The ultra-high-temperature multi-layer aerobic fermentation tank is a highly efficient, closed-loop biological treatment system specifically designed to render municipal sludge, food waste, livestock and poultry manure, and other organic solid wastes harmless, reduce their volume, and recover valuable resources. At its core, the system creates an optimal growth environment for aerobic microorganisms (such as bacteria, fungi, and actinomycetes) by means of forced ventilation and continuous mixing within a sealed container. These microorganisms break down organic matter while generating high temperatures, ultimately transforming pollutants into stable, non-hazardous humus-like products—commonly referred to as "nutrient-rich soil" or "bio-organic fertilizer."

I. Core Working Principle

1.  Aerobic fermentation: Under conditions where oxygen is present, microorganisms break down carbon, nitrogen, and other components in organic matter, converting them into carbon dioxide, water, minerals, and stable humus. This process releases significant amounts of heat.

2.  High-temperature inactivation: During fermentation, the system precisely controls the temperature to maintain the material at 55-70 °C or even higher, sustained for a certain period of time. This high-temperature phase effectively eliminates pathogens, insect eggs, and weed seeds in the sludge, achieving harmless treatment.

3.  Forced ventilation and agitation: The tank is equipped with an air distribution system at the bottom, powered by a blower that forcefully supplies oxygen. Simultaneously, a stirring device inside the tank periodically turns the material, ensuring even oxygen distribution, eliminating anaerobic dead zones, accelerating the fermentation process, and promoting moisture evaporation to reduce waste volume.

II. Main System Components

A typical high-temperature aerobic fermentation tank usually includes the following key components:

1.  Tank body: The main structural component, typically cylindrical and vertical, made from insulated stainless steel or corrosion-resistant carbon steel, serving to maintain temperature, ensure airtightness, and support loads.

2.  Feeding system: Includes material elevators, conveyor belts, and more, used to deliver pre-treated materials (which typically require adjustment of moisture content and C/N (Bi) is transported into the fermentation tank.

3.  Air distribution and aeration system: Located at the bottom of the tank, this system consists of aeration pipes and an air blower, responsible for evenly delivering oxygen into the tank—it’s the lifeline of the aerobic reaction process.

4.  Stirring system: Located inside the tank, it typically consists of a central spindle and multi-layered agitator arms, designed to break up and turn the materials, ensuring thorough mixing while preventing clumping.

5.  Monitoring and Control System: The "Brain" of the System. Includes temperature and oxygen concentration ( O 2) Humidity and other sensors, and PLC Automatic control cabinet. It can automatically adjust the ventilation volume and stirring frequency based on real-time data, optimizing fermentation conditions.

6.  Waste gas treatment system: The fermentation process generates odorous gases such as ammonia and hydrogen sulfide, along with small amounts of other compounds. VOCs After being collected centrally, the exhaust gases are purified through processes such as biofilters or chemical scrubbers, and then discharged only after meeting emission standards, thus preventing secondary pollution.

7.  Discharge System: After fermentation is complete, the discharge port located at the bottom of the tank opens, allowing the matured material to be conveyed to the aging or subsequent processing area.

III. Brief Overview of the Process Flow

1.  Feed: The pre-mixed materials are fed into the fermentation tank.

2.  High-temperature fermentation (main processing stage):

· Warming period ( 0-2 Heaven): Microorganisms multiply rapidly, and the temperature rises to 45-55 °C.

· High-temperature period ( 2-3 Tian): Thermophilic microorganisms become the dominant microbial community as the temperature rises to 60-70 Above ℃, achieving harmlessness.

· Cooling Phase (Late Stage): Organic matter has largely decomposed, and the temperature gradually decreases.

3.  Maturation / Chen Hua: The material discharged from the tank is not yet fully stabilized and needs to be piled up within the factory premises for a period of aging (typically 15-30 Heaven), allowing subsequent microorganisms to continue their action, ensuring complete maturation and enhancing product quality.

4.  Post-processing and Utilization: The aged product, after being screened, can have its coarse fraction reused as a conditioner, while the fine fraction serves as a high-quality bio-organic fertilizer or soil amendment, suitable for applications such as landscape gardening, land restoration, and agricultural field fertilization.

IV. Key Technical Features and Advantages

· Efficient and Harmless Disposal: High Temperature >55 ℃）Thoroughly eliminates pathogens, ensuring the treated product is safe and harmless.

· Significant volume reduction: The volume can be reduced through biodegradation and water evaporation. 30%-50% 。

· Resource utilization: Turning waste into valuable resources, producing high-quality organic fertilizers that align with the principles of a circular economy.

· Fully enclosed design: Environmentally friendly operation, effectively controlling odor and dust leakage, with an extremely low risk of secondary pollution.

· High degree of automation: PLC The system monitors and adjusts parameters such as temperature and oxygen in real time, ensuring stable operation with minimal need for manual intervention.

· Small footprint: With its vertical tank design, this system saves significant land compared to traditional windrow composting methods.

· Unaffected by weather: Operating in indoor tank systems allows for continuous, year-round operation, free from the constraints of harsh weather conditions such as rain, snow, or freezing temperatures.

5. Application Areas

· Municipal wastewater treatment plant: Processes dewatered municipal sludge.

· Food Waste Processing Center: Handles the digestate remaining after anaerobic digestion.

· Livestock farms: Managing livestock manure.

· Food processing plants, breweries: Handling organic waste residues.

6. Economic and Social Benefit Analysis

1.  Reduce pollution discharge fees: Achieve "zero emissions" of pollutants and avoid environmental fines.

2.  Save on fertilizer costs: Producing organic fertilizers in-house can replace part of the chemical fertilizers, allowing their use in nearby farmlands, orchards, and tea gardens, thereby reducing cultivation expenses.

3.  Generate sales revenue: Sell the deeply processed organic fertilizer product to external markets, creating a new avenue for profit growth.

4.  Obtaining policy subsidies: These types of environmental protection and resource utilization projects can typically apply for government-specific subsidies aimed at the resourceful use of livestock and poultry manure, as well as environmental governance initiatives.

Social and Environmental Benefits:

1.  Improve the hygiene conditions in and around the farm to reduce disease transmission.

2.  Promote the integration of crop and livestock farming, develop circular agriculture, improve soil structure, and enhance land fertility.

3.  Reduce regional environmental pressures and contribute to the management of agricultural non-point source pollution.

7. Implementation Recommendations and Precautions

1.  Preliminary Research: Accurately measure the daily volume of fecal waste and select appropriate equipment specifications (such as 100m ³、 120m ³Processing tank).

2.  Preprocessing is key: Ensuring a stable supply of the conditioner and uniform mixing is essential for efficient fermentation.

3.  Energy considerations: Wind turbines and mixing equipment are the primary energy-consuming units; variable-frequency devices can be selected to reduce operational power consumption.

4.  Future planning: Clearly map out the intended uses for the organic fertilizer produced—whether for self-use or sale. If selling is planned, consider steps such as further processing (e.g., granulation and packaging) and obtaining product certification, including an organic fertilizer registration certificate.

5.  Professional Operations and Maintenance: Although these are automated systems, they still require dedicated personnel for daily inspections and routine maintenance to ensure long-term, stable operation.

Summary:

Canned high-temperature aerobic fermentation technology is one of the most effective and environmentally friendly solutions for handling livestock and poultry manure in modern animal husbandry. It successfully transforms this troublesome pollution source into valuable resources, achieving a win-win situation that delivers both environmental and economic benefits. As such, it has become the preferred technological approach for driving green and sustainable development in the livestock industry.