About Water Maid

Water Maid offers a complete range of the most efficient and sustainable industrial multimedia filtration systems and solutions for pre- and post-treatment of feed and process water. Water Maid is the best choice of effective industrial water filtration.

Wide range of water filtration for industrial applications

Filtration systems are an essential part of most industrial water treatment applications, from pre-treatment of source or process water to a polishing post-treatment as the final step downstream. Mellifiq’s wide range of filtration vessels, in combination with a large variety of media and features, such as automation, covers requirement for most industrial applications.

Increased quality awareness, hand in hand with the presence of more complex pollutants, creates the need of more advanced water treatment solutions. Well configured filtrations systems, combined with other technologies, help improve the treatment processes in reaching the desired water qualities. Water Maid filtration systems meet the highest requirements and can be implemented in multiple configurations.


Wastewater treatment

Wastewater treatment plants treat more complex effluent discharge from the growing production industry than ever before. Various water filtration applications are hence a natural step in many phases of the treatment process such as particle removal from intake water, dichlorination, BOD or COD reduction and polishing of micropollutants to mention a few. Typical applications of wastewater treatment are:

  • Wastewater treatment plants
  • Industrial process water treatment
  • Car wash effluent discharge water treatment
  • Chemical production process and discharge water treatment

Water reuse

With an ever-increasing cost of access to fresh water and discharge of effluent, water reuse or recycling is becoming a more attractive alternative for many industrial operations. It saves huge costs and lowers the company’s environmental impact. When treating recycled water, filtration is an important step both as a pre-treatment measure and as a polishing step at the end of the treatment process. Typical applications for recycling water are:

  • Hydroponic water treatment
  • Aquafarming water treatment
  • Cooling water treatment
  • Industrial process water treatment


The most common method, to disinfect and preserve public water supply biologicaly safe, is to routinely treat water with chlorine in large scale. Chlorine is a powerful germicide, killing many disease-causing microorganisms in water and eliminates bacteria, molds and algae that may grow in water supply systems. The use of chlorine have helped eliminates diseases like cholera, typhoid fever, and dysentery.

Chlorine is also corrosive, which can effect the water work and equipment and has a distinctive, characteristic taste and odour, which can increase from reactions to organic matter. Chlorine concentrations greater than 0.3 ppm in water can be tasted and ​can lead to formation of disinfection by-products (DBP) such as the trihalomethanes (THMs), haloacetic acids. In addition to toxicity of THMs in drinking water, they can give a taste in beer or soft drinks in the brewing and bottling industry.

Chlorine and its active oxidative chlorine compound can chemically be reduced by filtration with activated carbon. Activated carbon is also very effective in removing free chlorine from water. The removal mechanism employed by activated carbon for dechlorination is not the adsorption process that occur for organic compound removal. Dechlorination is a result of a chemical reaction of the activated carbon’s surface being oxidized by chlorine.

Chlorine is toxic to both humans and many aquatic species, residual chlorine must be removed from disinfected wastewater before disposal into the environment.


Odor, color, and taste removal

In many industrial and public utility treatment processes undesired odor, color, and taste need to be remove from water before use. Often these sorts of contamination appear in water due to presence of dissolved gases such as hydrogen sulfide, microbial content, organic matters and or contamination from industrial waste containing excessive chlorine and phenol. Activated carbon or catalytically coated sand water filtration is commonly used technologies to remove these undesired elements from water. Thanks to adsoption capabilities of carbon, gaseous and fine organic matter are molecularly entrapped. A combination of ozone oxidation first followed by activated carbon filtration gives near 99,90% odor, color, and taste removal rate. Typical applications for removal of odor, color, and taste are in industries such as:

  • Food and beverage production process water treatment
  • Bottling plants source and process water treatment
  • Swimming pools water treatment
  • Pharmaceutical process water treatment

Removal of iron and manganese

Iron and manganese are troublesome chemicals in water supplies. These metallic elements are found in rocks around the world and consequently occur in a variety of concentrations in groundwater. Industrial effluent, sewage and landfill leachate contribute to increasing these concentrations.

To avoid problems such as discoloration, deposition on equipment and in water distribution systems and foul taste, removal of these elements is a necessary step in the source or wastewater treatment process.

Combining different technologies, such as pre-oxidation, for example by inserting oxygen or ozone followed by industrial filtration technology, where different filtration media such as greensand, can be applied, or sedimentation is one of the most efficient ways to completely remove iron and manganese from water.


Removal of Active Pharmaceutical Ingredient

Ever since the second half of the 19th century, when pharmaceutical production underwent an industrial transformation, our consumption and dependence on synthetic medicines has increased avalanche-like. Pharmaceuticals now play a vital role in human and animal health and longevity.

In recent years, it’s become more and more apparent that traditional water treatment processes and technologies cannot remove these hard to degrade active pharmaceutical ingredients (APIs), on a massive scale, from industrial or municipal wastewater. APIs is hence transported to recipients waters where they accumulate in rivers and lakes like never before with the implications that impact not only our drinking water but the entire global aquatic ecosystems.

As one of the few experts in the world, Mellifiq have successfully helped many players, both in the pharmaceutical industry and municipalities with 99,90% reduction of API by using a combination of industrial filtration and advanced oxidation process. Filtration is used as a pre-treatment before and as a polishing step after the oxidation process.



PFAS is a group of highly recalcitrant artificial compounds. First produced decades ago, PFAS compounds can still be found at trace amounts in life supporting drinking water sources across the globe.

Few methods exist today to separate PFAS in wastewater and drinking water plants and the concentrations, normally associated with groundwater near airports or other industrial production plants, may exceed toxic thresholds. Water Maid filtration systems can effectively adsorb PFAS/PFOS and may be degraded together with AOP using Ozonetech and Saniray systems.