CLEANWATER is a research project working with solutions to remove micro-pollutants and micro-plastics from wastewater.

CLEANWATER has special focus on reducing the input of micropollutants and microplastic into the Baltic Sea by exploring, developing and comparing new eco‐technological approaches.

Project goals:

  • Develop eco‐technological solutions for removing micropollutants and microplastic from contaminated water
  • Determine the dominant source, wastewater or stormwater, for various micropollutants and microplastics
  • Develop testing methods for analysis of xenobiotics and microplastics in storm‐, leachate‐ and wastewater

LiqTech has developed a membrane bioreactor (MBR) wastewater treatment system with flat sheet membranes with the purpose of removing micro-pollutants, micro-plastics and xenobiotics.

Read more about CLEANWATER.

MBR Filtration Pilot LiqTech Container


LiqTech is part of the H2020 NEXTPOWER project together with other highly competent companies in order to make innovative materials to boost the performance of atmospheric air-based concentrated solar power (CSP) systems to make them commercially viable.

Especially, LiqTech is part of developing new mechanically tough and highly thermally conductive SiC ceramic receivers, working under extreme thermal cycling without failure at a maximum materials temperature of at least 800°C and delivering over 20 years of continued operations.

Objectives of H2020 NEXTOWER project:

  • High temperature receivers (durability & emissivity)
  • Thermal fatigue and thermal shock (especially in joints)
  • Thermal storage by liquid metals, e.g. lead-based systems (corrosion issues, efficiency and max working temperature)Thermal fatigue and thermal shock (especially in joints)

Read more about NEXTOWER.

Development of Particle Filters for Euro V Engines in Heavy Vehicles

Story & Objective

LiqTech International A/S has for several years been working on the development of particle filters for engines in heavy vehicles. Optimizing filters to meet the latest Euro VI emission standards for heavy vehicles is a major challenge. Euro VI has introduced requirements for the number of particles to be discharged – not only the discharged particulate mass. LiqTech wants to solve this challenge together with Technological Institute and Purefi A/S. Optimization of the older Euro IV- and V-engines resulted in a significant reduction in the particle mass compared to previous Euro norms. However, it was primarily the amount of the larger visible particles that were reduced while the number of ultrafine particles remained almost at the same level.

The objectives of the project are to develop and optimize the properties of LiqTech’s silicon carbide (SiC) particle filters in order to effectively reduce the number of ultrafine particles discharged. The development is targeted installation on new Euro V engines in order to comply with the latest Euro VI emission standards.

Project & Results

The project must work to find an optimal relationship between the size of the filters, filtration capacity and the drop of pressure. The development work will be focused on optimizing the porosity of the filters combined with a lower cell density. Practical implementation of filters on Euro V-vehicles will take place just as extensive measurements will be carried out continuously throughout the project.

Development Of Particle Filters For Euro V Engines In Heavy Vehicles LiqTech


PARTIAL-PGMs is the development of novel, high performance hybrid twc/gpf automotive after treatment systems with focus on examining how new nanomaterials can be used to effectively substitute PGMs in current applications.

The project is funded by European Union’s Horizon 2020 research and innovation programme.

Targets for the project:

– Development of efficient hybrid TWC/GPF capable to meet future EC legislation (EU VII)
– Reduction of PGMs at least 35%.
– Decrease of REEs at about 20%

Read more about PARTIAL PGM-S.


AQUAlity is a large consortium of 7 universities, 3 research institutes and 8 companies aiming to generate and promote highly skilled scientists in the field of the removal of pollutants present in very small amount in aqueous systems.

All the participants are involved in scientific and educational tasks (chemical analysis, environmental fate, photocatalysis, material science, membrane technology and water management), where LiqTech has special focus on membrane technology and water treatment technology.

AQUAlity is funded from the European Union’s Horizon 2020 research and innovation programme.

Read more about AQUAlity.

AQUAlity Esra Eray LiqTech International

Project VARGA

Project VARGA (Water Resource Recovery Facility) is an export window for demonstrating Danish expertise in the field of environmental technologies in the wastewater sector.

The main goal for the project is to transform conventional wastewater treatment plant into a recycling plant (Water Resource Recovery Facility).

Purpose of VARGA:

  • To develop essential parts of the circular economy for energy production and utilization of nutrients in urban waste and wastewater for the production of food
  • To develop a concept for upgrading a conventional wastewater treatment plant to the future Water Resource Recovery Facility (WRRF)
  • To demonstrate this at Avedøre Wastewater Treatment Plant (WWTP) with a capacity of 400,000 PE, which will be a showcase for Danish environmental technology in international size
  • To demonstrate synergies in co-operation on resource utilization across the water and waste sectors

Read more about project VARGA.

AMASING: Ceramic, high-flux microfiltration membrane

The objectives of the project is further development of the LiqTech SiC membrane. Together with our partner Technical University of Denmark, ceramic engineering and science, the aim of the project is to remove roughness and macropores in the membrane layer by optimizing dispersion and stabilization of SiC powder in the aqueous suspensions.

