Biodigester Installation
Kenya — Priced Fairly.
Installed Right.
Two systems. Six sizes. NEMA-compliant 3-chamber treatment, installed by HSE-trained professionals with a 5-year workmanship guarantee. Get your free site assessment and a quote within 24 hours.
Replace your septic tank with a sealed, NEMA-compliant biodigester — professionally installed across 50+ Kenyan towns. Choose between the reinforced concrete biodigester (permanent, 30–50 year lifespan) or the Bio Tank (factory-made plastic, installed in 1–3 days). Both carry a 5-year workmanship guarantee. Get a fully itemised quote within one working day — no obligation.
Concrete Biodigester Systems
Permanently built in-ground by Omidrop Africa's HSE-certified teams. Engineered for your specific soil type and water table. Three standard sizes — or custom beyond 3.0m³ on site assessment.
Why Choose Concrete?
The permanent choice — built in-ground by our professional teams, engineered for expansive clays, high water tables, and rocky ground. Lasts 30–50 years with minimal maintenance.
Compact Home
Permanent reinforced concrete biodigester for small households. Suited to all soil types — including expansive clays. Replaces your old septic tank for good.
- Full excavation & reinforced construction
- 3-chamber biological treatment
- Bacterial inoculation at commissioning
- NEMA compliance documentation
- 5-year workmanship guarantee
Mid-Size Family
Kenya's most popular concrete biodigester — serving growing families and small commercial premises. Custom-built for your exact soil conditions.
- Full excavation & concrete construction
- 3-chamber biological treatment
- Soakaway outlet & piping included
- Bacterial inoculation on commissioning
- 5-year workmanship guarantee
Large / Commercial
High-capacity concrete biodigester for schools, hotels, guesthouses, and multi-unit developments. Full NEMA commercial suite and dedicated project manager.
- Schools, offices, guesthouses, multi-unit
- 3-chamber high-volume treatment
- Soakaway field sized to site
- Full NEMA compliance suite (KESSHA-ready)
- Dedicated project manager
Apartment / Institution
Larger than 3.0m³? We design and install custom concrete biodigesters for apartment blocks, industrial sites, and high-load institutions. No standard size limit.
- Custom volume sized to your user load
- Full engineering design & drawing
- On-site construction by HSE team
- NEMA & KESSHA documentation
- Dedicated project manager
Bio Tank (Plastic) Systems
Factory-prefabricated and ready to install in 1–3 days. Any qualified plumber can fit a Bio Tank — the fastest way to go septic-free with the same proven 3-chamber treatment.
Why Choose Bio Tank?
Kenya's most popular ready-made biodigester — arrives pre-built, lowers in, connects, and commissions in days. No specialist team required. Relocatable if you move.
Compact Home
Kenya's most affordable complete biodigester — factory-made and installable in 1–2 days. Ideal for small households upgrading from a single-chamber septic tank.
- 1.4m³ factory Bio Tank unit supplied
- 3-chamber treatment built in
- Soakaway outlet connection
- Bacterial inoculation at commissioning
- NEMA compliance documentation
Mid-Size Home
The top-selling Bio Tank in Kenya for 2026 — handles growing families and small commercial kitchens. Installed in 2–3 days from clearance to commission.
- 2.5m³ Bio Tank unit — growing families
- 3-chamber treatment built in
- Soakaway outlet & connection
- Bacterial inoculation at commissioning
- 5-year workmanship guarantee
Large / Commercial
Kenya's largest standard Bio Tank — handles schools, lodges, and offices up to 35 daily users. Fast 2–4 day installation with full NEMA and KESSHA documentation.
- 3.0m³ Bio Tank — schools, lodges, offices
- Peak-demand 3-chamber treatment
- Full soakaway outlet system
- Full NEMA compliance suite
- KESSHA-ready documentation
Free Sizing Consultation
Tell us your daily user count and property type — we'll recommend the right size and system, confirm if Bio Tank suits your soil conditions, and quote within 24 hours.
- Site assessment — soil, water table, space
- Sizing calculation included at no charge
- Concrete vs Bio Tank recommendation
- Fully itemised quote within 24 hours
- No commitment until you approve
Concrete vs Bio Tank — Choose the Right System
Both deliver full 3-chamber treatment and meet NEMA standards. The decision comes down to site conditions, timeline, and budget. Not sure? Our free site assessment decides it for you.
| Factor | Concrete | Bio Tank (Plastic) |
|---|---|---|
| Treatment quality | ✅ Full 3-chamber | ✅ Full 3-chamber |
| Structural lifespan | 30–50 years | 25+ years |
| Installation time | 2–6 days (site-built) | 1–3 days (ready-made) |
| Installer required | HSE-trained team | Any qualified plumber |
| High water table | Ideal — reinforced | ⚠ Less suited |
| Custom sizing | Yes — fully customisable | Fixed: 1.4 / 2.5 / 3.0m³ |
| Relocatable | No — permanent | Yes — can be relocated |
| Starting price | From KSh 115,000 | From KSh 98,500 |
| Best for | Permanent builds, rocky/high-water-table sites | Standard residential, fast-build projects |
Not sure which to choose? Book a free site assessment — our team evaluates your soil, water table, and household size, then recommends the right system. Call +254 745 426 565 or use the form on this page.
