The utility model relates to a diffuser for waste water. There are many ways to treat sewage, one of which is the activated sludge method. It uses artificial methods to strengthen the metabolic process of microorganisms, that is, in addition to maintaining a sufficient quantity and good performance of activated sludge in the sewage tank, sufficient dissolved oxygen must be provided to meet the needs of microorganism growth and reproduction.
Use microorganisms to swallow harmful substances in sewage to achieve the purpose of water purification. Usually, the supply of oxygen in the sewage tank involves an aeration process that forces the oxygen in the air into the sewage.