Aerobic/anaerobic co-treatment method to high concentrated organic waste water by self-closed air releasing control and bubble reducing layer, and micro air bubble injection

摘要

The present invention constitutes a wastewater aeration tank for injecting fine air of less than 1 millimeter in order to purify high concentration organic wastewater rapidly and efficiently under aerobic conditions, and simultaneously expresses air release suppression, foam generation suppression, and fixed bed carrier function at the upper layer of the aeration tank. A layer is formed, a carrier of a material (styropol, sponge, plastic) having a specific gravity smaller than water is added to the uppermost layer, and a mesh network is installed on the carrier.;Carrier flotation suppression device is installed on the carrier so that the uppermost carrier layer can maintain a certain level of internal pressure.;The external release of the fine air injected through the multi-layer upper layer is suppressed, the air specific surface area is increased by increasing the amount of internal air, and the internal pressure of the tank is increased by the air suppression layer at the uppermost layer, which greatly increases the amount of oxygen dissolved in the tank. . In addition, the two layers form an immobilized carrier layer to exert an effect of improving organic decomposition efficiency.;Through the above system, even in high concentration organic wastewater, DO is maintained at 2-3 or more, so that even if the microbial MLSS concentration is increased above 8,000 PPM, anaerobic does not occur, and thus high concentration organic wastewater can be operated as an aerobic process. In addition, the inside of the uppermost carrier layer, which is thickly accumulated with microorganisms, forms a partial anaerobic state to maintain both aerobic and anaerobic conditions in the same tank, thereby widening the range of decomposable substances of high concentration organic wastewater and improving nitrogen removal efficiency. Effect is exerted.;In particular, the scum sludge excessive deposition caused by the sludge excessively deposited on the upper part of the mesh network in the present facility is periodically cleaned through the washing apparatus of FIG.;High concentration organic wastewater, fine air, autism, carrier layer, nitrogen removal efficiency, mesh network, air volume increase, perforated plate, funnel, foam suppression layer