1、 Composition of initial investment cost
Establish a small-scale straw gas power plant, with initial investment mainly including:
Equipment cost: Gasification furnace, purification system, gas generator set, waste heat recovery device, etc. are the core investments.
Civil engineering and installation costs: including factory construction, equipment foundation, pipeline laying, etc.
Grid access cost: If grid connected electricity sales are required, it involves transformer, protection device, and access procedure fees.
2、 Analysis of operating costs
Raw material cost: The cost of purchasing, transporting, and storing straw. In some areas, the cost of straw is extremely low, and even only transportation and packaging fees need to be paid.
Labor cost: requires personnel for operation, maintenance, and management.
Maintenance cost: Regular maintenance of equipment, replacement of vulnerable parts, etc.
3、 Main source of income (profit model)
Electricity sales revenue: This is the most core revenue. The generated electricity can be self consumed spontaneously, saving electricity costs; It can also be integrated into the power grid according to the national renewable energy pricing policy to obtain electricity sales revenue. Some regions provide electricity price subsidies for biomass power generation.
Waste heat utilization income: The waste heat generated by the generator set can be recovered and used for heating (such as greenhouses and residential areas), drying (such as grain and wood), or providing industrial hot water, forming “cogeneration”, greatly improving overall energy efficiency and economic benefits.
Sales revenue of charcoal fertilizer: Biomass charcoal (grass ash), a by-product generated during gasification, is a highly efficient organic fertilizer rich in potassium that can be packaged and sold to increase additional income.
Environmental subsidies and carbon trading: Projects may receive government subsidies or rewards for environmental projects. In addition, by reducing carbon emissions, the carbon reduction generated by the project can be traded in the carbon trading market and generate profits.
4、 Analysis of Investment Returns
Taking a small-scale project that consumes 1000 tons of straw annually as an example:
Investment amount: Approximately 1-2 million RMB.
Annual power generation: Approximately 500000 kWh of electricity can be generated. If self used, saving 0.8 yuan per kilowatt hour, the annual income is about 400000 yuan; If connected to the grid for electricity sales, the revenue may be higher based on the subsidized electricity price.
Waste heat and carbon fertilizer income: can generate an additional income of about 100000 to 200000 yuan per year.
Investment payback period: Taking into account all factors, the static investment payback period for such projects is usually between 3-6 years, depending on local raw material costs, electricity pricing policies, and operational management levels.
Conclusion:
The straw gas power generation project has clear multiple profit points. Although the initial investment is relatively high, its operating costs are relatively controllable and its revenue sources are diversified. Against the backdrop of increasingly strict national and local policy support and environmental requirements, investing in straw gas power generation is not only a socially responsible choice, but also a long-term investment with good economic prospects.
Post time: Oct-11-2025