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Method for carrying out aerobic composting by utilizing pond sludge

An aerobic composting and pond mud technology, which is applied in the preparation of organic fertilizers, sewage/sludge fertilizers, and applications, can solve the problems of nutrient loss, long cycle, greenhouse gas emissions, etc., and achieves fast composting speed and thick farming The effect of layers, composting raw materials being readily available

Inactive Publication Date: 2021-03-02
SERICULTURE & AGRI FOOD RES INST GUANGDONG ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional aerobic composting technology has problems such as long cycle, serious nutrient loss, odor and greenhouse gas emissions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method of utilizing pond mud to carry out aerobic composting:

[0021] Composting raw materials are a mixture of pond mud, silkworm excrement and mushroom slag (using a ratio of 5:1:1), and 10% of a mixture of discarded leaves, discarded branches, and activated carbon, all placed in an initial moisture content of 42%. , Carry out natural fermentation at room temperature, first ferment to a high temperature above 50°C and maintain the temperature, turn over the compost on the 5th day after the initial fermentation, add water to 40%, continue to raise the temperature for secondary fermentation, and complete composting in 25 days For decomposing, the compost samples were taken to measure the germination index, which reached 83%, indicating that the pond mud had been completely decomposed.

Embodiment 2

[0023] A method of utilizing pond mud to carry out aerobic composting:

[0024] The composting raw material is a mixture of pond mud, silkworm excrement and mushroom slag (the ratio of use is 6:2:2), and 12% of the mixture of discarded leaves, straw, and distiller's grains can also be added. Carry out natural fermentation at room temperature, first ferment to a high temperature of 53°C and maintain the temperature, turn over the compost on the 5th day after the initial fermentation, add water to 45%, continue to raise the temperature for the second fermentation, and the compost will be fully decomposed in 26 days. The germination index was measured by taking compost samples, and it reached 84.3%, which indicated that the pond mud had been fully decomposed.

Embodiment 3

[0026] A method of utilizing pond mud to carry out aerobic composting:

[0027] Composting raw materials are a mixture of pond mud, silkworm excrement and mushroom slag (using a ratio of 6:3:1), and 15% of discarded leaves, discarded branches, activated carbon, straw, chaff, waste gas fertilizer, distiller's grains, wood chips can also be added , all placed in an environment with an initial moisture content of 45% and room temperature for natural fermentation. The first fermentation was carried out to a high temperature of 55°C and the temperature was maintained. Fermentation, the compost decomposing can be completed in 28 days, and the compost samples are taken to measure the germination index, which can reach 83.5%, indicating that the relatively complete decomposing of pond mud has been realized.

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Abstract

The invention belongs to the technical field of composting treatment, and particularly relates to a method for aerobic composting by using pond sludge. The method comprises the following steps: putting a mixture containing pond sludge, silkworm excrement and mushroom residues as a composting raw material in an environment with initial water content of 40-55% and room temperature for natural fermentation, carrying out primary fermentation to a high temperature of 50-65 DEG C, maintaining the temperature, carrying out irregular turning, supplementing water to 40-55%, continuously conducting heating for secondary fermentation, completing compost maturity within 25-30 days, taking a compost sample, and determining the germination index which can exceed 80% which indicats that the pond sludge is thoroughly matured by the method. Silkworm excrement rich in microorganisms and mushroom residues rich in organic matter are added to serve as a conditioner, aerobic composting decomposition of thepond sludge is achieved, and fertilizer application of the pond sludge is achieved. By adopting the pond sludge, various nutrients can be supplied to crops, a plough layer can be thickened, the physical properties of soil can be improved, and the fertilizer retention capacity of the soil can be improved.

Description

technical field [0001] The invention belongs to the technical field of composting, and in particular relates to a method for aerobic composting using pond mud. Background technique [0002] Composting generally refers to composting treatment, which refers to the biochemical process of using microorganisms that exist widely in nature to promote the conversion of degradable organic matter in solid waste into stable humus in a controlled manner. Composting is a process of producing organic fertilizer. It contains rich nutrients and has a long and stable fertilizer effect. The mixed use of chemical fertilizers can make up for the single nutrient contained in chemical fertilizers, and the long-term single use of chemical fertilizers will cause soil compaction, water retention, and fertilizer retention. [0003] In the prior art, various organic wastes are mainly used as raw materials for composting, including some agricultural wastes such as vegetable leaves and straws, and othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/80C05F17/00C05F17/40
CPCC05F3/00C05F17/00C05F17/40C05G3/80C05F5/00C05F7/00C05F11/00C05F11/08C05F5/008C05F5/002Y02W30/40
Inventor 杨琼李庆荣邢东旭肖阳陈莲邝哲师周东来
Owner SERICULTURE & AGRI FOOD RES INST GUANGDONG ACAD OF AGRI SCI
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