Biogas Products: A Complete Guide, Whoever You Are and Whatever You’re Looking For

If you’ve landed here searching for “biogas products”, there’s a good chance this page isn’t quite what you expected – because that one short phrase actually covers three completely different searches. Having run this website for years, I can see from the search data that people typing “biogas products” into Google are usually looking for one of three very different things:

1. A student or trainee who’s been set a question like “What are the two biogas products?” and needs a quick, correct answer
2. Someone looking for the UK company called Biogas Products Ltd, based in Brierley Hill in the West Midlands
3. Someone who actually wants to buy biogas-related products and equipment – and this group covers a huge range of different needs, from plant components to the biogas itself

Rather than make you wade through content meant for someone else’s search, I’ve split this guide into three clear sections – jump straight to the one that matches what brought you here, using the links below, or read straight through if you’re simply curious.

Jump to:

• What Are the Two Biogas Products? (The Exam Answer)
• Looking for Biogas Products Ltd, the UK Company?
• Buying Biogas Products and Equipment

1. What Are the Two Biogas Products? (The Exam Answer)

If you’ve been set a question along the lines of “Name the two main products of biogas” or “What are the two constituents of biogas?”, here’s the short, direct answer:

The two main products (constituents) of biogas are methane (CH₄) and carbon dioxide (CO₂).

Biogas is produced when microorganisms break down organic material – food waste, farm slurry, sewage sludge or energy crops – in the absence of oxygen, a process called anaerobic digestion. The resulting gas is mostly methane and carbon dioxide, typically in a ratio of roughly 50–75% methane to 25–50% carbon dioxide, depending on the feedstock and the conditions inside the digester. Small amounts of water vapour, hydrogen sulphide, ammonia and trace gases are usually also present.

It’s worth knowing that methane is the valuable part – it’s the component that burns and releases energy, which is why biogas can be used as a fuel for heating, electricity generation (via combined heat and power, or CHP) or, once upgraded, as a vehicle fuel or for injection into the gas grid as biomethane. Carbon dioxide doesn’t burn and is usually either vented, used elsewhere (for example in horticulture), or stripped out entirely during a process called biogas upgrading to leave a near-pure methane product known as biomethane.

A Related but Different Question: The Two Products of Anaerobic Digestion

Some exam and coursework questions use slightly different wording and are really asking about the process rather than the gas itself – for example, “What are the two products of anaerobic digestion?” If that’s the question in front of you, the expected answer is usually:

• Biogas – the methane/CO₂ gas mixture described above, used as a fuel
• Digestate – the nutrient-rich material left behind after digestion, used as an agricultural fertiliser

If you want to go deeper than a one-line answer – for background reading, a project, or simply out of curiosity – our sister site has a detailed explainer on what biogas is, how it’s made and what it’s used for, and a separate piece on 16 uses for the digestate by-product, which between them cover both halves of the AD process. We’ve also written about how digestate is actually used in agriculture, and on the gas side, how biomethane is produced from raw biogas.

2. Looking for Biogas Products Ltd, the UK Company?

If you searched “biogas products” because you’re trying to find the UK manufacturer called Biogas Products Ltd, you’re in the right place for a pointer, even though we’re a different organisation.

Biogas Products Ltd is a specialist UK manufacturer based in Brierley Hill, in the West Midlands, designing, manufacturing and installing biogas equipment both in the UK and overseas from its own factory. The company’s product range centres on:

• Biogas conditioning equipment – reheaters, dehumidifiers, and cooling systems
• Hydrogen sulphide (H₂S) removal – dry media, biological and chemical scrubbers
• Biogas storage – membrane gas holders, biogas domes and digester covers
• Biogas upgrading equipment, for turning raw biogas into higher-purity biomethane
• Stainless steel fabrications and complete “gas train” installations for AD plants and wastewater sites

The company has a track record on UK wastewater and AD sites – for example, it’s been reported securing multiple gas holder installations across wastewater treatment sites in the UK water industry. You can find their own site and full product listings at biogasproducts.co.uk, and their manufacturer profile on Made in Britain.

If what you actually need is equipment of the kind Biogas Products Ltd supplies – gas holders, scrubbers, conditioning kit and the rest – rather than that specific company, our buyer’s section below covers the wider market, including several of their direct competitors.

