♻️ CleanLoop Biogas
Bangladesh's faecal-sludge gap meets viable, profitable biogas-and-fertilizer resource recovery
How CleanLoop Biogas closes the loop
Organic & sanitation waste → Digester → Biogas → Clean cooking → Bio-fertiliser
Untreated waste, and no clean way to fund the fix
Most latrines are never safely emptied; untreated faecal sludge contaminates water and the food chain. And the honest research finding: no one runs human-waste treatment as a self-funding biogas business. So you can't lead with the digester — you lead with the service and the recovered products.
A service that sells what it recovers
Run a paid sanitation service (toilets + emptying) for communities and institutions, safely treat the waste, and sell what's recovered — organic fertilizer, animal feed, and on-site biogas energy. Treatment is run as a contracted public good; the recovered products are the engine. Halal by istihālah — the Islamic principle that complete transformation purifies a substance, so fertilizer/energy recovered from treated waste is permissible.
Layer A breaks even; Layer B carries it
Two layers. Layer A (sanitation) roughly breaks even on pay-per-use + a public FSM service contract. Layer B (recovery) — fertilizer, feed, biogas — is the commercial engine.
How it makes money — and what it needs to close
Needs an FSM (faecal-sludge) programme partner (SNV · WaterAid · Bhumijo) to underwrite the toilet service, plus recovery buyers for fertiliser & biogas. Recovery is the engine; sanitation is subsidised. Manure routes here (biogas C:N balancer) — never to feed.
FSM programme + recovery buyers
pay-per-use + emptying fees · fertilizer/feed · energy · FSM subsidy/carbon
resource recovery (fertilizer/feed); sanitation ≈ break-even
a city/FSM programme buys safe sanitation; buyers buy fertilizer/feed
+41k/site (recovery is the engine; sanitation subsidised)
The toilet loses money; the recovery (fertiliser + biogas) at +41k/site carries it. Manure is the biogas C:N balancer. Needs an FSM partner to underwrite the service.
footfall count + FSM call (SNV / WaterAid / Bhumijo)
Bangladesh's faecal-sludge gap meets viable, profitable biogas-and-fertilizer resource recovery
IDCOL/SNV financed 37,269 digesters; 43% IRR unsubsidised
Sanitation gap costs ~6.3% of GDP · ~5M-plant potential, 150k built
The situation in Bangladesh
In urban Bangladesh roughly 42% of residents depend on on-site sanitation, yet faecal sludge is handled mostly by uncoordinated, informal pit-emptying markets rather than formal treatment, leaving a major safety and treatment gap 1. The cost of that gap is staggering: the World Bank's Water and Sanitation Program estimated inadequate sanitation cost Bangladesh Tk 295.48 billion in 2010, about 6.3% of GDP, with around 40% of people still relying on shared, rudimentary facilities 5. At the same time the country generates roughly 124 million tonnes of livestock and urban waste each year and could in principle support about 5 million biogas plants, but only around 150,000 have ever been built 6. The same waste streams that threaten public health are therefore a largely untapped energy and fertilizer resource sitting in plain sight 6.
Our pitch
CleanLoop Biogas runs a paid faecal-sludge-management service and pays for itself by selling what it recovers, because faecal sludge and organic waste can be converted by anaerobic digestion into biogas energy, soil-conditioning biofertilizer and feed 2. The unit economics are proven, not hypothetical: a 2022 Heliyon study of 300 household biogas plants in Bangladesh measured a net annual benefit of about USD 295 per plant and a 43% internal rate of return even without subsidy 3, and decentralized recovery elsewhere has cut household energy costs by up to USD 2.07 per day and fertilizer costs by up to 72.6% 8. Our real wedge is operations: that same study showed plant survival hinges on follow-up maintenance service (p<0.001) and operator training (p=0.045), so CleanLoop builds the recurring service-and-training layer that informal markets lack 3, and we raise yields by co-digesting cow manure — slightly below the optimal 20–30 C:N ratio on its own — with higher-carbon waste to stabilize digestion 4. The deployment-and-finance model is already de-risked in-country: under the National Domestic Biogas and Manure Programme, IDCOL with SNV financed roughly 37,269 household digesters between 2006 and 2012 7. We are honest that scaling FSM-fed digesters to community scale still needs field validation, but the core economics and the operations gap they expose are well-evidenced 23.
Built so the operator never fails
HelperChain doesn't hand out a loan and walk away. Every operator gets the full rail — inputs, training, finance, supervision, and a guaranteed buy-back of what they produce. We carry the risk so an ordinary person can succeed.
The tools, inputs and hands-on training to start — turning organic & sanitation waste into a working operation. No prior capital or expertise required.
Pay-as-you-go, riba-free finance makes a poor person a funded operator — with no debt if a cycle fails. The network carries the downside, not the operator.
Ongoing follow-up and quality assurance — the factor peer-reviewed evidence shows decides whether ventures survive (p<0.001). The operator is never left alone.
We commit to purchase the output at a fair, pre-agreed price — so there is always a market. The operator just produces; we guarantee the offtake. This is what removes the fear of failure.
A thin margin funds the next operator — so help compounds and the network grows stronger with every person it lifts.
Sources (8)
- 1.Hasan, M. M. et al. (2022). Assessment of urban sanitation status and management gaps in a metropolitan city, Bangladesh. Frontiers in Water. link
- 2.Diener, S. et al. (2014). A value proposition: Resource recovery from faecal sludge. Resources, Conservation and Recycling, 88, 32-38. link
- 3.Bedana, D. et al. (2022). Financial and functionality analysis of a biogas plant in Bangladesh. Heliyon, 8(9), e10727. link
- 4.Wang, X. et al. (2014). Effects of Temperature and C/N Ratio on Anaerobic Co-Digestion of Manure and Rice Straw. IJERPH, 11(8), 8083-8097. link
- 5.World Bank (2024). Towards a cleaner Bangladesh (citing WSP, Economic Impacts of Inadequate Sanitation). World Bank Blogs. link
- 6.The Business Standard (2024). Bangladesh vastly misses out on biogas, organic fertilizer potential. link
- 7.van Hessen, M. (2012). Assessment of Small-Scale Biodigester Programmes: the SNV and Hivos Approach. Energypedia. link
- 8.Mayilla, W. et al. (2026). Biogas and biofertilizer resource recovery from kitchen waste and fecal sludge in decentralized settings. Renewable Energy. link