Self-oxygenation biological filter bed for sewage treatment

Abstract

The invention discloses a self-oxygenation biological filter bed for sewage treatment. The self-oxygenation biological filter bed comprises an anaerobic catchment pretreatment system, an automatic oxygenation aerobic biological filter bed system and an anaerobic undercurrent ecological solid phosphorus system which are connected in sequence, wherein the automatic oxygenation aerobic biological filter bed system comprises a filter bed tank body, an aerobic biological filter material, a sewage distribution device laid on the surface of the aerobic biological filter material, a tunnel type air diffusion device embedded at the bottom of the aerobic biological filter material and a plurality of vertical air draft pipes communicated with the tunnel type air diffusion device; the filter bed tank body is filled with the aerobic biological filter material; the anaerobic undercurrent ecological solid phosphorus system comprises a solid phosphorus system tank body, a second catchment distributing well, a catchment outlet well, an anaerobic biological filter material and a phosphorus fixing agent; the second catchment distributing well and the catchment outlet well are respectively arranged on the water inlet side and the water outlet side of the solid phosphorus system tank body; the anaerobic biological filter material and the phosphorus fixing agent are arranged in the solid phosphorus system tank body in the sewage push flow direction. The self-oxygenation biological filter bed has the advantages of being free from power operation, low in possibility of blockage, high in seasonal adaptability, high in denitrification and phosphorus removal efficiency and easy to manage and maintain and wide in application range.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a self-oxygenating biological filter bed for sewage treatment. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of people's living standards, the discharge of domestic sewage is increasing significantly year by year. In 1999, the discharge of domestic sewage exceeded the discharge of industrial wastewater for the first time in the country, and the discharge of domestic sewage pollutants ranked first, becoming the main source of pollution. The massive discharge of domestic sewage has caused serious pollution of surface water bodies, directly threatening the health of the people and the safety of drinking water. Some rural domestic sewage treatment facilities and urban sewage treatment plants are also unable to operate normally or the quality of effluent water is poor due to technical and treatment cost proble...

AI Technical Summary

Problems solved by technology

However, the current biological filter bed treatment technology is mainly used in the secondary biological sewage treatment section, which has the following disadvantages: ① The biological filter bed needs strong aeration, and the power loss is large; Troublesome and difficult; ③There are many auxiliary facilities and high investment and operation costs, which limit its application in rural domestic sewage treatment and advanced treatment of tail water in urban sewage treatment plants

Although artificial wetlands have been improved many times, there are still some shortcomings: ①Constructed wetlands are mostly operated in anaerobic mode, and the treatment effect is not ideal; ②The seasonal adaptability is not strong, and it is greatly affected by temperature, and most aquatic plants wither in winter After that, the treatment efficiency is greatly reduced, and the quality of effluent water is deteriorated; ③ There are many suspended solids in general domestic sewage. After entering the constructed wetland, it is easy to cause gap blockage, and after long-term operation, the surface soil of the wetland will be compacted, resulting in blockage and a decrease in treatment efficiency.

The roof of the pool in this invention uses perforated pipes for water distribution, which can easily cause uneven water distribution and blockage

When the wetland plants are lodging, they tend to accumulate on the water distribution pipes, which can easily cause the water distribution pipes to deform or break under pressure, and when the water is distributed, the odor will escape and affect the surrounding environment, causing secondary pollution; The material is hardened and the water passing performance is reduced, thereby affecting the effect of oxygenation and sewage treatment; the design of the ventilation device only considers the oxygenation at the bottom and one direction, and the oxygenation effect is relatively poor; the ventilation pipe has no air volume adjustment function and protection device, Effective air volume control cannot be carried out, and at the same time, plant leaves and other sundries are easy to fall into the ventilation duct, causing the ventilation duct to be blocked

At the same time, the bottom layer uses baffles to baffle the water, which is easy to form a large number of dead angles, and the effective utilization rate of the filter is low.

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