Top 10 Sewage Treatment Machine Suppliers in Europe in 2025

When it comes to precision engineering and reliability, German companies often set the bar—and EcoTech Solutions GmbH is no exception. Founded in 1998 in Munich, this family-owned business has grown from a small workshop to a European leader in industrial wastewater treatment, serving clients in automotive, chemical, and food processing industries. What truly makes EcoTech stand out is their obsession with customization. Unlike one-size-fits-all solutions, they work closely with each client to design systems that tackle their specific wastewater challenges, whether it’s heavy metal removal, oil-water separation, or high-strength organic waste. At the heart of their technology lineup is their advanced water process equipment, which combines mechanical filtration with biological treatment to achieve up to 99.7% pollutant removal rates. Take their flagship “EcoFilter Pro” series, for example—a modular system that integrates sand filtration, activated carbon adsorption, and membrane technology. One client, a major automotive plant in Stuttgart, reported a 40% reduction in water usage after installing the EcoFilter Pro, thanks to its ability to recycle up to 85% of treated water back into production. But EcoTech doesn’t just stop at equipment. They pride themselves on long-term partnerships, offering 24/7 technical support and regular maintenance check-ins. “We don’t just sell machines—we build relationships,” says CEO Maria Schmidt. “Our clients know we’re with them every step of the way, from installation to upgrades.” It’s this customer-centric approach, paired with their commitment to innovation (they invest 15% of annual revenue into R&D), that has earned them a 96% client retention rate and a spot as a trusted partner for some of Europe’s biggest industrial names.

If there’s one company that knows how to balance efficiency with environmental responsibility, it’s Aquatech Systems France. Based in Lyon, this dynamic firm has been a pioneer in both municipal and industrial sewage treatment since 2005, with a focus on technologies that minimize energy use and maximize resource recovery. Their claim to fame? The “AquaMembrane X” series—membrane bioreactors (MBRs) that deliver crystal-clear treated water while using 30% less energy than traditional systems. What’s impressive about Aquatech is their versatility. They’ve designed compact MBR units for small towns with populations under 5,000 and sprawling treatment plants for cities like Marseille, where their system processes over 50,000 cubic meters of sewage daily. But it’s their filter press equipment that has become a game-changer for industries dealing with sludge. The “PressMaster 5000” uses hydraulic pressure to dewater sludge to a solid content of 35-40%, reducing disposal costs by up to 50% for clients in the food and beverage sector. Beyond the numbers, Aquatech has a knack for making complex technology accessible. Their user-friendly control panels and remote monitoring app allow operators to adjust settings, track performance, and troubleshoot issues from anywhere—even a smartphone. “We believe sustainability shouldn’t be complicated,” explains lead engineer Pierre Dubois. “Our systems are designed so that even small teams with limited training can run them efficiently.” It’s this focus on usability, paired with their commitment to innovation, that has made Aquatech a go-to supplier for both public utilities and private companies across France and beyond.

In a market flooded with traditional treatment methods, EuroWater Innovations UK is shaking things up with their bold approach to sustainability. Founded in 2010 in Manchester, this forward-thinking company has made a name for itself by reimagining sewage treatment as a resource recovery opportunity, not just a waste management problem. Their dry process equipment, in particular, has turned heads in the industry. Unlike wet treatment systems that require large amounts of water, EuroWater’s dry process uses heat and mechanical separation to break down waste, producing nutrient-rich fertilizer pellets and biogas as byproducts. Take their “DryCycle 3000” system, which is installed at a brewery in Edinburgh. The brewery’s wastewater, high in sugars and yeast, is processed through the DryCycle, which removes 98% of solids and converts them into biogas—enough to power the brewery’s boilers for 8 hours a day. The remaining liquid is treated and reused for cleaning, slashing the brewery’s water bill by £25,000 annually. “We see wastewater as a goldmine,” says founder Emma Clarke. “Every ｄｒｏｐ contains energy and nutrients that can be recycled, and our technology unlocks that potential.” But EuroWater doesn’t stop at dry processes. They’re also leaders in energy recovery, with systems that capture heat from treatment processes to warm buildings or preheat incoming wastewater, reducing energy costs by up to 35%. Their commitment to circular economy principles has earned them partnerships with the UK government’s Environment Agency and major retailers like Tesco, who use EuroWater systems at their distribution centers to treat and reuse rainwater and graywater. With a mission to “turn waste into wealth,” EuroWater is proving that sustainability and profitability can go hand in hand.

