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Method for producing compost through fermentation of organic waste

A technology for organic waste and composting, applied in the field of waste recycling, can solve the problems of not easy survival, ammonia accumulation and volatilization loss, reduction of compost nitrogen content, etc. Effect

Inactive Publication Date: 2019-05-21
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, during the process of composting aerobic fermentation, the temperature will continue to rise, especially when it enters the high temperature stage above 55°C, the nitrifying bacteria that can convert ammonia into nitrate nitrogen in the residual sludge of sewage treatment are not easy to survive, which leads to The accumulation and volatilization of ammonia will reduce the nitrogen content of the obtained compost accordingly, which cannot meet the needs of plant growth, and the product quality and application effect are not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Specific steps are as follows:

[0055] First, mix the remaining sludge from sewage treatment in food factories and corn stalks with a particle size of 1mm in a mass ratio of 7:3, control the carbon-nitrogen ratio of the mixture to 25, and the water content to 55% to obtain fermentation raw materials, and then add phosphoric acid A mixture of dipotassium hydrogen phosphate and potassium dihydrogen phosphate (the mass ratio of dipotassium hydrogen phosphate and potassium dihydrogen phosphate in the mixture is 1:1.5) is added to the fermentation raw material in a proportion of 1% of the total mass of the fermentation raw material for aerobic fermentation, Obtain compost; among them, the aerobic fermentation is to stir the fermentation raw materials after adding buffer substances, primary fermentation and secondary fermentation in sequence, the stirring time is 20min, and the conditions of primary fermentation are temperature 35°C, ventilation rate 6m 3 / h, time 24h, the c...

Embodiment 2

[0058] Specific steps are as follows:

[0059] Firstly, the residual sludge from food factory sewage treatment and corn stalks with a particle size of 0.5mm are mixed according to the mass ratio of 7:3, the carbon-nitrogen ratio of the mixture is controlled to be 25, and the water content is 55%, to obtain fermentation raw materials, and then A mixture of dipotassium hydrogen phosphate and potassium dihydrogen phosphate (the mass ratio of dipotassium hydrogen phosphate and potassium dihydrogen phosphate in the mixture is 1:2) is added to the fermentation raw material in a proportion of 0.5% of the total mass of the fermentation raw material for aerobic fermentation , to obtain compost; among them, the aerobic fermentation is to stir the fermentation raw materials after adding buffer substances, primary fermentation and secondary fermentation in sequence. 3 / h, time 24h, the conditions for secondary fermentation are temperature 58°C, ventilation rate 6m 3 / h, time 48h.

[006...

Embodiment 3

[0062] Specific steps are as follows:

[0063] First, mix the remaining sludge from sewage treatment in food factories and corn stalks with a particle size of 2mm in a mass ratio of 7:3, control the carbon-nitrogen ratio of the mixture to 25, and the water content to 55% to obtain fermentation raw materials, and then add phosphoric acid The mixture of dipotassium hydrogen phosphate and potassium dihydrogen phosphate (the mass ratio of dipotassium hydrogen phosphate and potassium dihydrogen phosphate in the mixture is 2:1) is added into the fermentation raw material according to the ratio of 0.5% of the total mass of the fermentation raw material for aerobic fermentation, Obtain compost; among them, the aerobic fermentation is to stir the fermentation raw materials after adding buffer substances, primary fermentation and secondary fermentation in sequence, the stirring time is 20min, and the conditions of primary fermentation are temperature 35°C, ventilation rate 6m 3 / h, time...

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Abstract

The invention discloses a method for producing compost through fermentation of organic waste, and belongs to the technical field of waste resource utilization. By means of the method for producing thecompost through the fermentation of the organic waste, the ammonia loss in the process of producing the compost through the aerobic fermentation of the organic waste can be significantly reduced, andthe nitrogen retention effect is good; moreover, the method can well supplement the content of potassium and phosphorus in the obtained compost and improve the fertilizer efficiency; by means of themethod, aerobic fermentation is carried out for 32 h so that the ratio of ammonia nitrogen to nitrate nitrogen in the compost can be lowered to 1.52 and is reduced by 87.99% compared with that of compost obtained without using the method; the compost produced by means of the method is rich in potassium and phosphorus, the content of total nutrients can be up to 6.9% and is increased by 43.5% compared with that of the compost obtained without using the method.

Description

technical field [0001] The invention relates to a method for producing compost by fermenting organic waste, and belongs to the technical field of waste recycling. Background technique [0002] Sewage treatment surplus sludge is a by-product of sewage treatment, and its output increases rapidly with the improvement of sewage treatment capacity. A large amount of sewage treatment surplus sludge not only occupies a large amount of land, but also contains harmful components such as organic pollutants. It has become a public hazard affecting urban environmental sanitation. [0003] At present, the domestic treatment level of excess sludge from sewage treatment is still very low. Usually, the excess sludge from sewage treatment is discarded after conventional concentration and dehydration. This method is difficult to achieve the reduction, stabilization and harmlessness of sludge , Resource requirements, and, will bring secondary pollution to the environment. [0004] In order t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05F17/00
CPCY02W30/40
Inventor 李秀芬顾娟齐希光王新华任月萍
Owner JIANGNAN UNIV