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Method used for preparing solid waste building material products based on microorganism mineralization induction technology

A solid waste and microbial technology, applied in the field of microbiology, can solve problems such as slow process, achieve the effects of increased strength, stable mineral properties, and slow down the greenhouse effect

Active Publication Date: 2016-04-13
SOUTHEAST UNIV
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Problems solved by technology

But in nature, the ore carbonation process occurs naturally, and the process is very slow

Method used

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  • Method used for preparing solid waste building material products based on microorganism mineralization induction technology
  • Method used for preparing solid waste building material products based on microorganism mineralization induction technology
  • Method used for preparing solid waste building material products based on microorganism mineralization induction technology

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[0029] (1) Obtain the concentrated bacterial liquid of Bacillus colioids: Inoculate Bacillus colioids into the sterilized medium solution, each liter of medium contains 7g of peptone, 6g of beef extract, 7g of NaCl, 18g of agar, MgSO 4 0.7g, and control the pH to be 7-8, shake and culture at 32°C for 24 hours to obtain the bacterial liquid containing Bacillus colloidus, centrifuge at 6000-8000rpm at 4°C for 15min, remove the nutrients in the upper layer of the culture medium and add Deionized water, the concentration of bacteria contained in the concentrated bacteria solution is 10 6 ~10 7 individual / mL.

[0030] (2) Mix 500g steel slag with 100g activator Ca(OH) 2 Mix, pour into a stirring pot and stir evenly, add 100ml of concentrated bacterial liquid and 200ml of water into the stirring pot, continue stirring until uniform, add 1500g of sand and continue stirring, after stirring evenly, pour the slurry into the mold and vibrate forming.

[0031] (3) After molding, place...

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Abstract

The invention discloses a method used for preparing solid waste building material products based on microorganism mineralization induction technology. The method comprises following steps: a corresponding culture medium is inoculated with bacillus mucilaginosus for culturing, and a concentrated bacteria solution with a bacteria concentration ranging from 10<6> to 10<7> / ml is prepared; solid waste is mixed with an exciting agent, an obtained mixture is delivered into an agitator kettle for uniform sitting, the concentrated bacteria solution and water are added into the agitator kettle, after uniform stirring, sand is added, stirring is carried out continuously, and after uniform stirring an obtained slurry is delivered into a mould for vibration molding; after molding, obtained test pieces are subjected to curing at a relative humidity ranging from 57% to 63% at a temperature ranging from 18 to 22 DEG C; demolding is carried out in 1 day, and the test pieces are delivered into a pressure kettle for 4h of curing at a relative humidity ranging from 67% to 73% under CO2 pressure so as to obtain the solid waste building material products. The method is low in cost, and excellent in effect, and is friendly to the environment, and no secondary pollution is caused.

Description

technical field [0001] The invention belongs to the interdisciplinary science and technology in the fields of microbiology and material science, and relates to a microbial method for preparing solid waste building materials based on microbial mineralization induction technology. Background technique [0002] In recent years, with the rapid development of the national economy, the solid waste generated in the industrial production process has increased year by year. If these solid wastes are not comprehensively utilized in a reasonable way, it will inevitably cause many harms to the social environment, such as occupying land , air pollution, waste of resources, etc. One of the most extensive and effective ways to utilize solid waste as a resource is to use it as building materials. The main active mineral composition of solid waste is C 2 S, C 3 S, C 4 AF and RO phases (solid solutions formed by oxides of Mg, Fe, Mn, etc.), etc., are similar to cement components, but the u...

Claims

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Application Information

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IPC IPC(8): C04B40/00C04B18/16
CPCY02W30/91
Inventor 钱春香伊海赫王凯
Owner SOUTHEAST UNIV
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