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Preparation device and preparation method of microbial mineralization reinforced recycled aggregate

A technology for recycled aggregates and preparation devices, applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., to achieve the effects of avoiding waste, enhancing sedimentation, reducing water absorption and crushing index values

Active Publication Date: 2020-05-15
SOUTHEAST UNIV
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Problems solved by technology

[0005] Purpose of the invention: In view of the problems existing in the existing microbial mineralization and repair of recycled aggregates, the present invention provides a preparation device for microbial mineralization enhanced recycled aggregates, and based on the device provides a preparation of microbial mineralized enhanced recycled aggregates method

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  • Preparation device and preparation method of microbial mineralization reinforced recycled aggregate
  • Preparation device and preparation method of microbial mineralization reinforced recycled aggregate
  • Preparation device and preparation method of microbial mineralization reinforced recycled aggregate

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preparation example Construction

[0029] The preparation method of microbial mineralization enhanced recycled aggregate based on the device comprises the following steps:

[0030] (1) Prepare microbial culture fluid: inoculate microorganisms in microbial culture medium and cultivate, vibrate to obtain microbial culture fluid;

[0031]The microorganism culture liquid can be the culture liquid of at least one of microorganisms such as Bacillus colloidus, Bacillus pasteurianus, Bacillus subtilis and photosynthetic bacteria.

[0032] (2) Pour the microbial culture solution into the casing 100, add calcium ion solution to obtain the mixed culture solution of microorganism / calcium ion, and control its liquid level to be lower than the bottom surface of the tray 2;

[0033] The calcium ion added is calcium salt solution, such as calcium nitrate solution, and the calcium ion concentration C in the calcium salt solution is: 0<C≤7mol / L.

[0034] (3) Place the recycled aggregate on the tray 2, seal the box 100, turn on ...

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Abstract

The invention discloses a preparation device and a preparation method of a microbial mineralization reinforced recycled aggregate. The device comprises a sealable box containing a microorganism / calcium ion mixed culture solution, a supporting frame is arranged in the box, a tray for bearing recycled aggregate is placed on the supporting frame, a hole is formed in the bottom of the tray, the hole diameter is smaller than the particle diameter of the recycled aggregate, the bottom surface of the tray is higher than the liquid level of the mixed culture solution; a spraying pipeline and a spray head are arranged above the tray, a water inlet of the spraying pipeline is connected with the mixed culture solution through a water suction pump; the device further comprises a gas cylinder which iscommunicated with the interior of the box and filled with curing gas. The water suction pump is started, the mixed culture solution can enter the spraying pipeline and is sprayed out from the spray head to spray the recycled aggregate, the redundant mixed culture solution after spraying can flow into the bottom of the box from the holes in the bottom of the tray and then is recycled; meanwhile, spraying and curing can be carried out at the same time, and the problems that carbon source supply is insufficient in the spraying process and microorganism supply is insufficient in the curing processwhen spraying and curing are carried out step by step are effectively solved.

Description

technical field [0001] The invention relates to a strengthening device and method of recycled aggregate, in particular to a preparation device and method of microbial mineralization strengthened recycled aggregate, which belongs to the cross technical field of microbiology and solid waste resource utilization. Background technique [0002] In recent years, with the acceleration of my country's urbanization process, the generation of construction waste aggregates is also increasing year by year. Compared with natural aggregates, the performance of recycled aggregates is very different, such as: high porosity, high water absorption, high crushing index, etc., which limits the reuse of recycled aggregates in engineering structures. Strengthen the performance of recycled aggregate through a series of aggregate strengthening technologies, so that its performance can meet the requirements of engineering applications and be reapplied to actual projects. This can not only alleviate ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/10C04B18/16
CPCC04B20/107C04B18/16Y02W30/91
Inventor 钱春香张旋张琪卢果
Owner SOUTHEAST UNIV
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