AHT CleanTec Solutions

What AHT CleanTec Solutions does

A.H.T. Syngas Technology N.V., operating commercially as AHT CleanTec Solutions, is a Dutch-domiciled (N.V.) engineering company listed on the Frankfurt Stock Exchange Basic Board that designs, manufactures, and operates decentralized CleanTec plants in the 200 kW to 15 MW capacity range, converting biogenic residues into CO2-neutral electricity, high-temperature process heat, and chemical feedstocks. Its core technology is the proprietary Twin-fire (Doppelfeuer) reactor — a dual-zone updraft/downdraft gasifier that yields low-tar, low-ash syngas before gas cleaning — complemented by Hydrothermal Carbonization (HTC) for liquid and pasty inputs (sewage sludge, manure, fermentation residues), and an integrated gas-conditioning train (wet electrostatic precipitator, gas scrubber, hot gas filter). The company holds a granted September 2025 patent for hydrogen production from solid biomass and operates a wholly-owned hydrogen-separation subsidiary (FHT Hydrogen Separation GmbH).

AHT serves three primary customer verticals: industrial companies requiring high-temperature process heat (>400°C) as a substitute for natural gas; agricultural operations with access to biogenic residues; and municipalities/public utilities seeking decentralized sewage sludge and waste treatment with nutrient (P/N) recovery. The company sells plants via direct enterprise field sales and through exclusive channel partners (INNOTEC in Poland, Aremtech in Japan), and is transitioning from a project-based plant manufacturer toward a managed-services operator model where AHT installs and operates plants, delivering energy-as-a-service under long-term contracts. The largest disclosed commercial relationship is a framework agreement with a Japanese partner worth hundreds of millions of euros (first call-off in the high seven-figure range). Recent financial disclosures show total operating performance of EUR 11.6 million in H1 2024, with FY2023 audited sales growth of 1,927% and H1 2024 sales up 70%+ YoY; the company has funded growth via multiple private placements and a fully-placed 2026/2029 convertible bond.

Name

AHT CleanTec Solutions

Legal name

A.H.T. Syngas Technology N.V.

Website

https://aht-cleantec.com

Company type

Public

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Short description

AHT CleanTec Solutions designs, builds, and operates decentralized 200 kW–15 MW biomass gasification and HTC plants that convert biogenic residues into CO2-neutral electricity, high-temperature process heat, and hydrogen for industrial, agricultural, and municipal customers across Europe, Japan, and the US.

Ownership category

akta.pro rank

Product category

Biomass Gasification and Clean Energy Plants

NAICS

Biomass Electric Power Generation (221117), Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415)

SIC

Cogeneration Services & Small Power Producers (4991), Industrial Process Furnaces & Ovens (3567)

akta.pro primary industry

Thermal Conversion & Advanced Treatment (Pyrolysis, Gasification, Hydrothermal Carbonization) (EUANAHAH)

akta.pro secondary industries

Heat Recovery & Thermal Integration for Biomass Plants (Economizers, ORC, Heat Exchangers) (EUAAAGAL), Emissions Control & Flue Gas Cleanup for Biomass Heat/Power (SCR/SNCR, ESP/Baghouse) (EUAAAGAK), Onsite Low-Carbon Heat & CHP (Electrified CHP, Fuel Cells, Renewable CHP) (EUABAJAI)

Keywords

• Biomass gasification systems
• Hydrothermal carbonization plants
• Decentralized clean energy
• Synthesis gas production
• Biogenic residue processing

Headquarters

HQ city

Bonn

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Supply Chain, Personnel, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Plant Construction and Equipment Sales: AHT designs, manufactures, and installs decentralized CleanTec plants (biomass gasification, HTC, gas conditioning systems) for customers. Plants range from 200 kW to 15 MW. Revenue is generated from equipment sales, engineering, and installation — a project-based, capital-intensive revenue stream. Multiple news items confirm plant orders and deliveries in Germany, Japan, and other markets.
2. Operator / Contracting Model: AHT is strategically transitioning from a pure plant manufacturer to an energy supplier, offering long-term operation of plants. Under this model, AHT installs and operates the plant, delivering energy as a service to customers. This creates recurring revenue streams from plant operation. The company is actively pursuing this model as evidenced by the August 2025 announcement: 'From plant manufacturer to energy supplier.'
3. Technology Licensing and Royalties: AHT licenses its core technologies (Twin-fire reactor, HTC, gas conditioning) to partners and customers. The Japan framework agreement (high seven-figure first project call-off, hundreds of millions framework) suggests technology deployment with potential licensing components. The September 2025 patent grant for hydrogen production from solid biomass further supports the licensing strategy.
4. Fuel Supply and Energy Delivery: AHT offers to supply fuels for the plants or to source the necessary biogenic residues for customers who have access to them. This creates ancillary revenue from fuel logistics and supply, complementing the plant construction and operator models.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels8 records

Core offering

AHT CleanTec Solutions designs, manufactures, and installs decentralized CleanTec plants (200 kW to 15 MW) that thermochemically convert biogenic residues into CO2-neutral electricity, high-temperature process heat, and chemical feedstocks. The integrated offering combines the proprietary Twin-fire gasifier, Hydrothermal Carbonization (HTC), gas conditioning, and hydrogen separation technologies, delivered as engineered plant projects, long-term operator/contracting arrangements, and fuel supply services.

