Absorption-biological treatment method for malodorous gas

A biological treatment and exhaust gas technology, applied in the field of malodorous exhaust gas absorption-biological treatment, can solve the problems of complex operation, large investment, secondary pollution, etc.

Inactive Publication Date: 2011-07-20
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical and chemical treatment has problems such as large investment, complicated operation, high operating cost, and easy to produce secondary pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Absorption-biological joint treatment of malodorous waste gas from aquatic feed

[0015] The malodorous waste gas produced by the aquatic feed during the curing and drying process is organized. The components of these malodorous waste gas include trimethylamine, ammonia, hydrogen sulfide, styrene, dimethyl disulfide, dimethyl trisulfide, benzylamine, and carbon disulfide. , Dimethyl sulfide, carbonyl sulfide, etc. Exhaust gas temperature: 70-80°C. The biological trickling filter device was inoculated and film-coated with special bacterial strains for purification of odor and waste gas from aquatic feed. In Zhanjiang Yuehua Aquatic Feed Co., Ltd., a 154-day test run was conducted on the long-term operation stability of the malodorous waste gas absorption-biological purification engineering device for aquatic feed, during which the device showed good operational stability. The residence time is 11.73s, and the purification efficiency of ammonia is generally s...

Embodiment 2

[0016] Example 2: Absorption-Biotechnology Treatment of Malodorous Waste Gas Containing Trimethylamine

[0017] In order to solve the problem of odor pollution caused by organic amines in the exhaust gas, the experimental method of treating trimethylamine odor exhaust gas with a bio-trickling filter tower with domesticated strains of membrane-coated special domesticated bacteria for odor exhaust gas purification, the purification efficiency of trimethylamine is over 99.9%, and the exhaust gas after purification It can meet the national secondary emission standard.

Embodiment 3

[0018] Example Three: Absorption-Biotechnology Treatment Containing H 2 S and NH 3 malodorous exhaust gas

[0019] The biological trickling filter tower with domesticated bacteria hanging on the film for the purification of malodorous exhaust gas is effective against H 2 S and NH 3 Both pollutants have strong degradation ability, and H 2 Purification of S than NH 3 Purification is easier, H 2 S can achieve 100% removal rate; while NH 3 The purification efficiency is maintained above 99.9%, which can achieve standard discharge.

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PUM

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Abstract

The invention relates to an absorption and biological treatment method of malodorous waste gas. The malodorous waste gas enters a spray absorption tower to have an absorbing, humidifying and cooling function, and then enters into a biological dripping and filtrating device and contacts with a biological film attached to the surface of the filler in the process of rising to be degraded into odorless compounds, and then the purified gas is discharged. The residence time of a vacant bed is 11 to 45 seconds. Part of the waste water produced when spraying and absorbing can be used as biological circulating water, which can be reused again as spraying water after the biochemical treatment. The absorption and biological treatment method of the invention can effectively remove the odor polluting matters such as organic amine, ammonia gas, hydrogen sulfide, mercaptan type, dimethyl sulfide (DMS), dimethyl disulfide (DMDS), styrene, volatile organic compounds (VOC), dimethyl trisulfide, benzylamine, carbon disulfide, carbonyl sulfide, etc. and all kinds of malodorous smells, most of which are poisonous and a plurality of which are carcinogens. The deodorization effect can reach 99 percent, which can discharge by reaching the standard and can be applied to a deodorization and purification treatment of the large-capacity matters polluted by different malodorous gas with low concentration.

Description

technical field [0001] The invention relates to an absorption-biological treatment method of malodorous waste gas. technical background [0002] The stench problem is a hot spot for residents' complaints, and domestic calls for the prevention and control of stench pollution are getting louder and louder. Stench is one of the seven typical public hazards, endangering people's health and the peace and comfort of life. Stench gas can not only bring people olfactory discomfort, but also cause anorexia, insomnia, and memory loss if they live in a foul-smelling environment for a long time. , irritability and other functional diseases. The stench affects the human respiration, digestion, cardiovascular, endocrine and nervous systems. High concentrations of stench can also cause pulmonary edema and even death by suffocation. Due to the impact of odorous substances, people's normal production and life are disturbed, and work efficiency is reduced, which leads to the deterioration ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14B01D53/84
CPCY02E50/343Y02A50/20Y02E50/30
Inventor 魏在山
Owner SUN YAT SEN UNIV
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