Eliquo Stulz

What Eliquo Stulz does

ELIQUO KGSTULZ GmbH is a German full-service plant constructor headquartered in Grafenhausen, Baden-Württemberg, focused on municipal water and wastewater infrastructure. The company was formed in May 2025 through the merger of ELIQUO KGN GmbH & Co. KG and ELIQUO STULZ GmbH and operates as a member of the Eliquo Water Group. It serves public-sector clients — municipal utilities and wastewater associations (Abwasserzweckverband) — across drinking water treatment, wastewater treatment, sludge treatment and utilization, and rainwater/flood-protection infrastructure, positioning itself as one of the largest German plant constructors in this segment.

Its core differentiator is the proprietary ELOVAC® vacuum degassing system, a registered trademark with roughly a decade of field deployment, designed to capture methane from digested sludge, improve dewatering efficiency, reduce chemical consumption, and prevent struvite build-up. Documented outcomes at the Waldachtal facility include ~400 tonnes CO2-equivalent annual savings, a one-percentage-point improvement in sludge dewatering, phosphate reduction from 100 mg/L to 30 mg/L, and 20–30% savings on iron-precipitation chemicals.

The business operates on a turnkey EPC-plus-services model: project-based plant construction (mechanical, electrical, and automation engineering through assembly, commissioning, and after-sales service) supplemented by technology licensing and deployment of ELOVAC® to international clients. Pricing is set through competitive public procurement with no published rates. Distribution is direct enterprise field sales to municipal governments and wastewater associations in Germany, with international ELOVAC® deployments including a UK £40 million climate-neutral wastewater plant. Marketing combines trade-show presence (IFAT 2026), corporate social channels (LinkedIn, Instagram, XING, YouTube), and group-level employer branding via the Eliquo Water Group.

Name

Eliquo Stulz

Legal name

ELIQUO KGSTULZ GmbH

Website

https://eliquostulz.com

Company type

Private

Founded year

2025

Operating status

Operating

Headcount range

501–1,000 employees

Short description

ELIQUO KGSTULZ GmbH is a German turnkey plant constructor serving municipal governments and wastewater associations with drinking water, wastewater, sludge-treatment, and flood-protection infrastructure, anchored by its proprietary ELOVAC® vacuum degassing technology for sludge methane capture.

Ownership category

akta.pro rank

Product category

Wastewater Treatment Plants

NAICS

Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing (333413)

SIC

Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)

akta.pro primary industry

Methane Abatement Projects (Landfill Gas, Manure, Coal Mine Methane, O&G Methane) (EUABABAL)

akta.pro secondary industry

Chemical Tank Cleaning, Decontamination & Turnaround Waste Services (BPALAHAH)

Keywords

• Wastewater treatment plants
• Municipal water infrastructure
• Sewage sludge treatment
• Vacuum degassing technology
• Drinking water treatment engineering

Headquarters

HQ city

Grafenhausen

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Plant Construction & Equipment Sales: Design, engineering, manufacturing, and installation of municipal water and wastewater treatment infrastructure. Revenue generated from turnkey plant construction projects for public sector clients.
2. Technical Services & Maintenance: Ongoing service, maintenance, and support for installed equipment and treatment systems. Provides technical services covering mechanical engineering, electrical engineering, and automation systems.
3. Technology Licensing & Deployment: Deployment of proprietary ELOVAC® vacuum degassing technology at municipal wastewater facilities, generating both upfront implementation revenue and ongoing technology support.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels6 records

Core offering

ELIQUO KGSTULZ GmbH designs, engineers, manufactures, assembles and commissions municipal water, wastewater and sewage sludge treatment plants, including drinking water treatment plants, wastewater treatment plants, sludge treatment systems, and rainwater/flood protection infrastructure. The company's proprietary ELOVAC® vacuum degassing technology captures methane emissions from sludge (digestate) treatment and is offered as a core technology integrated into turnkey plant projects, complemented by mechanical, electrical and automation engineering plus ongoing service and maintenance.

Product overview

ELIQUO KGSTULZ is one of the largest German plant constructors for sustainable water/wastewater treatment and sludge utilization in the municipal sector. The company offers a unified portfolio combining ELOVAC® vacuum degassing technology (its core patented product for methane capture and sludge treatment) with complete plant engineering services including Trinkwasser, Abwasser, Klärschlammbehandlung, and Regenwasser und Hochwasserschutz. These are supported by integrated service offerings in Maschinentechnik, Elektrotechnik, Automatisierung, and Service und Wartung — covering the full lifecycle from machine and electrical engineering design through automation to installation, commissioning, and ongoing maintenance. The company operates as a single unified entity following the 2025 merger of ELIQUO KGN and ELIQUO STULZ.

