Typical challenges - and how we solve them
In areas with flat topography, wastewater pressure pipes transport wastewater from the pumping station to the sewage treatment plant. If deposits narrow the cross-section of the pipes and impair the flow, we ensure that the pipes remain efficient in the long term.
The problem
Water-saving appliances and reduced consumption mean that wastewater remains in the pipes for longer, which leads to the formation of a screen. Sand and grit settle, damp toilet paper hardly decomposes.
The result:
lower flow rate, longer pumping times, pressure build-up, odor formation, corrosion due to biogenic sulfuric acid – and rising energy costs due to the reduced hydraulic performance.
The solution
With Comprex® technology, we clean wastewater pressure pipes effectively and in an environmentally friendly way – with pulses of compressed air and water that loosen and remove deposits at speeds of up to 70 km/h.
Completely chemical-free, with minimal water consumption and usually during ongoing operation (with existing or accumulated water).
Typical application:
Wastewater pressure pipes – targeted cleaning of individual sections, e.g. culverts.
The result
Deposits are completely removed from pipes, bends and branches. The flow capacity is hydraulically restored.
You increase the efficiency of your pipelines and reduce your energy costs at the same time. We keep downtimes to a minimum by cleaning during operation.
With Comprex® cleaning, you create the ideal conditions for economical, sustainable and safe network operation.
Comprex® improves the performance of the wastewater pipe
The following table shows an example of cleaning at a drinking and waste water association and the flow rate (Q = volume flow) before and after cleaning – and thus the significant increase due to Comprex® cleaning(to the technical article).
| Line section | Q Design [m³/h] | Q before [m³/h] | Q after [m³/h] | Increase [m³/h] | Cleaning success [%] |
|---|---|---|---|---|---|
| Section A | 75-110 | 75 | 110 | 35 | 100 |
| Section B | 80-130 | 80 | 125 | 45 | 96 |
| Section C | 100-140 | 90 | 125 | 35 | 89 |
| Section D | 80-270 | 180 | 250 | 70 | 93 |
Benefit from the Comprex® advantages now!
Whether drinking water and waste water in municipalities, industrial piping systems or water pipes in buildings – each area has its own requirements. We work with you to develop a tailor-made cleaning solution that works, saves resources and delivers lasting results.
Fast, thorough, resource-saving - without chemicals
Up to 80% shorter
Up to 100x stronger
Up to 90% less
Up to 10x faster
3 steps to a clean line
Step 1 Analysis & planning
We work with you to plan the optimum cleaning operation – individually tailored to your business, the condition of the pipes and your objectives. Wastewater pressure pipes can usually be cleaned “online” during operation with comprex.
Step 2 Preparation
We take care of planning the cleaning sections, determining the entry and exit points and handling the entire logistics process for you.
Our team of technicians will come to you with the appropriate equipment and remain on site for the duration of the project. You can find details of our self-sufficient trailers here.
Step 3 Cleaning & commissioning
We clean with existing or accumulated wastewater. The water is slowly pumped into the pipe section to be cleaned and the air is dosed in pulses via alternating feed points(Comprex®). Deposits are reliably removed – without chemicals and with minimal water consumption.
Comprex® also cleans longer distances efficiently. Bends, branches and culverts are no obstacles in this process. In worksheet DWA-A 113 “Hydraulic dimensioning and performance verification of wastewater pressure systems”, the DWA regulations cite the pulse flushing method as a recognized option for cleaning pressure pipes.
With our experienced team of technicians, we take on the complete cleaning of your wastewater pressure pipes – equipped with mobile Comprex® cleaning trailers and the appropriate equipment. Whether as a one-off or regularly as part of your maintenance concept: we reliably ensure clean pipes and safe operation.
Fast, professional and ready for use: you book our service and our experienced team of technicians will come to you with the necessary equipment and carry out the cleaning for you – whether as a one-off or regularly as part of your maintenance concept.
Would you like to be independent and clean your pipe systems individually and regularly or integrate your own Comprex® cleaning system into your operational processes? No problem, whether mobile or stationary – we have the right system for you and will train your staff.
"Our conclusion: The test of the Comprex® unit can be rated as thoroughly positive. The cleaning effect can be seen as very good, in some cases even blockages could be loosened. Due to the rather simple operation, the unit could be operated without any problems after the short instruction. No problems were encountered during the test phase.
At this point, we would like to thank you again for the test opportunity and the trust you have placed in us."
"We have had very good experiences with comprex and are very satisfied with the cooperation that has grown over the years. The Hammann GmbH technicians know our network, arrangements are quick and uncomplicated and the assignments are already a fixed part of our annual planning for network maintenance."
Cleaaning blocked culverts
Large sewage treatment plant
Large-scale sewage treatment plant
Discover our other municipal applications
Frequently asked questions about cleaning wastewater pressure pipes
How does cleaning with Comprex® work in wastewater pressure pipes?
The patented process uses targeted air-water pulses that move through the pipe at high speed (up to 70 km/h). This creates strong shearing forces that loosen the sieve skin and other deposits – completely without chemicals and with minimal water consumption.
Is cleaning with Comprex® suitable for all types of pipes?
Yes, the process is gentle on the material and can be used in all common pipe materials – such as PE, GRP, GGG and steel pipes. Comprex® is suitable for all pressure pipes in the wastewater system in which deposits, sieve skin or foreign matter impair the flow rate.
Can cleaning be carried out during operation?
Yes, the accumulated water is used for cleaning and does not have to be removed.
How long does cleaning take?
Depending on the length of the line, structure and degree of soiling, usually between a few hours and one working day.
The line can then be used again immediately.
How is the cleaning effect verified?
The cleaning performance is documented via the hydraulic performance increase: by measuring the delivery times and comparing the pump characteristics in accordance with DWA-A 113.
