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Biological removal method of siloxane in biological energy source gas

A technology of bio-energy and siloxane, applied in separation methods, chemical instruments and methods, air quality improvement, etc., to achieve improved removal effect and easy reproducibility

Inactive Publication Date: 2013-05-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention mainly adopts biological method to solve the problem of removing siloxane in bioenergy gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Transfer Pseudomonas H4 (preserved by Tianjin University of Science and Technology Microorganism Culture Collection Management Center, No. TCCC10026) into LB medium from the preservation slant, and shake culture at 30°C for 12-16 hours to prepare seed liquid; 10% of the inoculum was inoculated into LB medium containing 0.1-0.5% siloxane, and cultured with shaking for 24-18 hours.

[0026] The obtained culture solution of Pseudomonas H4 was mixed with the culture medium of the trickling filter tower according to the ratio of 10:1, and the mixed solution was used to soak the tower. After soaking for one day, the culture medium was circulated, and after a week of circulation, the membrane was successfully formed, and the culture medium was replaced twice during this period.

[0027] Pass the simulated gas containing siloxane into the trickling filter tower after the successful film formation, and the simulated gas contains siloxane 25mg / m 3 , Velocity 10m 3 / h; the flow ...

Embodiment 2

[0029] Transfer Pseudomonas H4 from the preservation slant into LB medium, shake and culture at 30°C for 12-16 hours, and prepare seed liquid; inoculate the seed liquid with 10% inoculation amount into siloxane containing 0.1-0.5% In the LB medium, shake culture 24-18h.

[0030] The obtained culture solution of Pseudomonas H4 was mixed with the culture medium of the trickling filter tower according to the ratio of 5:1, and the mixed solution was used to soak the tower. After soaking for one day, the culture medium was circulated, and after 4 days of circulation, the membrane was successfully formed, and the culture medium was replaced twice during this period.

[0031] Pass the simulated gas containing siloxane into the trickling filter tower after the successful film formation, and the simulated gas contains siloxane 60mg / m 3 , Velocity 8m 3 / h; the flow rate of the circulating liquid is 3L / h. After passing through the simulated gas for one week, the concentration of siloxa...

Embodiment 3

[0033] After utilizing the method of embodiment 1 to hang film successfully, pass into the simulated gas containing siloxane in the trickling filter tower, contain siloxane 50mg / m in the simulated gas 3 , Velocity 5m 3 / h; the flow rate of the circulating liquid is 2L / h. After passing the simulated gas for one week, the concentration of siloxane in the outlet gas is detected, and the calculated removal rate reaches 52.4%.

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Abstract

The invention relates to a biological removal method of siloxane in a biological energy source gas. The biological removal method comprises the following steps of: transplanting pseudomonas H4 into an LB (Luria Broth) culture medium from a preservation slope, and carrying out shaking culture at 30 DEG C to prepare a seed solution; inoculating the seed solution into an LB culture medium containing 0.1-0.5 percent of siloxane at an inoculum size of 10 percent, and carrying out shaking culture for 18-24 hours; mixing the LB culture medium with a culture medium for a bio-trickling filter according to a proportion of 10: 1, and soaking the bio-trickling filter for one day; then, circulating a soak solution at a flow speed of 1-10L / h to enable the pseudomonas to uniformly grow on ceramsite, and circularly culturing for one week to finish biofilm culturing; and introducing a siloxane-containing gas into the bio-trickling filter at a flow speed of 1-10m<3> / h; and culturing the culture solution, and replacing 1 / 3 of the culture solution every other week so as to supplement the fresh culture medium. The biological removal method can be used for improving the siloxane removal efficiency to above 50 percent and is small in equipment size and occupying area during industrial application and capable of basically realizing industrial application.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to a biological removal method for siloxane in bioenergy gas. Background technique [0002] Polysiloxane is a general term for a class of silicones widely used in the production of industrial products and daily necessities. Polysiloxanes are hydrolyzed to produce low molecular weight volatile methylsiloxanes, which are volatilized from sewage treatment and solid waste treatment processes. At present, activated sludge and solid waste from sewage treatment plants are used to produce bioenergy gas, and volatile siloxane will inevitably be brought into bioenergy gas. The existence of siloxane seriously affects the use of bioenergy gas. After combustion, a silicon dioxide film will be formed in the combustion chamber of the internal combustion engine, which seriously affects the thermal efficiency of the internal combustion engine and limits the use of bioenergy gas. E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/72
CPCY02A50/20
Inventor 张卫江张朝正徐姣曲萌李云辉
Owner TIANJIN UNIV
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