As an energy source that has been widely used in many fields such as rural domestic gas supply, industrial power generation, and automobile fuel, biogas plays an important role in production and life. Do you know what biogas is?

Resource Attributes and Sustainability Advantages

1. Extensive and cheap raw materials: agricultural waste, industrial organic wastewater, urban domestic waste, etc. are used as raw materials, and most of them are reused without occupying additional resources;  

2. Strong renewability: Raw materials are recycled and renewable resources that can be supplied stably for a long time and are in line with the goal of "carbon neutrality";  

3. Turn waste into treasure and reduce pollution: Avoid environmental pollution caused by open dumping/landfill of waste and straw incineration, and reduce the risk of eutrophication in water bodies.

Environmental Protection and Carbon Emission Advantages

1. Low-carbon emissions: Combustion mainly produces CO₂ and water, forming a "carbon cycle", and the carbon emission intensity is much lower than that of fossil energy;  

2. Less pollutant emissions: no particulate matter, sulfides, nitrogen oxides and other pollutants are emitted, and are friendly to the atmospheric environment;  

3. Reduce the greenhouse effect: Replace fossil energy + avoid methane leakage, double reducing the impact of the greenhouse effect.

Energy Utilization and Practical Advantages

1. Moderate energy density, diverse uses: methane content is 55%-70%, energy density is close to natural gas, can be used for cooking, heating, power generation, automobile fuel, etc.;  

2. It can be storable, adjustable, and has strong stability: storage is realized through gas storage equipment to make up for the instability of solar energy and wind energy, and flexibly adapt to energy demand;  

3. Distributed supply, wide adaptation scenarios: it can be built and used nearby, reducing transportation costs and energy losses, and is suitable for remote areas and agricultural concentrated areas.

Added Value and Comprehensive Benefit Advantages

1. Produce high-quality organic fertilizers: Fermentation residue (biogas residue) and waste liquid (biogas slurry) are high-efficiency organic fertilizers, improve soil structure and reduce chemical fertilizer costs;  

2. Low economic costs, diversified benefits: free/cheap raw materials, low construction and operation costs, in addition to energy benefits, income can be increased through organic fertilizer sales and garbage disposal charges;  

3. Assist rural revitalization and ecological governance: improve rural living environment, solve pollution problems in breeding farms, and achieve triple benefits of economic, social and ecological.

Biogas production from food waste efficiently converts organic waste like agricultural straw, livestock manure, and kitchen waste into clean gas or bio-natural gas (BNG). It reduces pollution, replaces fossil fuels, cuts carbon emissions, and supports the "dual carbon" goals. In waste-intensive settings such as hotels, restaurants, and breeding parks, biogas generation from food waste technology solves waste issues while providing stable on-site energy, achieving both environmental and economic benefits.

Based on deep insight into the pain points of organic waste conversion, Wuxi Baomai Green Energy Technology Co., Ltd. systematically integrates co-digestion and fermentation with bio-natural gas refining technology to develop a modular biogas solution. This solution can be flexibly adapted to different scale scenarios such as urban and rural areas and parks. It not only significantly improves the efficiency and purity of gas production, but also transforms biogas from traditional energy supplement to a scalable and scalable green infrastructure.

Collection and Transportation System  

The collection and transportation system is an industrial-grade front-end logistics and primary treatment unit for kitchen waste (kitchen waste, waste grease). It realizes the transfer of materials from the production and waste end to the treatment plant area through special enclosed transportation equipment, and supports receiving ponds, hoppers, etc. Industrial facilities complete material classification and temporary storage and preliminary oil-water pre-separation, providing stable feeding conditions for the back-end treatment process.

Kitchen waste and waste grease are transported to the treatment plant in sealed special vehicles. Among them, waste grease is directly discharged into an open grease receiving tank, and kitchen waste is sent to a special receiving hopper through hydraulic equipment. In the receiving area, the principle of natural gravity sedimentation is used to complete preliminary oil-water separation first-the oil floating on it is temporarily stored in the oil floating collection area, and the remaining water and solid matter enter the next step, so that materials can be realized. Classification, temporary storage and preliminary mixing are evenly mixed.