Product overview

AHT CleanTec Solutions (A.H.T. Syngas Technology N.V.) is a hardware-focused company that designs, installs, and operates decentralized CleanTec plants converting biogenic residues into CO2-neutral energy and chemical feedstocks. The portfolio is structured as an integrated process chain: Raw materials (residual materials processing) enter the core technologies — the Twin-fire gasifier for synthesis gas generation and Hydrothermal Carbonization (HTC) for hydrochar production. The synthesis gas then passes through gas conditioning before being utilized for process heat (>400°C), combined heat and power (CHP), or material extraction (C, P, H2). The company offers modular components (wet electrostatic precipitators, gas scrubbers, hot gas filters) and provides services from plant supply to long-term operator models (200 kW to 15 MW capacity range). Strategic transformation underway from plant manufacturer to energy supplier/contracting.

Differentiator

Problem solved

Functional benefit

Products and services

• Decentralized CleanTec Plant Solutions (200 kW – 15 MW) End-to-end engineered plant installations (200 kW to 15 MW) for industrial, agricultural, and municipal customers, converting biomass and biogenic residues into CO2-neutral electricity, high-temperature heat, and chemical feedstocks. Sold under pure plant delivery, fuel supply, or operator models.
• Twin-fire (Doppelfeuer) Synthesis Gas Generator Proprietary thermochemical reactor (0.2 to 10 MW) that converts biomass and biogenic residues into clean synthesis gas via combined updraft and downdraft gasification in two oxidation zones. Serves as the core gas-production unit of AHT CleanTec plants.
• Hydrothermal Carbonization (HTC) Plants Standalone HTC systems that convert liquid and pasty biogenic materials into hydrochar (coal-like solid fuel) and recover phosphorus/nitrogen nutrients. Used by municipalities, agricultural operators, and wastewater utilities to monetize sludge and manure.
• Gas Conditioning Systems Modular syngas cleaning systems that combine cyclone separation, hot gas filtration, wet scrubbing (~1 µm atomized droplets), gas cooling, and wet electrostatic precipitation to bring syngas to <20 mg/Nm³ purity for downstream CHP, furnace, or chemical use.
• High-Temperature Process Heat Generation (>400°C) Industrial high-temperature heat solutions (>400°C) using AHT synthesis gas as a drop-in replacement for natural gas in existing furnaces, iron-ore pellet, clinker/brick, glass, and zinc alloy production, enabling up to 90% CO2 emission reduction.
• Combined Heat and Power (CHP) Generation Decentralized CHP modules that burn conditioned AHT syngas to produce electricity, usable heat, and cooling for industrial, agricultural, and municipal sites.
• AHT Energy Provider (Operator/Contracting Model) Long-term energy-as-a-service contracting model under which AHT installs, owns, and operates the CleanTec plant and delivers electricity, heat, and chemical feedstocks to the customer under multi-year contracts, removing capital burden from the customer.
• Hydrogen Production from Solid Biomass (Patented 2025) Patented process (September 2025) for continuously extracting hydrogen from AHT synthesis gas, integrated via subsidiary FHT Hydrogen Separation GmbH, supporting green hydrogen supply for industrial users and future contracting projects.
• Valuable Materials Recovery (Carbon, Phosphorus, Hydrogen) Systems and processes for recovering valuable materials — carbon (C), phosphorus (P), and hydrogen (H2) — from biomass and HTC process streams, enabling nutrient recycling and value-product generation.

