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Biological filter

A biological filter and microbial technology, applied in the direction of filtration and separation, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problem of low removal efficiency of sulfur compounds

Inactive Publication Date: 2007-01-17
BIOREM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this biofiltration media has better structural and biological properties relative to wood-based media products, it still suffers from some of the above-mentioned problems and, in particular, the removal efficiency for reduced concentrations of sulfur compounds remains relatively low

Method used

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Embodiment Construction

[0035] Biological filter system

[0036] figure 1 A schematic diagram of a biofilter system 10 according to a specific embodiment of the present invention is shown. The biofilter system 10 includes a housing 12 containing a biofilter medium 14 . The housing 12 includes a humidification chamber 16 adjacent an inlet 18 through which the contaminated gas stream enters the housing 12 . The housing 12 also includes an outlet 20 through which the purge gas stream exits the housing 12 . A water delivery system 22 is provided on the housing 12 to provide the required humidity (water and / or steam) to the biofilter medium 14 . The water delivery system 22 includes a water inlet 24 for inputting water for generating steam or soaking the biofilter medium 14 . A steam generator 26 may be connected to the water inlet 24 to generate steam (when required) and feed the steam into the inlet 18 or humidification chamber 16 . Additionally, an infiltration conduit 28 may be connected to the w...

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Abstract

A biofilter media including grains having a hydrophilic nucleus and a hydrophobic coating, the hydrophobic coating includes microorganisms and also includes a metallic agent that both assist in the efficient breakdown of hydrogen sulfide (H2S), other sulfur based compounds, such as reduced sulphur compounds, and both chlorinated and non-chlorinated volatile organic compounds. The metallic agent also increases efficiency during start-up of the biofilter media and in shock-loading conditions. The biofilter media is housed in a biofilter system that includes elements for the irrigation and humidification of the air stream of the biofilter media by steam or spray to ensure that the biofilter media is operating at appropriate temperature and moisture levels to avoid buildup of biomass or chemical deposits.

Description

technical field [0001] The present invention relates to a biofilter system for filtration and air or gas purification, and in particular to a medium for biological filtration ("biofilter medium"). Background technique [0002] As we all know, many municipal engineering and industrial production, including wastewater treatment, food processing, petrochemical product refining, papermaking, oil refining and composting process, will produce a variety of waste gases, such as hydrogen sulfide (H 2 S). h 2 S is a very smelly, toxic and corrosive gas pollutant, if in high concentration H 2 S, people experience adverse health reactions such as headaches, nausea, eye irritation, paralysis and even death. [0003] Usually, H 2 The maximum safe exposure limit for S gas is about 10 ppm, however, the gas detection threshold is about 0.47 ppb. Considering the safe exposure limits and the fact that smaller amounts can be detected, there are concerns in many parts of the world about the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/02B01D53/52B01J20/20B01J20/22B01J20/28B01D53/85B01D39/04B01J20/32C12S5/00
CPCB01J20/20B01J2220/42B01J20/3204B01J20/3021B01J20/3078B01D2257/304B01J20/2803B01J20/3293B01J20/324B01J20/3236B01D53/85B01J20/3289B01J20/165B01J20/3238B01J20/32B01J20/3028B01J20/3242B01J20/3223Y02A50/20
Inventor 扎如克·M.·沙利夫迪恩布赖恩·P.·赫尔纳
Owner BIOREM TECH
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