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Method for preparing garden greening soil by using contaminated soil and kitchen waste

A technology for kitchen waste and polluted soil, which is applied in the field of waste resource utilization, can solve the problems of residual pollutants, few ways of dregs and soil absorption, etc., and achieves the effects of simple preparation method, improvement of a large amount of ablation, and improvement of economic value.

Active Publication Date: 2017-04-26
SHOUGANG ENVIRONMENTAL IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention provides a method for preparing garden landscaping soil by utilizing polluted soil and kitchen waste, which solves the technical problems of less residue absorption channels and residual pollutants after thermal desorption of polluted soil, and meets the index requirements of landscaping soil. At the same time realize the harmless and resourceful utilization of polluted soil and kitchen waste

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  • Method for preparing garden greening soil by using contaminated soil and kitchen waste

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Effect test

Embodiment 1

[0054] The food waste is screened to remove sundries, oil and water are separated, and the water content is reduced to 65% by centrifugation. Then add 3 / 10,000 microorganisms, and adjust the carbon-nitrogen ratio of the material to 20:1, then aerobic fermentation at 55°C for 12 hours to produce humic acid, so that the moisture content of the material is less than 15%, and sterilized and stabilized Aging, crushed into powder below 12 mesh.

[0055] In the raw material ratio (100%) to be used for landscaping soil preparation, the soil after thermal desorption (contaminated soil particle size is less than 10mm, thermal desorption at 600°C for 5 minutes) and the aerobic fermentation of kitchen waste Humic acid is used as the raw material, and the soil after thermal desorption in the ratio of raw materials (PH=8.0, total soil salt content: 78mg / kg, organic matter: 9.4g / kg, dry weight: 98%, hydrolyzed nitrogen: 57.4mg / kg, The addition amount of available phosphorus: 21.1mg / kg, avai...

Embodiment 2

[0057] The food waste is screened to remove sundries, oil and water are separated, and the water content is reduced to 60% by centrifugation. Then add 3 / 10,000 microorganisms, and adjust the carbon-nitrogen ratio of the material to 20:1, and then produce humic acid at 60°C for 10 hours with aerobic fermentation, so that the moisture content of the material is less than 13%, and it is sterilized and stabilized Aging, crushed into powder below 12 mesh.

[0058] In the raw material ratio (100%) to be used for landscaping soil preparation, the soil after thermal desorption (contaminated soil particle size is less than 10mm, thermal desorption at 350°C for 30 minutes) and the aerobic fermentation of kitchen waste Humic acid is used as the raw material, and the soil after thermal desorption in the ratio of raw materials (PH=7.9, soil total salt content: 83mg / kg, organic matter: 8.6g / kg, dry weight: 99.2%, hydrolyzed nitrogen: 53.2mg / kg, The addition amount of available phosphorus: ...

Embodiment 3

[0060] The food waste is screened to remove sundries, oil and water are separated, and the water content is reduced to 62% by centrifugation. Then add 3 / 10,000 microorganisms, and adjust the carbon-nitrogen ratio of the material to 20:1, then aerobic fermentation at 70°C for 8 hours to produce humic acid, so that the moisture content of the material is less than 14%, and sterilized and stabilized Aging, crushed into powder below 12 mesh.

[0061] In the raw material ratio (100%) to be used for landscaping soil preparation, the soil after thermal desorption (contaminated soil particle size is less than 10mm, thermal desorption at 200°C for 40 minutes) and the aerobic fermentation of kitchen waste Humic acid is used as raw material, and the soil after thermal desorption in the ratio of raw materials (PH=7.9, soil total salt content: 84mg / kg, organic matter: 7.9g / kg, dry weight: 99.8%, hydrolyzed nitrogen: 48.5mg / kg, The addition amount of available phosphorus: 19.1mg / kg, availa...

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Abstract

The invention discloses a method for preparing garden greening soil by using contaminated soil and kitchen wastes, and belongs to the technical field of waste recycling utilization. The method comprises: performing thermal desorption repairing treatment on contaminated soil; performing aerobic fermentation processing on kitchen wastes to prepare humic acid; uniformly mixing soil which is treated by thermal desorption and the humic acid generated by aerobic fermentation of the kitchen wastes, to obtain a mixture, wherein weight ratio of the soil which is treated by thermal desorption and weight ratio of the humic acid generated by aerobic fermentation of the kitchen wastes are respectively 70-95% and 5-30%; adding water to the mixture, mixing and stirring for 1-10 min, to prepare garden greening soil, wherein addition of water is lower than 25% of weight of the mixture. The humic acid generated by aerobic fermentation of the kitchen wastes and the soil which is treated by thermal desorption are used to compound and improve, and the humic acid and kitchen wastes are used in garden greening in a cycling manner, achieving related standard of garden greening soil. Compared with soil used for backfill and soil used for roads and other consumption approaches, economic value is improved.

Description

technical field [0001] The invention relates to the technical field of waste resource utilization, in particular to a method for preparing landscaping soil by using polluted soil and kitchen waste. Background technique [0002] In the context of my country's rapid economic development and accelerated urbanization, more and more industrial enterprises in large and medium-sized cities have implemented relocation and adjustment, leaving behind large areas of polluted sites. At the same time, cities continue to expand and the demand for construction land is increasing. This directly leads to the demand for remediation of urban post-industrial polluted sites. [0003] On September 9, 2014, the National Development and Reform Commission, the Ministry of Industry and Information Technology, the Ministry of Science and Technology, the Ministry of Finance and the Ministry of Environmental Protection issued the "Notice on the Implementation Plan for Major Environmental Protection Techn...

Claims

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Application Information

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IPC IPC(8): A01G9/10B09C1/06
CPCA01G24/00B09C1/06
Inventor 马刚平周宇刘长波梁勇李世青赵涛王友东邹翔
Owner SHOUGANG ENVIRONMENTAL IND
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