METHOD FOR PURIFYING WASTE WATER

摘要

PROBLEM TO BE SOLVED: To provide a high-capacity method for purifying waste water by allowing an aerobe or an anaerobe and a useful microorganism such as photosynthetic bacteria to symbiose. SOLUTION: This method for purifying waste water is provided with a purification equipment 2 for treating the waste water essentially with an aerobe or an anaerobe and an activation equipment 3 for treating the waste water essentially with a useful microorganism, a part of the sludge generated in the purification equipment 2 is supplied to the waste water to be treated in the activation equipment 3, and the waste water treated while adjusting the sewage concn. of the activation equipment 3 is mixed in the purification equipment 2 and treated again.