About us

KWI designs and manufactures water and wastewater treatment equipment and is an expert in solid and liquid separation technology. Our extensive range of Dissolved Air Flotation (DAF) products has been developed and proven over many years. With thousands of installations, we have build up unrivalled operating experience on many diverse water and wastewaters to bring our customers both reliable equipment and reliable performance for industrial and municipal applications.

We can provide equipment or a bespoke process package that can include everything required to reduce industrial wastewater costs, allow water re-use or prevent the breach of environmental discharge consents.

KWI Dissolved Air Flotation solutions are based on proven process designs with exclusive, patented equipment and technology to meet our customers needs. The KWI brand name is synonymous with quality and efficiency and we strive for continuous improvement. Our international group allows us to access a network of the world-beating water treatment technologies providers.


KWI can look back on an impressive history,
characterized by innovative spirit, development and international growth.

• 1949

Company founded

Krofta Engineering SpA is founded by Dr. Milos Krofta in Milan, Italy.

• 1951

New Headquarter

A new headquarter is established in Lenox, Ma, in order to coordinate the growth of activities worldwide.


Krofta engineering

The successful activity of the company leads to the opening of the Krofta engineering college – Lenox Institute Water Technology.


DAF Design

A brand new high performance DAF is designed and patented with the name of Supercell.


Design, deploys, patents new DAF

The company designs, deploys, patents and installs a new unique combination of DAF clarification and double media sand filtration.


Workshop Austria

In the late eighties, Krofta Group opens its own workshop in Austria as a dedicated manufacturing and engineering center.


New Megacell

The new DAF patented Megacell concept is developed and installed


Krofta goes to KWI

The Krofta worldwide group is globally reorganized under the new trademark of KWI.


Headquarter to Austria

Dr. Krofta passed away. Operational headquarter was shifted from USA to Austria.

2002 – 2015

New Products

period KWI introduced innovations products (Unicell, Flotofilter, Unicell BF, Ecocell, API Separator, Lamella Settler)and patents (ADR, DryClean, Energy Recovery System, Coalescence Filter, DC Screen).


KWI – Member of SafBon

KWI is a member of Shanghai SafBon Water Service Co., Ltd. Mrs Vivian Lu was appointed as General Manager and CEO


KWI worldwide

KWI is the only company worldwide with the most complete range of DAF Dissolving Air Flotation (11 applications) and provides process packages for industrial and municipal applications


Our vision is to contribute to environmental protection and is based on our own initiative and responsibility. The continuous improvement in the environmental management as well as the legal and proper compliance of hazardous waste are our priorities. Innovation, research and development play a very important role in guiding the overall strategy of the KWI in delivering the best solutions to our clients and for the environment. In order to support and demonstrate KWI’s dedication to our mission and vision, the management of KWI has introduced and implemented ISO 9001 and ISO 14001.


The mission of KWI International is to fulfil the expectations of its business associates (customers, staff, suppliers, company owners, society and environment) to the best of its ability and is indicative of KWI’s success to date. The amongst the key management objectives are to strive for optimum fulfillment of the requirements and expectations of our customers as well as stringent safety and health protection of KWI personnel.


With our own dedicated factory in Ferlach, Austria we specialise in high-quality stainless-steel fabrication. All of our products are fabricated in a suitabe grade of stainless steel material, ensuring a corrosion free long life, extraordinary strength and reliability. We are proud of our machines commonly still operating after 40 years. Intimate cooperation between R&D, product engineering and fabrication ensures continuous improvements in product function and cost.


  • Long term expertise in design, engineering and production
  • Dedicated specialists in Stainless Steel production
  • EN-ISO 9001 and 14001 certified
  • Part of worldwide production and technology pool of SafBon group

KWI can look back on an impressive history, characterized by innovative spirit, development and international growth.

SafBon Group

In 2016 KWI became part of the SafBon Group.

SafBon’s business covers four main sectors: industrial wastewater treatment, municipal water treatment, solid waste treatment, gas regulator station and distributed energy. In all these sectors, Safbon is able to provide full services ranging from technology research and development, system engineering, integration, installation, and commissioning under the models of EPC, BT, BOT and PPP, etc. With more than 21 years of experience in the water industry, SafBon has developed a solid track record of more than 500 projects globally.

Innovation in technology has been the leading corporate strategy of SafBon. The company has 75 national patents and 38 authorizations in China and is constantly making significant efforts to improve the industrialization and application of new and upgraded technologies.

Through a series of mergers and acquisitions of European and American enterprises, leading advanced environmental technologies and capabilities have been introduced to SafBon and have helped complete SafBon’s environmental value chain service offering. The combined resources under one roof makes SafBon a solution provider for all customer requirements in the field of water and wastewater treatment.
KWI develops technical and commercial partnerships with two sister companies to propose a wider range of products and solutions, especially in water desalination and potable water.

SWT – North American specialist in filtration and high-performance solutions:

SafBon Water Technology, Inc (SWT) is a global integrated solutions provider for advanced water and wastewater treatment systems. SWT has over 30 years of experience in the water and wastewater treatment market with unmatched engineering capabilities. The company provides a single source solution for the design, manufacturing, financing, commissioning, and operation for all types of water and wastewater treatment technologies including conventional filtration, ultra/microfiltration, membrane bioreactors, and desalination with reverse osmosis.




ItN – German manufacturer of Ceramic Flat Membranes:

ItN Nanovation AG is specialized in applications and solutions of water filtration, specifically in reverse osmosis pre-treatment, and Moving Bed Bio Reactors (MBBR) and developing water treatment process, radium or arsenic removal through the use of their patented ceramic flat sheet ultrafiltration membranes. Their ceramic flat sheet membranes are contained with a filtration module and arranged in filtration towers for mounting in containers or as standalone units.


Quality and environmental management are a top priority at KWI.

KWI is ISO 9001 and ISO 14001 certified. What does the certifications mean for our customers? We work strictly according to the ISO standards. This means that by high transparency, a structured approach and continuous training of our employees, we achieve the highest quality standards across our processes. As a manufacturer air of flotation units for water and wastewater treatment, we act in the environment-friendly area and, of course, take our own ecological responsibility seriously.


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