Krieg & Fischer Ingenieure

What Krieg & Fischer Ingenieure does

Krieg & Fischer Ingenieure GmbH is a privately held German engineering office headquartered in Göttingen that designs and delivers tailor-made biogas plants. Founded in 1989 and operating with a headcount in the 11–50 range, the firm has delivered 178+ reference plants across more than 40 countries, covering a power range from 45 kWel to 8.3 MWel. Its work spans the full engineering lifecycle: basic evaluation, pre-planning, approval planning (German building regulations and BImSchG), execution planning, tendering, contract awarding, site management, and commissioning, plus expert opinions, operator services, and training.

The technical offering is organized around three plant archetypes — agricultural, industrial multi-stage fermentation, and biowaste/kitchen-waste digestion — with substrate-specific pretreatment and both wet/dry and mesophilic/thermophilic process configurations. Beyond the core plant, the portfolio includes modules for biogas upgrading to biomethane/RNG, CO2 liquefaction, combined heat and power (CHP/CCHP), Power-to-Gas, and Methanation (H2 to CH4 / Bio-SNG), positioning the firm at the intersection of biogas, biomethane, and hydrogen value chains. Two principals, Torsten Fischer and Raphael Thies, hold publicly appointed and sworn expert status for biogas plants, an unusual regulatory credential.

The business model is project-based professional services with quote-driven pricing tied to scope, complexity, and plant size, delivered directly by the engineering team and supported by a partner network in 8 countries. Revenue is not publicly disclosed; no external funding, acquisitions, or subsidiary structures have been identified. Customer concentrations span sugar industry (Dinteloord, Polska), bioethanol (Rio Cuarto II), agriculture (Velen, Falkenstein), food processing (Prince Edward Island), and commercial/municipal waste across Europe, Asia, Africa, and the Americas.

Name

Krieg & Fischer Ingenieure

Legal name

Krieg & Fischer Ingenieure GmbH

Website

https://kriegfischer.de

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

11–50 employees

Short description

Krieg & Fischer Ingenieure GmbH is a German engineering firm in Göttingen that designs and delivers tailor-made biogas plants — covering agricultural, industrial, and biowaste substrates — plus biomethane upgrading, CO2 liquefaction, and methanation modules, serving enterprise clients globally.

Ownership category

akta.pro rank

Product category

Biogas Plant Engineering Services

NAICS

Oil and Gas Field Machinery and Equipment Manufacturing (333132)

SIC

Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Biogas/RNG Plant Development, EPC & Project Delivery (EUAAAEAH)

akta.pro secondary industries

RNG Upgrading, Purification & Conditioning (Membranes, PSA, Amine, Cryogenic) (EUAAAEAD), Digestate Processing, Nutrient Recovery & Fertilizer Products (Struvite, Ammonia, Compost) (EUAAAEAL), Organics-to-Energy & CHP from Biogas (On-site Power/Heat) (EUAIAEAG)

Keywords

• Biogas plant engineering
• Biomethane upgrading systems
• Anaerobic fermentation technology
• Renewable energy engineering
• Organic waste digestion plants

Headquarters

HQ city

Göttingen

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Engineering and Planning Services: Complete engineering services for biogas plants including design, planning, approval planning (building regulations, BImSchG), execution planning, preparation and involvement in awarding contracts, overall construction management, and commissioning. Also includes consulting services, surveys, expert reports, insurance reports, studies, plant optimization measures, technical safety inspections, operator services, and training courses.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Krieg & Fischer Ingenieure GmbH is a German engineering office providing full-scope planning, design, approval, construction management and commissioning services for tailor-made biogas plants. The firm delivers custom plant configurations covering agricultural substrates, complex multi-stage industrial fermentation of food and bioethanol residues, and biowaste/kitchen waste digestion, along with biogas upgrading to biomethane, CO2 liquefaction, CHP generation, power-to-gas and methanation modules.

