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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

Mobile & Emergency Water and Wastewater Treatment Solutions

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
At Nijhuis Saur Industries (NSI), part of Saur Group, we deliver membrane filtration solutions that drive water reuse, resource recovery, and environmental compliance. Our membrane (...)
  • Mining and minerals
  • Energy
  • Semiconductor industry
  • Pulp & Paper
  • Pharma & personal care
  • Fish processing
  • Food & Beverage

Aerobic treatment

  • Industrial water
Aerobic biological treatment is a process that uses oxygen and microorganisms to remove COD and BOD, breaking down organic pollutants present in the wastewater into simpler, non-harmful (...)
  • Industrial

Filter and screening systems

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  • Mining and minerals
  • Energy
  • Semiconductor industry
  • Pulp & Paper
  • Pharma & personal care
  • Fish processing
  • Food & Beverage

Coagulation & Flocculation

  • Industrial water
  • Process water
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  • Industrial

Dissolved Air Flotation solutions (DAF)

Our DAF systems are engineered to provide high removal efficiency, operational flexibility, and reliable performance under varying conditions.
  • Pulp & Paper
  • Fish processing
  • Food & Beverage

Anaerobic treatment

  • Industrial water
Your challenges (...)
  • Industrial
  • Municipal

Biogas treatment

Your challenges (...)
  • Food & Beverage
  • Pulp & Paper
  • Energy
  • Semiconductor industry
  • Mining and minerals

Demineralized Water Treatment

  • Process water
  • Industrial water
At Nijhuis Saur Industries (NSI), part of Saur Group, we deliver high-performance demineralized water treatment solutions for industrial steam and heat systems. From boiler feedwater (...)

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Certifications

  • Certification 1
  • Certification 2
  • Certification 3
  • Certification 4

Contact us

Sodai

R. Montecuccoli 32
20147 Milano
Italy