Differentiator

Problem solved

Functional benefit

Brands

• ELOVAC®: Vacuum degassing technology for sewage sludge treatment that captures methane emissions from sludge treatment processes

Products and services

• ELOVAC® vacuum degassing technology Proprietary vacuum degassing technology for digestate/sludge treatment that captures methane emissions, improves sludge dewatering efficiency by approximately 1 percentage point, reduces phosphate levels from 100mg/L to 30mg/L, achieves 20-30% savings in iron precipitation chemicals, and eliminates struvite buildup and odors. Deployed at over 20 wastewater treatment facilities worldwide.
• Drinking Water Treatment Plants (Trinkwasser) Construction of complex drinking water treatment plants for public-sector clients, including engineering, assembly, commissioning, and ongoing service while maintaining continuous water supply operations.
• Wastewater Treatment Plants (Abwasser) Construction of efficient and sustainable municipal wastewater treatment plants (Abwasser) for public sector clients, representing German plant engineering expertise in turnkey municipal wastewater solutions.
• Sludge Treatment Solutions (Klärschlammbehandlung) Complete sludge treatment solutions spanning efficient sludge digestion (Faulung) through energy-optimized drying, designed to maximize biogas recovery and minimize disposal costs for municipal wastewater operators.
• Rainwater and Flood Protection Systems (Regenwasser und Hochwasserschutz) Municipal rainwater retention basins and flood protection systems engineered to operate reliably and efficiently even under extreme weather conditions for public-sector clients.

Quantifiable outcome

• 400 tonnes CO₂ equivalent annual savings per installation
• +4 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Four partnerships are on record, tiered minor and core.

• HOHOHO.workminorStrategic or Co-development Partner · 1 October 2025ELIQUO KGSTULZ joined HOHOHO.work, a new initiative for recruiting and retaining skilled workers in the Waldshut district, part of the 'best southwest' regional workforce initiative.
• Eliquo Water GroupcoreStrategic or Co-development PartnerELIQUO KGSTULZ is a member of the Eliquo Water Group, a larger water technology group. The company website displays 'MEMBER OF ELIQUO WATER GROUP' branding and links to the group website eliquowater.com.
• SKZ – Das KunststoffzentrumminorStrategic or Co-development PartnerSKZ (Das Kunststoffzentrum) awarded ELIQUO KGSTULZ as 'Premiumpartner Bildung 2025' recognizing excellence in vocational training and education partnerships.
• UK Climate-Neutral Municipal Wastewater InvestmentcoreStrategic or Co-development PartnerUK government investing £40 million in a climate-neutral municipal wastewater plant incorporating ELIQUO's ELOVAC® technology across over 20 global projects.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Xylem: Xylem is a global water technology leader serving municipal wastewater with biological treatment, pumping, and methane-related process equipment. Its portfolio (including legacy Evoqua) is the closest large-scale comparison to Eliquo KGSTULZ's combination of plant construction and sludge/biogas technology.
• ANDRITZ: ANDRITZ supplies sludge digestion, dewatering and drying equipment (e.g., belt thickeners, dryers, pump units) for municipal wastewater treatment plants worldwide. The Klärschlammbehandlung portfolio of ELIQUO KGSTULZ overlaps directly with ANDRITZ's separation and sludge-processing product lines.
• Huber SE: Huber SE is a German manufacturer of wastewater and sludge treatment equipment (screening, grit removal, sludge thickening, MBR systems). It directly competes with Eliquo KGSTULZ for municipal plant mechanical equipment supply and shares a comparable German industrial base.
• De Nora: De Nora supplies electrochemical and filtration water treatment technologies to municipal and industrial customers, including phosphate removal solutions that directly mirror the 100→30 mg/L phosphate reduction outcome Eliquo KGSTULZ reports with ELOVAC®.
• Aquatech International: Aquatech is a water and wastewater EPC specialist serving municipal and industrial clients, including reuse, desalination and biogas-to-energy projects. Its EPC delivery model and municipal/industrial dual focus are closely comparable to Eliquo KGSTULZ's turnkey plant-construction business.

Broad incumbents

• Veolia Water Technologies: Veolia is the largest global water services group, operating municipal wastewater treatment plants and offering methane-capture / biogas solutions (Hubgrade, BioThelys). It is comparable in customer base and end market, though far broader in scope than Eliquo KGSTULZ's specialized plant-construction focus.
• Suez Water Technologies & Solutions: Suez operates extensive municipal water and wastewater infrastructure globally, including advanced sludge treatment and methane abatement. It overlaps with Eliquo KGSTULZ on the municipal customer base and decarbonization solutions, but at a much larger scale.
• Pentair: Pentair offers a broad municipal/industrial water treatment portfolio including filtration, pumps, and process equipment. It shares Eliquo KGSTULZ's municipal customer base, though its product line is broader and less specialized in sludge/methane capture.

Emerging players

• Fluence Corporation: Fluence provides decentralized water, wastewater and biogas-to-energy solutions, with a specific emphasis on methane capture and renewable energy recovery. Its product focus is highly analogous to ELOVAC®'s methane-capture mission in the municipal segment.

Regional players

• Hitachi Industrial (Water & Environment): Hitachi supplies municipal water and wastewater treatment systems (including sludge treatment) primarily in Japan and Asia through Hitachi Industrial Holdings. It is a comparable plant-engineering and municipal systems provider, but predominantly serves APAC rather than the European markets where Eliquo KGSTULZ operates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UC_brFGAP0QwxpBuRCwyhSgg/videos
• LinkedInlinkedin.com/company/eliquo-water-group
• Instagraminstagram.com/eliquo_kgstulz
• Facebookfacebook.com/ELIQUOSTULZ

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

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 Eliquo Stulz