
Closing the water loop: water, smarter, together
Sodai, part of Nijhuis Saur Industries, turns every water challenge into an opportunity. Through R&D, proprietary technologies, and full-risk service models, we reduce the water footprint, optimize resource efficiency, and deliver measurable impact for industry, communities, and the environment.
Our 4Rs model — Reduce, Remove, Reuse, Recover — is designed to close the water loop and support industries and municipalities through a high-efficiency ecological transition.
We work for a more resilient, efficient, and regenerative future
+ Shape your future sustainably.
Learn more about our innovative membrane DEEPEST technology
Innovating water, empowering industry


Sustainable water management:
We develop integrated strategies to manage the full water cycle, from sourcing and treatment to reuse and discharge, with a focus on environmental compliance, resource optimization, and long-term business resilience. Our solutions help reduce water dependency and support ESG goals across industrial and municipal sectors.

Operations & Maintenance (O&M)
Our full-scope O&M services ensure consistent plant performance, regulatory compliance, and cost-effective operation. From predictive maintenance to real-time monitoring, we take full responsibility for operational excellence, allowing clients to focus on their core business with peace of mind.

Research and Development (R&D)
Sustainability and innovation drive everything we do. Our in-house R&D and collaborations with academic and industry partners lead the development of advanced treatment technologies that address today’s most critical water and environmental challenges.

Water as a Service (WAAS)
Our WaaS model delivers flexible, performance-based water treatment services. We design, build, and operate water infrastructure for our customers, turning capital expenditures into predictable operational costs while ensuring measurable results in sustainability and efficiency.
Discover our solutions

- Mining and minerals
- Energy
- Semiconductor industry
- Pulp & Paper
- Pharma & personal care
- Fish processing
- Food & Beverage
Membrane filtration
- Process water
- Industrial water

- Mining and minerals
- Energy
- Semiconductor industry
- Pulp & Paper
- Pharma & personal care
- Fish processing
- Food & Beverage
Aerobic treatment
- Industrial water

- Industrial
Filter and screening systems

- Mining and minerals
- Energy
- Semiconductor industry
- Pulp & Paper
- Pharma & personal care
- Fish processing
- Food & Beverage
Coagulation & Flocculation
- Industrial water
- Process water

- Industrial
Dissolved Air Flotation solutions (DAF)
- Pulp & Paper
- Fish processing
- Food & Beverage
- Industrial
- Municipal
Biogas treatment

- Food & Beverage
- Pulp & Paper
- Energy
- Semiconductor industry
- Mining and minerals
Demineralized Water Treatment
- Process water
- Industrial water

Key figures
Certifications

- Certification 1
- Certification 2
- Certification 3
- Certification 4