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Biological drying treatment method for organic solid waste

A technology of organic solids and biological drying, applied in the direction of microbial treatment, biological sludge treatment, chemical instruments and methods, etc., can solve the problems of poor applicability, large floor area, high energy consumption of drying, and achieve suitability Wide range, saving energy consumption and improving thermal efficiency

Pending Publication Date: 2022-07-29
北京沃土天地生物科技股份有限公司
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Problems solved by technology

[0004] However, the existing biological drying technology generally has the problems of long cycle (20-60 days), large floor area, and high drying energy consumption. Moreover, due to the variety of raw materials and complex properties, it relies on a single technical effect such as microorganisms, stirring, or ventilation. Poor, poor applicability

Method used

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  • Biological drying treatment method for organic solid waste

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Effect test

Embodiment 1

[0033] (1) The domestic sludge is taken from the desliming workshop of a domestic sewage treatment plant in a county in Hubei Province. After being dehydrated by a high-pressure plate and frame, it is pulverized to less than 20mm, with a moisture content of 70%, a pH value of 7.23, and an organic matter content of 43.2%;

[0034](2) adding a bulking agent to the domestic sludge to obtain the first mixed material, the water content of the first mixed material is 65%, the carbon-nitrogen ratio is 30:1, and the pH value is 7.3; %) as a bulking agent, the addition ratio is 10wt% of the chemical sludge;

[0035] (3) Continue to add a microbial inoculum (Pichia pastoris 2.0×10 with a fresh weight of 1wt‰ of the mixture) 9 cfu / mL, Lactobacillus plantarum 3.5×10 9 cfu / mL, Geotrichum candidum 5.0×10 3 cfu / mL, Aspergillus grisea 1.0×10 4 cfu / mL) after stirring evenly, place it in such as figure 1 Biodrying takes place in the biodrying reactor 4 of the closed biodrying reactor system...

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Abstract

The invention belongs to the technical field of organic solid waste treatment, and particularly relates to a biological drying method for organic solid waste. The method comprises the following steps: mixing the organic solid waste with a bulking agent and a pH conditioner to obtain a first mixed material; inoculating a microbial agent into the first mixed material to obtain a second mixed material; the microbial agent comprises pichia pastoris, lactobacillus plantarum, geotrichum candidum and aspergillus glaucus; the second mixed material is placed in a closed biological drying reactor to be subjected to biological drying for 7-12 days, and intermittent ventilation, intermittent stirring, intermittent air exhaust and waste heat recovery are carried out in the biological drying process. According to the method, the problems of long time consumption, high energy consumption, large occupied area and heavy odor of a traditional drying and biological fermentation method are solved, reduction is obvious while drying is carried out, a foundation is laid for later recycling, and the method is a rapid and effective method for achieving harmlessness and recycling of organic solid waste.

Description

technical field [0001] The invention belongs to the technical field of organic solid waste treatment, and in particular relates to a biological drying treatment method for organic solid waste. Background technique [0002] With the development of society, the amount of organic solid waste is huge. At present, the main disposal methods of organic solid waste are landfill, incineration and land use, but the overall treatment utilization rate is very low. The characteristics are directly related. The moisture content of the untreated raw materials is as high as 90% or more, and the volume is large and the nature is unstable. Direct land use can easily pollute the groundwater. Direct incineration will also cause the calorific value to be too low due to high moisture content to maintain effective spontaneous combustion. A lot of auxiliary fuel is consumed. Therefore, the primary problem to solve the treatment and disposal of organic solid waste is to reduce the moisture content ...

Claims

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Application Information

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IPC IPC(8): C05F15/00C05F17/20C05F17/90C05F17/60C05F17/979C05F17/80C02F11/02C02F11/12C02F11/121
CPCC05F5/00C05F17/20C05F17/90C05F17/60C05F17/979C05F17/80C02F11/121C02F11/02C02F11/12C02F2303/02C02F2303/06C05F7/00C05F11/08
Inventor 孙敏捷张陇利彭生平
Owner 北京沃土天地生物科技股份有限公司
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