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Semi-forced ventilation static sludge aerobic compost method

A technology of aerobic composting and forced ventilation, applied in the direction of sewage/sludge fertilizer, organic fertilizer, fertilization device, etc., can solve the problems of low utilization rate of pipeline system, difficulty in realizing precise control, poor quality of composting products, etc., and achieve reduction Construction investment, small environmental impact, and the effect of reducing nitrogen loss

Active Publication Date: 2008-10-22
THUNIP HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing forced ventilation aerobic composting system is relatively complicated, and the ventilation pipes are easy to be blocked. When the sludge has poor air permeability, there will be channel flow, which will cause a short circuit and affect the fermentation effect. Not high; the natural ventilation system is simple, but it is difficult to achieve precise control, frequent turning operations, poor working environment, and poor quality of compost products

Method used

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  • Semi-forced ventilation static sludge aerobic compost method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] (1) Crushing waste wood to less than 100 mm;

[0026] (2) mix with the sludge of moisture content 80% according to the ratio of sludge: sawdust=1: 1 (weight ratio), and stir;

[0027] (3) Use a forklift to stack the mixture on the platform into a pile of trapezoidal sections with a height of 2.5 meters and a width of 6 meters. 10 pieces form a group, and a gap of 1.0 meters is left between the piles. The device processes two ventilation holes with a diameter of 600 mm and a spacing of 2.5 meters. A 1.2-meter-high retaining wall is set at one end of the stack, and a ventilation pipe interface is set on the wall corresponding to the ventilation hole. The ventilation pipe is connected to the fan. The other end of the fan leads to the waste gas treatment pool;

[0028] (4) Forced ventilation: After the stockpile is finished, cover the surface with a film, and monitor the temperature of the stockpile with a thermometer. When the temperature of the stockpile reaches 68°C, st...

Embodiment 2

[0031] (1) Crush the wood to less than 100 mm, crush the corn stalks to less than 80 mm, corn stalks: waste wood = 0.1:1;

[0032] (2) mix with the sludge with a moisture content of 80% according to the ratio of sludge: conditioning material=1:1 (weight ratio), and stir evenly;

[0033] (3) Use a forklift to stack the mixture on the platform into a pile of trapezoidal sections with a height of 2.0 meters and a width of 5.5 meters. 10 pieces form a group, and a gap of 0.5 meters is left between the piles. The device processes two ventilation holes with a diameter of 600 mm and a spacing of 2.5 meters. A 1.2-meter-high retaining wall is set at one end of the bar stack, and a ventilation pipe interface is set on the wall corresponding to the ventilation hole, and the ventilation pipe is connected to the fan. , the other end of the fan is connected to the exhaust gas treatment pool;

[0034] (4) Forced ventilation: After the stockpile is finished, cover the surface with a film, a...

Embodiment 3

[0037] (1) Shred wood to less than 100 mm, and shred agricultural waste such as straw and mushroom compost to less than 50 mm, agricultural waste: waste wood = 1:1;

[0038] (2) mix with the sludge with a moisture content of 75% according to the ratio of sludge: conditioning material = 1: 0.8 (weight ratio), and stir evenly;

[0039] (3) Use a forklift to stack the mixture on the platform into a pile of trapezoidal sections with a height of 1.8 meters and a width of 5 meters. 10 pieces form a group, and a gap of 0.5 meters is left between the piles. The device processes 3 ventilation holes with a diameter of 500 mm and a spacing of 1.3 meters. A 1.2-meter-high retaining wall is set at one end of the pile, and a ventilation pipe interface is set on the wall corresponding to the ventilation hole. The ventilation pipe is connected to the fan. The other end of the fan leads to the waste gas treatment pool;

[0040](4) Forced ventilation: After the stockpile is finished, cover the...

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Abstract

The invention relates to a semi-forced ventilation static aerobic sludge composting method belonging to the technical field of environmental protection. Precast conditioning materials are prepared, and the sludge and the conditioning materials are mixed according to proportion to form mixture. The mixture is piled up to form a strip heap with a trapezoid cross section and the lower part of the strip heap is provided with an air tunnel. One end of the heap is provided with a stop wall and the surface of the heap is covered by a thin film. When temperature rises, a fan is started to change fresh air and lower the temperature of the fermentation heap, and then the compost is sieved out after natural fermentation. The method has the advantages of low energy consumption, simple operation, good composting quality, low operation cost and little influence on environment. The prepared composting is easily absorbed by crops and can be directly used for landscaping, soil remediation and agri-fruit planting, etc.

Description

technical field [0001] The invention relates to a semi-forced ventilation static sludge aerobic composting method, which belongs to the technical field of environmental protection. Background technique [0002] Aerobic composting is one of the important means of sludge treatment. Sludge aerobic composting is to mix sludge with water content ≤ 80% with more than double the volume of dry sludge (water content ≤ 20%), bacteria, additives (fly ash, straw, etc.), so that the water content of the mixture is close to 55% (because the optimal moisture content of high-temperature aerobic composting is 55% to 60%), the mixed material is piled up into long strips or sent into a container, and forced ventilation or mechanical stirring is used to fully aerobically ferment the material. If the container is used for fermentation, special equipment must be used to stir and push the material forward at a constant speed, so that the material can be fermented evenly. Aerobic fermentation is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/00C05F7/00
CPCY02A40/20Y02W30/40
Inventor 王英彪袁琳张彬
Owner THUNIP HLDG
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