Trickling biofilter

Abstract

The invention relates to a trickling biofilter, which comprises a water inlet pipeline (1), a water distributing system (2), a material filling module (3) and a water outlet system (4). the water inlet pipeline (1) and the water distributing system (2) are provided on the upper of the trickling biofilter, inlet water is uniformly distributed in the material filling module (3), the material filling module (3) is arranged along a vertical direction, the water outlet system (4) is provided at lowest part of the trickling biofilter to collect, backflow and discharge treated water. Compared with the prior art, the material filling module is prepared by a combination of corrugated plate and a connecting rod or one-step injection molding, a gap of the material filling module can be increased, the screened large particle size materials in sewage can be prevented to intercept on a packed bed, sewage is degraded by biochemical action of biomembrane on the surface of the material filling during dropping, shed microbial biofilms can smoothly pass through the grid structure packed bed, clogging of the packed bed can be fundamentally prevented, backwashing can be avoided as well, an operation procedure for treating sewage can be simplified.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a biological trickle bed. Background technique [0002] After more than 100 years of development of sewage biological treatment technology, the existing forms of microorganisms that play a major role in degrading pollutants are mainly divided into two types, one is the discrete and floc forms represented by the activated sludge process, and the other is One type is the existing form of biofilm represented by processes such as biofilter and biological turntable. Microorganisms exist in the form of biofilm, which can increase the concentration of microorganisms per unit volume of the sewage treatment device, thereby effectively increasing the volume load of the treatment device, improving the treatment capacity, and enhancing the ability to resist shock loads. [0003] At present, biofilm wastewater treatment technologies mainly include aerobic contact oxidation, biologic...

AI Technical Summary

Problems solved by technology

Aerobic contact oxidation (such as: patent application number CN201020237578.6) and biological aerated filter (such as: patent ZL02129618.9) are both attached to the biofilm of the carrier and submerged in the sewage, which needs to rely on mechanical blast aeration to meet the requirements of microorganisms. Oxygen demand, high energy consumption, blockage will occur during operation, and backwashing is required

Biological turntable technology (such as: patent application number CN201010235846.5), microorganisms grow on the surface of the biological turntable, relying on the mechanical rotation of the disk, so that the microorganisms are alternately in the air and in the sewage, ensuring the oxygen supply of the microorganisms, the mechanical equipment of this process is complex , the surface area of ​​the disk is small, and the processing capacity is low

The biological trickling filter relies on natural oxygen supply to meet the oxygen demand of microorganisms. The patent CN200710170419.1 effectively overcomes the shortcomings of the prior art that the treatment effect is greatly affected by the hydraulic load and the filter is easy to block. The developed backwashing high loaded biofilter

[0004] Some of the sewage treatment processes in which the above-mentioned microorganisms exist in the form of biofilm need to rely on mechanical blast aeration to meet the oxygen demand of microorganisms, which consumes a lot of energy; some have complex mechanical equipment, small disk surface area, and low treatment capacity; some Backwashing is required to avoid clogging

The existence of such problems will affect the management of sewage treatment process and energy consumption

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