A low-ph waste gas biological purification reactor and its waste gas treatment process

Abstract

The invention relates to a low pH biological purification reactor and a waste gas treatment process. The internal part of the biological purification reactor is a partition type structure composed of an anaerobic reaction zone, a strong acid biological reaction zone and a weak acid biological reaction zone. Two gas distribution plates respectively connect the anaerobic reaction zone and the strong acid biological reaction zone and the weak acid biological reaction zone, and the gas distribution plates are is provided with gas-liquid communication holes. The side wall of the lower part of the anaerobic reaction zone is provided with a gas inlet, and a perforated pipe is arranged on the side wall of the lower part of the anaerobic reaction zone, a light suspended filler is filled in the anaerobic reaction zone, and the side wall of the upper part of the anaerobic reaction zone is provided with a water draining port; the strong acid biological reaction zone is filled with a strong acid resistant inert filler, and the pH maintains at 2.0-4.0; the weak acid biological reaction zone is filled with a weak acid resistant inert filler, the pH maintains at 4.0-6.0, and the side wall is provided with a gas outlet. Water soluble components in waste gas are removed in the anaerobic reaction zone, components which are not degraded are thoroughly degraded respectively in the two reaction zones by acidophilic sulfur bacteria and fungi in the fillers, and purified gas is discharged from an exhaust port.

Description

technical field [0001] The invention belongs to waste gas treatment equipment using a waste gas bioreactor, in particular to a low-pH biological purification reactor and a waste gas treatment process thereof. Background technique [0002] In various industrial production processes such as sewage treatment, garbage treatment, composting, paint, resin, shoemaking, chemical industry, etc., some waste gas containing volatile organic or inorganic substances will pollute the surrounding environment, which is harmful to human health and the ecological environment. cause serious harm. At present, the control of air pollution and waste gas has attracted more and more attention. [0003] For waste gas containing volatile organic compounds, traditional treatment methods mainly include chemical absorption, physical adsorption, and catalytic oxidation. Compared with conventional physical and chemical purification technologies such as absorption, adsorption, catalysis, and incineration,...

AI Technical Summary

Problems solved by technology

However, for hydrophobic substances, the water layer on the surface of the bacteria will affect the mass transfer rate, resulting in lower treatment efficiency

In addition, ordinary bacteria are also difficult to adapt to the acidic environment caused by the biodegradation of sulfur-, chlorine-, or nitrogen-containing pollutants

[0006] Conventional exhaust gas biological treatment equipment is often operated under a single neutral pH condition, and there are few types of microorganisms growing on the filler, so the types of substances removed and the removal capacity are limited

Gas substances containing sulfur, chlorine or nitrogen, and high-concentration volatile organic compounds will be acidified during the biological purification process, which will significantly reduce the pH in the reactor and cause a decline in the treatment performance of the single-type waste gas purification treatment reactor. The pH is usually adjusted by adding alkali, etc., so the effect of the above-mentioned equipment is unstable and the operation is complicated.

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