increase your efficiency through our experience

Our knowledge is based on 30 years of experience and worldwide activity.

We rely on practical work and our own developments as well as publications -

and all this with a committed and dynamic team.


waste water

Experts in Water and Energy

NWT OG is a company headquartered in Salzburg, Austria and specialises in process engineering and consulting in the water and energy sectors as well as industrial projects and internationally financed public sector projects

By more than 30 years of experience worldwide, NWT is a sought-after and competent partner in the water and energy market and offers its customers a unique range of experience and knowledge

  • extensive knowledge 
  • active worldwide for 30 years 
  • practice-oriented work 
  • own developments and publications 
  • nevertheless young and dynamic team 

our service



  • plant optimisation, systematic analyses of the status quo, improvements concepts with cost/benefit-analyses


  • energy saving concepts, consulting for contracting models, ENYSTO Contracting Modellen, ENYSTO


  • Planning and consulting, research & development, designs & studies, project revisions for process engineering, hydraulics and dimensioning

waste water

  • Consulting, planning, preparation studies, special knowledge in the fields of rangeen konventionelle Technologien, Lagunen, SBR, MBR, physikalisch-chemische Behandlung RO, anaerobe Technologien, Filtration, Schlammbehandlung, hydraulische Optimierungen


  • Plant optimization with BioWin Simulationssoftware


What you can expect from us

work is interdisciplinary and practice-oriented

Work in the fields of construction, machine, electrical engineering and automation is interdisciplinary and practice-oriented across all disciplines. Collaboration and exchange are crucial for successful projects.

efficiency instead of hectic

Efficiency is the key to success. Instead of falling into a hectic pace, we optimize processes to save time and resources. We take the time to streamline processes so that we can work faster and with less stress.

quick and flexible response 

Reacting quickly and competently to changes in the initial situation is a decisive success factor for our company. An agile way of working enables quick decisions and rapid implementation in the event of unforeseen developments.


years of support for customers and projects

The intensive and personal contact is very important to us. Therefore, we are very proud to support many of our customers even after many years.

Our products



The ENYSTO stratified tank enables efficient heat storage of a maximum of 2,000 litres of water up to 160 kWh for your heating and hot water requirements.



an inline, vertical mixing system with pneumatic (air) agitation for use in sewage treatment and drinking water treatment plants