Multi-level circulation aerobic treatment technology

Abstract

Multi-level circulation aerobic treatment technology belongs to waste water treatment technology. The invention provided technology is: 1) each level aerobic reaction device uses upper-lower layer mode to divide the device into upper and lower two parts, the lower part uses traditional fan to aerate, the upper layer uses surface to aerate and pushes water stream to form a circular flow; 2) uses multi-level aerobic reaction device combination mode to form multi-level circulation aerobic reaction. The invention has high operation stibility and strong resistance to impact load; uses a combined circular areation mode of upper-level layers to aerate at the same time, and surface aeration pushed water flow, to promote phase contact of mass transferphase interface alternation, and provides good motion conditions for biochemical reactions of activated sludge organic substrage and oxygen, acclerates reaction speed and improves waste water treatment efficiency; liquid flowing speed in system approaches 0.3-0.5 m / s, high oxygen utilization ratio, strong biochemical reaction, fast microorganism metabolism, high sludge activity, short hydraulic retention time; and removing ratio of pollutants are improved 20-30% comparing with the former aerobic treatment method.

Description

technical field [0001] A new type of aerobic treatment technology-multistage circulation aerobic treatment technology belongs to the technical field of wastewater treatment. Background technique [0002] Water pollution and water shortage are two major problems facing the world. At present, the total annual sewage discharge in my country is 39.5 billion m 3 , according to predictions, by 2050, my country's total sewage discharge will be as high as 120 billion m 3 . [0003] With the acceleration of my country's economic development and urban construction, the urban population has grown rapidly, and the water consumption for production and living has increased sharply. The substantial increase in the discharge of urban sewage and wastewater is bound to pose a serious threat to the quality of the water environment. Therefore, research on the treatment of wastewater has become an urgent problem to be solved. [0004] Aerobic treatment is an important method of wastewater t...

AI Technical Summary

Problems solved by technology

However, if the concentration of pollutants in the wastewater is high or the pretreatment effect is not ideal, the organic matter load at the front end of the biofilm method is relatively high, which makes the oxygen supply relatively insufficient. At this time, the biological contact oxidation tank does not play its due role, and the treatment effect not ideal