Two livestock waste streams. One circular farm system.
Gataka 12 m³ poultry and pig-waste system
Poultry and pig waste converge into one digestion process serving the farm kitchen, the brooder and slurry recovery.
- Capacity
- 12 m³
- Technology
- fixed dome
- Location
- Gataka, Kiambu
- Completed
- 2023
- Sector
- farm
- Feedstock
- Poultry waste, Pig manure
- Applications
- Cooking, Brooding, Water pumping, Bio-slurry recovery
- Technical review
- approved
Client challenge
Two separate waste streams created odour and disposal costs, while brooding relied on purchased fuel.
Site conditions
Farm yard with sufficient area between the piggery and the poultry units, requiring careful drainage design.
Feedstock assessment
Poultry litter is energy rich but high in nitrogen, so it is co-digested with pig manure to keep digestion stable.
Energy demand
Cooking for the farm household, chick brooding heat and occasional water pumping.
Engineering response
A 12 m³ fixed-dome plant with a combined mixing tank and controlled loading to avoid ammonia inhibition.
Construction sequence
Excavation, dome construction, dual inlet arrangement, plastering and gas testing.
Gas handling
Condensate trap and filtration ahead of the brooder line, with isolation valves at each branch.
Appliance connections
Farm cooker, poultry brooder and a converted pump engine.
Slurry or effluent management
Slurry is stored and applied to farm plots, reducing fertiliser purchases.
Commissioning
Charged, leak tested and handed over with feeding and safety training.
Documented outcomes
Both waste streams now handled on site
Evidence: Company site observation
Brooding heat supplied by biogas
Evidence: Client-reported
Outcomes are labelled by evidence type: measured, company estimate, client-reported or unverified historical claim. Unverified claims are never published as fact.