Biologic filtration method and device for purifying industrial organic waste gas

Abstract

The invention provides a biologic filtration method and a device for purifying industrial organic waste gas, which has high efficiency, less investment, low running cost and extensive application range of equipment. The method comprises the following steps: (1) the industrial organic waste gas is sprayed and processed in a spraying tower with a tap water spraying system to remove solid particles; (2) the waste gas enters a biologic trickling filtration tower filled with a biologic filler filled with a composite material for carrying out biologic filtration; inorganic salt nutrition liquid and active sludge which are stored in an aeration tank are evenly sprayed into the biologic trickling filtration tower by a pipeline and a spraying device, and the industrial organic waste gas is adsorbed, absorbed and degraded biologically by a biologic film attached to the surface of the biologic filler and the active sludge from the aeration tank; and (3) the industrial waste gas after being purified is discharged from a waste gas discharge port at the top of the biologic trickling filtration tower, and the active sludge is recirculated into the aeration tank for recycle after being regenerated. The invention has higher processing effect to various industrial mixed organic waste gases and wide application range, and the processed industrial mixed organic waste gases can reach the national emission standard or the emission standard of a manufacturer.

Description

technical field [0001] The invention belongs to the technical field of industrial waste gas treatment, and in particular relates to a biological filtration method and device for purifying industrial organic waste gas. technical background [0002] Industrial organic waste gas refers to a kind of olfactory pollution that is produced by enterprises in the production process and has volatile substances that can cause disgust or unpleasant sensations in the human body. Through the air medium, it acts on the human olfactory organs and is perceived. Industrial organic waste gas comes from a wide range of sources, including animal husbandry farms, slaughterhouses, petrochemicals, spray paint, rubber, tanneries, agricultural fertilizers, garbage disposal plants, sewage treatment plants, etc. The types of organic waste gas produced can reach tens of thousands, among which hydrogen sulfide, trimethylamine, formaldehyde, and volatile aromatic compounds such as benzene, toluene, and sty...

AI Technical Summary

Problems solved by technology

The filler used in the biological filter is an organic filler, which contains nutrients and does not need to be supplemented. Therefore, the management and daily maintenance of the equipment are convenient, but the filler has a short service life and needs to be replaced regularly.

Biotrickling filter packing has a long service life, but the packing is prone to clogging

Compared with the above two processes, the biggest advantage of the biological washing tank is that there is no problem of filler clogging, but it is not suitable for processing highly volatile substances

In fact, most of the discharge of industrial waste gas is discontinuous, and the components of the waste gas often change due to the adjustment of the production plan of the enterprise, and the concentration of the waste gas fluctuates violently at the same time, which has an adverse impact on the microbial ecosystem in the biological treatment and affects the continuous growth of functional microorganisms. Biodegradation

Utilizing the above traditional biological treatment processes cannot guarantee stable treatment efficiency under drastic changes in conditions

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