Process design
HRT, organic loading and working volume: three checks for digester sizing
Why a tank diameter or a standard retention period cannot establish whether a proposed digester is correctly sized.
3 min readRead article
Compressed biogas / Engineering / Advisory
Engineering the complete CBG project.
From feedstock and feasibility to equipment, execution and plant operation. Practical engineering advice, supported by research and a clear understanding of the project.
The knowledge desk
Technical guidance and policy updates.
Featured technical guide
From a BMP test to a credible plant production estimate
Follow the units from a laboratory BMP result to wet-feed methane potential. See where operating evidence is still needed before making a production commitment.
Wet feed×TS & VS×Methane potential
Read the worked example A calculation framework, with illustrative assumptions and linked research.
Engineering & execution
Expertise across the plant lifecycle.
01
Feasibility & DPR
Establish whether the feedstock, site, gas market and project economics support an investible CBG project before committing to plant capacity or equipment.
Explore scope ↗02Feedstock strategy
Build a supply plan around material that can be collected, stored and fed consistently, with quality and delivered cost under control.
Explore scope ↗03Engineering advisory
Review the interfaces between biological design, civil works, machinery, utilities and gas delivery before they become construction or operating problems.
Explore scope ↗04EPC & turnkey
Coordinate engineering, procurement and construction around a defined feedstock basis, clear package boundaries and an agreed commissioning programme.
Explore scope ↗- 01Feedstock
Quantity, quality & storage
- 02Digestion
Loading, retention & mixing
- 03Gas upgrading
Quality, recovery & power
- 04Gas delivery
Storage, offtake & logistics
- 05Digestate
Treatment, nutrients & dispatch
A process overview. Equipment selection follows the verified feedstock and delivery requirements.
Technical reading
Questions that shape the plant.
Gas systems
Match gas storage to the plant's operating hours
How to connect continuous gas production with shorter upgrading shifts, maintenance interruptions and the usable range of a gas holder.
2 min readRead article
Project economics
How to compare CBG project budgets
How to compare EPC offers and identify costs that can sit outside the quoted plant package.
3 min readRead article
Plant references
Lessons from operating plants.
01
United Kingdom
Apsley Farms: linking farm operations with grid biomethane
An independently published operating-plant example of agricultural feedstock integration and gas-grid supply.
2 min read ↗02Germany
Güstrow: integrating biomethane production with a transport-fuel market
An operator-reported example linking gas production, liquefaction and downstream fuel infrastructure.
2 min read ↗03India
Indore: connecting source-separated waste with a city gas market
A documented municipal Bio-CNG example showing why collection quality, processing and offtake need to be designed together.
2 min read ↗Independent reference facilities. These studies are not presented as Altpreneur project credentials.
Work with Altpreneur
Technical support where the project needs it.
Feedstock and project assessment
Feedstock assessment and project planning before investment.
We identify viable feedstocks, map catchments, arrange sample testing and define procurement systems for feasibility, DPR and process-design decisions.
Explore CBG Consulting - Catchment & seasonality
- Procurement strategy
- Feasibility, DPR & process basis
Apply this to your project
Bring the site, feedstock and operating questions.
We can help define the next study, engineering review or operating intervention.