Start / Soil and fertilization / Manure, composting and biogas
How much biogas and energy your herd's manure can generate per day.
Pre-sizing and estimating tool: the results do not replace a design, calculation, or report signed by a qualified professional, nor verification against the applicable standards.
Daily biogas volume for the herd, keeping the other manure data unchanged.
Daily electricity for different generator set efficiencies.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
Biogas, methane and electricity for different specific yields per kg of VS, with the other data from your scenario.
The calculation done in steps, with the values you entered.
The calculation memo gathers this page's inputs, results, equations, assumptions, and references, with fields for project, responsible person, and review. The full report also includes the charts and interpretations, in color. In the print window, choose Save as PDF.
Enter the number of animals, the manure production per animal, the total solids and volatile solids content of the manure, and the specific biogas and methane production. Also enter the generator set efficiency. The calculator estimates the biogas and the energy it can generate per day.
100 animals producing 20 kg of manure per day, with 10% TS and 80% VS. Biogas yield of 0.20 m³ per kg of VS, 60% methane and a generator with 35% electrical efficiency.
Manure = 2,000 kg/day; TS = 200 kg; VS = 160 kg. Biogas = 160 × 0.20 = 32 m³/day; methane = 19.2 m³/day.
Thermal energy = 19.2 × 9.94 = 190.9 kWh/day. Electrical = 190.9 × 35% = 66.8 kWh/day, or about 24.4 MWh per year.
No. A real biodigester depends on temperature, retention time, and feed load. Use the result for sizing, not as a production guarantee.
As thermal fuel or for power generation. Recovery depends on the project and the equipment chosen.
Important notice: the Agrocalcs tools make estimates and preliminary sizing based on the data entered and on published engineering methods. They do not replace a design, a calculation report or a report signed by a qualified professional (CREA/ART), nor verification against the applicable technical standards and legislation, such as the Regulatory Standards of the Ministry of Labor. Material and fuel properties vary: check with the manufacturer or with analyses of your process before deciding. By using the site, you agree to the Terms of Use.
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