Aerial photo of a waste water treatment plant

Waste Water Treatment

KSB is a trusted partner for waste water treatment – worldwide

KSB sets standards for waste water treatment around the globe. The waste water treatment plant in Shanghai, one of the biggest in Asia, is just one example of where KSB’s products have proven their worth.

The challenges faced in waste water treatment are growing

Engineering contractors dealing with waste water treatment across the globe are all facing the same challenge: sewage, waste water and surface water increasingly contain solids such as wet wipes and stringy material liable to clog pumps. Particularly in times of decreasing budgets and increasing process complexity, waste water treatment plants must be operated as efficiently and smoothly as possible with maintenance requirements being kept to a minimum.

Waste water pumps used in a plant for waste water treatment

KSB waste water pumps from the Sewatec range used in the central waste water treatment plant Volkach, Germany

KSB ensures that waste water treatment is reliable and efficient

As an expert in waste water treatment, KSB offers bespoke all-in solutions for pumps, valves and service which help you to operate your system more efficiently and reliably. Optimised processes improve your system’s performance while reducing maintenance costs.

KSB’s energy-efficient, low-maintenance pumps are employed in waste water treatment plants at all cleaning stages, e.g. for preliminary screening in intake pumping stations, handling primary and floating sludge, and recirculating activated sludge in biological waste water treatment.

Waste water pumps from KSB: non-clogging and absolutely reliable

Designed with non-clogging impellers and large free passages, waste water pumps from the KSB Amarex KRT and Sewatec type series ensure efficient operation even when handling fluids with a high solids content. Energy-saving drives, wear-resistant materials and smart automation products optimise your processes, improve the performance of your system and reduce maintenance requirements. Absolutely water-tight cable entries and mechanical seals with covered springs for use in particularly abrasive waste water are just some of the special design details contributing to even higher levels of reliability.

Mixers produced by KSB aid the degradation of pollutants by circulating waste water. Featuring an optimised hydraulic system and break-proof propeller as well as offering especially long maintenance intervals, the KSB Amaprop mixer sets standards in this segment. The portfolio is complemented by reliable valves such as the HERA-BDS knife gate valves which can be used to shut off pipes, during maintenance work.

All waste water pump performance data is verified at our factory’s test facilities. With KSB Helps and KSB EasySelect we provide two professional software solutions to ensure optimum and efficient pump selection.

Thanks to decades of experience on the market, KSB offers comprehensive application knowledge – even for large-scale projects. You can benefit from application and service specialists on hand to provide support throughout the entire life cycle of your system.

Our portfolio

KSB offers a wide range of products for waste water treatment

  • Dry-installed waste water pumps
  • Pressure booster systems
  • High-pressure pumps
  • In-line pumps
  • Mixers, agitators, tank-cleaning units
  • Standardised pumps
  • Submerged recirculation pumps
  • Tubular casing pumps and submersible pumps in discharge tubes
  • Volute casing pumps
  • Submersible motor pumps

Applications include

  • Sewage treatment plants with mechanical, biological and chemical waste water treatment
  • Sludge treatment
  • Flood and stormwater overflow structures
  • Tank cleaning
  • Surface drainage
  • Drainage

Your benefits

  • A broad portfolio featuring pumps of different designs for all waste water treatment processes ensures you will find the product you need.
  • Expert advice for consultants, engineering contractors and operators thanks to extensive international experience
  • Reliable and efficient operation thanks to non-clogging
  • Optimised selection of pumps and matching valves with Helps und KSB EasySelect
  • Reliable international supplier of pumps, valves and service – on the market for 150 years
  • Service and spare parts solutions covering the entire product life cycle complemented by 24-hour service from more than 3000 specialists in over 170 service

Find suitable pumps for waste water treatment

Whether industrial waste water or municipal sewage treatment:

KSB offers the right product, whatever the requirements of waste water treatment plants.

Amarex KRT

Amarex KRT

Horizontal or vertical single-stage submersible motor pump in close-coupled design, with various next-generation impeller types, for wet or dry installation, stationary or transportable version, with energy-saving motor and models for use in potentially explosive atmospheres.



Volute casing pump for horizontal or vertical installation, with various next-generation impeller types, discharge flange to DIN and ANSI standards. Explosion-proof version available.



Horizontal submersible mixer with self-cleaning ECB propeller, close-coupled design, with coaxial spur gear drive. Explosion-proof version available.

Find suitable valves for waste water treatment



Knife gate valve to DIN/EN with wafer-type single-piece or two-piece body made of nodular cast iron, bi-directional, with gland packing, non-rising stem, corrosion-protected by epoxy coating.



Gate valve to DIN/EN with flanged ends, elastomer-coated wedge, bolted bonnet, rotating stem, inside screw, body made of nodular cast iron.



Double-offset butterfly valve with epoxy coating. Perfect shut-off in either flow direction. Flanged ends to EN standards, body and valve disc made of nodular cast iron.

KSB success stories – read for yourself

Map of the Emscher canal

Energy efficiency for Europe’s largest wastewater treatment project

The 51 km long Emscher sewer is considered to be the largest wastewater project in Europe and serves the sustainable restoration of the River Emscher in the Ruhr area of Germany.

Illustration of the phases of a product life cycle: Consultation and analysis, commissioning, operation and repair

Service at KSB SupremeServ means being fully looked after

KSB SupremeServ offers you a comprehensive range of services and spare parts for pumps, valves and other equipment – including for products from other manufacturers – from face-to-face consultation to installation, commissioning, maintenance and repair. More than 3500 specialists in over 190 service centres worldwide are available around the clock, seven days a week. Concentrate on your core business – and let us take care of the rest.

Inspection service

Inspection service

KSB’s inspection service provides regular pump inspection and pump maintenance to ensure the reliable operation and increased availability of your system.

  • Preventing failures
  • 24-hour on-call service
3D printing for pumps and valves

3D Printing

3D printing opens up new possibilities in spare parts procurement. An ideal solution if you need a spare part quickly.

  • Additive manufacturing of spare parts
  • Swift delivery
Reverse Engineering for pumps and valves

Reverse Engineering

Reverse engineering makes it possible to quickly reproduce pump spare parts that are hard to find or no longer available.

  • Straightforward reproduction of spare parts
  • The quality matches that of the original