With the development of animal husbandry and poultry breeding, the issue of rapid and effective treatment and utilization of animal feces has become prominent. For instance, chickens, due to their shorter intestines, have a limited amount of time for feed to remain in their digestive tract, absorbing only about 30% of the nutrients from the feed, with the majority excreted through the rectum. Generally, each kilogram of chicken manure contains 13.4 to 18.8 kilojoules of total energy in its dry matter, with a nitrogen content of 30 to 70 grams, and is rich in various trace elements, amino acids, proteins, etc. Chicken manure is a low-cost, low-protein feed and also an excellent agricultural fertilizer. Rapid processing and effective utilization of animal feces are both an urgent need to avoid environmental pollution and an effective way to enhance the economic benefits of animal husbandry enterprises. Traditionally, the treatment of animal feces has polluted the environment and caused significant nutrient loss. Currently, the animal feces treatment equipment developed by people cannot meet the actual needs due to the following issues: first, the equipment is functionally limited, such as being able to dry but not ferment; second, the processing efficiency is low and the effect is poor; third, the reliability of use is poor; fourth, the equipment is large in size, occupying a lot of space. The main reason for these problems is the lack of an optimized structural fermentation drum, a critical component.
In the animal husbandry industry, animal and poultry feces are often treated using traditional, simple methods such as manual stacking and fermentation, manual turning, or inexpensive sales, direct application to fields, or even discharged into rivers, causing severe environmental pollution. Due to the lack of scientific and effective treatment methods, the feces from farms are not being handled promptly and effectively, leading to environmental pollution, unpleasant air quality, and significant difficulties in treatment. However, with the increasing awareness of environmental protection, the urgency to address the issue of animal and poultry feces treatment is growing; the newly issued "Environmental Protection Plan," "Water Pollution Prevention and Control Action Plan," and "Regulations on Pollution from Large-scale Animal Husbandry" all propose technical upgrades for the treatment of animal and poultry feces. Therefore, there is an urgent need for a new method that can quickly and effectively handle animal and poultry feces.

Current污泥 disposal methods typically include landfilling, fertilizer production, power generation, and heat production. Landfilling involves deep burial of non-separable and non-usable materials, allowing nature to decompose them over a long period through physical and chemical processes; fertilizer production utilizes the organic matter in sludge to create agricultural fertilizers; during power and heat generation, the thermal decomposition and fermentation of sludge produce heat and gas. Fermenting sludge into organic fertilizer not only alleviates urban pollution and achieves waste recycling but also enriches soil fertility and improves the quality of agricultural products, offering multiple benefits. Sludge must undergo fermentation in a fermentation unit to become usable organic fertilizer.

Currently, sludge originates from the remaining sludge of wastewater treatment plants. The primary sludge treatment techniques include landfilling or incineration, which require large land areas and pose risks of secondary pollution. Incineration is energy-intensive, wasting organic matter and increasing carbon emissions. However, aerobic fermentation of sludge not only eliminates various pathogens but, by adding shredded leaves and straw, also achieves a balanced nutrient level, reaching the quality of fertilizer, thereby realizing waste recycling.

Waste resource recovery and reduction are hailed as the trend in today's environmental protection measures. Kitchen waste, due to its high pollution indicators, is considered the second-largest pollution source in cities after domestic wastewater. Achieving the resource recovery of kitchen waste can effectively reduce the amount of urban waste, improve the city's sanitation environment, and prevent the occurrence of diseases.
Kitchen waste, also known as slop, refers to food scraps and leftovers from restaurants, hotels, and other catering businesses, as well as from public canteens in homes, enterprises, institutions, and schools.
Kitchen waste has the following characteristics:
1. High organic matter content: Includes organic components such as starch, protein, meat, oil, etc.
2. High Moisture Content: As residual material from catering, the sludge has a high moisture content, approximately 70%.
3. High Oil and Salt Content: Due to China's dietary habits, compared to foreign food waste, China's food waste (including leftovers) not only has a high yield but also a higher content of oil and salt.
4. High hazard: prone to spoilage, rot, fermentation; breeding mosquitoes and flies; producing large quantities of and emitting foul odors; polluting water bodies and the atmosphere.
5. Strong resourcefulness: Compared to other waste, it has high moisture content, organic matter, salt, and oil content, as well as rich nutritional elements, making it highly valuable for recycling and utilization.
With the development of urbanization in our country, there is a continuous increase in landscaping, which leads to a growing volume of garden waste. Currently, most garden waste is mixed with municipal solid waste and sent to incineration plants or landfills for disposal. Garden waste has a low density, posing significant transportation capacity challenges for long-distance collection by the city. Additionally, it has issues like low calorific value for combustion and difficulty in decomposition when buried. Garden waste is a nutrient-rich organic material, and burning or burying it results in resource waste. High-temperature aerobic composting of gardens, utilizing the metabolic activities of aerobic microorganisms, quickly degrades cellulose and lignin, producing biological organic fertilizers, and achieves a good resource utilization effect.