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Method for controlling heavy-matal pollution by domestic waste compost particle sizing

A domestic garbage and garbage composting technology, which is applied in the field of agricultural and environmental sciences, can solve the problems of garbage composting with different particle sizes that have not been reported in the literature.

Inactive Publication Date: 2008-06-18
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although these studies provide a theoretical basis for improving the physical and chemical properties of waste compost through particle size sieving, previous studies on the physical and chemical properties of waste compost and the accumulation methods of organic matter, trace elements, and heavy metals are limited to unsorted raw waste. At the level of composting, the research on the composting of garbage with different particle sizes after sieving has not been reported in the literature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The waste compost taken from the Xiaodian domestic waste composting treatment plant in Tianjin is first manually picked up to remove all kinds of wood, plastic, glass, metal and other sundries in the waste compost. Garbage composting is sieved by standard sieves with different apertures, and is divided into 6 compost particle size grades of >1.6mm, 1.6-0.8mm, 0.8-0.4mm, 0.4-0.2mm, 0.2-0.1mm, and <0.1mm for treatment . Then do a comparative test:

[0052] (1) Get garbage compost > 1.6mm particle size 65%, powder slag (common soil) 35%, plant small tomato, add water is 45% of batching total amount, plant 30 days, measure the effect of heavy metal content on small tomato in the soil influences.

[0053] (2) Garbage compost CK (contrast) 65% and slag (common soil) 35% without sieving, plant small tomatoes, the amount of water added is 45% of the total amount of ingredients, plant for 30 days, measure the impact of heavy metal content on small tomatoes in the soil Impact....

Embodiment 2

[0058] The garbage compost taken from the domestic garbage composting treatment plant is first manually picked up to remove all kinds of wood, plastic, glass, metal and other sundries in the garbage compost. , 1.6 ~ 0.8mm, 0.8 ~ 0.4mm, 0.4 ~ 0.2mm, 0.2 ~ 0.1mm, <0.1mm 6 compost particle size grades as treatment. Then do a comparative test:

[0059] Through the soil culture experiment of the potted plant, the effect of applying compost with sub-sieve>1.6mm on bioavailability and effective state content in soil was studied. The results showed that the content of available microelements in the soil increased with the application of waste compost with size >1.6 mm.

[0060] (1) Garbage compost > 1.6mm particle size 70%, powder slag (common soil) 30%, plant red string, add water to 50% of the total ingredients, plant for 15 days, measure the influence of trace elements in the soil on red string , the resulting clusters are bright red and shiny, with a long flowering period and go...

Embodiment 3

[0065] The garbage compost taken from the domestic garbage composting treatment plant is first manually picked up to remove all kinds of wood, plastic, glass, metal and other sundries in the garbage compost. , 1.6 ~ 0.8mm, 0.8 ~ 0.4mm, 0.4 ~ 0.2mm, 0.2 ~ 0.1mm, <0.1mm 6 compost particle size grades as treatment. Then do a comparative test:

[0066] (1) Take 70% of 1.6-0.8mm particle size garbage compost, 30% of powder residue (ordinary soil), plant cactus, add water as 50% of the total amount of ingredients, plant for 30 days, and measure by cactus potted soil cultivation experiment The effect of trace elements in soil on cactus, and the effect of sub-sieving 1.6-0.8mm garbage compost on the appearance of cactus was studied. The results showed that the cactus leaves were dark green and shiny.

[0067] (2) Garbage compost CK (contrast) 70% and slag (ordinary soil) 30% without screening, plant cactus, add water for 50% of the total amount of ingredients, plant for 30 days, and...

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Abstract

The invention relates to a method for controlling heavy metal pollution and optimization and utilization of compost by adopting the compost grain size of screening household garbage. The invention is characterized in that: the household garbage is pretreated, and then the garbage compost is screened by adopting the standard screens of more than 1.6 mm, 1.6 to 0.8mm, 0.8 to 0.4mm, 0.4 to 0.2mm, 0.2 to 0.1mm or less than 0.1 mm, so that the garbage compost in different sizes can be collected; the organic matter, trace element and heavy metal content are measured, and which can be used in the soil in different production targets according to needs. The invention can reach the purposes on removing excessive heavy metal hazardous substance in the compost and reserving the compost grain for providing nutrients for the plant growth and improving the physicochemical property, and the invention also can provide scientific basis for using the household garbage safely, effectively and reasonably.

Description

technical field [0001] The invention belongs to the field of agricultural environment science and technology, and relates to a method for harmless and resourceful utilization of urban household garbage, and more specifically to a method for controlling heavy metal pollution and optimizing utilization by particle size sieving of household garbage composting. Background technique [0002] With the development of urban construction and the continuous expansion of urban population, the amount of domestic garbage is also increasing day by day. How to effectively deal with these polluting garbage has become a serious social problem that plagues urban development. At present, all countries in the world regard the reduction, harmlessness and recycling of municipal solid waste as the principle of comprehensively solving urban waste. The composting of municipal waste is in line with this direction. Composting not only solves the problem of pollution, reduces the pressure of waste on ...

Claims

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Application Information

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IPC IPC(8): C05F9/04C05G5/00
CPCY02A40/20
Inventor 多立安刘晓波赵树兰
Owner TIANJIN NORMAL UNIVERSITY
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