectively. It also exhibits superior EPS removal capability compared to general filter paper. Additionally, the MICP-treated bioslurry possesses desirable pore space, non-blocking features, and high permeability.