SEEPEX Environmental Engineering

SEEPEX Progressive Cavity Pumps for Wastewater

Protecting the environment is one of the most important topics of our time and is important to Seepex Environmental Engineering. One key task is cleaning wastewater, specifically municipal and industrial sewage with the objective to restore the natural water quality. The wastewater industry deals with the most complex chemical, biological and mechanical processes. As a result, the technology used in these processes plays an important role in safeguarding our environment.

To meet the demanding standards of neutralization and filtration, reducing organic pollutants as well as eliminating nitrogen and phosphates, sewage treatment plants must constantly upgrade their facilities to keep up with developing technology.

SEEPEX answered this challenge with our many years of experience and ability to provide application-based innovations. SEEPEX progressive cavity pumps, macerators and control systems are used in almost all processes in the wastewater industry. They comply with strict national and international environmental regulations, and have the following advantages:

  • Progressive technology
  • High operational safety
  • Significant ease of maintenance
  • Comprehensive services

Thanks to the modular system with 8 product groups and 27 ranges, SEEPEX offers the optimum technical and economical solution for almost every application in the wastewater industry.


SEEPEX Environmental Engineering – Solutions for your Industry:

Strict Guidelines - Increased Environmental Protection

The Cleanest WWT Solutions From SEEPEX

Municipal and Industrial wastewater treatment is subject to strict environmental legislation which are regularly reviewed and updated on a global level. In order to meet legislation and ensure ongoing compliance our customers are always looking for innovative solutions to their challenges that can improve up-time, minimize  downtime and play a big role in energy and chemical reduction, whilst at the same time maximize  the plant’s output.


Innovative Pump Technologies - Smart Solutions for Predictive Maintenance

SEEPEX supports the purification and clarification of wastewater with state-of-the-art wastewater pump technology. These pumps can be used in sludge dewatering, sludge drying and incineration, sludge treatment and mixing, or optimized digestion processes. Thus, they can contribute to much more efficient, cost-reduced and simplified processes.

SEEPEX wastewater pumps are particularly economical, as they convey highly dewatered sludges with virtually no restrictions on viscosities or abrasive materials. Slurries with dry matter contents of up to 45% are transported effortlessly.

Our standard wastewater pumps are robust all-rounders that can be used to reliably pump on primary sludges or thickened sludges. For discharge from thickeners or silos, our hopper wastewater pumps (optionally with screws and blades) are suitable for conveying dry masses onward without disruptive bridging.

With intelligent maintenance concepts, we want to help our customers in the wastewater industry to carry out their activities quickly and easily, thus saving time and operating costs in the long term.


SEEPEX - Pumps for Wastewater Treatment

Sludge and Cake Dewatering

After sludge treatment, sludge volume is reduced by various dewatering methods with the end result being a product with a dry solids content of 18 – 45 %. The physical characteristics of the sludge can vary significantly, it is therefore essential that the dewatered sludge handling system selected has the flexibility to handle these demands.

SEEPEX specializes in handling highly-viscous, non-flowable products and finding the most economical solution for the most challenging applications.

Some sample applications:

  • BN range   pumps fill dewatering systems.
  • Extensive  T ranges of pumps for conveying dewatered sludge.
  • M range  macerators eliminate rags, homogenize the sludge and reduces the size of any solids present.
  • Boundary layer injection systems to reduce pipework friction loss in order to optimize operational costs.
  • Control systems to either enhance the feeding of dewatering devices or optimize the handling of dewatered sludge.


Sludge Drying and Incineration

Sludge drying and incineration centers process sludge from external sources. Depending on the source, the imported sludge can be raw, biological, mixed or digested. As a result, the pumping systems are faced with arduous and diverse requirements.

SEEPEX offers sludge cake pumping systems that are designed to integrate perfectly with each specific application.

Some sample applications:

  • BTHE , BTE  or BTI  range pumps convey dewatered or imported sludge into silos for temporary storage.
  • BTES  or BTEI  range pumps convey dewatered sludge from silos and the intermediate storage to dryers or incinerators.


Wastewater and Sludge Treatment

SEEPEX progressive cavity pumps and macerators offer the best conveying solutions in all areas of wastewater disposal and sludge treatment. With SEEPEX technology, the sludge is efficiently pumped into thickening and dewatering machines, optimally preparing it for further processing such as drying, incineration, thermal hydrolysis or biogas generation.

Some sample applications:

  • BN range pumps convey primary and secondary sludge to the thickener and dewatering device.
  • BN , BTQ and BT  range pumps convey the thickened sludge to the digester.
  • T range  pumps for back mixing dewatered sludge to a thickened sludge for onward processing.
  • T range pumps and associated controls for handling dewatered sludge.
  • M range macerators shred the solid and fibrous components often encountered within this industry.


Sludge Mixing

SEEPEX pumps convey and mix sludge from different sources, regardless of their initial dry solids content. Our pump’s mixing and dosing abilities provide further process options for the sludge and set the required dry solids content.

Some sample applications:

  • BTHE range pumps convey sludge with a dry solids content of 18-35% for temporary storage.
  • BTE, BTES range pumps back mix dewatered sludge to a thickened sludge to the correct dry solids concentration for further processing.
  • Seepex SCT  pumps pump liquid sludge into the SEEPEX mixer pump.
  • The CO product group control systems monitor the boundary layer injection, hopper level and pressure control and/or dry-running protection device (TSE).


Advanced Digestion

Anaerobic digestion is a proven process for breaking down organic substances and generating biogas. Advanced digestion using thermal hydrolysis intensifies sludge digestion by significantly improving decomposition. It generates higher biogas generation, a higher level of sterilization and the volume of sludge produced after dewatering is reduced; However, the thermal hydrolysis process changes the sludge properties, imposing significant requirements on the pump and materials.

SEEPEX develops tailor-made systems to meet the high demands in this type of process technology.

Some sample applications:

BTHE range open hopper pumps mix dewatered sludge to feed a thermal hydrolysis system.
BN range pumps convey hot sludge from the pulper to the hydrolysis reactor and digester.
BTHE range open hopper pumps convey "class A sludge" that is in accordance with US directives on pathogenic kill.


Metering Chemical Additives

Organic and inorganic additives are added to bring about various biological and mechanical processes in wastewater treatment. Precise metering and high safety levels are crucial, particularly when working with viscous, corrosive and abrasive additives.

Some sample applications:

  • MD/MDF  range pumps convey and meter flocculating agents e.g. synthetic polymer or copolymer and ferric salts which improve the separation of wastewater sludge.
  • BN/MD range pumps meter hypochlorite for disinfection.
  • BN range pumps meter chemicals for pH correction e.g. lime milk


SEEPEX Progressive Cavity Wastewater Pumps are highly reliable assets for all process steps within Wastewater Treatment Works.

High reliability for Copenhagen's wastewater system "In the long term, we are even questioning if we need "duty stand-by pumps". That's how satisfied we are with the maintainability of the SEEPEX SCT wastewater pump." 

Torsten Lauersen Vig, Maintenance Manager
BIOFOS Lynetten

Talk to one of our Experts

Reach out to our team of Spraying, Pumping, Filtering, Valve, and Systems Specialists today. We know we can help you with any municipal or industrial application challenges.