Novel tunnel type fixed bed reactor for sewage treatment

Abstract

The invention discloses a novel tunnel type fixed bed reactor for sewage treatment, and belongs to the technical field of sewage treatment. According to the technical scheme, the fixed bed reactor is provided with a water inlet and a water outlet, a plurality of filler assemblies are fixedly installed in the fixed bed reactor, and the filler assemblies are immersed in sewage; the filler assembly comprises a plurality of biological fillers, each biological filler is provided with a channel, an aerobic biological membrane grows on a water inlet section on the inner wall of each channel, and an anoxic biological membrane grows on a water outlet section on the inner wall of each channel; the filler assembly is formed by connecting a plurality of biological fillers in parallel, or connecting a plurality of biological fillers in series to form a biological filler group and then connecting a plurality of biological filler groups in parallel; an aerator is mounted on the side surface of the bottom of the filler assembly. The fixed bed reactor disclosed by the invention can realize the effects of aerobically removing organic matters, nitrifying and denitrifying nitrogen removal and the like without partitioning, the treatment efficiency is greatly improved, an internal reflux device is not needed, the process unit combination is reduced, and the device cost and the operating cost are reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a novel tunnel-type fixed-bed reactor for sewage treatment. Background technique [0002] Biofilm method is a kind of sewage biological treatment technology parallel with activated sludge method. It is a fixed membrane method and is mainly used to remove soluble and colloidal organic pollutants in wastewater. Treatment technologies include biological filters (ordinary biological filters, high-load biological filters, and tower biological filters), biological turntables, biological contact oxidation equipment, and biological fluidized beds. [0003] In process application, the removal of organic matter mainly relies on the oxidation and decomposition of microorganisms under aerobic conditions, while the treatment of ammonia nitrogen and total nitrogen mainly requires the cooperation of nitrifying bacteria under aerobic conditions and denitrifying bacteria under anoxic con...

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Problems solved by technology

[0007] 1. It is difficult for the filler in the traditional process tank to ensure the uniform flow of sewage without the aid of a stirring device, and it is prone to local short flow and other conditions that affect the treatment effect; however, under the impetus of the agitator, the filler in the flowing state is still prone to the pool body The corners are piled up and cannot participate in the normal treatment process; the traditional fixed bed process usually uses small pieces of carrier as filler, the flow rate of sewage is slow, the mass transfer efficiency of biomass is low, and there may be uneven flow rate distribution in the radial direction, which is easy to produce Channel flow, short flow; 2. The traditional fixed bed process uses small pieces of carrier filling as filler, and the bed resistance is relatively high, which is particularly prone to clogging; due to the lack of effective film removal mechanism, the aging organisms attached to the filler in the traditional process The membrane is difficult to fall off. In order to ensure the treatment efficiency after a period of time, the filler needs to be replaced, which leads to an increase in construction and maintenance costs; 3. The flow state filler used in the traditional process has a risk of loss. If an effective interception net cannot be installed, it is easy to cause the filler With the water loss or even block the pipe or damage the subsequent unit equipment

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