Quantifiable outcome

• CO2 emissions reduced by up to 90% in high-temperature processes while simultaneously reducing energy costs
• +5 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• INNOTECcoreChannel Partner/ Reseller/ Distributor · 19 March 2026AHT and INNOTEC agreed on exclusive cooperation for the Polish market in March 2026. This builds on a long-standing partnership (INNOTEC ENERGY) that led to initial planning and approval contracts starting September 2025. INNOTEC serves as the exclusive channel partner deploying AHT's CleanTec technology in Poland, supporting AHT's geographic expansion strategy in Central/Eastern Europe.
• aremtech (Japan)coreChannel Partner/ Reseller/ Distributor · 20 August 2024Aremtech is a channel partner in the Japanese market. AHT and Aremtech collaborated on the commissioning phase of a biomass power plant in Japan and received new orders. This partnership is instrumental in executing the hundreds-of-millions framework agreement for biomass power plants in Japan — one of AHT's most significant commercial relationships.
• ATNA Industrial Solutions GmbH (acquired assets)minorStrategic or Co-development Partner · 17 July 2024AHT acquired all important assets of ATNA Industrial Solutions GmbH — a recognized specialist for processing technology — expanding AHT's process chain to include material preparation for biomass compaction (briquetting). This acquisition enables AHT to offer more complete solutions including the briquetting of hydrochar produced via HTC, as demonstrated by the first briquetting plant in Brandenburg (September 2024).
• BtX Energy GmbHminorStrategic or Co-development Partner · 17 January 2021BtX Energy GmbH and AHT Syngas Technology received a grant of EUR 630,800 from the German Federal Ministry for the 'Restholzpellets zu Wasserstoff' (wood pellets to hydrogen) project. AHT contributes its gasification technology while BtX leads the overall project coordination. This is a publicly funded R&D partnership to demonstrate hydrogen production from wood pellets.
• FHT Hydrogen Separation GmbHcoreTechnology or Integration · 4 December 2020AHT implemented the purchase of shares in FHT Hydrogen Separation GmbH in December 2020 (and further in March 2021), making it a subsidiary/integrated technology. FHT's hydrogen separation technology is now a core component of AHT's integrated solution for extracting hydrogen from syngas, directly supporting the company's operator/energy supplier strategy.
• Mahnken & PartnercoreStrategic or Co-development Partner · 1 December 2020AHT signed a Memorandum of Understanding with Mahnken & Partner in December 2020 for hydrogen separation from synthesis gas. This partnership is central to AHT's hydrogen strategy, enabling the extraction and purification of hydrogen from syngas for various applications including industrial use and energy storage.
• Japanese Plant ConstructorcoreChannel Partner/ Reseller/ Distributor · 24 April 2020CEO Gero Ferges signed a Memorandum of Understanding with a Japanese plant constructor in April 2020. This MoU laid the groundwork for what became AHT's significant market presence in Japan, including the framework agreement worth hundreds of millions, multiple plant deliveries, and ongoing project activity.

Scale indicators9 records

Recent moves6 records

Expansion highlights7 records

Broad incumbents

• Bright Biomethane: European supplier of biogas upgrading systems (PSA, membranes) for agricultural and waste-to-energy projects. Comparable to AHT in addressing the decentralized biogenic-residue value chain, though focused on RNG upgrading rather than syngas/HTC.
• Valmet Corporation: Finnish process technology supplier with biomass-fired boiler and CHP solutions for pulp/paper, energy and municipal customers. Comparable to AHT in serving industrial and municipal biomass heat/power projects, but at larger plant scale.
• ThyssenKrupp (Uhde / Polysius / tkES): German industrial engineering conglomerate with PRENFLO and other gasification technologies, plus process heat solutions for cement, steel and chemicals. Relevant AHT competitor for high-temperature industrial decarbonization and hydrogen-from-syngas applications.
• Linde Engineering (gasification/H2): Global industrial gases and engineering company offering gasification and hydrogen production technologies. Comparable to AHT where it intersects on hydrogen-from-syngas and large-scale biomass/waste gasification EPC projects.
• Metso Corporation: Finnish industrial process technology group with biomass gasification and heat/power solutions for utilities and pulp/paper customers. Overlaps with AHT on biomass-to-energy equipment, but operates at much larger scale and broader portfolio.

Direct peers

• SunFire GmbH: SunFire develops industrial electrolyzers and Power-to-Liquid systems for green hydrogen and e-fuels from renewable electricity. Comparable to AHT in pursuing decentralized, biomass/renewables-derived decarbonization for industrial off-takers in Germany, with overlapping focus on hydrogen as a future revenue stream.
• Cortus Energy AB: Swedish developer of small-to-medium scale biomass gasification (WoodRoll technology) producing syngas for CHP and industrial heat. Directly comparable to AHT on plant scale (sub-10 MW), feedstock flexibility, and decentralized plant business model.

Regional players

• Sundrop Fuels / Ensyn: North-American pyrolysis technology provider converting biomass to fuel oil. Comparable to AHT on decentralized thermochemical conversion of biogenic residues, but operates primarily in the Americas with a different end product (liquid fuel).

Emerging players

• CarboCulture: Finland-based company commercializing HTC technology for carbon sequestration and soil products. Closely comparable to AHT's HTC process on thermochemical conversion of biogenic residues, but focused on biochar for carbon credits rather than syngas/energy.
• Ingelia S.L. Spanish HTC technology provider commercializing hydrothermal carbonization plants for sludge and biogenic residues. Direct overlap with AHT's HTC value proposition for municipal and agricultural customers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries2 records

Funding overview

Funding rounds1 record

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about AHT CleanTec Solutions