Farm livestock waste and domestic waste co-utilization and heavy-metal control process

A technology for domestic waste and heavy metals, applied in the field of ecological environmental protection, can solve the problems of high energy consumption, poor incineration economy, heavy metal pollution, etc. good effect

Inactive Publication Date: 2019-08-13
JIANGXI THERMAL POWER CONSTR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a process for synergistic utilization of agricultural and livestock waste and domestic waste and heavy metal control. The region faces the problem of multiple pollutants in agriculture, animal husbandry and urban domestic waste, and solves the problems of poor incineration economics when the single raw material of biomass or domestic waste is insufficient and high energy consumption for dry incineration of livestock and poultry manure. At the same time, another purpose It is also to achieve effective control of heavy metals in by-products, ensure discharge standards, and solve the problem of heavy metal pollution in livestock and poultry manure

Method used

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  • Farm livestock waste and domestic waste co-utilization and heavy-metal control process

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A process for synergistic utilization of agricultural and livestock waste and domestic waste and heavy metal control, such as figure 1 As shown, it consists of the following three parts: anaerobic fermentation section, composting section and boiler incineration section.

[0033] The concrete steps of described anaerobic fermentation workshop section are as follows:

[0034] Crush the corn stalks to 2.0mm. According to the TS content and element analysis results of pig manure and straw, mix corn stalks and fresh pig manure in proportion to adjust the C / N ratio to 27:1, add 20% inoculum, and add water as appropriate Adjust the water content to 90%, mix well and send it into the CSTR fermentation tank for 20 days of medium temperature and humidity anaerobic fermentation, and the fermentation will produce methane and residue.

[0035] The temperature of the mesophilic anaerobic fermentation is 33° C., and the pH is equal to 7.2.

[0036] The residue enters the filter pres...

Embodiment 2

[0046] A process for synergistic utilization of agricultural and livestock waste and domestic waste and heavy metal control, such as figure 1 As shown, it consists of the following three parts: anaerobic fermentation section, composting section and boiler incineration section.

[0047] The concrete steps of described anaerobic fermentation workshop section are as follows:

[0048] Crush the corn stalks to 2.5mm, mix the corn stalks and fresh cow manure in proportion to adjust the C / N ratio to 30:1 according to the TS content and elemental analysis results of cow dung and straw, add 20% inoculum, and add water as appropriate Adjust the water content to 92%, mix well and send it into the CSTR fermentation tank for 20 days of medium temperature and humidity anaerobic fermentation, and the fermentation will produce methane and residue.

[0049] The temperature of the mesophilic anaerobic fermentation is 35° C., and the pH is equal to 8.0.

[0050] The residue enters the filter p...

Embodiment 3

[0060] A process for synergistic utilization of agricultural and livestock waste and domestic waste and heavy metal control, such as figure 1 As shown, it consists of the following three parts: anaerobic fermentation section, composting section and boiler incineration section.

[0061] The concrete steps of described anaerobic fermentation workshop section are as follows:

[0062] Crush the wheat straw to 1.5mm, according to the TS content and elemental analysis results of the pig manure and straw, mix the wheat straw and fresh pig manure in proportion to adjust the C / N ratio to 25:1, add 20% inoculum, and add water as appropriate Adjust the water content to 88%, mix well and send it into the CSTR fermenter for 20 days of medium temperature and humidity anaerobic fermentation, and ferment to produce methane and residue.

[0063] The temperature of the mesophilic anaerobic fermentation is 35° C., and the pH is equal to 7.0.

[0064] The residue enters the filter press solid-l...

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Abstract

The invention discloses a farm livestock waste and domestic waste co-utilization and heavy-metal control process. Three parts are included, namely, the anaerobic fermentation station, the composting station and the boiler incineration station. According to the process, various by-products (biogas, a water-soluble fertilizer and a solid organic fertilizer) of an anaerobic fermentation process can be obtained; through the composting process, the efficiency of the organic fertilizer can be improved and the water content can be reduced with low energy consumption; through the incineration process,pollutant reduction is achieved, and heavy metals are gathered into fly ash, and the low-cost and safe treatment of the heavy metals is achieved. The technical problem is solved that the heavy metalsin anaerobic fermentation and composting products cannot be effectively controlled, meanwhile the defects can be made up for that the incineration cost is high and energy consumption for livestock excrement drying and incineration is high when single raw materials of biomass or domestic waste are insufficient, and the resource utilization, hazard-free treatment, reduction and economical treatmentof the waste are truly achieved.

Description

technical field [0001] The invention relates to the technical field of ecology and environmental protection, in particular to a process for synergistic utilization of agricultural and livestock waste and domestic waste and heavy metal control. Background technique [0002] At present, the pollution of animal husbandry, agricultural waste and domestic waste has become the focus of global attention. In terms of animal husbandry, according to statistics, in 2017, my country produced as many as 3.8 billion tons of livestock and poultry manure, but only about half of them were comprehensively utilized, which means that there are still nearly 2 billion tons of livestock and poultry manure that has not been properly treated. It has a huge negative impact on the ecological environment, human health, regional appearance, etc. In terms of agriculture, of the 820 million tons of crop straw produced nationwide each year, 215 million tons are burned and discarded. Not only wasting energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F15/00C05F17/00F23G7/00F23G7/06C12M1/107C02F11/04C04B28/00C02F103/20
CPCC02F11/04C02F2103/20C04B28/00C04B2111/00784C05F3/00C05F17/00C12M21/04F23G7/00F23G7/06C05F11/00C04B18/106Y02E20/12Y02E50/30Y02P20/10Y02W30/40
Inventor 吴昌垣肖伟超熊建英谢光辉汪志斌卢伟
Owner JIANGXI THERMAL POWER CONSTR CORP
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