FAQ — questions and answers
657 answers on biogas, biomethane, bioLNG, biohydrogen, waste, regulation and BMP testing. The first sentence of each answer is the gist; details and sources follow.
BMP testing
49 questions
- How does BMP differ from the theoretical methane potential?
- Can a BMP result be transferred directly to a biogas plant?
- Can an installation have a higher yield than BMP?
- Can BMP per gram of VS be compared with BMP per tonne of fresh matter?
- Can every BMP test be ended after 30 days?
Biogas
49 questions
- How does an agricultural biogas plant differ from a waste-processing one?
- Are the data in the article up to date?
- What is the difference between a biogas plant's capacity and the energy it produces?
- How does biogas differ from biomethane?
- Can a biogas plant operate flexibly?
Biomethane
36 questions
- Are biomethane and natural gas chemically the same?
- Can a household buy biomethane?
- Can biomethane be blended with natural gas in the grid?
- Can biomethane be delivered to the gas grid by road transport?
- Does biomethane compete with hydrogen?
BioLNG and bioCNG
19 questions
- Can bioLNG come from biomethane injected into the grid?
- Can LNG lorries run on bioLNG?
- Does bioLNG help meet the EU CO₂ standards for lorries?
- How does bioLNG differ from bioCNG?
- How does bioLNG differ from LNG?
Biohydrogen
19 questions
- Can hydrogen be added to the gas grid?
- Does the agreement with Hyphen mean construction has started?
- Does the roadmap say anything about biogas?
- How does photofermentation differ from dark fermentation?
- How should promises about a new biohydrogen technology be assessed?
Waste-to-energy
52 questions
- Are incinerator measurement results public?
- Are waste incinerators safe for their surroundings?
- Which is better for bio-waste: a biogas plant or an incinerator?
- Can any waste be burned in a cement plant?
- Can pyrolysis replace an incinerator?
Waste and circular economy
69 questions
- Are Eurostat data and the national calculations for municipalities the same?
- Is garden green waste suitable for biogas plants?
- Are windrows in the open enough for composting kitchen waste?
- Are slurry and manure a by-product that must be notified to the marshal?
- Can 3D printer filament be made from bottle caps?
Law and regulation
122 questions
- Are slurry and manure UPPZ?
- Are there regulations on odour nuisance from biogas plants in Poland?
- Are these the final rates?
- Can a 1 MW Lithuanian biogas plant get a feed-in tariff?
- Can a biogas plant accept animal by-products?
Digestate and fertilisers
32 questions
- Can digestate be composted?
- Can digestate be stored in an open lagoon?
- Does digestate contain more nitrogen than raw slurry?
- Does digestate contain pathogens?
- Does digestion alone replace hygienisation?
Technology and operation
69 questions
- Are qualifications needed to operate an OGI camera?
- At what ammonia concentration is digestion inhibited?
- Can a heating cable replace insulation?
- Can acidification be recognised from pH alone?
- How does a cooled OGI camera differ from an uncooled one?
Market and investment
73 questions
- After 28/12/2024, does every negative hour remove support?
- After the price fall in 2023, was FIT better than the day-ahead market again?
- Are subsidies for biodigesters necessary?
- Can a biogas plant selling at the day-ahead price (RDN) earn as much as on FIT?
- Can a farmer have their own biogas plant?
Emissions and climate
32 questions
- Can biogenic CO₂ from a biomethane plant give negative emissions?
- How does the Climate Law differ from the Green Deal?
- Which is better for the climate: composting or digestion of bio-waste?
- Do biogas plants leak methane and how can this be limited?
- Do biogas plants really help the climate?
Cogeneration and engines
2 questions
- Are two CHP engines treated as a single installation?
- Does a biogas plant CHP unit always require an air emission permit?
Process biology and start-up
5 questions
- In winter, is heat from the CHP engine enough to sustain the process?
- Is insulation of the digester tank more important than pipework insulation?
- What is a starter for a biogas plant?
- What is inoculum?
- Why can pH alone warn too late?
Operation and failures
2 questions
- Does adding glycol to the protective liquid solve the frost problem?
- How often should the heating of the safety device be checked?
Safety and ATEX
2 questions
All questions: Safety and ATEXTanks and membranes
4 questions
- Can a biogas membrane leak at the edge?
- Does every biogas membrane have a keder?
- Is a pressure test needed to check tightness?
- Is the smell of biogas enough to detect leaks?
About the site
21 questions
- Can I rely on the BMP values from the service when designing a biogas plant?
- Does the site's content replace expert advice or a design?
- Does the site compare results from different temperatures?
- How is the weighted average BMP calculated in the service?
- How often is the site's content updated?