Technology. Waste Conversion

Turning waste streams into circular molecules and energy.

Gasification, pyrolysis and biological routes that convert solid, liquid and gaseous wastes into hydrogen, syngas, fuels and chemicals, engineered for real feedstock variability, not idealised lab conditions.

How Ionect plugs in

Engineering for messy inputs.

Ionect provides engineering and decision-support for waste-to-X projects, converting solid, liquid and gaseous waste streams into hydrogen, syngas, fuels, chemicals and energy. We work with technology developers scaling novel conversion processes and industrials evaluating waste valorisation, focusing on feedstock variability, gas cleanup, and the techno-economics of routes where the input is rarely clean.

The waste-conversion chain

One integrated chain, five linked blocks.

  1. Step 1
    Waste feedstock
    Municipal / industrial / agricultural / biogas
  2. Step 2
    Pre-treatment
    Sorting, drying, sizing, blending
  3. Step 3
    Conversion
    Gasification / pyrolysis / biological
  4. Step 4
    Gas cleanup & conditioning
    Tars, particulates, sulphur, chlorides
  5. Step 5
    Product
    H₂ / syngas / fuels / chemicals / heat & power

What makes waste conversion hard isn't the headline reactor. It's that the feedstock changes, the contaminants change, the gas cleanup has to be over-engineered for the bad days, and the economics only work if the chain hangs together end-to-end. That's where we work.

Conversion routes & feedstocks

Match the route to the feedstock you actually have.

Two coupled decisions sit at the heart of every waste-conversion project: which route fits the feedstock, and which engineering challenges the feedstock will impose on the chain.

Conversion routes

Gasification

Partial oxidation with O₂ or steam, producing syngas at high temperature.

Products
Syngas (H₂ + CO), heat
Maturity
Commercial
Suited feedstocks
MSW, RDF, biomass, plastics
Ionect's role
Reactor selection, gas cleanup design, integration with synthesis.

Pyrolysis

Thermal decomposition without oxygen, producing bio-oil, char and gas.

Products
Bio-oil, char, pyrolysis gas
Maturity
Commercial-emerging
Suited feedstocks
Plastics, biomass, tyres
Ionect's role
Process configuration, condensation train, upgrading integration.

Anaerobic digestion / biological

Microbial breakdown of organic waste in absence of oxygen.

Products
Biogas (CH₄ + CO₂), digestate
Maturity
Commercial
Suited feedstocks
Food waste, sludge, agricultural slurries
Ionect's role
Upgrading to biomethane, integration with CO₂ capture and synthesis.

Plasma gasification

High-temperature plasma conversion, tolerates difficult mixed streams.

Products
High-quality syngas, vitrified slag
Maturity
Pre-commercial / pilot
Suited feedstocks
Hazardous and mixed wastes
Ionect's role
Energy balance, configuration trade-offs against conventional gasification.

Hydrothermal processes

Wet thermal processing under pressure, no drying step needed.

Products
Bio-crude, gas, char
Maturity
Pre-commercial / pilot
Suited feedstocks
Wet biomass, sludge, algae
Ionect's role
Pilot integration and scale-up engineering.

Feedstocks & their engineering challenges

Municipal solid waste (MSW / RDF)

Mixed household and commercial waste, sorted into refuse-derived fuel.

Typical conversion route
Gasification, pyrolysis
Engineering challenge
Variability, chlorides from PVC, ash and inert content.

Industrial waste

Process residues, off-spec products and non-recyclable byproducts.

Typical conversion route
Gasification, pyrolysis, biological (case-dependent)
Engineering challenge
Heavy metals, sulphur, batch-to-batch variability.

Agricultural & forestry residues

Straw, husks, bagasse, forestry thinnings, manure.

Typical conversion route
Gasification, anaerobic digestion
Engineering challenge
Seasonality, moisture, alkali in ash, logistics.

Plastic waste

Mixed and contaminated plastics not suitable for mechanical recycling.

Typical conversion route
Pyrolysis, gasification
Engineering challenge
Chlorides, additives, char and tar formation.

Biogas & landfill gas

Biogenic methane streams from digestion or landfill.

Typical conversion route
Upgrading, reforming, CO₂ separation
Engineering challenge
H₂S, siloxanes, variable composition over time.

Sewage sludge

Wet organic residue from wastewater treatment.

Typical conversion route
Anaerobic digestion, hydrothermal, gasification (after drying)
Engineering challenge
Very high moisture, heavy metals, pathogens.

