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Biological treatment method and device for waste gas produced by printing and dyeing wastewater

A technology for biological treatment, printing and dyeing wastewater, applied in separation methods, chemical instruments and methods, air quality improvement, etc., to achieve the effects of less investment, good treatment effect, and advanced deodorization technology

Inactive Publication Date: 2014-03-26
HUAFANG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the absolute content of sulfur-containing pollutants is not high, they bring strong sensory pollution due to their low smell threshold, at ppm or even ppb level

Method used

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  • Biological treatment method and device for waste gas produced by printing and dyeing wastewater

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Embodiment 1

[0064] A method for the biological treatment of exhaust gas produced by printing and dyeing wastewater, comprising the following steps:

[0065] The exhaust gas pretreated in the absorption tower is subjected to two levels of biological treatment: primary biological treatment and secondary biological treatment;

[0066] The steps of the two-stage biological treatment are: pass the waste gas through the biological trickling filter bed 3 for treatment, and then pass it into the biological filter bed 5 for treatment;

[0067] Specific steps are as follows:

[0068] The exhaust gas is passed through the fan 1 into the humidifier 2, and after humidification, the exhaust gas is introduced into the biological trickling filter bed 3 through the pipeline, and is treated by microorganisms on the inner packing layer I4 of the biological filter bed 5; the waste liquid is discharged from the lower part of the biological trickling filter bed 3 The waste liquid outlet I flows out;

[0069]...

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Abstract

The invention belongs to the technical field of waste gas treatment, in particular relates to a biological treatment method for printing and dyeing waste gas. A biological treatment method for waste gas produced by printing and dyeing wastewater comprises the following steps: the first-level biological treatment and the second-level biological treatment are implemented for the waste gas which is pretreated in an absorption tower, wherein the two levels of biological treatment comprise the following steps: the waste gas is introduced in a bio-filter for treating after being treated through a biotrickling filter. The biological deodorization process has the main advantages of low investment, low operation cost, little electricity consumption, no consumption of chemical agents, no secondary pollutants, convenience for management and operation, better impact resistance and higer recovery speed after stopping the machine, can achieve the full load only requiring 2-3 days, is the most natural and greenest environmental protection technology, and is suitable for the occasions where the gas flow is high, and the concentration is low and pollutant components can be biologically degraded.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a method for biological treatment of waste gas generated from waste water in the printing and dyeing process, and also relates to a special device in the method. Background technique [0002] With the continuous improvement of my country's economic level, odor treatment has become an important environmental protection investment project in the field of environmental protection in my country. Odor gas is highly volatile, easy to diffuse, and has a strong pungent odor, which may have adverse effects on the human respiratory system, digestive system, endocrine system, nervous system and spirit. Therefore, the treatment of odor has great social value. [0003] Odor is usually due to the odor produced by compounds containing sulfur and nitrogen during their heating, decomposition, synthesis and other processes. The main harm of low-concentration odor to peopl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/72B01D53/52B01D53/48
CPCY02A50/20
Inventor 刘涛贾洪斌路恩刚李春光王海花孙臣孙东然刘宝图王旭洲冯晓迪李玉华王涛
Owner HUAFANG
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