Method for preparing landscaping soil by using urban sludge

A technology of urban sludge and landscaping, applied in botany equipment and methods, horticulture, application, etc., can solve the problems of changing soil physical and chemical properties, high restoration efficiency of physical methods, affecting soil ecological balance, etc., to reduce the use of chemical fertilizers , shorten the composting cycle, and reduce the effect of heavy metal content

Active Publication Date: 2019-02-15
宁波高新区纯丽节能技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical method has high repair efficiency and high cost; although the chemical method is effective, it is expensive and may cause secondary pollution. Although the biological method is safe and low in cost, it takes a long time
At the same time, the sludge is accompanied by the generation of odor during the composting process, which will have an impact on the surrounding environment
As for the solution to the odor in the soil, it is more cumbersome to use special deodorization equipment for deodorization, which increases the process cost. If chemical reagents are added to the sludge for deodorization, the physical and chemical properties of the soil itself may be changed, affecting soil ecological balance

Method used

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  • Method for preparing landscaping soil by using urban sludge
  • Method for preparing landscaping soil by using urban sludge
  • Method for preparing landscaping soil by using urban sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of landscaping soil 1: (1) Add 8% by mass of hull, 0.3% of Bacillus licheniformis, and 10% of bacterium chaff to the treated sludge of the sewage plant and mix evenly to obtain a sludge mixture; (2) The sludge mixture obtained in step (1) is subjected to aeration fermentation for 5-7 days in an environment of 45°C-60°C; (3) the product in step (2) is mixed, every 2 days Turn once, control the moisture content at 50%-60%, and get a semi-finished product after 5-7 days; (4) Do not add other substances to the semi-finished product obtained in step (3), continue to stir, turn once every 2 days to control the moisture content Between 25% and 35%, 5-7 days later, it will be used as a blank control group, namely landscaping soil 1 (as a blank control).

Embodiment 2

[0046] Preparation of landscaping soil 2: (1) Add 8% by mass of hull, 0.3% of Bacillus licheniformis, and 10% of bacterial residue to the treated sludge of the sewage plant and mix evenly to obtain a sludge mixture; (2) The sludge mixture obtained in step (1) is subjected to aeration fermentation for 5-7 days in an environment of 45°C-60°C; (3) the product in step (2) is mixed, every 2 days Turn it once, control the moisture content at 50%-60%, and get a semi-finished product after 5-7 days; (4) Add 1.5% quartz sand, 1.5% clay, and 1% of the semi-finished product to the semi-finished product obtained in step (3). Coal gangue and 1.5% oyster shell powder mineral material and 1.5% starch, 3% fungus chaff, 5% biochar and 0.1% Bacillus licheniformis and Bacillus subtilis composite strain, and 0.03% is added at the same time The soil conditioner citric acid is stirred evenly, and then ventilated and fermented in an environment of 45°C-60°C for 5-7 days to control the soil moisture c...

Embodiment 3

[0048] Preparation of landscaping soil 3: (1) Add 8% by mass of husker, 0.3% of Bacillus licheniformis, and 10% of bacterium chaff to the treated sludge of the sewage plant and mix evenly to obtain a sludge mixture; (2) The sludge mixture obtained in step (1) is ventilated and fermented in an environment of 45-60°C for about 5-7 days; (3) the product in step (2) is mixed, every 2 days Turn once, control the moisture content between 50% and 60%, and get semi-finished products after 5-7 days; (4) Add 3% quartz sand, 3% clay, and 2% coal gangue to the semi-finished products obtained in step (3) And 3% oyster shell powder mineral material and add 0.08% starch, 7% bacterial residue, 8% biochar and 0.3% Bacillus licheniformis and Bacillus subtilis composite strain, and 0.08% soil The modifier citric acid, after stirring evenly, is ventilated and fermented in an environment of 45°C-60°C for 5-7 days to control the soil moisture content between 25% and 35% to obtain garden greening soi...

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Abstract

The invention discloses a method for preparing landscaping soil by using urban sludge. The method comprises the following steps of adding rice chaff, strains and mushroom bran into the urban sludge for uniform mixing to obtain a sludge mixed material first; placing the sludge mixed material in an environment of 45 to 60 DEG C for ventilation fermentation for 5-7 days to obtain a fermentation product; mixing the fermentation product, controlling the moisture content to be 50-60%, and obtaining a semi-finished product 5-7 days later; adding 5.5-11% of mineral materials, 1.5-3% of starch, 0.1-0.3% of the composite strains, 3-7% of the mushroom bran and 5-8% of biological charcoal and a soil improvement agent by mass into the semi-finished product for uniform stirring, then conducting fermentation in an environment of 45-60 DEG C for 5-7 days, and controlling the soil moisture content to be 25-35% to obtain the landscaping soil. The landscaping soil prepared by means of the method meets the nutritional demands of garden plants, and the content of heavy metal in the landscaping soil is reduced.

Description

Technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a method for preparing garden greening soil using urban sludge. Background technique [0002] The existing technology of making landscaping soil from urban sludge tends to increase the nutrients in the sludge. It usually uses the addition of green plant waste, bacterial residue, agricultural solid waste and animal manure to the sludge to improve the sludge. Nutrients to meet the growth needs of plants. However, there is currently a lack of landscaping soil preparation processes that use urban sludge as landscaping soil to meet plant growth requirements while effectively reducing heavy metals in the soil. [0003] For soil heavy metal remediation, it is usually divided into physical, chemical and biological methods. The physical method is more efficient at the same time as the cost; although the chemical method is effective, the cost is high, and there may b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G24/00A01G24/10A01G24/15A01G24/20A01G24/22A01G24/30
CPCA01G24/00A01G24/10A01G24/15A01G24/20A01G24/22A01G24/30
Inventor 包晓东王家德陆敏英李丽李非里
Owner 宁波高新区纯丽节能技术有限公司
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