Pretreatment System     

The pretreatment system is an industrial pretreatment section of kitchen waste, which includes a grease separation subsystem and a solid waste pretreatment subsystem: the former uses a physical separation process to extract waste grease at an industrial-level level to obtain qualified grease raw materials; the latter uses industrial equipment such as crushing separation and cyclonic sand removal to strip impurities and homogenize kitchen waste to produce organic slurry that meets the requirements of the anaerobic digestion process.

The initially separated oil will enter a continuous oil separation system, where the water and impurities inside will be removed through several steps of heating, sedimentation and filtration, and finally the industrial oil raw material will be obtained. These raw materials can be used to make biodiesel or supplied as chemical raw materials.

The kitchen waste in the receiving hopper is first broken by a special crusher, and at the same time, unusable impurities such as stones and metals are screened out. The broken material is temporarily stored in a buffer tank, and then pumped to the sand removal equipment to separate out heavy impurities such as sand. Finally, an organic slurry that can be used for fermentation is obtained to meet the feeding requirements of subsequent anaerobic digestion for food waste.

Anaerobic Digestion System 

The anaerobic digestion system is the core industrial reaction unit for the resource utilization of food waste. It uses hydrolysis tanks and anaerobic digestion tanks as the core process equipment. In a strictly controlled anaerobic environment, it uses microbial metabolism to degrade organic matter in organic pulp and simultaneously produces biogas (energy products) and biogas residue/biogas slurry (by-products), which are key industrial processes to realize the energy conversion and reduction of organic matter.

The pretreated organic slurry will be first adjusted to a temperature suitable for the reaction through a heat exchanger, and then continuously pumped into the anaerobic hydrolysis tank. In the tank, macromolecular organic matter is broken down into small molecule substances; then these materials enter the anaerobic digestion tank and are converted into biogas through the action of microorganisms in an oxygen-free environment, and at the same time produce a mixture of biogas residue and biogas slurry. This entire process exemplifies efficient anaerobic digestion of food wastes for biogas production.

Biogas Treatment and Utilization System 

The biogas treatment and utilization system is an industrial purification and energy conversion unit for biogas. It purifies and improves biogas through industrial equipment such as biological desulfurization and purification, and then uses industrial facilities such as generator sets, heating boilers, and CNG preparation devices to convert biogas into terminal energy products such as electricity, heat, and compressed natural gas; the supporting torch system realizes the safe incineration and disposal of surplus biogas.

The biogas produced from food waste first enters the biological desulfurization tower to remove the hydrogen sulfide inside, and then undergoes dehydration and decarbonization to obtain high-purity methane. Purified biogas has multiple uses: it can be converted into electrical energy through generators, it can also be used to generate industrial heat energy through waste heat boilers, and it can also be compressed into natural gas for external supply. If there is surplus biogas, it will be burned at high altitude through a fully automatic torch to ensure compliance with environmental emission regulations.

Biogas Residue/Biogas Slurry Treatment System 

The biogas treatment and utilization system is an industrial purification and energy conversion unit for biogas. It purifies and improves biogas through industrial equipment such as biological desulfurization and purification, and then uses industrial facilities such as generator sets, heating boilers, and CNG preparation devices to convert biogas into Terminal energy products such as electricity, heat, and compressed natural gas; the supporting torch system realizes the safe incineration and disposal of surplus biogas.

The biogas material produced by anaerobic digestion will enter the dehydration system and be separated into solid biogas residue and liquid biogas slurry. Solid biogas residue will be transformed into granular organic fertilizer after being dried, granulated, etc.; part of the liquid biogas slurry will be sent back to the pretreatment section for reuse, and the rest will be sent to a supporting sewage treatment plant for treatment to meet the standards. 

Why Choose Us

Our biogas treatment system converts food waste to biogas, raw materials and fertilizers through five systems, achieving a closed-loop process. It has the advantages of high recycling efficiency, significant reduction, diversified resource output, and controllable emissions. It has both environmental protection and economic benefits. It is an efficient solution for the recycling of urban organic waste, demonstrating a complete pathway for food waste to biogas.

If you are looking for efficient solutions for organic waste treatment and green energy transformation, click on the modular biogas treatment system of Wuxi Powermaxi Green Energy Technology Co., Ltd. to unlock a new path for win-win results in environmental protection and efficiency. Our expertise in biogas production from kitchen waste and biogas generation from food waste ensures a sustainable and profitable operation.