Furthermore, it aims at understanding the relation between the surface chemistry of the SiC powders and the membrane, and the relation between the surface chemistry of the membrane and its microporosity, filtration efficiency (cut-off) and tendency to foul.

For the testing of the membrane, LiqTech is collaborating with a Chinese partner working in the biopharmaceutical industry.

Amasing Project LiqTech

LiqTech produces advance ceramic membranes made of silicon carbide (SiC).
AMASING aims to make tighter membrane which would improve the membrane performance.


By 2025, the most competitive water consuming industries are those that apply a “water-fit-for-purpose” concept, and are heading towards highly efficient use of water, e.g. closed loop solutions, supported by front-runner technology providers with the required level of food quality and safety and in accordance with environmental regulations.

LiqTech is teamed up with some of the biggest water companies and knowledge institutes in Denmark for the purpose of reducing water use in food industry.

DRIP – Danish partnership for Resource and water efficient Industrial Food Production – is a public/private partnership focused on water efficiency in the food industry, one of the largest water-consuming industries in Denmark and globally.

The partnership’s ambition is to produce more with less water. DRIP will reduce water consumption of leading Danish food producers by developing new sustainable water and production technology solutions and concepts.

The ambition is to use significantly less water of drinking water quality and increasingly use recycled water without compromising product quality and food safety. The developed technologies and solutions will be tested in pilot or full-scale under production conditions. The goal is a reduction in water consumption of 15 – 30 %.

Once the technologies are developed, the ambition is to create new export successes for the Danish technology and knowledge providers in the water area while at the same time the competitiveness of the food producers should be improved.

The partnership consists of a number of food companies and technology providers, three universities and two GTS institutes (research and technology organization).

The Danish Veterinary and Food Administration, Environmental Protection Agency and Nature Agency are associated partners. The partnership was launched March 1, 2015 under the INNO+ societal partnership framework with an investment of DKK 50m from Innovation Fund Denmark and DKK 48m from the partners.

For more information, please visit: DRIP Partnership

Drip Research And Development Project

Goal of DRIP partnership is to develop new sustainable water and production technology solutions that can reduce water consumption in industrial food production by 15-30%.


Danmarks Tekniske Universitet
Alfa Laval A/S
Ultraaqua A/S
Siemens A/S
Arla Foods amba
Carlsberg Danmark A/S
TripleNine A/S
Landbrug & Fødevarer
Teknologisk Institut
Københavns Universitet
Copenhagen Business School
Aquaporin A/S
Liqtech International A/S
Cabinplant A/S
HK Scan A/S

Duration and Budget
Budget 98m.DKK
Projects duration period is 48 months. Completed by the end for 2019.


Development of filtering technologies for microalgae and sustainable high-quality feed for fry

There is an urgent need for alternative resources to fishmeal and fish oil to produce fish feed to the aquaculture industry. The resource problem is due to a combination of the rapid growth of the aquaculture, and the fact that catches of fish for the feed industry is stagnating. The idea to use microalgae as fish feed originated from an on-going EU-project, which aims at demonstrating that algae can be grown on process water from the industry. 

FIMAFY has employed strategies to provide a clear concept for microalgae up- and downstream processing, investigated the shelf life stability of the dried biomass and finally evaluated the biomass as a fish feed ingredient. Pre-Gasified industrial process water with a high concentration of ammonia and free from toxic compounds, representing effluent from a local biogas plant was used as a low-price growth medium. In this study, an innovative downstream process was developed. The process set up include crossflow microfiltration (MF) by silicon carbide (SiC) ceramic membranes, up -concentration by bowl centrifuge and finally delicate drying of the biomass by a novel swirl(spin) flash dryer. Harvest trials have been performed on eight different microalgae species (Monodopsis subterranea, Nannochloropsis salina, Dunaliella salina, Phaeodactylum tricornutum, Chlorella vulgaris, Chlorella sorokiniana, Chlorella pyrenoidosaandDesmodesmussp).

All the species showed the same flux pattern while the performance of the harvest was highly species-depended. The recovery efficiencies were higher or equal to 98%, while no cell rupture was observed. The filtration VCR (volume concentration ratio) for microalgae harvest ranged between 10-30, depending on the species cell size, shape and other parameters. The findings have also been successfully tested in large scale forNannochloropsis salina. Energy consumption in this processing technology estimated as 28% lower than known current processing technologies which are being applied to microalgae. These findings represent the SIC-UF ceramic membrane filtration as a robust and feasible technique for downstream processing of microalgae. 


  • BioMar A/S, Denmark 
  • LiqTech International A/S 
  • IFAU, Denmark 
  • Ecolipids A/S 
  • DTU Food 
  • DTU Aqua 

LiqTech Lab Scale UF System For Algae Harvesting


– An Integrated Membrane Process for Oily Wastewater Treatment, Water Reuse and Valuable By-Products Recovery.

