 |
Top 48 Wastewater recycling startups
Sep 30, 2025 | By Marjana Bačić | 24 |
These startups develop new wastewater recycling technologies such as membrane bioreactors, anaerobic digestion, reverse osmosis filtration, electrocoagulation, advanced oxidation processes, UV disinfection and biofiltration.
1
Country: Italy | Funding: €2.5M
Circular Materials delivers sustainable & innovative solutions to recover critical raw materials from black mass and industrial wastewater.
Circular Materials delivers sustainable & innovative solutions to recover critical raw materials from black mass and industrial wastewater.
2
Country: USA | Funding: $392.4M
Gradiant is a solutions provider and developer of cleantech water projects for advanced water and wastewater treatment.
Gradiant is a solutions provider and developer of cleantech water projects for advanced water and wastewater treatment.
3
Country: Canada | Funding: $146.7M
Ostara’s proprietary Pearl technology recovers nutrients from industrial, agricultural, and municipal water treatment streams, transforming them into granular fertilizers that improve crop yields and reduce runoff. We are transforming the commodity market value chain and closing the loop on phosphorus for future generations.
Ostara’s proprietary Pearl technology recovers nutrients from industrial, agricultural, and municipal water treatment streams, transforming them into granular fertilizers that improve crop yields and reduce runoff. We are transforming the commodity market value chain and closing the loop on phosphorus for future generations.
4
Country: Canada | Funding: $126.8M
Anaergia maximizes resource recovery from virtually any waste stream, transforming waste into renewable energy, clean water, high-quality fertilizer, and recyclables. Anaergia provides complete, integrated solutions for municipal solid waste management, resource recovery in wastewater sector, and large‐scale farming & food production waste management.
Anaergia maximizes resource recovery from virtually any waste stream, transforming waste into renewable energy, clean water, high-quality fertilizer, and recyclables. Anaergia provides complete, integrated solutions for municipal solid waste management, resource recovery in wastewater sector, and large‐scale farming & food production waste management.
5
Country: USA | Funding: $98.8M
ZwitterCo provides revolutionary membrane solutions for the treatment of highly-impaired wastewater.
ZwitterCo provides revolutionary membrane solutions for the treatment of highly-impaired wastewater.
6
Country: Sweden | Funding: $69.9M
ORBITAL SYSTEMS is a Swedish clean-tech company that develops a water recycling technology to be used in domestic appliances.
ORBITAL SYSTEMS is a Swedish clean-tech company that develops a water recycling technology to be used in domestic appliances.
7
Country: Switzerland | Funding: $69M
Neustark is a concrete producer in bern using wastewater treatment plant by turning CO2 into minerals.
Neustark is a concrete producer in bern using wastewater treatment plant by turning CO2 into minerals.
8
Country: Canada | Funding: $37.1M
Axine Water Technologies is a developer of wastewater treatment technologies and solutions.
Axine Water Technologies is a developer of wastewater treatment technologies and solutions.
9
Country: Israel | Funding: $32.3M
Homebiogas develops bio-toilet which can convert human waste into cooking fuel sans the need to access sewers or water grids.
Homebiogas develops bio-toilet which can convert human waste into cooking fuel sans the need to access sewers or water grids.
10
Country: USA | Funding: $27.9M
Membrion is a manufacturer of ultra-low cost, high performance ion exchange membranes.
Membrion is a manufacturer of ultra-low cost, high performance ion exchange membranes.
11
Country: France | Funding: €23.2M
TOOPI Organics collects and transforms human urine into fertiliser products
TOOPI Organics collects and transforms human urine into fertiliser products
12
Country: USA | Funding: $25.4M
Epic CleanTec is decentralizing wastewater treatment and reuse into individual buildings or groups of buildings.
Epic CleanTec is decentralizing wastewater treatment and reuse into individual buildings or groups of buildings.
13
Country: USA | Funding: $21.3M
Aclarity is a VC-backed cleantech startup developing and selling water treatment systems to clean the world's water and wastewater.
Aclarity is a VC-backed cleantech startup developing and selling water treatment systems to clean the world's water and wastewater.
14
Country: UK | Funding: £15M
Impact Recycling has developed a breakthrough plastic recycling technology which separates the components of mixed plastic waste.
Impact Recycling has developed a breakthrough plastic recycling technology which separates the components of mixed plastic waste.
15
Country: USA | Funding: $10.5M
Aquagga cleans wastewater with less energy and develops innovative tech to create a positive societal impact in the developed and developing world.
Aquagga cleans wastewater with less energy and develops innovative tech to create a positive societal impact in the developed and developing world.
16
Country: USA | Funding: $275K
IX Power Clean Water is an innovative provider of cleantech solutions designed to treat and clean industrial wastewater so that freshwater resources can be preserved for families, crops, and communities.
IX Power Clean Water is an innovative provider of cleantech solutions designed to treat and clean industrial wastewater so that freshwater resources can be preserved for families, crops, and communities.
17
Country: USA | Funding: $7.4M
Glanris makes a sustainable, low cost hybrid filtration media that removes organics as well as metals from water. Its Biocarbon is made from the largest agricultural waste, rice husks, allowing for global expansion of our carbon-negative technology to reduce greenhouse gasses and sequester carbon at gigaton scale.
Glanris makes a sustainable, low cost hybrid filtration media that removes organics as well as metals from water. Its Biocarbon is made from the largest agricultural waste, rice husks, allowing for global expansion of our carbon-negative technology to reduce greenhouse gasses and sequester carbon at gigaton scale.
18
Country: Australia | Funding: $6.6M
Nexus eWater is a home water recycling platform that develops solutions converting grey water for home water and energy use.
Nexus eWater is a home water recycling platform that develops solutions converting grey water for home water and energy use.
19
Country: Singapore | Funding: $6.3M
Hydropleap provides advanced environmental-friendly technological water treatment solutions.
Hydropleap provides advanced environmental-friendly technological water treatment solutions.
20
Country: Israel | Funding: $6M
TaKaDu is a water network management company offering water utilities to improve network efficiency and planning decisions.
TaKaDu is a water network management company offering water utilities to improve network efficiency and planning decisions.
