A kind of method that food waste compost is used for soil improvement

Abstract

The invention discloses a method used for improving soil with kitchen waste compost. The method comprises steps such as biochar absorption of hydrogen peroxide, kitchen waste solid-liquid separation,mixing of dipped biochar and kitchen waste residue, mixing of decomposed forestry and agricultural residues and a waste residue 2, secondary composting fermentation, forming of kitchen waste fertilizer, preparing of mixed soil, and preparing of back filling soil. According to the method, hydrogen peroxide is adopted in the composting process, desulfurized gypsum powder is added in the step of preparing of back filling soil. The using of hydrogen peroxide is capable of improving the oxygen supply conditions in aerobic composting process, improving the salt leaching effect of the desulfurized gypsum powder, increasing the germination index of improved soil in plant growth utilization, and improving the compost improved soil quality comprehensively.

Description

technical field [0001] The invention belongs to the field of solid waste recycling, in particular to a method for soil improvement by composting kitchen waste. Background technique [0002] The saline-alkali land and mineral soil that are not conducive to plant growth in my country are widely distributed, and they need to be effectively improved. Garbage composting products are a good soil conditioner. [0003] A large amount of organic domestic waste is produced in life, and kitchen waste, as the main component of organic domestic waste, produces a huge amount, and has high water content, is perishable, smelly, easy to biodegrade, and rots and deteriorates quickly. If it is not dealt with in time and effectively, it will cause serious harm to environmental sanitation and physical health. Therefore, the disposal of food waste is an environmental protection problem faced by the Chinese government, and it is also an environmental protection problem that the world needs to fa...

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Problems solved by technology

Chinese patent publication CN105503335A discloses a method for producing high-organic-carbon fertilizer from food waste, which combines anaerobic Based on the principle of digestion and aerobic composting, a high organic carbon fertilizer with good water solubility, high carbon content and comprehensive nutrients is prepared, but the process of this method is complicated and the requirements for composting equipment are relatively high

Chinese patent publication CN106278761A discloses a method of using excess sludge and wood waste to prepare organic fertilizers. Before composting and fermentation, the sludge is sterilized at 121° C. for 30 minutes in an autoclave, but this sterilization method is harmful to High equipment and temperature requirements, high operating costs

Chinese patent publication CN102826878A discloses a method for converting food waste into fertilizer: mixing livestock manure, crop stalks and food waste to obtain a mixture, and fermenting the obtained mixture to obtain fertilizer. The method uses pig manure and straw As the main material of compost, adding appropriate proportion of kitchen waste can solve the problem of poor ventilation of compost alone to a certain extent, but the improvement of compost ventilation by this mixing method is extremely limited.

Chinese patent announcement CN203653451U discloses a compost ventilation duct device, which has multiple groups of vents with inclined downward openings. By installing the device on the composting platform, it can evenly supply oxygen for aerobic composting and improve the efficiency of composting. Efficiency, but by using this device for oxygen supply, it not only needs to transform the composting platform but also has problems such as complex structure

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