Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process for biological oxidation treatment of gaseous pollutant

A technology of biological oxidation and treatment methods, applied in chemical instruments and methods, separation methods, air quality improvement, etc. The problem of high load, to achieve major market development prospects, overcome the effects of small biomass and high mass transfer efficiency

Inactive Publication Date: 2006-01-25
ZHEJIANG UNIV OF TECH
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technologies have their own characteristics. For example, the biological washing bed has good absorption, but the biomass per unit volume is small and the processing load is low, so it is rarely used at present; the biological filter bed can have a large processing capacity and is easy to manage and maintain, but it is artificial Poor controllability and short service life; the biological trickling filter bed can be adjusted in time through the circulation of nutrient solution, and the treatment load is high, especially suitable for halogenated hydrocarbon gaseous pollutants, but there are problems such as packing bed and circulation system blockage
Moreover, a common problem of biological filtration systems (including trickling filtration) is that the pollution load, nutrients, water and biomass on the packing layer are unevenly distributed, so that the organisms responsible for the decomposition of pollutants are always in a "subactive" state. , which directly affects the processing efficiency of the system
The patent application unit found in the research process of biological trickling filter bed purification treatment of dichloromethane that when the concentration of imported dichloromethane is 1000mg / m 3 , EBRT20s, the removal efficiencies of 24PPC, 18PPC and 8PPC Carbon Foam three kinds of biological trickling filter beds are about 50%, 42% and 34% respectively.
In addition, the packing bed and nutrient solution circulation system are seriously blocked

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for biological oxidation treatment of gaseous pollutant
  • Process for biological oxidation treatment of gaseous pollutant
  • Process for biological oxidation treatment of gaseous pollutant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The embodiment and working principle of the present invention are: containing dichloromethane 0.75g / m 3 , 1.00g / m 3 , 1.25g / m 3 , 1.50g / m 3 , 1.75g / m 3 Waste gas biological contact oxidation tower treatment process, the tower has built-in combined biofilm packing, the nutrient solution is immersed in the entire biofilm packing, the waste gas containing methylene chloride enters from the bottom of the tower, forms tiny bubbles through the aeration diffuser, and the biofilm on the packing Fully contact with the liquid biofilm to complete the mass transfer from the gas phase to the liquid phase and then to the biofilm. Finally, under the action of biological oxidation and decomposition, the compound is oxidized and decomposed into CO 2 、H 2 O and other simple compounds to achieve the purpose of exhaust gas purification. The empty tower residence time (EBRT) is 15s, the pH value of the liquid phase is 6.0-7.0, and the temperature is 25-35°C. The waste gas treatment res...

Embodiment 2

[0026] Embodiment of the present invention and principle of work are: other conditions are the same as embodiment 1, empty tower residence time (EBRT) is 10s, liquid phase pH value 6.0~7.0, temperature 25~30 ℃, treatment result sees table 2.

[0027] Table 2 Dichloromethane waste gas treatment results

[0028]

[0029] The results in Table 2 show that the biological contact oxidation waste gas treatment process of the present invention can effectively treat waste gas containing methylene chloride, and the removal rates of methylene chloride are 100%, 97.7%, 94.5%, 90.3%, and 83.1%, respectively.

Embodiment 3

[0031] Embodiment of the present invention and working principle are: other conditions are the same as embodiment 1, empty tower residence time (EBRT) is 20s, liquid phase pH value 6.0-7.0, temperature 25-35 ℃, treatment result sees table 3.

[0032] Table 3 Dichloromethane waste gas treatment results

[0033]

[0034] The results in Table 3 show that the biological contact oxidation waste gas treatment process of the present invention can effectively treat waste gas containing methylene chloride, and the removal rates of methylene chloride are 100%, 100%, 98.8%, 97.1%, and 94.3%, respectively.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A bio-oxidizing process for treating the gas-state pollutant degradable to microns includes such steps as providing a biologic contact oxidizing tower, loading the filler with biologic film in it, filling nutritive liquid to immerse said filler in it, and making the gas-state pollutant flow through the oxidizing tower to decompose the pollutant into CO2, H2O and other simple compounds. Its advantages are high treating capacity and high mass-transfer efficiency.

Description

(1) Technical field [0001] The invention relates to a biological oxidation treatment method for gaseous pollutants in environmental biotechnology. (2) Background technology [0002] The biological oxidation treatment technology of gaseous pollutants is becoming a high-tech that is rapidly promoted in the field of purification of gaseous pollutants, especially in the field of In the treatment of organic waste gas and malodorous gas with lower concentration and larger volume. Compared with some developed countries abroad, although my country has a certain research foundation, its practical application is still in its infancy. [0003] At present, there are three main types of research and application of gaseous pollutants biological treatment technology, namely biological scrubber, biological filter bed and biological trickling filter bed. These technologies have their own characteristics. For example, the biological washing bed has good absorption, but the biomass per unit ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D53/85
CPCY02A50/20
Inventor 王家德陈建孟
Owner ZHEJIANG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com