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Thermal hydrolysis and high-temperature aerobic composting treatment process of organic solid wastes

An organic solid, aerobic composting technology, which is applied in the treatment of biological organic parts, the preparation of organic fertilizers and organic fertilizers, etc., to achieve the effects of reducing operating costs, improving dehydration performance, and improving processing capacity.

Active Publication Date: 2014-12-03
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, traditional sludge composting needs to add a large amount of conditioner to adjust the moisture content, and the cost of conditioner accounts for a large part of the cost of sludge composting; on the other hand, the general composting takes 20 to 25 days

Method used

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  • Thermal hydrolysis and high-temperature aerobic composting treatment process of organic solid wastes

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Experimental program
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Effect test

Embodiment 1

[0028] The dewatered sludge with a water content of 80% in urban sewage treatment plants is diluted to a water content of 90% (solid content is 10%), and the diluted sludge is sent to the heat exchanger, and the hot sludge from thermal hydrolysis Carry out heat exchange for preheating treatment. After the sludge is preheated, the temperature is 95°C; then it is intermittently and quantitatively transported to the thermal hydrolysis tank. Thermal hydrolysis treatment with 1.0Mpa steam for 15 minutes; the solid content of the sludge after thermal hydrolysis treatment is 8%, and the heat exchange treatment with the original sludge is carried out through a heat exchanger to reduce the temperature of the sludge to 85°C Temporarily stored in the intermediate pool, and then intermittently and quantitatively sent to the plate and frame filter press for dehydration treatment. After dehydration, the moisture content of the filter cake is 50%. The biogas boiler produces steam, and the ef...

Embodiment 2

[0030] The organic waste has a moisture content of 80% and is diluted to a water content of 88% (that is, a solid content of 12%), and the diluted organic waste is transported to a heat exchanger for heat exchange with the hot organic waste from thermal hydrolysis for pretreatment. Heating treatment, the temperature of the organic waste is 88°C after preheating; then it is intermittently and quantitatively transported to the thermal hydrolysis tank, and the organic waste in the thermal hydrolysis tank is fed with steam at a temperature of 170°C and a pressure of 0.7Mpa at multiple points Thermal hydrolysis treatment was carried out for 52 minutes; the solid content of organic waste after thermal hydrolysis treatment was 11%, and the heat exchange treatment with the original organic waste was carried out through a heat exchanger, so that the temperature of the organic waste dropped to 77°C and then temporarily stored in the intermediate pool , and then intermittently and quantit...

Embodiment 3

[0032] The poultry manure with a water content of 80% in the farm is diluted to a water content of 85% (solid content is 15%), and the diluted poultry manure is transported to the heat exchanger, and the hot poultry manure from thermal hydrolysis Carry out heat exchange for preheating treatment. After preheating, the temperature of poultry manure is 80°C; then it is intermittently and quantitatively transported to the thermal hydrolysis tank, and the multi-point feeding temperature of the poultry manure in the thermal hydrolysis tank is 150°C , steam with a pressure of 0.4Mpa for 90 minutes of thermal hydrolysis treatment; the solid content of poultry manure after thermal hydrolysis treatment is 13%, and the heat exchange treatment is carried out with the diluted poultry manure through a heat exchanger, and the poultry manure temperature After dropping to 70°C, it is temporarily stored in the intermediate pool, and then intermittently and quantitatively sent to the plate and fr...

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Abstract

The invention discloses a thermal hydrolysis and high-temperature aerobic composting treatment process of organic solid wastes. The process comprises the following steps: preheating the organic solid wastes with the solid content of 10%-15% by virtue of a heat exchanger, performing thermal hydrolysis on hot steam with pressure of 0.4-1.0MPa and temperature of 150-190 DEG C, dehydrating the treated materials in a plate-and-frame filter press to form filter cakes with the water content of 35%-50%, adding proper conditioners and back-mixing materials into the filter cakes, and finally performing high-temperature aerobic composting treatment in a composting system to form organic nutritional soil. Compared with a conventional composting system, the process has the characteristics that the conditioner consumption is greatly reduced, the composting speed is relatively high, the composting effect is relatively good, and the treating capacity of the composting system is increased by 2-3 times.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a thermal hydrolysis high-temperature aerobic composting process for organic solid waste. Background technique [0002] In recent years, with the rapid development of my country's economy and the continuous strengthening of the country's environmental pollution control, the efficiency of my country's sewage treatment has been gradually improved. At the same time, a large amount of surplus sludge is generated in the process of sewage treatment to be treated. The residual sludge of urban sewage treatment plants is rich in organic matter, nitrogen, phosphorus and other nutrients, and has considerable fertilizer effects. [0003] Aerobic composting of excess sludge is one of the most common ways in sludge treatment. Aerobic composting is a process in which organic matter is continuously decomposed and transformed by the action of aerobic microorganisms (mainly aerobic ...

Claims

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Application Information

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IPC IPC(8): C05F17/02C05F7/00
CPCY02A40/20Y02E50/30Y02W30/40
Inventor 周永信宋海农张健黄海师潘振廖长功韦文慧陈永利
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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