When it comes to water reclamation, few companies can match the expertise of Netherlands WaterTech BV. Based in Rotterdam, a city famously below sea level, this company has spent the last 25 years perfecting the art of turning wastewater into a valuable resource. Their specialty? Wet process equipment that excels at treating high-strength industrial wastewater and reclaiming it for reuse, whether in agriculture, manufacturing, or even drinking water (after additional purification). One of their most innovative solutions is the “AquaReclaim 4000,” a wet process system that uses a combination of anaerobic digestion, nitrification, and denitrification to remove nitrogen and phosphorus—two nutrients that cause harmful algal blooms in waterways. Installed at a dairy farm in Friesland, the AquaReclaim 4000 treats 200,000 liters of milk processing wastewater daily, producing water so clean it’s used to irrigate the farm’s pastures and wash milking equipment. “In the Netherlands, water is our most precious resource, so we can’t afford to waste a ｄｒｏｐ,” says technical director Jan van der Meer. “Our systems are designed to close the loop, ensuring every liter of wastewater gets a second life.” What also sets Netherlands WaterTech apart is their focus on resilience. Living in a low-lying country prone to flooding, they’ve engineered their systems to withstand extreme weather, with features like elevated control panels, waterproof electrical components, and backup generators. This attention to detail has made them a trusted partner in coastal communities across Europe, from Belgium to Denmark. As van der Meer puts it: “We don’t just build treatment systems—we build peace of mind.”

Italy is known for its compact, stylish design—think Fiat 500s and espresso machines—and Italiano Sistemi Idrici SpA (ISI) brings that same ethos to sewage treatment. Founded in Milan in 2001, ISI specializes in compact treatment units that deliver big results in small spaces, making them ideal for historic city centers, remote villages, and industrial facilities with limited room. Their “MiniTreat” series, for example, is a self-contained system that fits in a shipping container yet can treat up to 500 cubic meters of wastewater per day—perfect for a small town or a mid-sized factory. But don’t let their size fool you: these units are packed with advanced technology. The MiniTreat uses a combination of biological treatment and ultrafiltration to achieve EU discharge standards, and it’s fully automated, requiring minimal human intervention. One client, a winery in Tuscany, installed a MiniTreat unit in their courtyard, where it blends in with the surrounding olive trees while treating wastewater from grape pressing. “We wanted something that worked as hard as it looked good,” says the winery’s owner, Marco Rossi. “The ISI system does both—our wastewater is cleaner than ever, and guests never even notice it’s there.” ISI also leads the way in mobile treatment solutions. Their “MobileTreat” trucks can be deployed to construction sites, music festivals, or disaster zones, providing temporary sewage treatment in areas where infrastructure is lacking. During the 2023 floods in Emilia-Romagna, ISI deployed 12 MobileTreat units to affected villages, ensuring clean water access while permanent systems were repaired. “In Italy, we know how important it is to adapt to changing needs,” says CEO Laura Bianchi. “Our compact, mobile systems let us bring treatment where it’s needed most, when it’s needed most.”

Treating sewage in sub-zero temperatures is no easy feat—but Scandinavian Eco Solutions AB (SES) has turned it into an art form. Based in Stockholm, this innovative company has spent over 20 years developing treatment systems that thrive in cold climates, where traditional biological processes often struggle due to slow microbial activity. Their secret? A combination of insulated reactors, low-temperature bacteria strains, and heat recovery technology that keeps treatment processes running efficiently even when temperatures ｄｒｏｐ to -20°C. Their flagship “ArcticTreat” system is a hit across Scandinavia, Russia, and Canada. Unlike conventional systems that require expensive heating, the ArcticTreat uses heat generated by the treatment process itself, capturing warmth from microbial digestion and recycling it to maintain optimal reactor temperatures. A municipal client in Tromsø, Norway, reports that their ArcticTreat system operates year-round with no additional heating, reducing energy costs by 65% compared to their old setup. “Cold climates shouldn’t mean compromising on treatment quality,” says SES founder Erik Larsson. “We’ve proven that with the right technology, you can achieve excellent results without burning fossil fuels.” SES also prioritizes sustainability in their own operations. Their factory in Uppsala runs on 100% renewable energy, and they use recycled steel and aluminum in 80% of their equipment. Even their packaging is plastic-free, using biodegradable materials sourced from local forests. “We believe in walking the walk,” Larsson adds. “If we’re asking clients to invest in sustainability, we need to lead by example.” It’s this holistic approach to green technology that has made SES a trusted name in cold-climate wastewater treatment—and a role model for environmentally responsible manufacturing.

In a country where agriculture and tourism are economic lifelines, Spanish WaterWorks SL (SWW) has carved out a niche by focusing on two critical sectors: agricultural wastewater and coastal resort sewage treatment. Founded in Barcelona in 2003, this energetic company understands the unique challenges of treating wastewater with high levels of organic matter (from farms) or seasonal fluctuations (from tourist hotspots), and they’ve developed solutions that rise to both occasions. For agriculture, their “AgriTreat” system is a game-changer. Designed to handle manure, crop washing water, and pesticide runoff, AgriTreat uses a combination of anaerobic digestion and constructed wetlands to break down organic matter and remove contaminants. A strawberry farm in Huelva, for example, saw a 50% reduction in fertilizer costs after installing AgriTreat, as the system produces nutrient-rich biosolids that can be spread back on fields. “Farmers work hard enough without worrying about wastewater,” says SWW’s agricultural specialist, Carlos Mendez. “AgriTreat turns a problem into a resource, helping them save money while protecting the environment.” For coastal resorts, SWW’s “SeasonalFlow” systems are equally impressive. These modular units can scale up during peak tourist season (doubling capacity in just 24 hours) and scale down in the off-season, reducing energy use by up to 40%. A major resort in the Balearic Islands reports that SeasonalFlow has not only cut their wastewater costs but also improved their environmental reputation, with guests praising their commitment to protecting local marine life. “In tourism, perception matters,” says Mendez. “Our systems let resorts show they’re serious about sustainability—without sacrificing guest experience.”

