Top five sewage treatment machine suppliers in Germany [2025]

Founded in 1985 in Berlin, AquaTech Innovations has grown from a small engineering workshop into a household name in European water treatment. What sets them apart? A relentless focus on water process equipment that balances high performance with low energy use. Walk into any major municipal treatment plant in Bavaria or Baden-Württemberg, and you’re likely to spot their signature blue-and-white machinery humming away.

Their flagship product line, the EcoFlow Series, includes everything from primary clarifiers to advanced membrane bioreactors (MBRs). But it’s their effluent treatment machine equipment that’s turning heads in 2025. The EcoFlow ET-5000, launched last year, uses AI-driven sensors to adjust treatment parameters in real time—meaning it can handle sudden spikes in wastewater flow (like after a heavy rainstorm) without sacrificing water quality. One plant in Hamburg reported a 23% reduction in operational costs after upgrading to the ET-5000, thanks to its smart energy management system.

AquaTech doesn’t just sell machines; they build partnerships. Their team of 400+ engineers offers on-site training, 24/7 technical support, and even custom retrofits for older plants. “We don’t just deliver equipment—we deliver peace of mind,” says Maria Schmidt, their head of customer relations. It’s no wonder they’ve secured contracts with 70% of Germany’s largest cities.

Based in Düsseldorf, RheinWater Systems has carved a niche in industrial sewage treatment—a sector where wastewater can be loaded with chemicals, oils, or heavy metals. Their specialty? Robust, heavy-duty systems that tackle the toughest contaminants. Think factories, refineries, and manufacturing plants—places where “one-size-fits-all” solutions fall flat.

At the heart of their lineup is the filter press equipment series, the PressMaster Pro. Unlike traditional filter presses that require constant manual adjustments, the Pro uses hydraulic pressure control and self-cleaning membranes to reduce downtime by up to 40%. A chemical plant in Ludwigshafen recently replaced three aging presses with the PressMaster Pro, and now their sludge dewatering process takes half the time it used to. “We used to have two operators monitoring the presses round the clock,” says plant manager Klaus Müller. “Now, one operator checks in twice a day. It’s been a game-changer.”

RheinWater also leads in sustainability. Their new SolarDrive filter press, launched in 2024, can run entirely on solar power for up to 6 hours a day—perfect for remote industrial sites. With Germany’s push to decarbonize industry, orders for the SolarDrive have tripled in the first half of 2025 alone.

Up in Schleswig-Holstein, Nordwasser Technik has built its reputation on serving small to mid-sized communities and rural areas. Not every town has the budget for a state-of-the-art municipal plant, but that doesn’t mean they should compromise on water quality. Nordwasser’s answer? Compact, cost-effective systems that pack big performance into small footprints.

Their bestseller, the MiniFlow Series, is designed for towns with populations under 10,000. The MiniFlow 300, for example, handles up to 300 cubic meters of wastewater per day and fits in a space smaller than a two-car garage. It includes all-in-one units: screening, aeration, sedimentation, and disinfection. “We had an old plant that took up half our town square,” says Anna Berger, mayor of a small town near Kiel. “Nordwasser replaced it with a MiniFlow, and now we’re turning that space into a park. The kids love it, and our water tests are better than ever.”

Nordwasser also excels in retrofitting. Many rural plants were built in the 1970s and 80s, and upgrading them can be tricky. Their team specializes in integrating new water process equipment into existing infrastructure, saving towns from the cost of building entirely new plants. In 2024, they completed 127 such retrofits across northern Germany.

Headquartered in Munich, BWS is the new kid on the block, but they’re making waves fast. Founded in 2010 by a group of former Siemens engineers, they’ve focused on “next-gen” technologies that merge water treatment with resource recovery. In other words, their machines don’t just clean water—they turn waste into valuable byproducts.

Take their BioCycle system, for instance. It uses anaerobic digestion to break down organic matter in wastewater, producing biogas that can be used to power the plant itself. The leftover biosolids are then processed into fertilizer pellets, which local farms can buy. A plant in Augsburg using BioCycle now generates 40% of its electricity needs from biogas and sells 500 tons of fertilizer annually. “We’re not just treating sewage—we’re creating a circular economy,” says BWS CEO Thomas Weber.

BWS also leads in effluent treatment machine equipment for the food and beverage industry. Breweries, dairies, and wineries produce wastewater rich in sugars and starches, which can be tricky to treat. Their FoodFlow Series uses specialized bacteria strains to digest these organics, reducing sludge production by up to 50%. A major brewery in Munich reported saving €120,000 a year in disposal costs after switching to FoodFlow.

Berlin Water Tech is all about urban resilience. As cities grow, so does their wastewater load, and BWT’s systems are built to scale. Their ModuFlex Series is modular—meaning cities can start small and add units as they expand. It’s like building with Lego blocks, but for sewage treatment.

The ModuFlex 5000, for example, starts with a base unit handling 5,000 cubic meters per day. Need more capacity? Add a second unit, and it jumps to 10,000. No need to shut down the plant during expansion—units can be added while the existing system keeps running. Berlin’s own treatment plant, one of Europe’s largest, uses 12 ModuFlex units and can scale up to 15 without disrupting service.

BWT also prioritizes digitalization. Their SmartPlant software connects to all their machines, giving operators real-time data on energy use, chemical levels, and water quality. It even sends alerts to technicians’ phones if something needs attention. “Last winter, a sensor detected a clog in one of our filters at 2 a.m.,” says a plant operator in Berlin. “I got a text, fixed it before my morning coffee, and no one even noticed. That’s the power of SmartPlant.”