We are vendor-independent, we help you match the right conversion route to the feedstock you actually have, not the feedstock the brochure assumes.

Where Ionect plugs in

Six capabilities, across the waste-conversion chain.

Conversion route screening for a given feedstock

Structured trade-off across thermal and biological routes against your real feedstock.

Process design for variable feedstocks

Operating windows, buffer storage and turndown engineered for the bad days.

Gas cleanup & conditioning design

Cleanup trains sized to deliver synthesis-grade gas across the full feedstock envelope.

Integration with downstream synthesis

Coupling waste-derived syngas to e-fuels, hydrogen and chemicals as one chain.

Techno-economic & feedstock-risk assessment

TEA stress-tested against feedstock scenarios, gate fees and policy support.

Pilot & demonstration development

First-of-a-kind unit engineering, pilot integration and commissioning support.

Who we serve in waste conversion

Two audiences, one chain-level engineering team.

For startups & innovators

You're developing a new conversion technology.

A novel reactor, a different feedstock window, a better gas cleanup train. We bring chain-level engineering and gas-cleanup pragmatism to your pilot, for DOPS-style developers, novel pyrolysis and gasification start-ups, and biological route developers.

  • Pilot integration of novel conversion reactors
  • Gas cleanup design tuned to your contaminant envelope
  • Chain-level basis of design for fundraising and offtake
For industrials

You have a waste stream and you're exploring valorisation.

As energy, fuels, hydrogen or chemicals, across waste-management operators, refineries with plastic waste, chemical plants with process residues, and biogas operators upgrading to biomethane or beyond. We screen the routes, stress-test economics against feedstock variability, and produce the engineering basis before you commit.

  • Route screening tailored to your actual feedstock
  • Feedstock-risk-aware TEA and offtake economics
  • Independent engineering basis ahead of FID
Common questions we get asked

Waste-conversion project decisions, answered.

Which conversion route suits which kind of waste?+

Gasification with O₂ or steam fits dry, carbon-rich solids. MSW, RDF, biomass, plastics, and produces syngas suitable for synthesis. Pyrolysis suits plastics and biomass when bio-oil or char are valuable products. Anaerobic digestion is the right fit for wet, biological feedstocks (food waste, sludge, agricultural slurries) and yields biogas. Plasma gasification handles difficult mixed streams at higher cost. Hydrothermal routes target wet biomass without prior drying. We screen the routes against the feedstock you actually have, not an idealised composition.

How do you handle the variability of real waste feedstocks in process design?+

By designing for the bad days, not the brochure. Feedstock characterisation up-front (moisture, ash, chlorides, alkali, sulphur, plastics fraction), explicit operating-window definition, oversized gas cleanup where contaminants are unpredictable, and buffer storage to smooth variability into the conversion step. The economics get stress-tested against feedstock scenarios, not a single design point.

Is waste-derived hydrogen "green," "blue," or something else?+

It depends on the feedstock and what happens to the CO₂. Hydrogen from biogenic waste with CO₂ vented can be low-carbon; with the biogenic CO₂ captured and used or stored, it can be net-negative. Hydrogen from fossil-origin waste (e.g. mixed plastics) sits closer to grey or blue hydrogen depending on capture. Lifecycle assessment with honest waste-attribution rules is the only way to settle this for a specific project.

Can waste conversion compete economically without subsidies or gate fees?+

Sometimes. The economics typically lean on three levers: a gate fee for taking the waste, the value of the product (hydrogen, fuel, chemical), and policy support for low-carbon outputs. Projects with a strong gate fee and a high-value product can stand on their own; commodity-product projects generally rely on a combination. We model each lever explicitly so the project's dependency on subsidy is visible.

How does gas cleanup change between feedstocks, and why is it usually the hardest part?+

Each feedstock brings different contaminants, tars, particulates, chlorides, alkali, sulphur, heavy metals, at different concentrations. Downstream synthesis catalysts are intolerant of even trace contaminants, so the cleanup train has to deliver synthesis-grade gas across the worst feedstock days. It's where most waste-conversion projects underestimate engineering scope, and where we spend disproportionate design effort.

Do you work on biological routes as well as thermal ones?+

Yes. Anaerobic digestion, biogas upgrading and microbial fermentation routes are in scope. The engineering disciplines are different from thermal conversion, but the chain-level questions, feedstock variability, gas cleanup, integration with downstream synthesis or grid, are the same.

Developing a waste-conversion technology, or evaluating waste valorisation for your operations? Talk to us.

Discuss a waste-conversion project