LiqTech International
LiqTech International (NASDAQ: LIQT) is a Denmark-based clean-technology company that designs and manufactures silicon carbide ceramic membrane filtration systems for commercial pools, oil and gas produced water, marine vessels, and industrial applications including phosphoric acid purification.
- Company typePublic
- Founded2000
- HeadquartersHobro, Denmark
- Headcount101–250
- GTM typeB2B
- OfferingHardware or Manufacturing
What LiqTech International does
LiqTech International, Inc. (NASDAQ: LIQT) is a clean-technology and industrial filtration company specializing in silicon carbide (SiC) ceramic membrane technology for liquid and gas purification. The company was founded in 2000, is incorporated in Nevada, and is headquartered and manufactures in Ballerup and Hobro, Denmark. Its proprietary SiC membranes are deployed across four primary application verticals: commercial swimming pools (QlariFlow branded systems for aquatic centers and leisure facilities); oil and gas produced water treatment (QureFlow and the recently launched QureFlow Max high-capacity configuration, achieving >99% removal of oil and suspended solids at 80–120 m³/h); marine water treatment for scrubber, iCER and EGR engine applications (170+ marine scrubber installations worldwide); and industrial verticals including phosphoric acid purification (PurePhos, removing silica and suspended solids from food-grade acid for major chemical producers), steel/metals wastewater, power plant filtration, and diesel particulate filters for heavy-vehicle emission retrofits (cumulative ~2.5M vehicles). The company has also entered lithium brine and lithium-iron-phosphate battery material adjacent applications.
LiqTech International firmographics
Firmographics- Name
- LiqTech International
- Legal name
- LiqTech International, Inc.
- Website
- https://liqtech.com
- Company type
- Public
- Founded year
- 2000
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- LiqTech International (NASDAQ: LIQT) is a Denmark-based clean-technology company that designs and manufactures silicon carbide ceramic membrane filtration systems for commercial pools, oil and gas produced water, marine vessels, and industrial applications including phosphoric acid purification.
- Ownership category
- akta.pro rank
LiqTech International industry classification
Industry- Product category
- Industrial Water Filtration Systems
- SIC
- Miscellaneous Chemical Products (2890)
- akta.pro primary industry
- Separation & Filtration Equipment (Filters, Centrifuges, Membranes) (IMAHAEAB)
- akta.pro secondary industries
- Membranes, Consumables & Chemicals (Elements, Antiscalants, Cleaning) (EUANAFAJ), Electronic-Grade Solvents, Filtration & Purification (UHP Solvents/Filters/Resins) (HDAHAGAO)
Keywords
Where LiqTech International is headquartered
LocationHeadquarters
- HQ city
- Hobro
- HQ country
- Denmark
- HQ region
- Europe
Offices6 records
Markets served
LiqTech International business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Water Treatment Systems: Sale of filtration systems including commercial pool systems (QlariFlow), marine water treatment, produced water treatment (QureFlow), and industrial wastewater systems. One-time capital equipment sales with recurring aftermarket component and service revenue.
- Aftermarket Components and Service: Recurring revenue from replacement filters, membranes, and after-sales service. Systems and aftermarket revenue grew 49% in 2025.
- Diesel Particulate Filters (DPF): Filters and components for diesel exhaust emission control in large vehicles. Retrofit applications for emission reduction.
- Ceramic Membranes (OEM and Standalone): Sale of component membranes and membrane systems for industrial, municipal, pharmaceutical, and beverage applications. Includes standalone filter press systems for industrial applications.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Custom system pricing based on application requirements |
Go-to-market motion3 records
Distribution channels12 records
Marketing channels6 records
LiqTech International product offering
Product offeringCore offering
LiqTech International manufactures and supplies proprietary silicon carbide (SiC) ceramic membrane filtration systems and diesel particulate filters (DPF). Its products are deployed across oil and gas produced water treatment, marine scrubber and next-generation iCER/EGR water treatment systems, phosphoric acid purification, industrial wastewater treatment, and commercial pool and spa filtration. The company operates in-house ceramic membrane manufacturing capabilities using proprietary furnaces and sells both complete systems and standalone SiC membrane components to OEM customers.