Product overview

Krieg & Fischer Ingenieure GmbH is a German engineering company specializing in the planning and construction of tailor-made biogas plants. The core offering consists of custom-designed biogas plant systems that combine various modules and services: Agricultural biogas plants for farm-scale operations processing slurry, manure, and energy crops; Industrial biogas plants for multi-stage fermentation of food industry waste; and Digestion plants for biowaste and kitchen waste. Key technology modules include Biogas upgrading to biomethane/RNG, CO2 liquefaction, CHP (combined heat and power) generation, Power-to-Gas, and Methanation (H2 to CH4/Bio-SNG). Supporting services encompass complete engineering (from concept to commissioning), expert opinions for courts and insurance companies, operator services, and education/training courses. The company has over 35 years of experience with more than 178 reference plants in over 40 countries worldwide, ranging from 45 kWel to 8.3 MWel capacity.

Differentiator

Problem solved

Functional benefit

Products and services

• Biogas Plants (Custom/Tailor-made)

Quantifiable outcome

• 178+ reference biogas plants delivered worldwide with power range from 45 kWel to 8.3 MWel
• +1 more outcomes

Named customers6 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Six partnerships are on record, tiered minor.

• Verband Deutscher Gerichtssachverständiger e.V. (VDGS)minorOthersProfessional association membership for German court-appointed experts. Krieg & Fischer engineers serve as publicly appointed and sworn experts for biogas plants.
• Biogas WorldminorOthersInternational biogas industry platform and community membership for networking and industry visibility.
• TÜV NordminorOthersCertified specialist company according to WHG (Water Resources Act). TÜV Nord certification for operating facilities requiring specialist company status.
• Deutscher Verein des Gas- und Wasserfaches e.V. (DVGW)minorOthersGerman Technical and Scientific Association for Gas and Water membership. Industry association for gas sector professionals.
• H2 Allianz (H2 Alliance)minorOthersHydrogen alliance membership in Southern Lower Saxony supporting hydrogen economy development, relevant to company's power-to-gas and methanation capabilities.
• Fachverband Biogas (German Biogas Association)minorOthersGerman Biogas Industry Association membership for industry representation and networking.

Scale indicators5 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• BioConstruct GmbH: BioConstruct is a German EPC contractor specializing in industrial and agricultural biogas plants, with emphasis on large-scale projects. It is a direct competitor for industrial-scale biogas engineering work.
• PlanET Biogas Group GmbH: PlanET Biogas is a German-Canadian manufacturer and EPC contractor of biogas plants, with strong agricultural and waste-to-energy offerings. It directly competes with Krieg & Fischer across European and North American markets.
• agriKomp GmbH: agriKomp is a German manufacturer of agricultural and industrial biogas plants with proprietary container and module technology. It is a direct competitor in the German farm-scale and agri-biogas EPC segment.
• Weltec Biopower GmbH: Weltec Biopower is a Germany-based manufacturer of biogas and biomethane plants using stainless-steel modular designs. It directly competes with Krieg & Fischer on agricultural and industrial biogas EPC across Europe and internationally.
• Hitachi Zosen Inova (Schmack Biogas): Hitachi Zosen Inova acquired Germany's Schmack Biogas and operates one of the largest biogas EPC and service businesses in Europe. It is a direct competitor with greater scale and parent-company backing than Krieg & Fischer.
• Anaergia Inc. Anaergia is a Canadian-based renewable energy company with strong biogas and organics-to-energy EPC capabilities, including anaerobic digestion plants. It is a direct competitor for international industrial-scale biogas projects.
• MT-Energie GmbH: MT-Energie is a German manufacturer of biogas plants with focus on agricultural substrates, biomethane upgrading, and CHP integration. It directly competes in the German farm-scale and biomethane EPC market.
• EnviTec Biogas AG: EnviTec Biogas is a German full-service biogas plant manufacturer and operator with EPC, components, and plant operation. It is one of the largest direct competitors in the German biogas EPC market and the closest scale comparison to Krieg & Fischer.

Broad incumbents

• Wärtsilä Biogas Solutions: Wärtsilä is a Finnish large-scale engine and energy systems provider with a biogas liquefaction and plant integration business. It competes with Krieg & Fischer in large-scale biomethane and LNG/bio-LNG projects but operates across a much broader energy portfolio.

Regional players

• AAT Abwasser- und Abfalltechnik GmbH: AAT is an Austrian engineering firm specializing in biogas plant design and construction. It is a regional direct peer to Krieg & Fischer, primarily active in Austria and Central Europe, with comparable bespoke plant design capabilities.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

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 Krieg & Fischer Ingenieure