OSWALD SCHULZE is founded
Founded in 1911, OSWALD SCHULZE has been a pioneer in wastewater treatment technology since the 1920s and today supplies equipment for municipal and industrial treatment plants.
Our focus
ELIQUO brings together specialist
companies from across Europe
Each company is contributing it's own expertise, technologies and local strengths.
Together, they form a strong network for water and wastewater solutions.
Overview
Our companies
Our locations
Our network across Europe
Regional expertise with shared technical standards and innovation platforms
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ELIQUO WATER GROUP European group of specialist companies
ELIQUO is a European group of specialist companies in the field of municipal water and wastewater treatment.
ELIQUO HYDROK Technologies and solutions for water and wastewater for the UK and Ireland
ELIQUO KGSTULZ Plant construction DACH region and Luxembourg
ELIQUO MALMBERG WATER Designing and building modern waste- and watertreatment plants in Sweden
ELIQUO PMI Water, wastewater and sludge treatment solutions for Norway
ELIQUO TECHNOLOGIES Wastewater and sludge technologies to foster sustainability and net zero carbon
ELIQUO WATER & ENERGY Efficient and sustainable solutions for municipal water and wastewater infrastructure
Provides efficient and sustainable solutions for municipal water and wastewater infrastructure focused on the Dutch municipal water sector.
Richter Steuerungstechnik Switchgear, control, and regulation systems for drinking water, wastewater, and swimming pool water treatment
W.E.T. Design and construction of water treatment and ultrafiltration systems for drinking water and swimming pool water
OSWALD SCHULZE Umwelttechnik Design, construction, commissioning and maintenance of municipal and industrial wastewater and sludge treatment
Timeline
It´s been a journey
See our milestones
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1911
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1945
Partent company of KG Nellingen is founded
In 1945 Klaus Kießling Metall- und Apparatebau was founded.
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1996
HYDROK UK is founded
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2014
ELIQUO establishes itself as a company of SKion Water
ELIQUO was founded in 2014 as part of a family-owned water technology group committed to promoting the sustainable use of water resources.
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2019
KG Nellingen becomes part of ELIQUO
KG Nellingen joined ELIQUO WATER GROUP through a planned succession, united by a shared commitment to sustainable water and wastewater solutions.
OSWALD SCHULZE becomes part of ELIQUO
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2020
ELIQUO TECHNOLOGIES is founded
With over 30 years of EPC experience, ELIQUO TECHNOLOGIES deliver innovative solutions such as THP, sludge drying, advanced treatment, energy efficiency, and nutrient recovery.
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2022
GEAL becomes part of ELIQUO
Since 1st of April, the team at GEAL (Gesellschaft für Elektro-, Automatisierungs- und Leittechnik mbH) is ELIQUO STULZ at the location in Rüsselsheim. This merger further enhances the strengths. of both companies.
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2023
ENWA PMI becomes part of ELIQUO
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2024
ENWA becomes ELIQUO PMI
In 2023, the company gained new owners and is now part of a group consisting of leading European contractors specializing in the design, engineering, and construction of technical water and sewage installations.
Malmberg Water and Malmberg AS become part of ELIQUO
The acquisition of Malmberg Water AB by ELIQUO WATER GROUP marks a key milestone and reinforces the combined strength of both companies in the Nordic water and cleantech market.
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2025
ELIQUO KGN and ELIQUO STULZ merge and become ELIQUO KGSTULZ
ELIQUO KGSTULZ was formed through the merger of ELIQUO KGN and ELIQUO STULZ, combining expertise in municipal water and wastewater infrastructure, automation, engineering, and project delivery.
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2026
W.E.T. and Richter Steuerungstechnik become part of ELIQUO
ELIQUO WATER GROUP acquired a majority stake in inuwat Holding GmbH, strengthening its portfolio with automation solutions from Richter Steuerungstechnik and membrane filtration systems for drinking water and swimming pool water treatment from W.E.T.