Abstract: Using zeolite powder (diameter below 0.28 mm) as a treating agent, this paper had studied the removing effects of Microcystis aeruginosa cultured in laboratory and growing in stable period. The results show that zeolite powder had achieved better treatment effects on Microcystis aeruginosa by mechanisms of adsorption and co-settling with the alga cells and their colonies but given different efficiencies between the other two algae co-growing in the sample, which indicate the influences of characteristics ...