How It Works — NEMA-Compliant 3-Chamber Treatment
Every Omidrop Africa biodigester — concrete or Bio Tank — uses the same proven 3-chamber anaerobic treatment process. Wastewater passes through three sealed chambers in sequence: primary separation, pathogen neutralisation (5+ day retention eliminates worm eggs and bacteria), and final polishing before safe soakaway discharge. No exhauster truck required. No periodic emptying. No contamination risk to soil or groundwater.
Your Return on Investment — Mid-Size Family (2.5m³)
Get Your Quote — Free Site Assessment Included
Fully itemised quote within one working day. No hidden charges, no obligation.
Book Free AssessmentReady to Go Septic-Free?
Concrete or Bio Tank — We Install Both.
Free site assessment. Transparent pricing. NEMA-compliant. 5-year guarantee. 50+ towns. Quote within one working day.
Where We Install — 50+ Towns Across Kenya
Based in Nairobi, Mombasa, and Kisumu with nationwide coverage. Remote sites accommodated — call to confirm your town.
Frequently Asked Questions
Prices start from KSh 98,500 for the Bio Tank 1.4m³ and KSh 115,000 for the concrete 1.4m³ — rising to KSh 225,000 for the concrete 3.0m³ (35 users). All prices cover complete installed systems including NEMA documentation, bacterial inoculation, soakaway outlet, and our 5-year workmanship guarantee. Call +254 745 426 565 for a free itemised quote.
Both use the same 3-chamber biological treatment and meet NEMA standards. The concrete biodigester is a permanent in-ground structure built by our team — lasts 30–50 years, ideal for high water tables or expansive soils, and fully customisable in size. The Bio Tank is a factory-prefabricated plastic unit installable in 1–3 days by any qualified plumber — faster, more affordable upfront, and relocatable, but with fixed sizes and less suited to very high water tables.
Count continuous daily users: up to 10 → 1.4m³; up to 20 → 2.5m³; up to 35 → 3.0m³. For seasonal commercial sites (lodges, guesthouses), use peak occupancy. When between sizes, step up — oversized causes no problems, undersized underperforms. Our free site assessment confirms the right size before any commitment.
No. A correctly functioning biodigester does not require periodic emptying. Organic waste is continuously broken down by anaerobic bacteria inside the sealed chambers, and liquid digestate drains naturally to the soakaway field. Unlike a septic tank where sludge accumulates and must be pumped every 1–3 years, a biodigester reaches equilibrium where inputs and outputs balance. See our exhauster services if your existing system needs siphoning before you upgrade.
Bio Tank installations take 1–3 days. Concrete biodigester installations take 2–6 days depending on size and soil conditions. The bacterial culture takes 3–6 weeks to fully establish — most clients see the system working normally within 4 weeks.
Every installation includes: free site assessment and system design, full excavation and installation by HSE-trained teams, bacterial inoculation at commissioning, full NEMA compliance documentation (signed certificate and engineering drawing), a client operations handbook, and a 5-year workmanship guarantee covering both the system and the quality of the installation work. The price you're quoted is the price you pay — any site-specific supplements confirmed in writing before works begin.
Yes. The 2.5m³ suits small commercial establishments; the 3.0m³ handles schools, offices, and guesthouses up to 35 daily users. For higher loads, we design and install custom concrete systems beyond the standard sizes. School installations include KESSHA compliance documentation. Hotel installations can include digestate outlet systems routed to landscape irrigation.
A well-installed concrete biodigester lasts 30–50 years. Bio Tank plastic units have a lifespan of 25+ years. Both require minimal annual maintenance — primarily an inspection and bacterial culture top-up. Contact us at +254 745 426 565 for our maintenance plans.
Concrete or Bio Tank — We Install Both.
Fairly Priced. Fully Guaranteed.
500+ biodigesters installed. 50+ towns. NEMA-compliant. 5-year workmanship guarantee. Free site assessment. No hidden charges.
Get Your Free Quote
Response within 1 working day · No obligation · No hidden charges
- Bio Tank 1.4m³: From KSh 98,500
- Bio Tank 2.5m³: From KSh 148,500
- Bio Tank 3.0m³: From KSh 192,500
- Concrete 1.4m³: From KSh 115,000
- Concrete 2.5m³: From KSh 175,000
- Concrete 3.0m³: From KSh 225,000
- Custom / Larger: Site Assessment