BIOLOGICAL PURIFICATION CARRIER FOR WATER AND METHOD AND DEVICE FOR PURIFYING WATER USING ITS CARRIER

摘要

PURPOSE:To efficiently purify water by using hydrogel particles which consist of a highly water absorbing polymer, and swell in the water and show elasticity, as a carrier, increasing a microorganism and holding it on its surface and in its inside, and also, bringing the hydrogel particles into contact with water in a suspended flow state. CONSTITUTION:Carrier particles consisting of a highly water absorbing polymer are thrown into the water of a treating object in an aeration tank A, they are swollen in the water and hydrogel particles having elasticity are subjected to suspended flow. In this regard, in order to prevent the hidrogel particles from flowing out, a screen B is provided in an outlet of the aeration tank A. Also, a diffusing tube 2 is provided in a bottom part of the aeration tank A, and gas is fed in from a blower 10, etc. Moreover, in the upper part of the aeration tank A, a raw water supply tube 3 is provided. On the other hand, treated water treated in the aeration tank A is fed into a precipitator 4. Subsequently, in the aeration tank A, the hidrogel particles become a carrier, and by increasing and holding a microorganism on its surface and in its inside, the biological purification of water is executed efficiently.