Catalyst for biological treatment of formaldehyde industrial wastewater

Abstract

The invention relates to a biological treatment process for organic formaldehyde industrial wastewater, in particular to a biological treatment catalyst for the industrial wastewater exhausted during production of formaldehyde, a preparation method and application thereof. The biological treatment catalyst is formed by mixing powdered zeolite, fly ash and dried substrate sludge of riverways according to certain proportion, wherein the powdered zeolite accounts for 30 to 55 weight percent, the fly ash accounts for 20 to 40 weight percent, and the dried substrate sludge of the urban riverways accounts for 30 to 50 percent. As a catalyst of the biological treatment process for the formaldehyde industrial wastewater, the biological treatment catalyst can accelerate the bacterial culture process in the biological treatment, shorten the acclimation time of strains, improve the biological treatment efficiency, and strengthen the biological treatment effect. The catalyst has good stability; and the preparation method is simple, easy and environment-friendly, has easily obtained raw materials, good reproducibility, low cost and wide application scope, does not need special equipment, and can be used for the biological treatment process for single-component organic wastewater such as formaldehyde production wastewater.

Description

technical field [0001] The invention relates to a single organic matter formaldehyde industrial wastewater biological treatment process, in particular to a catalyst for the biological treatment of industrial wastewater discharged in the formaldehyde production process and its preparation method and application. technical background [0002] Due to the lack of nutrients such as N and P in the biochemical treatment process of single formaldehyde production wastewater, the growth of microorganisms in the biological treatment system is not comprehensive, and various abnormal situations are prone to occur. For example, the biochemical debugging process of the wastewater treatment system takes a long time and has low efficiency; activity The domestication rate of sludge is low, and the removal effect of organic matter is poor; the waste water obviously inhibits the growth and reproduction of microorganisms, the number of microorganisms is small, and the species is single; the micro...

AI Technical Summary

Problems solved by technology

[0002] Due to the lack of nutrients such as N and P in the biochemical treatment process of single formaldehyde production wastewater, the growth of microorganisms in the biological treatment system is not comprehensive, and various abnormal situations are prone to occur. For example, the biochemical debugging process of the wastewater treatment system takes a long time and has low efficiency; activity The domestication rate of sludge is low, and the effect of removing organic matter is poor; the waste water obviously inhibits the growth and reproduction of microorganisms, the number of microorganisms is small, and the species is single; the adaptability of microorganisms to changes in water quality fluctuations is poor, the quality of effluent water is poor, the operation is unstable, and operation management is difficult

In order to improve the biochemical treatment effect of formaldehyde industrial wastewater, the method of supplementing domestic sewage and adding traditional N, P and other supplementary nutrients is usually used, but it is often easy to cause severe corrosion and scaling of pipelines and equipment, and the operating cost is high, making it difficult to large-scale Promote application

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