LiqTech is leading the EU Fp7 project O-WaR, in a consortium that consist of seven other partners including three SME´s, two knowledge institutes and two end users.

The O-WaR (Oily Wastewater Reuse) project aims to develop an integrated process able to efficiently remove highly emulsified oil from wastewater, to reuse treated wastewater, to recover valuable by- products in wastewater and to reduce volumes of oily waste for disposal.

A large amount of wastewater in the form of oil-in-water is generated in different industries such as vegetable oil, metal processing, transportation, petrochemical and oil and gas (where the oily wastewater is called “produced water”). These oily wastewaters also feature high chemical oxygen demand (COD) and high suspended solids (SS).

All the industries face the same problems: to separate emulsified oil from water in a cost-effective way and to handle large volumes of oily waste in an economical way.

Conventional approaches for treating oily wastewaters include gravity separation, skimming, dissolved air flotation, de-emulsification, coagulation and flocculation. Membrane processes are also increasingly used for treating oily wastewater.

Membrane processes exhibit undisputable advantages over the conventional approaches, especially in treatment of highly emulsified oily wastewater: little energy consumption, small footprint and most importantly, nearly complete removal of oil in wastewaters.

Integrated Membrane Process for Oily Wastewater Treatment

However, membrane processes have not been widely accepted by the industries, and the major inhibiting factor for successful commercialization of membrane processes is membrane fouling. Membrane fouling is caused by adsorption and deposit of some components in feed water on the membrane surface and/or in the membrane matrix.

Membrane fouling results in membrane flux decline over time and eventually membrane replacement (after a number of chemical cleaning cycles). Although ceramic membranes, due to their hydrophilic membrane surface, are less prone to fouling than polymeric membranes, quickly declined fluxes of ceramic membranes have also been observed in many oily wastewater treatment studies 1,2,3.

Project Discription European Comission – O-WAR

Another major problem associated with all the oily wastewater treatment technologies is the large volume of oily waste generated in the wastewater treatment. Concentrated oil, COD and solids in the waste pose huge challenges for further treatment, and direct disposal of oily waste has become a common practice for many end-users.

In membrane processes the concentrate stream typically makes 5-20% of the feed water volume and disposal costs for the concentrate can be very high in most of the European countries.

The O-WaR solution consists of
(1) a silicon carbide (SiC) ceramic membrane coated with an anti-fouling layer (AFL) made of nano-particles for oily wastewater treatment with consideration of reuse of membrane filtrate, (2) an innovated Induced Gas Flotation (IGF) technology (InwaSep) for membrane concentrate treatment for significant volume reduction and valuable by-products recovery and (3) a nanofiltration (NF) or a reverse osmosis (RO) unit for further purification of SiC permeate and/or valuable by-products recovery from certain wastewaters.


– Pelagic Industry Processing Effluents Innovative and Sustainable Solutions.

The main goal for the PIPE project is to test cutting edge technologies, to separate water and organic material from pelagic industries effluents and to characterize as well as valorise the organic material collected.

For this project LiqTech collaborated with Technical University of Denmark as well as Jiaotong top 100-rated university in engineering, Chalmers University of Technology from Sweden.

– Pelagic Industry Processing Effluents Innovative and Sustainable Solutions.

The main goal for the PIPE project is to test cutting edge technologies, to separate water and organic material from pelagic industries effluents and to characterize as well as valorise the organic material collected.

For this project LiqTech collaborated with Technical University of Denmark as well as Jiaotong top 100-rated university in engineering, Chalmers University of Technology from Sweden.

Romeo - Reactor optimisation by membrane enhanced operation

LiqTech joined Horizon2020 consortium as a partner with vast experience within the field of ceramic membranes. SiC material will be used in a new reactor concept to drastically reduce energy consumption.

The ROMEO project tackles process intensification for catalytic-driven and eco-friendly reaction systems.

Silicon Carbide Membranes For ROMEO Project

ROMEO stands for “Reactor Optimisation by Membrane Enhanced Operation”. It is a Research and Innovation project, and has received funding from the European Union’s Horizon 2020 research and innovation programme.

ROMEO focuses on a new reactor concept to drastically reduce energy consumption. It will lead to the manufacturing of bulk chemicals at considerably lower operational and investment costs.

The aim of ROMEO is to reduce energy consumption by up to 80% and emissions by up to 90% in industrial catalytic gas-phase reactions.

ROMEO’s 9 partners team up for 4 years to demonstrate the technical feasibility of this reactor concept. The project started in September 2015 with an EU budget of 6 million euros.

Read the news from the ROMEO-project

Video from the ROMEO Project


LiqTech Partners For the ROMEO Project

Partners ROMEO Project LiqTech

Read The Brochure

ROMEO Project Brochure

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