Method for integrally treating malodorous gas by biofilter

Abstract

The invention relates to a method for integrally treating a malodorous gas by a biofilter. The method comprises the following steps: (1) mixing volcanic, activated carbon, decomposed mushroom residueand limestone, thus preparing composite filler; (2) piling and charging the composite filler onto a porous plate in the biofilter, thus forming a composite filler layer; (3) humidifying fresh air, introducing the humidified air into the biofilter, operating for 48 to 60 hours under the condition of room temperature, and completing starting; (4) humidifying the malodorous gas, introducing the humidified malodorous gas into the biofilter, operating for 10 to 12 hours under the condition of the room temperature, and completing acclimation; regulating the gas residence time to be 14 to 18 seconds,and continuously operating. The composite filler used in the method is not liable to collapse and compact, is long in replacement period and has good buffer ability and high stability; during treatment of the malodorous gas, starting and acclimating periods are short, a nutrient solution requires not to be additionally inoculated and supplemented, the removal effect on H2S and NH3 is good, the cost is low, the operation and maintenance are simple and convenient, and good economic benefit and good environmental benefit are obtained.

Description

technical field [0001] The invention belongs to the technical field of malodorous gas treatment, and in particular relates to a method for integrated treatment of malodorous gas by adopting a biological filter. Background technique [0002] Odor refers to the smell that can stimulate people's olfactory organs, generally cause unpleasant or disgusting feelings, and damage human health; odor pollutants generally have characteristic odorous groups, such as sulfur and sulfhydryl in sulfur-containing compounds, and oxygen-containing compounds The hydroxyl group, aldehyde group and carboxyl group in it, the characteristic odorous group interacts with the surface of the olfactory epithelial cells, forms a stimulus and transmits it to the central nervous system, thereby causing the smelly smell. [0003] Odor pollution sources are widely distributed, and mainly include the following types: agriculture and animal husbandry and its processing industries, such as livestock and poultry ...

AI Technical Summary

Problems solved by technology

The bioreactors commonly used in biofiltration technology mainly include biofilters, biotrickling filters and bioscrubbers. The first two are widely used and have similar processes. The biggest difference is that biofilters use organic fillers and do not require continuous nutrient supplementation. The operating cost is low, but the indigenous microorganisms of the organic filler take a long time to acclimate, and biodegradation is prone to occur, resulting in compaction of the filler, increased pressure loss, acidification of the filler, and reduced removal effect

The biological trickling filter uses inorganic fillers, which are inert and can maintain a low pressure drop for a long time. It has advantages in preventing the accumulation of metabolites and controlling biomass. However, since the inorganic fillers do not contain indigenous microorganisms and cannot provide nutrients for microbial growth, they need to be started. Inoculation of bacteria, slow start-up speed, continuous supply of liquid phase supplementary nutrients is required during operation, which increases the difficulty of operation and operating costs

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