3. Buying Biogas Products and Equipment

This is by far the broadest of the three search intents – and if this is why you’re here, “biogas products” could mean almost anything, from a major piece of plant to a specific consumable or a finished output you want to buy or sell. To help us keep improving this resource, we’d genuinely like to hear from you: use the comments at the bottom of this page to tell us exactly what biogas product you’re looking for, and we’ll do our best to point you in the right direction or add it to this guide.

In the meantime, here’s how the “buying biogas products” search intent tends to break down, with links through to the relevant detail on this site.

Biogas Plant Equipment and Specialist Components

If you’re developing or operating an AD plant, “biogas products” most often means the specialist equipment that makes a digester work safely and efficiently – pumps and mixers, gas holders, H₂S scrubbers, flares, biogas upgrading membranes, and gas analysis and flow metering equipment.

A word of caution before you buy: a lot of general-purpose industrial equipment is simply not built for the conditions inside a digester or gas train, and parts not designed for biogas duty are regularly found to be unfit for purpose once installed. When you’re assessing a supplier, check that they use premium-quality materials and machinery built to recognised biogas industry norms, rather than adapted general industrial kit.

For UK projects, make sure installation work complies with the CDM Regulations and that equipment is ATEX/DSEAR compliant wherever it’s used in a hazardous gas area. Cutting corners here tends to show up a few years down the line as corroded or inadequate equipment needing an early refit – often within five years – so it’s also worth insisting on a minimum one-year warranty against manufacturing defects as standard, and asking any new supplier for references from existing AD sites before you commit.

Here is a working list of specialist biogas equipment suppliers, covering the main categories you’re likely to need:

Pumps and Mixing

Landia was one of the first companies into the AD equipment market, and supplies specialist sludge and slurry pumps, mixers and stirrers, along with troubleshooting support for scum, crust build-up and foaming inside reactors. Its GasMix system is a tank-mixing solution used in digesters. See Landia UK or Landia World for international enquiries.

UK Manufacturer: Biogas Products Ltd

As covered in section 2 above, Biogas Products Ltd is a UK manufacturer offering a particularly wide range: micro-CHP systems, biogas cooling systems and dehumidifiers, H₂S scrubbers (biological, chemical and dry media), biogas reheaters, siloxane scrubbers, digestate/slurry separators, biomethane conditioning and biogas upgrading plant, double-membrane biogas domes and holders, single-membrane biogas covers, solids feeder systems, and sludge heat exchangers. See biogasproducts.co.uk.

CHP and Power Generation

GE Power Generation is worth a look if you’re past the gas-conditioning stage and into converting biogas into usable energy on site. Its aeroderivative gas turbines and reciprocating engines are built to run on digester gas rather than conventional natural gas, generating both heat and electricity from the fermentation process – useful where a plant wants to use its own gas rather than sell it on. See GE’s biogas applications page.

Safety, Flares and Digester Cover Equipment

Varec Biogas (USA and Canada) specialises in biogas safety and handling equipment, including waste gas burners and its patented Model 244E enclosed flare (guaranteed 99% destruction removal efficiency), redundant pressure/vacuum relief valves, flame arresters, emergency pressure relief manhole covers, safety selector valves, access and sludge sampling hatches, floating-cover position indicators, pressure relief systems for membrane gas holder intake lines, and combined moisture/H₂S/siloxane removal systems, drip traps and thermally operated shut-off and explosion relief valves. See Varec Biogas products.

Biogas Upgrading (Membrane Separation)

If your interest is specifically in separating methane from CO₂ rather than complete biogas systems, Air Products is a name you’ll come across. Rather than building whole plants itself, it supplies the core separation technology – the PRISM PB membrane, available across six different models – to a network of value-added resellers who build it into a finished upgrading system. The membrane works by splitting the incoming gas stream into two purified outputs: a high-methane stream and a CO₂-rich stream. See Air Products biogas upgrading.

Compressors, Blowers and Flares

Aircom supplies municipalities, landfill sites and water/wastewater treatment system suppliers with landfill gas blowers and flare systems, including rotary vane, piston and multi-stage compressors, RoFlo equipment, Elmo Rietschle, Turbotron, positive-displacement and centrifugal blowers, open and enclosed flares, separators and other biogas accessories.