Product overview
LiqTech International is a clean technology company offering specialized filtration products and systems for liquid and gas purification based on proprietary silicon carbide (SiC) ceramic membrane technology. The company's product portfolio centers on its core SiC membrane technology, which is deployed across multiple application-specific systems. The main product lines include: QlariFlow™ for commercial pool and spa filtration; QureFlow™ and QureFlow™ Max for oil & gas produced water treatment; PurePhos™ for phosphoric acid purification; Marine Scrubber Water Treatment and Marine Water Treatment Systems (iCER/EGR) for vessel emissions compliance; and Diesel Particulate Filters (DPF) for emission control. LiqTech also offers PureFlow™ mobile units and the Aqua Solution® membrane as specialized offerings. The products share a common technological foundation in silicon carbide ceramic membranes but are differentiated by application, capacity, and modular system design for specific end markets including swimming pools, marine, oil & gas, industrial wastewater, and phosphoric acid industries.
Differentiator
Problem solved
Functional benefit
Brands
- QlariFlow: Ceramic membrane filtration systems for commercial pool applications
- QureFlow
- QureFlow Max
- PurePhos
- Aqua Solution
- PureFlow
- LiQTech
Products and services
- QlariFlow™
- QureFlow™
- QureFlow™ Max
- PureFlow™
- PurePhos™
- Marine Scrubber Water Treatment Systems
- Marine Water Treatment Systems (iCER/EGR)
- Diesel Particulate Filters (DPF)
- SiC Ceramic Membranes Proprietary silicon carbide ceramic membranes sold as standalone components to OEM customers and integrated into LiqTech's own filtration systems. Used in liquid and gas purification applications requiring chemical, thermal, and mechanical durability.
- Industrial Wastewater Treatment Silicon carbide ceramic membrane-based systems for industrial wastewater treatment and reuse, including applications such as steel wastewater. Designed for industrial facilities seeking water recycling and discharge compliance.
- Water For Energy Silicon carbide ceramic membrane filtration systems for power generation and energy applications, including cooling water and process water treatment. Targets power plants and energy sector operators.
Quantifiable outcome
- 99%+ oil and suspended solids removal rate with QureFlow Max systems
- +6 more outcomes
Companies that use LiqTech International
Customer profileNamed customers9 records
Segments7 records
Ideal customer profiles4 records
LiqTech International technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
LiqTech International partnerships and signals
Strategic signalPartnerships
13 partnerships are on record, tiered core, key and regional.
- Waterco LimitedcoreDistribution partnership across Australia and Pacific Islands for swimming pool water filtration systems. Secured record 10-system order for Plumpton Aquatic and Leisure Centre. Partnership drives commercial pool expansion in the region.
- LoteckeyStrategic partnership with commercial pool engineering specialist for Northern Europe market. Framework established for future joint municipal and large commercial pool developments. Secured largest commercial pool project to date in Den Helder, Netherlands.
- NAF Aquatics / Treatment Specialties - North American FiltrationcoreDistribution and partnership agreement for U.S. commercial swimming pool market. Secured first U.S. pool order for three systems at Weston County School District #1 Aquatic Center in Wyoming.
- Jitri (JiTRI) - Joint VenturecoreJoint venture in China for marine water treatment market. Broke ground on marine-focused R&D test center and localization facility. Completed regional spare parts warehouse.
- China Haisum Engineering Co. Ltd.regionalMoU for industrial water treatment applications in China.
- Razorback DirectregionalDistribution agreement for commercialization of produced water treatment solution in the U.S. Received first U.S.-based oil & gas produced water order.
- Danbee Marine Co. Ltd.regionalAgreement for marine scrubber water treatment solutions for the South Korean market.
- FranmanregionalAgreement for marine scrubber water treatment solutions for the Greek market.
- Dan Marine GroupregionalAgreement to expand marine water treatment solutions to the Chinese market.
- NESR (National Energy Services Reunited)keyDistribution agreement for produced water treatment solution for re-injection in Middle East. Delivered pilot unit for Middle East operations.
- Silicon FilterregionalDistribution agreement in China for phosphoric acid purification applications.
- LiquinexregionalDistribution agreement in Singapore for water treatment solutions.
- Ecolotron Wastewater SolutionsregionalCooperation agreement on combined solution for phosphoric acid purification.
Scale indicators18 records
Recent moves10 records
Expansion highlights6 records
LiqTech International competitors and assessment
Company assessmentDirect peers
- Pall Corporation (Cytiva): Pall's Membralox product line is the most direct competitor in ceramic crossflow membrane filtration, serving oil & gas, food & beverage, pharma and industrial markets with similar SiC and alumina-based membranes. This is the closest analog to LiqTech's core SiC membrane technology.
- Porvair Filtration Group: Porvair manufactures sintered metal and ceramic filtration media and housings for oil & gas produced water, aerospace, and industrial process filtration. Its proprietary sintered media represents a competing materials-based filtration approach for the same harsh-environment separation challenges LiqTech targets.
