Integrated sewage treating apparatus combining biological filter tower and underground percolation

Abstract

The integrated sewage treating apparatus consists of two parts of ground trickling filtration tower and underground percolation system. The trickling filtration tower with ventilation port has filled stuffing as the biological film growth carrier, water distributing plate in the top, isolating net in the bottom and water outlet pipe connected to the water distributing pipe in the underground percolation system. The underground percolation system has water outlet pipe buried in the bottom gravel layer, anaerobic tank buried in the upper soil, and underground percolating water distributing pipe buried in the gravel layer in the upper part of the anaerobic tank. In the trickling filtration tower, the sewage has most ammonia nitrogen converted into nitrate nitrogen and most of BOD degraded; in the underground anaerobic tank, the residual suspended grains are intercepted and nitrate nitrogen is denitrified; and the sewage is further percolated and deep treated.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to an integrated sewage treatment device composed of a ground biological filter tower and an underground infiltration system, belonging to the technical field of environmental engineering sewage treatment. Background technique [0002] my country is a country that lacks water resources. However, with the rapid development of my country's economy, the problem of water pollution has become increasingly prominent. Inland rivers in major cities have been polluted to varying degrees. Black and gray odors occur frequently. A large area of ​​toxic blue-green algae blooms have occurred year after year. [0003] Most of the traditional secondary urban sewage treatment plants use the activated sludge method to treat sewage. This method has limited effect on the removal of nitrogen and phosphorus, the main limiting factors leading to eutrophication in water bodies. The one-time construction investme...

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Problems solved by technology

The purpose of this invention is to improve the water distribution effect and improve the anti-clogging performance of the soil, but its structure has a limited effect on improving the oxygen supply capacity of the system

[0005] The Chinese patent with the publication number CN1405096A aims at the problem that the removal rate of nitrogen in the underground infiltration method is not high. A certain amount of raw sewage is introduced into the infiltration diffusion layer under the water distribution pipe to provide sufficient organic carbon sources to promote denitrification efficiency, but this This method increases the difficulty of operation and is inconvenient to manage

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