A carbon-nitrogen ratio optimization-based garden waste aerobic composting fermentation method

Abstract

The present application relates to a kind of based on carbon-nitrogen ratio optimization garden waste aerobic compost fermentation method, belong to organic solid waste resource processing technical field.The method is by adjusting the carbon-nitrogen ratio of garden waste to 25:1 to 30:1, control moisture content is 50% to 60%, and add 5% EM fungicide, using aerobic microorganism to carry out fermentation treatment.In fermentation process, by regular stirring and monitoring temperature, humidity, pH value and EC value, ensure the stability and high efficiency of composting process.After 15 days of fermentation, the temperature of pile drops to ambient temperature, and the compost product reaches complete composting, with a seed germination index greater than 85%.High-quality organic substrate is obtained.The present application has the advantages of simple operation, high resource utilization, environmental protection and pollution-free, and is suitable for resource processing of urban garden waste.

Description

Technical Field

[0001] This invention relates to the field of organic solid waste resource utilization technology, specifically to an aerobic composting fermentation method for garden waste based on carbon-nitrogen ratio optimization. Background Technology

[0002] With the acceleration of urbanization, the amount of garden waste generated is increasing year by year. Traditional treatment methods such as landfill and incineration not only occupy a large amount of land resources but also generate secondary pollution, which does not meet the requirements of sustainable development. Garden waste is rich in lignin and cellulose, and its treatment alone is not very effective. Therefore, how to achieve the resource-based treatment of garden waste through reasonable proportions and process parameters has become the core issue of this invention.

[0003] Aerobic composting is a common method for treating organic solid waste. Through the action of aerobic microorganisms, organic matter is converted into stable humus, achieving the reduction, harmlessness, and resource recovery of organic solid waste. However, parameters such as the carbon-to-nitrogen ratio and moisture content of garden waste vary considerably, making composting alone ineffective. Therefore, how to optimize parameters such as the carbon-to-nitrogen ratio to achieve efficient composting of garden waste is the core issue of this invention. Summary of the Invention

[0004] The purpose of this invention is to provide an aerobic composting fermentation method for garden waste based on carbon-nitrogen ratio optimization. By adjusting parameters such as carbon-nitrogen ratio and moisture content, aerobic microorganisms are used for fermentation treatment to finally obtain a well-rotted organic substrate.

[0005] The technical solution of the present invention is as follows: Raw material preparation: Crush garden waste to a particle size of less than 10 mm, adjust the carbon-nitrogen ratio to 25:1 to 30:1, and the moisture content to 50% to 60%.

[0006] Fermentation process: Add 5% EM inoculant, stir well, and then put it into an aerobic composting device. Control the temperature inside the fermentation chamber to 45℃ to 65℃, stir for 45 minutes every day, and regularly monitor the temperature, humidity, pH value, and EC value of the compost pile.

[0007] Fermentation products: After 15 days of fermentation, the temperature of the compost pile drops to the ambient temperature, the compost products are fully decomposed, the seed germination index is greater than 85%, and an organic matrix is ​​obtained.

[0008] Fermentation Equipment: This invention also provides fermentation equipment suitable for this method, including a feeding device, a fermentation chamber, a stirring device, and a control system. The fermentation chamber is equipped with a ventilation device and a heating device to ensure the stability and efficiency of the fermentation process.

[0009] Compared with existing technologies, the beneficial effects of this invention are: ① High resource utilization rate: By optimizing the carbon-nitrogen ratio and moisture content, efficient resource utilization of garden waste is achieved, reducing environmental problems caused by landfill and incineration. ② Simple operation: The aerobic composting equipment provided by this invention integrates crushing, mixing, composting, and turning, making it easy to operate and suitable for large-scale production. ③ Environmentally friendly and pollution-free: Gas and liquid pollutants generated during fermentation are effectively controlled, and the final product is a harmless organic matrix that can be used for greening. ④ Significant economic benefits: Through resource-based treatment, the treatment cost of organic solid waste is reduced, while the produced organic matrix has high economic value. Detailed Implementation

[0010] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example

[0011] 1. Raw material preparation: Collect garden waste (fallen leaves, branches, grass clippings, etc.), crush it to a particle size of less than 10 mm, adjust the carbon-nitrogen ratio to 25:1, and the moisture content to 55%.

[0012] 2. Fermentation process: Add 5% EM inoculant, stir well, and then place it in an aerobic composting device. Control the temperature inside the fermentation chamber at 45℃, stir for 45 minutes daily, and regularly monitor the temperature, humidity, pH, and EC values ​​of the compost pile.

[0013] 3. Fermentation products: After 15 days of fermentation, the temperature of the compost pile drops to the ambient temperature, the compost products are fully decomposed, the seed germination index is 150%, and an organic substrate is obtained.

[0014] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for aerobic composting and fermentation of garden waste based on carbon-nitrogen ratio optimization, characterized in that, Includes the following steps: Garden waste is crushed to a particle size of less than 10 mm, the carbon-nitrogen ratio is adjusted to 25:1 to 30:1, and the moisture content is 50% to 60%. Add 5% EM bacteria agent, stir well, and then put it into the aerobic composting equipment; The temperature inside the fermentation chamber is controlled between 45°C and 65°C. The mixture is stirred for 45 minutes daily, and the temperature, humidity, pH, and EC values ​​of the fermentation pile are monitored regularly. After 15 days of fermentation, the temperature of the compost pile drops to the ambient temperature, the compost products are fully decomposed, the seed germination index is greater than 85%, and an organic matrix is ​​obtained.

2. The method according to claim 1, characterized in that, The garden waste includes fallen leaves, branches, grass clippings, etc.

3. The method according to claim 1, characterized in that, The carbon-nitrogen ratio is adjusted by adding urea or organic fertilizer.

4. The method according to claim 1, characterized in that, During the fermentation process, the temperature of the pile rapidly rises to above 45°C in the early stage of fermentation, and is maintained at a high temperature for 3 to 5 days, after which the temperature gradually decreases to the ambient temperature.

5. The method according to claim 1, characterized in that, During the fermentation process, the pH value of the pile is maintained between 6.5 and 8.5, and the EC value is less than 4000 μS / cm.

6. An aerobic composting device for garden waste suitable for the method described in claim 1, characterized in that, include: The feeding device is used to crush garden waste and adjust the carbon-nitrogen ratio and moisture content; Fermentation chamber is used to contain mixtures and carry out aerobic fermentation. The fermentation chamber is equipped with a stirring device and temperature, humidity and pH monitoring devices. A mixing device is used to periodically mix the pile to ensure uniform oxygen distribution. The control system is used to automatically adjust the temperature, humidity, and stirring frequency within the fermentation chamber.

7. The device according to claim 6, characterized in that, The fermentation chamber is equipped with a ventilation system to provide sufficient oxygen and promote the growth and metabolism of aerobic microorganisms.

8. The device according to claim 6, characterized in that, The fermentation chamber is equipped with a heating device to rapidly raise the temperature of the pile to above 45°C in the early stages of fermentation.

9. The device according to claim 6, characterized in that, The equipment also includes a discharge device for discharging the organic substrate after fermentation and for subsequent processing.