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Sewer overflow management with a horizontal screen for operational safety and water protection

Country of Origin: Germany
Reference Number: TODE20210415003
Publication Date: 16 April 2021


A German SME offers a solution to effectively prevent sewer network overflows. It is based on a horizontal screen that is combined with software and precipitation portal data. In this unique combination it becomes a new industry 4.0 standard. Thanks to the special design, hydraulic loss  and production costs are significantly reduced. Partners are sought for commercial agreements with technical assistance.


In combined sewer networks, overflows usually occur when the storm- and wastewater in the drainage network exceeds the maximum storage capacity of the drainage channels, storm water retention tanks, and wastewater treatment plants, leading to serious pollution in the receiving water bodies.  

A German company that has 40 years of experience in the water industry considered this issue from a holistic approach. As an industry 4.0 technology leader in the water industry, they developed a networking solution for effective combined sewer overflow management. A horizontal screen is a key smart machine in this network. The horizontal bars are bullet shaped. This design leads to a reduction of hydraulic loss. The integration with the German company's self-developed software, a precipitation data portal and SCADA (supervisory control and data acquisition) enables a dynamic and optimal cleaning process regarding cleaning performance, service lifespan of equipment, energy consumption, operational and maintenance costs. Furthermore, the horizonal screen can hold back micro particles up to 4mm.

Partners are sought for commercial agreements with technical assistance. Potential partners are engineering offices, consulting firms, water companies, or the companies performing civil work, construction and installation. The partners should integrate the solution in their projects and services. The German company offers technical support, marketing materials and other assistance in end-user meetings.

Advantages and Innovations

Unique advantages of the horizontal screen include: 
1. The hydraulic loss and manufacturing costs are reduced thanks to the bullet-shaped horizontal bars.
For example, the comparison of the bar screen (bar thickness 3mm, bar distance 5mm) and perforated plate screen (circular perforation) in terms of free flow rate and screen lengths are as below:
- Specific free flow rate:
+ Bar screen : approx. 63%
+ Perforated plate screen : approx. 35%
- Screen length required for identify absolute flow rate:
+ Bar screen: 100%
+ Perforated plate screen: +80%

2. The operational costs are reduced up to 70% with high personnel impact thanks to the integration of the German company's IT software.
3. Amortization from the 4th year thanks to event-dependent operational mode.
4. Up to 20 year of service life can be added with specific software

Stage Of Development

Already on the market

Requested partner

Partners are sought for commercial agreements with technical assistance.
Type of partner: Active in civil works, construction installation, water-related municipal and industrial projects
Role of partner: Integrate solution in their offer, promote the solution to end-users, implementation of products in real projects
The German company will offer technical assistance as required, e.g. online training, process design and online support as well as marketing support e.g. brochures, catalogues.

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