Chitosan coagulation to improve microbial and turbidity removal by ceramic water filtration for household drinking water treatment

Porous ceramic filters are promoted globally for household water treatment, but they are ineffective in removing viruses from water. To increase virus removal, we combined a natural coagulant, chitosan, as a pretreatment for ceramic water filters and evaluated its performance. Turbidity reduction with chitosan treatment and filtration consistently resulted in turbidities of less than one NTU, which meet the standards of the US Environmental Protection Agency and the World Health Organization (WHO). According to WHO health-based microbial removal targets for household water treatment technology, chitosan coagulation achieved health protective targets for both viruses and bacteria. Our results support the use of chitosan as a natural coagulant to remove contaminants from drinking water.

Chitosan coagulation to improve microbial and turbidity removal by ceramic water filtration for household drinking water treatment. Lydia S. Abebe, Xinyu Chen, and Mark D. Sobsey. 2016. International Journal of Environmental Research and Public Health 13(3), 269. doi:10.3390/ijerph13030269.