When industries need ultra-pure water for sensitive processes—think pharmaceutical manufacturing, semiconductor production, or laboratory research—they turn to Austrian CleanTech AG. Based in Vienna, this precision-focused company has built its reputation on delivering high-purity water treatment systems that meet the strictest global standards, including USP, EP, and ISO 3696 Grade 1. Their core technology? Advanced membrane systems, including reverse osmosis (RO), nanofiltration, and ultrafiltration, paired with electrodeionization (EDI) for polishing. The result? Water with less than 1 part per billion (ppb) of total dissolved solids (TDS)—cleaner than most bottled water. One client, a biotech firm in Graz, relies on Austrian CleanTech’s “PureFlow X” system to produce the ultra-pure water needed for vaccine development. “In our industry, water quality can make or break a product,” says the firm’s lab manager, Dr. Sophie Berger. “Austrian CleanTech’s system is so reliable, we never have to worry about contaminants affecting our research.” But Austrian CleanTech doesn’t just excel in high-tech industries. They also work with hospitals, where their systems treat wastewater containing pharmaceuticals and pathogens, ensuring safe discharge into public sewers. Their “MedWaste Treat” units use UV disinfection and activated carbon adsorption to remove 99.9% of pharmaceuticals, protecting both the environment and public health. “Precision is in our DNA,” says CEO Thomas Koch. “Whether we’re producing ultra-pure water for a lab or treating hazardous medical waste, we never compromise on quality.” It’s this dedication to excellence that has made Austrian CleanTech a trusted partner for industries where “good enough” simply isn’t enough.

For small towns and rural communities across Central and Eastern Europe, affordability and simplicity are key when it comes to sewage treatment—and Polish EcoEngineering SA (PEE) delivers on both fronts. Founded in Warsaw in 2005, this company specializes in decentralized treatment systems that are easy to install, operate, and maintain, making them perfect for areas with limited budgets and technical expertise. Their most popular offering, the “EcoVillage” series, is a compact, prefabricated system that can treat wastewater for communities of 50 to 5,000 people. Unlike complex municipal plants, the EcoVillage requires no specialized operators—local staff can be trained in just a day—and it runs on minimal energy, often powered by solar panels or wind turbines. A village in southern Poland with 800 residents installed an EcoVillage system in 2022, replacing outdated septic tanks that were contaminating local groundwater. Today, their treated water meets EU discharge standards, and the system costs just €200 per month to run. “We designed the EcoVillage for people who need reliable treatment without the complexity,” says PEE’s co-founder, Anna Kowalski. “Small communities shouldn’t have to choose between clean water and financial stability.” PEE also stands out for its commitment to local partnerships. They work with regional contractors to assemble and install their systems, supporting local economies and ensuring quick response times for maintenance. “When a client calls with a problem, we’re not sending someone from Warsaw—we’re sending someone from their own region,” Kowalski explains. “That means faster service and stronger relationships.” It’s this combination of affordability, simplicity, and local support that has made PEE a leader in decentralized sewage treatment across Poland, Hungary, Czech Republic, and Slovakia.

Rounding out our list is Belgian WaterGroup NV, a Brussels-based company that’s redefining sewage treatment with its integrated water management approach. Instead of viewing treatment in isolation, they see it as part of a larger ecosystem, connecting wastewater treatment with rainwater harvesting, stormwater management, and water reuse to create closed-loop systems for cities and industrial parks. Their flagship project, the “WaterLoop City” system in Antwerp, is a prime example. Installed in a 500-acre industrial zone, WaterLoop combines sewage treatment, rainwater collection, and greywater recycling to meet 70% of the zone’s water needs. Treated wastewater is used for cooling towers and landscape irrigation, while rainwater is stored and used for fire safety and toilet flushing. The result? A 45% reduction in freshwater consumption and a 30% cut in sewage discharge. “Water management isn’t just about treating waste—it’s about optimizing every ｄｒｏｐ,” says WaterGroup’s urban planning director, Luc Vandermeulen. “Our systems turn cities into water-smart ecosystems, where nothing is wasted.” At the heart of WaterLoop and other WaterGroup systems is their smart monitoring platform, “AquaMind,” which uses IoT sensors and AI to track water quality, usage, and system performance in real time. AquaMind can predict maintenance needs, detect leaks, and even adjust treatment processes based on changing conditions—like heavy rain or increased industrial activity. “AI is our secret weapon,” Vandermeulen adds. “It lets us be proactive, not reactive, ensuring our systems run at peak efficiency 24/7.” With projects in Brussels, Amsterdam, and Lyon, WaterGroup is proving that integrated water management is the future of sustainable urban development.