Arionex

What Arionex does

Arionex is an international engineering company specializing in industrial water, condensate, and wastewater treatment technologies, founded in 1989 in Basel, Switzerland by Nicolai Arion. It operates through ARIONEX Wasseraufbereitung GmbH in Reinach, Switzerland and its primary operating subsidiary UAB ARIONEX LT in Kaunas, Lithuania, serving more than 700 companies across 13 industry verticals — fertilizer production, electric power, oil refining, chemicals, food, pharmaceuticals, electronics, metallurgy, paper, glass, textiles, municipal water, and agroindustry — with cumulative installed processing capacity of 30 million cubic meters of water per year. The company holds ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certifications and was awarded the Lithuanian Product of the Year 2016 Gold Medal for a drinking-water pilot station developed with AB Klaipėdos vanduo.

The product portfolio comprises 17 integrated equipment lines spanning mechanical filtration (Arionex MF), ultrafiltration (UF), reverse osmosis and nanofiltration (RO), ion exchange (IX — including proprietary MULTREX and MIXCAT configurations achieving 0.07-0.1 μS/cm conductivity), electrodeionization (EDI), disinfection (UV, ozone), chemical treatment (DS), membrane cleaning (CIP), biological treatment (B), clarification (C), degasification (DG), iron/manganese and activated carbon treatment (F), pumping (P), and the Arionex A automated process control system. The flagship differentiator is FERTARMIX, a zero-discharge demineralization technology patented June 25, 2021 at the Lithuanian State Patent Bureau, which converts ammonium-nitrate-contaminated condensate into boiler-feed-quality water and 18-20% concentrated ammonium nitrate solution for fertilizer production.

Arionex generates revenue through one-time engineered equipment sales, professional engineering and consulting services, short-term equipment rental (0.5-1 m³/h filtration/RO units), and managed maintenance including remote monitoring and membrane cleaning. Go-to-market combines direct enterprise sales with a partner network spanning Switzerland, Lithuania, Germany, the Netherlands, Georgia, and Mauritania, supported by trade-fair presence at IFAT, Aquatech, BrauBeviale, ANNA, and SCIF. Pricing is project-specific with no public list. The ownership structure is founder-controlled with no institutional capital, and recent strategic activity — the Vilnius Airport de-icing wastewater plant (2023) and the EU-funded INESS sodium-ion energy storage R&D project (2024-2026) — signals cautious incremental expansion beyond the core water-treatment franchise.

Name

Arionex

Legal name

Arionex, UAB

Website

https://arionex.eu

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

1–10 employees

Short description

Arionex is a Swiss-founded (1989) industrial water, condensate, and wastewater treatment engineering firm serving 700+ clients across 13 verticals via 17 equipment lines and proprietary zero-discharge (FERTARMIX) ion-exchange technology.

Ownership category

akta.pro rank

Product category

Industrial Water Treatment Equipment

NAICS

Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (3345), Electrical Equipment Manufacturing (33531), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Measuring & Controlling Devices, Nec (3829), Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)

akta.pro primary industry

Water & Wastewater Treatment Plant Equipment (Clarifiers, Aeration, Membrane Systems) (IMAHAEAJ)

akta.pro secondary industries

Monitoring & Control (Dosing Systems, Remote Monitoring, Sensors) (BPABAJAK), Process Start-up & Operational Readiness (ORR) (EUAEAJAF), Emission Control & Scrubbing Equipment (Scrubbers, Dust Collectors, Catalytic Systems) (IMAHAEAK)

Keywords

• Industrial water treatment
• Wastewater treatment systems
• Water demineralization equipment
• Zero discharge technology
• Condensate recycling solutions

Headquarters

HQ city

Reinach

HQ country

Switzerland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Water Treatment Equipment Sales: Design, manufacture, and sale of custom water treatment equipment including filtration, reverse osmosis, ion exchange, UV disinfection, and related systems. Equipment is assembled and tested in their factory before on-site delivery.
2. Engineering and Consulting Services: Consulting, system design, installation, start-up, adjustment, and technical support/maintenance services for water treatment systems.
3. Equipment Rental: Short-term rental of pre-prepared filtration, softening, and reverse osmosis equipment with capacity 0.5-1 m3/h for temporary water treatment needs.
4. Equipment Maintenance Services: Warranty and post-warranty equipment maintenance, remote monitoring, on-site repairs, and membrane cleaning services.

Go-to-market motion3 records

Distribution channels2 records

Marketing channels5 records

Core offering

Arionex designs, manufactures, installs, and maintains custom-engineered water, condensate, and wastewater treatment equipment for industrial enterprises across 13 verticals. Its offering spans an integrated ecosystem of 17 equipment lines covering mechanical filtration, ultrafiltration, reverse osmosis, ion exchange, electrodeionization, UV/ozone disinfection, degasification, biological treatment, clarification, chemical dosing, and automated process control — delivered as turnkey solutions from consulting through commissioning, plus short-term equipment rental and post-warranty maintenance services.

