WASTEWATER DISPOSAL METHOD USING TWO-WAY OXYGEN SUPPLY HORIZONTAL-FLOW BIOFILM AND EQUIPMENT THEREOF

摘要

A wastewater disposal method using a two-way oxygen supply horizontal-flow biofilm includes the following steps: a. wastewater entering an intake water tank; b. the wastewater entering a biofilm reactor, in which a surface layer of the biofilm has a large contact with air and has sufficient oxygen, so that microorganisms undergo aerobic respiration, a carrier is formed of a permeable material, oxygen is supplied to the biofilm from the bottom layer of the biofilm adjacent to the surface of the carrier, so as to achieve a mode of simultaneously supply oxygen from the surface layer and the bottom layer of the biofilm, and the biofilm has a high aerobic activity, when the biofilm reaches a certain thickness, a hypoxic or anaerobic layer is formed at the middle layer of the biofilm and facilitates the removal of pollutants such as nitrogen and phosphorous compounds in the wastewater, at the same time an aged biofilm falls off from the carrier as the adhesion reduces, and the fallen biofilm, under the effect of the water flow, is collected together with the discharged water; and c. the discharged water flowing into a water collection tank. Wastewater disposal equipment using a two-way oxygen supply horizontal-flow biofilm includes a water intake system, a reaction system and a water discharge system. By means of an anaerobic, hypoxic or aerobic disposal process using a two-way oxygen supply multi-layer horizontal-flow biofilm, the current problem of small-scale wastewater disposal in suburban and urban areas is solved.