🐄 Biogas Digester ROI Calculator

Calculate the return on investment for a biogas digester in Africa. Enter your livestock and cooking needs to see gas output, fuel savings, and payback period.

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Your Farm & Cooking Details

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Quote-backed payback inputs

Only count benefits you can support. Gas coverage caps LPG displacement. Bioslurry starts at zero, and the model cost remains visibly provisional until you enter an installer quote.

Include digester, stove, piping, labour, water connection, safety fittings, and commissioning.
A country planning default is loaded. Replace it with a current refill receipt or supplier quote.
Enter only recorded fertilizer spend avoided or realistic sales backed by a buyer. Otherwise leave zero.
Water, labour, desilting, repairs, stove or pipe service, and other recurring cost.
Evidence-adjusted net payback
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Input basis: —
Not calculated
MetricValue
Daily Biogas Output—
Cooking Gas Coverage—
LPG Avoided / Month—
Digester Size—
Digester Type—
Installed Cost Used—
Monthly LPG Saving—
Annual LPG Saving—
Verified Bioslurry Value / Month—
Annual Operating & Maintenance—
Fuel-Only Payback—
Net Payback (fuel + verified slurry − O&M)—
CO₂ Screening Estimate / Year—

Biogas Digesters in Africa — A Sustainable Energy Solution

Biogas digesters convert animal waste into cooking gas and a nutrient-bearing digestate. Household programs in African markets use manure-fed systems for cooking, but output and economics depend on collected feedstock, water, temperature, operation, installed cost, and the fuel actually displaced.

Method boundary: The protected livestock-yield model remains a planning screen. FAO and World Bank technical references show that gas production varies with feedstock and operating conditions, so this page caps fuel savings by modeled coverage and requires local evidence for financial benefits.

Biogas ROI check

Estimate gas output, then verify installer assumptions

Use livestock and cooking inputs to model coverage, then replace provisional cost and benefit values with current records before relying on payback.

Local estimate

Reviewed 14 July 2026. Farm conditions vary.

Check the assumptions

Limits

  • Protected planning factors are not a site test; feed, collection, temperature, design, leakage, and maintenance change yield.
  • The CO₂ row is a screening estimate, not a carbon-credit or emissions-inventory result.
  • This page does not replace installer sizing, gas-tightness checks, ventilation, fire safety, finance disclosures, or grant review.
  • No farm or household data is uploaded by AfroTools.

Planning estimate only. A checked box means the user reviewed their own records; it is not AfroTools verification or installer approval.