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Your challenges

Consistency of wastewater quality & reducing operational complexity and maintenance

Reduction of organic pollution (COD/BOD)

Organic pollution can come from households, industry, agriculture, and animal-related activities. If not properly treated, these pollutants can affect water quality, ecosystems, and public health. Effective aerobic treatment helps reduce organic pollution and supports safe, compliant wastewater discharge.

Regulatory compliance

Meeting discharge requirements is one of the most important challenges in wastewater treatment. Our aerobic solutions help you comply with strict environmental regulations, reduce operational risks, and protect your reputation by supporting reliable monitoring, reporting, and consistent effluent quality.

Adaptability to variable loads

Industrial and mixed municipal wastewater can vary significantly in flow and composition. NSI BIOCTOR solutions are designed to respond to these changing loads, helping maintain stable treatment performance and compliance with discharge requirements.

How can NSI meet your needs?

Through the NSI BIOCTOR product group, NSI offers a broad portfolio of aerobic biological treatment solutions tailored to your wastewater needs. Whether your challenge is reducing COD/BOD, managing variable loads, meeting discharge limits, or improving operational reliability, we help you select the most suitable process for your application. Our experts assess your wastewater characteristics, site conditions, and performance requirements to design a solution that delivers stable treatment results, efficient operation, and long-term compliance.

Our solutions

BIOCTOR-Continuous
A reliable continuous wastewater treatment solution based on the proven activated sludge process. BIOCTOR-Continuous combines biological treatment with gravity-based sludge separation in a secondary clarifier, ensuring stable effluent quality and dependable performance for municipal and industrial applications.

BIOCTOR-Flot
A compact continuous wastewater treatment solution based on the proven activated sludge process. BIOCTOR-Flot uses Dissolved Air Flotation (NSI i-DAF) for sludge-water separation instead of a conventional clarifier, enabling a smaller biological reactor footprint while maintaining reliable treatment performance. 

BIOCTOR-SBR
A compact and flexible sequencing batch reactor solution that treats wastewater in a single tank through a series of controlled process phases. BIOCTOR-SBR is well suited for variable flows and loads and can support both nitrification and denitrification within the same reactor, helping achieve reliable treatment performance in a space-efficient design. 

BIOCTOR-MBR
A high-quality membrane bioreactor solution that combinescombines continuous activated sludge treatment with advanced membrane separation. BIOCTOR-MBR usesflat plate or hollow fiber membrane modules to separate treated water from sludge, delivering excellent effluent quality in a compact design. The high-quality effluent can also be suitable for water reuse applications, depending on the required standards and local regulations. The membranes The membranes can be installed directly inin the aeration tank or in a separate membrane tank, depending on the application and site requirements. 

FlooBed® MBBR
A compact and highly efficient Moving Bed Biofilm Reactor solution and part of the NSI BIOCTOR portfolio. FlooBed® MBBR uses proprietary biofilm carriers in combination with optimized, energy-efficient aeration and mixing, supported by continuous process control. Microorganisms grow as a biofilm on the surface of the carriers, which remain suspended and continuously mixed in the reactor. This creates a robust biological treatment process that helps deliver reliable performance, a compact footprint, and stable effluent quality for municipal and industrial wastewater applications.

Click here to learn more about FlooBed® MBBR

BIOCTOR-HRNR
A high-rate biological nitrogen removal solution for highly concentrated side streams, such as effluent from anaerobic digesters. BIOCTOR-HRNR uses specialized bacteria to convert ammonium and nitrite directly into nitrogen gas, offering key benefits such as low energy consumption, no need for external carbon dosing, and reduced sludge product.

Nereda®
Nijhuis Saur Industries partners with Haskoning to bring Nereda® technology to the industrial wastewater market. Nereda® is an advanced aerobic granular sludge process that treats wastewater using dense, fast-settling biomass granules. These granules enable multiple biological treatment processes to take place simultaneously, delivering high-quality effluent with lower energy use and a compact footprint.

New VPA™ 
Nijhuis Saur Industries partners with Vortech to bring Vortex Powered Aeration (VPA) into its biological aerobic treatment solutions (NSI BIOCTOR). VPA is an innovative aeration technology and a modern alternative to both conventional fine bubble diffused aeration systems and traditional surface aerators. By generating fine bubbles from above the water surface, VPA eliminates the need for blowers, air piping, submerged diffuser grids, and heavy surface aeration equipment. This results in faster installation, easier above-water maintenance, improved safety, and reduced operational complexity for efficient and reliable wastewater treatment.

Our solutions

  • Municipal
  • Industrial

Aerobic – FlooBed® MBBR

  • Wastewater
  • Industrial water

A highly efficient and compact biological treatment process to treat a wide variety of industrial and municipal wastewater streams and ensure environmental compliance. The patented (...)

Customer benefits

Our aerobic treatment solutions combine deep process expertise with intelligent design, helping you achieve greater control, consistent performance, and long-term operational savings. 

Comply with local and international wastewater regulations

Aerobic treatment solutions help you meet strict local and international discharge requirements by efficiently reducing BOD and COD in the effluent. By supporting carbon removal and nitrification in one biological process, these systems deliver reliable wastewater purification and consistent compliance performance. 

Robust system and reliable operation

Aerobic systems are designed for stable, reliable operation. Automated controls for aeration, mixing, and sludge removal reduce the need for continuous manual monitoring and enable real-time process optimization, helping maintain consistent performance with lower operational complexity. 

Expertise

By working with NSI, you gain access to experienced technologists and engineers with a proven track record in delivering successful wastewater treatment installations across both industrial and municipal sectors. 

Customized solutions

The NSI team assesses each client’s specific requirements and designs tailored wastewater treatment solutions that align with the required flow rates, pollution loads, site conditions, and regulatory standards. 

Turnkey

From feasibility studies and design to installation, commissioning, and after-sales support, NSI manages the complete project journey to ensure smooth implementation, reliable performance, and long-term customer support. 

Contact our experts

Contact our experts

Frequently Asked Questions (FAQ)

Properly designed and operated aerobic systems can remove over 90% of BOD and suspended solids, helping deliver reliable effluent quality and meet discharge requirements.