WASTEWATER TREATMENT DEVICE CAPABLE OF RECOVERING GRANULES OF ACTIVE MICROORGANISMS USING SEPARATION MEMBRANE AND METHOD FOR TREATING WASTEWATER

摘要

The present invention relates to a process for maximizing the recovery of the granules of active microorganisms and obtaining the stable quality of treated water in the process of treating sewage and wastewater. For the purpose, the present invention comprises a granule recovery tank and a separation membrane tank separately, wherein the granules of microorganisms exhibiting high activity and non-active solid substances are rapidly separated, and the granules are returned to a reaction tank to secure high-concentration granules in the process, and non-precipitated inactive solid substances are made to flow into the separation membrane tank and subjected to filtration to obtain excellent treated water. A step of decomposing pollutants removes nitrogen and phosphorus in a bioreactor that is divided into an anaerobic tank, an anoxic tank and an aerobic tank in order. The granules of heterotrophic microorganisms are recovered from inactive solid substances and treated water in granule recovery tank 1 and returned to the fore-end of the anaerobic tank, and the inactive solid substances separated from the heterotrophic microorganisms and treated water are transferred to the aerobic tank. The granules of autotrophic microorganisms are recovered in granule recovery tank 2 at the rear end of the aerobic tank and returned to the fore-end of the aerobic tank, and the separated inactive solid substances and treated water are transferred to the separation membrane tank to separate the inactive solid substances from the treated water in the separation membrane tank.;COPYRIGHT KIPO 2014