Biogas Upgrading (Water-Wash)

As an alternative to membrane separation, Greenlane Biogas takes a water-wash approach to upgrading – essentially scrubbing CO₂ out of the gas stream with water rather than chemicals or heat, which is attractive to operators who’d rather avoid consumables and the running costs that go with them. See BiogasWorld products.

Further Suppliers and Directories Worth Checking

• BP (South Africa) – domestic digesters, steel panel tanks, gas storage domes, flares and conditioning equipment: biogassa.co.za
• Wuhan Acme Agro Tech Co., Ltd. (China) – biogas burner stoves and electric stoves with cast-iron burners: product catalogue
• Bio Gas Equipment (BGE) – tanks and equipment: biogasequipment.com
• Alibaba – a broad biogas products directory: Alibaba biogas catalogue
• Groth Corp – biogas control valves: archived product page
• LANDTEC North America – the BIOGAS 5000 portable gas analyser package
• Geotechnical Instruments (UK) Ltd – ATEX-certified fixed and portable gas analysers
• Huesker – geosynthetics for biogas applications: Huesker US
• Also worth checking via the UK AD and World Expo exhibitor list: Advantage Biogas Ltd, Agrico Engineering Sales Ltd, Air Liquide, Clayton Hall Farm Biogas Products Ltd, CNG Fuels Ltd and Cobra Hydro UK Ltd

For gas measurement specifically, we’ve also published detailed buyer’s guides of our own: our full rundown of biogas flow meters, for measuring gas production, and our review of portable biogas analysers for spot-checking gas quality on site.

Know a biogas equipment supplier that should be on this list? Let us know in the comments and we’ll consider adding them.

Biogas, Biomethane and Digestate as Products in Their Own Right

Not every “biogas product” search is about hardware. A growing number of searchers mean the outputs of the digestion process itself – the gas, the upgraded biomethane, or the digestate – as something to be bought, sold, traded or put to use:

• If you’re interested in biogas or biomethane as an energy product, see our explainer on how biomethane is produced and the distinction between raw biogas and grid-quality gas
• If digestate is the “product” you’re after – as a fertiliser, soil improver or feedstock for something else – our 16 uses for biogas digestate article and our piece on using digestate in agriculture are the best starting points

Home and Small-Scale Biogas Products

A different group of searchers want consumer or small-scale biogas products – a home digester for kitchen waste, a biogas cooking stove, or a small storage bag, rather than industrial equipment. If that’s you, start with our home biogas section, which covers small-scale digesters and related products aimed at households and smallholders rather than commercial AD plants.

Biogas Plant Design, Build and Cost

Finally, some searchers typing “biogas products” are really at the start of a whole-plant project rather than shopping for a single component. If that’s where you are, you’ll get more value from our dedicated planning content than from a product list:

• How to plan a small biogas plant
• Biogas plant project and setup cost: a practical guide to CapEx and equipment

Tell Us What You’re Looking For

Because this third search intent covers so much ground – from a single gas sensor to a complete turnkey plant – we can’t list every possible biogas product on one page. If you’ve read this far and still haven’t found what you came for, please leave a comment below telling us exactly what biogas product or equipment you’re trying to source. We read every comment, and where we can we’ll either point you to the right page on this site, suggest a supplier, or use your question to improve this guide for the next person searching for the same thing.

Quick Summary

• Student/exam searcher: the two main products (constituents) of biogas are methane and carbon dioxide; the two products of the wider anaerobic digestion process are biogas and digestate.
• Looking for the company: Biogas Products Ltd is a UK manufacturer in Brierley Hill, West Midlands, supplying gas holders, scrubbers, conditioning equipment and biogas upgrading kit – find them at biogasproducts.co.uk.

Buying equipment or outputs: this covers everything from plant components to biogas, biomethane and digestate as products – browse the links above by category, or tell us what you need in the comments.

[Published August 2018 with the title: “Biogas Products – Examples of Leaders in the AD Plant Service Industry”. October 2026, comprehensively rewritten with a new title.]