Knowledge Hub · Voice & AI ready

Ask anything about turning CO₂ into value.

Plain-language answers on carbon capture, microalgae, biomethane, hydrogen, fuels, biochar, and carbon credits — each written as a short spoken answer and marked up so voice search and AI assistants can read it aloud.

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Answers written
9
Topic clusters
FAQ + Speakable
Schema embedded
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Demo
4BT
Hi — ask me anything about 4BlueTech's technology or the science behind it. Try a question below, or type your own.
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4BT
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The answer library

Every answer, written to be spoken.

Each question opens with a 40–60 word spoken answer a voice assistant can read aloud, followed by the full explanation and related questions to keep the conversation going.

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Optimised for voice & AI

Written for people. Structured for machines.

The same answers are marked up with schema.org so search engines, voice assistants, and AI chat tools can pull a clean, spoken response — not scrape a wall of text. This page carries live FAQPage and Speakable markup, generated from every answer above.

Spoken-answer snippets

Every question leads with a 40–60 word answer written to be read aloud — the length a voice assistant returns and the format featured snippets reward.

FAQPage schema

All answers are emitted as structured question-and-answer pairs, so assistants can match a spoken question to a verified answer instead of guessing.

Speakable selectors

Speakable markup points assistants at exactly which elements to voice — the question and its spoken answer — for a clean hands-free reply.

Embedded on this page application/ld+json 
{
  "@context": "https://schema.org",
  "@type": "FAQPage",
  "mainEntity": [{
    "@type": "Question",
    "name": "What is biomethane?",
    "acceptedAnswer": {
      "@type": "Answer",
      "text": "Biomethane is renewable methane made
        by purifying biogas until it's almost
        identical to fossil natural gas…"
    }
  }],
  "speakable": {
    "@type": "SpeakableSpecification",
    "cssSelector": [".qa-question", ".qa-spoken"]
  }
}

Have a question that isn't answered here?

This library grows with the questions people actually ask. Tell us the topics your customers, partners, or investors raise and we'll write the next batch in this same voice-ready format.
Technology

Biological carbon capture, engineered into a container.

Four parts do the work: a living reactor, the container that houses it, the software that records it, and the commercial model that deploys it. This page explains each one and how a gas stream moves through them.

Technology on the main site →
Sources & further reading

How a gas stream becomes a product

Six stages, all inside one 20-foot module. Every stage writes to the same record.

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The four layers of the platform

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Where the modules go

Concentrated point sources first — where each captured tonne costs the least energy to separate.

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Biological versus chemical capture

Dimension
Amine / solvent capture
Aloreactor (biological)
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Qualitative comparison of process characteristics. Neither route is universally better — solvent capture reaches very high purity CO₂ streams, while biological capture converts carbon into product without a regeneration cycle.

Questions about the technology?

The answer library covers capture, algae, reactors, and traceability in plain language.

Ask & learn →
Bibliography
Biomethane

Upgrading biogas without throwing the carbon away.

Every upgrading method separates methane from CO₂. Most then vent that CO₂. Biological upgrading feeds it to algae instead — so a disposal cost becomes a second product. This page walks the whole chain, from feedstock to injected gas.

Biomethane on the main site →
Sources & further reading

From waste to grid gas

Five stages. The one that usually wastes carbon is stage four.

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Upgrading methods compared

Same job, very different trade-offs — and very different fates for the removed CO₂.

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Removed CO₂
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What biomethane is used for

Its advantage is that it needs no new end-use infrastructure. The same molecule that heats a home fuels a truck or a ship once liquefied — the pipes, burners, and engines already exist.

The double climate benefit

The feedstocks would release methane directly if left to decompose — a far stronger greenhouse gas than CO₂ over a century. Capturing it avoids that release and displaces fossil gas.

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Common questions

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More answers →
The technology
Bibliography & reading map

Where our answers come from.

Not an alphabetical dump. The evidence base is organised into four families of knowledge, each broken into reading packs — short curated bundles you can work through in one sitting, with a stated purpose and depth level.

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How to use this bibliography

Pick the family closest to your question, then the pack whose stated purpose matches why you're reading. Orientation packs are for getting the shape of a topic in twenty minutes; Working packs are for people who have to make a decision; Technical packs assume process engineering background; Regulatory packs are for compliance and claims.

Editorial note

This is a curated reading map of the institutional and peer-reviewed literature families our explainers draw on — agency outlooks, standards bodies, association handbooks, and journal literature — not a claim of specific citation for every sentence. Entries name the publishing body and document class so you can locate the current edition, since these are revised regularly. Where a number appears in an explainer, it comes from the relevant family below.