Broad incumbents
- Donaldson Company: Donaldson is a global filtration incumbent producing air, liquid, and exhaust filtration (including DPF aftertreatment) for industrial, engine OEM, and OEM replacement channels. It overlaps with LiqTech's DPF business and industrial liquid filtration, with far broader portfolio and channel reach.
- Metso Corporation: Metso supplies separation, classification, and water management equipment to mining, metals, and industrial customers including ceramic and polymer filtration systems. Comparable to LiqTech's industrial water and oil & gas produced water treatment applications.
- Xylem Inc. Xylem is a global water technology major producing a broad range of filtration, pump, and treatment solutions for municipal and industrial water. It is a broader incumbent in the same end markets LiqTech targets with QureFlow and industrial wastewater systems.
- Pentair plc: Pentair manufactures water treatment and filtration products for pools, residential, and commercial water applications. The commercial pool business overlaps directly with LiqTech's QlariFlow franchise, but Pentair operates at vastly larger scale across broader product lines.
- Veolia Water Technologies (Veolia Environnement): Veolia supplies municipal, industrial, and oil & gas water treatment systems globally, frequently as EPC contractor. Competes with LiqTech on large produced water and industrial wastewater projects where Veolia's scale and execution depth are structurally favored.
- 3M Separation and Purification Sciences: 3M supplies a broad portfolio of industrial liquid and gas filtration media and equipment through OEM and after-market channels. A broad incumbent in industrial filtration with overlap to LiqTech's component and system offerings across industrial applications.
Emerging players
- Aquaporin A/S: Danish biomimetic membrane specialist commercializing hollow-fiber forward osmosis and reverse osmosis membranes for water reuse, food, and life-science applications. Different membrane chemistry, but shares Danish origin, water-technology focus, and small-cap public-company profile with LiqTech.
- CoorsTek Membrane Sciences: CoorsTek produces advanced ceramic components including ceramic membranes and substrates for chemical processing and filtration. A partial-overlap emerging player whose ceramic materials expertise intersects with LiqTech's SiC-based membrane innovation.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
LiqTech International social profiles
Digital presenceLiqTech International compliance and trust
Trust signalCompliance1 record
LiqTech International financial estimates
Financial estimateRevenue estimate
Valuation estimate
LiqTech International leadership team
Management profileNumber of profiles
Profiles6 records
LiqTech International subsidiaries and ownership
Company hierarchySubsidiaries4 records
LiqTech International funding detail
Funding detailFunding overview
Funding rounds3 records
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
LiqTech International M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about LiqTech International
What does LiqTech International do?
LiqTech International manufactures and supplies proprietary silicon carbide (SiC) ceramic membrane filtration systems and diesel particulate filters (DPF). Its products are deployed across oil and gas produced water treatment, marine scrubber and next-generation iCER/EGR water treatment systems, phosphoric acid purification, industrial wastewater treatment, and commercial pool and spa filtration. The company operates in-house ceramic membrane manufacturing capabilities using proprietary furnaces and sells both complete systems and standalone SiC membrane components to OEM customers.
Is LiqTech International a public or private company?
LiqTech International is a public company. It is classified as public and is currently operating.
When was LiqTech International founded?
LiqTech International was founded in 2000. It employs 101 to 250 people.
Where is LiqTech International based?
LiqTech International is headquartered in Hobro, Denmark, in the Europe region.
How does LiqTech International make money?
Four revenue lines are on record. Water Treatment Systems are the primary driver. The others are aftermarket Components and Service, diesel Particulate Filters (DPF) and ceramic Membranes (OEM and Standalone).
Who are LiqTech International's main competitors?
Direct peers on record are Pall Corporation (Cytiva) and Porvair Filtration Group. Broad incumbents are Donaldson Company, Metso Corporation, Xylem Inc., Pentair plc, Veolia Water Technologies (Veolia Environnement) and 3M Separation and Purification Sciences. Emerging players are Aquaporin A/S and CoorsTek Membrane Sciences.
Does LiqTech International have an API?
No public API is recorded for LiqTech International.
What industry is LiqTech International in?
LiqTech International's product category is Industrial Water Filtration Systems. Its primary akta.pro industry code is IMAHAEAB, Separation & Filtration Equipment (Filters, Centrifuges, Membranes), with a secondary code of EUANAFAJ, Membranes, Consumables & Chemicals (Elements, Antiscalants, Cleaning). Its SIC code is 2890.