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Biodrying method of household garbage

A technology for domestic waste and biological drying, which is applied in the field of resource utilization of domestic waste, can solve the problems of late start of research and few reports, and achieve the effects of simple operation, increased economic benefits, and wide application.

Active Publication Date: 2016-10-26
CHINA AGRI UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a new technology, biological drying started relatively late in the research on domestic waste. At present, it mainly focuses on the process conditions and parameters of sludge biological drying. There are not many reports on the application of domestic waste. There are also few studies on improving the effect of biological drying

Method used

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  • Biodrying method of household garbage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The biological drying method of embodiment 1 house refuse

[0027] In this embodiment, 3 experimental treatments are set up. The control treatment (MSW) is the domestic waste without adding any carbon source to carry out the biological drying experiment alone. Combine 10% corn stalks for biological drying, and treatment 2 (MSW+WP) is to add woody peat with 10% wet weight of domestic waste to domestic waste for combined biological drying, and the materials must be fully mixed.

[0028] All treatments are stacked in a closed fermentation tank with a volume of 60L for aerobic biological drying. The ventilation method is continuous ventilation, and the ventilation rate is 0.3L·kg -1 DM·min -1 , the experiment lasted for a total of 18 days, and the stack was turned every 3 days. The bio-drying fermenter is a 60L stainless steel cylindrical tank (inner diameter 0.36m, height 0.6m). The fermenter is made of two layers of stainless steel with an insulating layer in between to...

Embodiment 2

[0037] The biological drying method of embodiment 2 house refuse

[0038] The test was carried out according to the treatment 1 of Example 1, and the corn stalks with a wet weight of 10% of the domestic waste were added to the domestic waste for biological drying. chemical products for inoculation. The ventilation rate is 0.35L·kg -1 DM·min -1 , the biological drying cycle is 15 days, and the pile is turned every 3 days. The remaining conditions are the same as those described in Example 1, and the changes in element content and calorific value of the obtained biological drying product are shown in Table 3.

[0039] Table 3 Bio-drying elements and calorific value changes

[0040]

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Abstract

The invention provides a biodrying method of household garbage. According to the biodrying method, straw type agricultural waste and / or woody peat are / is fully mixed with the household garbage, and then biodrying is carried out. According to the biodrying method for reducing the water content of the household garbage through an additional carbon resource, the simple and easily-obtained agricultural waste is adopted as an auxiliary carbon source, and the beneficial effects of being low in cost, wide in application range, easy to operate and the like are achieved; and the water content of the household garbage is remarkably reduced, the water content can be reduced by 35% by adding maize straw, and the water content can be reduced by 30% by adding the woody peat. Quite important practical significance in the household garbage transportation, treatment and disposal process is achieved, environment pollution is reduced to a certain degree, and generation of percolate and emission of harmful gas are avoided. Meanwhile, by means of the method, the heat value of biodrying products can be increased, and economic benefits can be increased. According to the method, the requirements for biodrying raw materials and process conditions are low, good environment benefits and economic benefits are achieved, and the promotional value is achieved.

Description

technical field [0001] The invention relates to the field of resource utilization of household garbage, in particular to a biological drying method of household garbage. Background technique [0002] With the rapid development of the economy and the improvement of people's living standards, the discharge of municipal solid waste (Municipal Solid Waste, MSW) is increasing day by day, and the environmental pollution is also becoming more and more serious. In addition to the increasing amount of domestic waste, the composition and properties of domestic waste have also undergone great changes, mainly manifested in the gradual increase in the content of kitchen waste, accounting for about 40% to 60%, up to 80%, resulting in The moisture content and degradable organic matter content also increase simultaneously, and the moisture content of domestic waste has reached 60% to 80%. If this kind of mixed waste with high water content is directly landfilled, it will produce a large am...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00C10L5/46
CPCC10L5/46B09B3/00B09B5/00B09B2101/02Y02E50/10Y02E50/30Y02W30/78
Inventor 李国学袁京李赟张地方王国英
Owner CHINA AGRI UNIV
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