Efficient solutions against odors and foreign water

Whether it's a sewer system, sewage treatment plant or industrial exhaust air: We offer tailor-made solutions that eliminate odors sustainably and make your environment more livable.

Holistic system solutions

against odour and foreign water problems.

Sustainable and innovative solutions against odors

Tailored, environmentally friendly systems to reduce odors and improve the quality of life for municipalities and industry.

Optimized activated carbon solutions

COALSI combines physical, chemical & biological filter technology with foreign water retention and corrosion-free manhole covers.

Individual advice and expertise for your projects

With expert knowledge, we develop tailor-made solutions for your road, sewer and exhaust air projects.

COALSI in action

Compact, powerful and environmentally friendly

Odors have a major impact on the quality of life and work. We are at your side and provide you with advice on sustainable and efficient solutions against odors and foreign water.

COALSI's unique filter technology combines physical, chemical and biological processes to achieve environmentally friendly results.

  • COALSI reduces odors with activated carbon on filter mats that prevent soaking.
  • COALSI Aquastop stops foreign water in the sewer and relieves sewage treatment plants.
  • COALSI odour filters with ventilation prevent corrosion caused by hydrogen sulphide.
  • COALSI large filters: active or passive, ideal against heavy industrial odors.

Our solution categories

Sewer odour problems

Exhaust air odour problems

Extraneous Water

Manhole cover

Our products

Street Sewer Filters

Stops odors from escaping from sewers without closing the channel. This prevents corrosion - the channel can breathe.

Street Drain Filters

Filters odorous gases from the side drain - integrated in the leaf trap so that dirt is not flushed into the sewer.

Aquastop

Prevents foreign water from entering the sewer network too quickly and uncontrollably and relieves the load on the sewage treatment plant — also available with integrated ventilation.

Multi-chamber filters

Effective remedy for increased odour pollution from exhaust systems - available as pipe end and intermediate pipe filters.

Volumenmax

Powerful power pack for particularly heavy odors with active ventilation.

Block filter systems

Powerful power pack for particularly heavy odors as a passive, currentless solution.

Polylok

Pipe end filters with normal odors, for example from roof filters.

FlexiGrid

Modular and corrosion-free PP-HD manhole cover.

That's what our customers say

Hotel Baumann, Otterfing

“In the past, when the weather changed, we often had problems with unpleasant smells coming from the canal, especially near our beer garden. Since the COALSI road sewer filter was installed, the problem has completely disappeared. The installation was completed in just a few minutes and the effect was immediate. The long-lasting filter solution now provides permanent fresh air — a worthwhile investment for the well-being of our guests!”

Stadtwerke Landstuhl sewage treatment

“Our sewage treatment plant has a waste water supply of 125,000 m³ per month, which is why a spacious layout with far-sightedness and a generous filter area were decisive for us. Volumenmax impressed us due to its large filter capacity. The complex completely met our expectations. Volumenmax runs discreetly and correctly, which contributes to our complete satisfaction. I therefore fully recommend COALSI filter technology.”

City of Hockenheim, Civil Engineering

“The amount of dirt in municipal and commercial wastewater led to unpleasant fumes from the sewage system during the warm months. We had to act! For necessary reasons, but also for testing, we had already purchased several filters four years earlier. We have had good experiences with this. Among other things, because of the good filter effect, we used COALSI again for the current demand of around 60 applications.”

Emder Abwasser Technik

“COALSI made it possible to easily adapt the construction of the exhaust air system, which has so far proven effective thanks to the filter technology used.”

Hamburger Stadtentwässerung

“We opted for a COALSI multi-chamber filter, which was easy to integrate into the system thanks to its compact design and unobtrusive shape. The hybrid filter mat technology ensures reliable odour removal and easy maintenance with quick filter changes. So far, the filter has proven its effectiveness flawlessly.”

Contact us

Would you like individual advice on one of our products or a holistic solution to your problem? Please feel free to contact us, we are here for you.