Preventive maintenance sounds technical, but in practice it is above all the decisive factor for smooth and predictable system operation. In this interview, Yazan Alrwashdeh, Development and Project Engineer, explains why MBR modules are permanently exposed to hydraulic, mechanical and chemical loads and why small deviations often go unnoticed for a long time – until performance is already impaired. One thing becomes particularly clear: it is not individual measures, but the interplay of stable process control, uniform ventilation, reliable measurement technology and regular cleaning that makes the difference. Equally important are clearly defined operating limits, good pre-treatment and a forward-looking spare parts strategy.
Yazan’s conclusion is practical and clear: a stably controlled process is the best protection for membrane modules and thus the most important basis for economical operation.
3 questions, 1 expert
Yazan Alrwashdeh, Development and Project Engineer
Why is preventive maintenance crucial for MYTEX MBR modules?
Preventive maintenance is the basis for stable and economical operation of MBR plants. Membrane modules operate continuously under hydraulic, mechanical, and chemical stress. Without systematic monitoring, deviations often develop gradually and only become apparent when performance is already impaired
A structured maintenance approach makes it possible to detect changes early and at any time, so that countermeasures can be taken before performance is lost. Typical indicators include changes in transmembrane pressure, changes in permeate flow, or increasing air demand. If these trends are consistently evaluated, fouling processes can be controlled, unplanned downtime avoided, and the service life of the modules significantly extended. For operators, this means predictable operating conditions, stable effluent quality, and lower life cycle costs.
Which measures make the biggest difference in practice?
Operational experience shows that it is not individual measures that are decisive, but the interaction of several factors. Air distribution in the aeration tank is key. Uniform aeration prevents deposits on the membrane surface and stabilizes filtration. Irregular bubble distribution or increasing pressure loss in the aeration system are early indications of wear or blockage of the diffusers.
Continuous evaluation of operating data is equally important. Transmembrane pressure should always be considered as a trend. A continuous increase indicates increasing fouling, while decreasing flows at constant pressure may indicate membrane aging or process changes.
Another key factor is regular chemical cleaning. Maintenance cleaning at short intervals stabilizes performance, while intensive cleaning as needed restores the original permeability. Correct chemical concentrations, sufficient exposure times, and suitable temperatures are crucial here.
The reliability of the measurement technology should also not be underestimated. Incorrectly calibrated pressure sensors often lead to incorrect assessments of the membrane condition and thus to inappropriate operating decisions.
What else should operators pay attention to when it comes to service life and operational safety?
The membrane reacts directly to the process control. Permanently high solids concentrations, heavy load changes, or unsuitable inlet conditions accelerate fouling and aging and increase the need for cleaning. Pre-treatment therefore plays a central role.
The hydraulic operating limits should also be observed, as excessive pressures can compact the membrane structure and permanently reduce permeability. The same applies to temperatures outside the design range.
In practice, a proactive spare parts strategy has also proven its worth. Critical components such as diffusers, seals, or sensors should be available so that deviations can be responded to immediately.
In summary, I can say that a stable process with clearly defined operating limits is the most effective protection for membrane modules and the most important prerequisite for economical plant operation.
If you would like support in setting up or optimizing your preventive maintenance program, please contact our team.
Get in touch with
Yazan Alrwashdeh
Development and Project Engineer
Phone: +49 3621 73 77 920
E-mail: y.alrwashdeh@wta-unisol.com
Web: www.wta-unisol.com
