Frequently Asked Questions

1. How does the system work


The incoming waste water from the last manhole at site is collected in the pretreatment chamber. First dirt solids settle at the bottom and clearer water is on top. The clearer water overflows into the next chamber known as buffer. The compressed air sensor controls the operation of the air lift pipe which pumps the waste water from the buffer into the reactor (biological cleaning chamber according to requirements depending on the waste water quantity.


The waste water is biologically cleaned through oxygen supply and circulation. The automatic control optimizesaeration through the diffuser disks at the bottom of the reactor chamber. This ensures the bacteria get enough oxygen they require to feed on the organic waste matter the by-product being clean water and Co2.


The heavier bio mass sinks to the bottom during the settling out phase and a “clear water zone” with the cleared waste water forms in the upper region.

Clear water discharge

The reliable air-lift pump takes the cleared water “into the clean water storage chamber or directly into a body of water or for leaching/ soak away.

Automatic excess sludge removal

The biomass generated that settles at the bottom of the reactor chamber, when in excess is automatically returned into the pretreatment chamber, where the cleaning process starts again.

2. Who is the manufacturer

The systems are made in Germany and imported to Kenya for assembly and installation by Ecocycle ltd.

3. Is it smelly&noisy around the installation?

Through optimal aeration achieved by blowing in air from the environment by the blower, this ensures no bad smells around the system. The obnoxious gases that lead to bad smells through alternate sequences of aerating and not aerating are converted to more stable elements that do not smell. The manhole covers are also air tight. A vent pipe is also installed from the tank to release carbon dioxide produced into the atmosphere. The blower the only moving part is designed to produce very low decibels of sound, thus almost a humming sound.

4. Does the system require electricity for operation?

Yes the system requires electricity to operate as the heart of the system is the blower with a motor. The smallest system for 4 to 10 people requires single phase power supply, as the motor is rated at 120 watts. For larger systems the motor rating, 3 phase ranges between 0.75kW to 7.8 kW.

5. Can your system be operated by solar

The system can be solar driven, one just needs to ensure the solar panel rating matches the required motor rating in kW.

6. In case of a power outage what happens

The system can maintain normal operation, despite power outages or failures of upto 72 hours. Beyond that it has to restart again and one may need to call an exhauster to evacuate the excessive sewage from the pretreatment chamber to avoid flooding and spillage.

7. How can the recycled treated water be reused

The treated water is not potable and can only be used for secondary purposes e.g.;- lawn & garden irrigation, flushing toilets, dust suppression, firefighting, car cleaning or cleaning open spaces like car parks.

8. Does one require a tank and can it be plastic?

Yes an underground chambered tank as per our design is constructed, into which we fit in the air lift pipe assemblies and diffusers. We prefer a reinforced concrete or masonry tank as it is easier to achieve the required partitions that way. Poor quality plastic tanks are also susceptible to damage in areas with black cotton soil, and high levels of water saturation.

9. What is the space requirement

The space required depends with the size of the system needed though it can be adjusted according to the space available. The smallest system for between 4- 10 people requires a space of 5m x 1.4m by 1.7m.

10. Does one need to separate the kitchen and toilet water

Our system requires no separation of the waste. It collects all the waste from the house including kitchens, bathrooms and the toilets i.e both black and grey. This mix ensures an optimal bacteria population which is needed for the treatment process.

11. How often do one need to de-sludge/empty the tank

As per the manufacturers recommendation after 5 years. From experience with the running installations in Kenya, it can be between 3-5 years depending on the discipline of the population at premises. If they dump non- degradable materials into the toilet drainse.gploythene that means the pretreatment will fill up faster and will need to be exhausted sooner

12. Is the system listed by NEMA

Yes, the system is listed and acknowledged by NEMA.

13. What is the quality of the treated water

Our system produces high quality water exceeding NEMA standards and requirements for re-use and discharge into the environment. NEMA is the mandated body in Kenya to approve the quality.

14. How long will I have to wait for delivery

After down payment the client will wait for 4-6 weeks for the equipment to be assembled and delivered to site. The waiting period is enough to be constructing the required chambered tank, so upon arrival installation is executed immediately.

15. What about warranty, service and maintenance

We give our customers a one year warranty whereby we do the maintenance and servicing for free after which they are always encouraged to subscribe to a maintenance contract

16. What is the smallest system available

The smallest system we have is known as Klaermax 10PE which can treat waste water for up to a maximum of ten people.

17. Does your system allow expansion in case the construction is in phases

The system can be modular, hencepossibility to install in phases as the population increases however the client must tell us the estimated final population to assist in the design of the required overall tank.

18. Does your system have pumps

Our system requires no pumps and instead uses air lift principle to transfer the water from one chamber to the other.

19. Air lift pump versus electric pump: What are decisive criteria for both options?

Whether it is an ordinary pump or an airlift pump, both are there to keep the waste water moving in the SBR tank. Sewage is a very “aggressive” medium (both corrosive and abrasive) in that these components operate where they are exposed to chemical reactions which cause both abrasion and corrosion. The electric submersible pumps very often used in SBR plants have three serious drawbacks: they show far more wear and tear on account of these chemical influences, they require intensive maintenance, since they can become entwined and through contact with the gases in the container they require reliable explosion protection. Klaermax Air XL uses Mammut principle that work without an electronic drive unit in the tank, operating virtually clog-free because they contain no moving parts and on account of the highquality plastics guarantee a long service life in sewage treatment.

20. Do you have operational plants and can interested clients view them

We have several operational sites of different sizes. Interested clients can always view any of our operational plants and we would have to make plans of when and which kind of a system they would like to see.

21. How far from the building should the system be sited

Our system can be sited anywhere in the compound since we don’t render spaces unusable, and no bad smells are produced.

22. What information Ecocycle require in order to design and quote a wastewater treatment plant

For us to decide on what design to offer our client we need to know the occupancy of the house or development that is the estimated number of people who will occupy the said development.