Product overview

Arionex is an international engineering company providing comprehensive water, condensate, and wastewater treatment solutions for over 25 years. The product portfolio consists of 17 distinct water treatment equipment lines that form an integrated ecosystem: Arionex MF (mechanical filtration) and Arionex UF (ultrafiltration) provide pre-treatment; Arionex RO (reverse osmosis/nanofiltration), Arionex IX (ion exchange), and Arionex EDI (electrodeionization) handle demineralization; Arionex F (iron/manganese/activated carbon), Arionex C (clarification), and Arionex DG (degassing) offer specialized treatment; Arionex B (biological treatment), Arionex O (ozonation), and Arionex UV (disinfection) address wastewater and disinfection; Arionex DS (chemical treatment) and Arionex CIP (membrane cleaning) support operations; Arionex A provides process control and monitoring. Specialized solutions include Arionex IX Fertarex and FERTARMIX for zero-discharge fertilizer industry applications. The company serves 700+ companies across 13 industry sectors with total water processing capacity of 30,000,000 m³/year.

Differentiator

Problem solved

Functional benefit

Brands

• Arionex WaterCycle: Standardized manufacturing process with integrated quality management system

Products and services

• Arionex MF (Mechanical Filtration)

Quantifiable outcome

• Arionex MIXCAT achieves water conductivity below 0.1 μS/cm vs typical systems at 0.2 μS/cm
• +3 more outcomes

Named customers1 record

Segments13 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

Three partnerships are on record, tiered minor.

• GrundfosminorChannel Partner/ Reseller/ Distributor · 5 May 2017UAB Arionex LT is an authorized Grundfos service partner for dosing and disinfection equipment consultation, maintenance, and repair services. Provides warranty and post-warranty repair services for Grundfos dosing and disinfection equipment.
• AB 'Klaipėdos vanduo'minorStrategic or Co-development PartnerJoint collaboration resulted in 'Drinking Water Preparation, Pilot Testing Station' which won Gold Medal in Lithuanian Product of the Year 2016 competition in the ecology and environmental industry group.
• UAB Modernios E-TechnologijosminorStrategic or Co-development PartnerEU project partner in INESS (Intelligent Na-ion based Energy Storage System) project. Arionex LT participating in R&D activities to develop intelligent energy storage systems using sodium-ion battery technology for homeowners. Project value €795,178.90 with €572,078.58 EU funding.

Scale indicators4 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• De Nora: Provides electrodes, electrochemistry and water-treatment systems including electrodeionization (EDI), disinfection and process water. Comparable to Arionex EDI and Arionex O products, and serves overlapping pharma, electronics and industrial customers.
• Ovivo: Specialist in industrial and municipal water/wastewater treatment equipment including filtration, RO, ion exchange and biological treatment. Closely comparable mid-sized player to Arionex in scope of technologies and customer verticals, particularly in power and chemical.
• Aquatech: Specialist in industrial water and wastewater treatment, including zero-liquid-discharge and minimal-liquid-discharge systems, with a strong focus on power, oil & gas, mining and fertilizer. Closely comparable to Arionex on ZLD/condensate-recycle technology and on the same target verticals.
• H2O Innovation: Pure-play water-treatment systems integrator focused on membrane systems (UF, NF, RO), specialty chemicals and operation & maintenance services. Closely comparable mid-sized engineering firm to Arionex in business model, technology scope and industrial customer focus.

Broad incumbents

• Veolia Water Technologies: The water-treatment arm of Veolia, offering a full portfolio of process water, ultrapure water, wastewater reuse and ZLD solutions globally. Directly comparable to Arionex across all 13 of Arionex's verticals, but at vastly larger scale and with broader geographic coverage.
• Ecolab (Nalco Water): Nalco Water provides industrial water treatment chemicals, equipment and digital services across power, chemical, food and beverage, and primary metals. Comparable to Arionex's Arionex DS chemical dosing line and recurring service model, with a much larger field service force.
• SUEZ Water Technologies & Solutions: Global provider of industrial water and process-water treatment systems, including ion exchange, RO, UF and digital monitoring. Overlaps with Arionex's full product ecosystem (MF, UF, RO, IX, EDI, control) and serves similar fertilizer, power, pharma and electronics customers.
• Xylem: Major global water-technology company with a strong industrial water portfolio (including the legacy Evoqua acquisition) covering filtration, disinfection, demineralization and digital monitoring. Direct overlap with Arionex in IX, RO and process control for power, fertilizer and electronics.
• WATERCARE / Degrémont (SUEZ): SUEZ's municipal and industrial process-water subsidiary, designing and building turnkey water and wastewater treatment plants. Comparable to Arionex's turnkey offering, especially for municipal drinking water and power-industry applications.

Regional players

• EnviroChemie: German-headquartered specialist in industrial water and wastewater treatment, with technology similar to Arionex's portfolio (biological, physico-chemical, membrane) and overlapping European industrial customer base. Most directly comparable European mid-sized engineering firm to Arionex.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/arionex-lt-uab

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries1 record

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 Arionex