KLARO P-modules are used for simultaneous phosphate precipitation (SBR). A dosing pump in the switch cabinet doses a precipitant directly on start of the aeration phase. This immediately results in good mixing. The precipitant creates an insoluble compound with the phosphate, which settles well in the tank.
The P-module consists of a dosing pump as well as suction and pressure hose. Useful accessories are also available, such as suction aids or drip trays for the jerry can. Polyaluminium chloride is recommended as precipitant. We offer different dosing pumps depending upon your requirements.
The dosing can be set for the runtime of the pump in the KLplus controller or can be adjusted via a speed governor.

  • Discharge values Ptotal = < 1 mg/l
  • Mean value for CE test Ptotal = 0.4 mg/l

Technical data:

Technical data p-module

Balancing of C-deficiency


With the C-module carbon can be injected to the SBR chamber to equalise any deficiency. This can resolve any problems occurring in phases of extreme underload or disadvantageous waste water composition. Thus, for instance, a desired quantity of activated sludge can be kept stable in the system, even if there is no waste water inflow for months. Or else, if there is incomplete denitrification due to a natural C deficiency and excess N, the disadvantageous ratio can be balanced and the clarification target can be achieved.
The C-module consists of a dosing pump with high pumping capacity as well as suction and pressure hose. As C-source, we offer a growth medium that is especially effective (COD ≈ 1,000,000 mg/l), safe and completely biodegradable. Dosing usually takes place in parallel with excess sludge return or recirculation. Other phases are also possible depending upon the use case. The dosing can be set for the runtime of the pump in the KLplus controller or can be adjusted via a speed governor.


Technical data:

Technical data c-module

Disinfection with UV



KLARO UV modules are used for disinfection of biologically pre-treated waste water. The use of ultraviolet radiation (UV) is an effective and user-friendly method. UV light kills pathogenic bacteria within seconds without leaving any residues, harmful by-products, or odours. The module consists of an submersible pump, a UV reactor made of stainless steel and a ballast (starter box). KLARO offers UV systems in various sizes and versions.
The modules are installed in a tank or externally in dry conditions in a machine room. They can be time-controlled and monitored via the controller or a float switch.

  • Discharge values:
    Faecal coliform bacteria
    < 100/100 ml
  • Mean value for CE test:
    Faecal coliform bacteria
    10/100 ml





Technical data:

Technical data UV-module

Disinfection with chlorine



The newly developed KLARO chlorine module represents a sturdier alternative to UV. This disinfection process too is implemented as the 3rd clarification stage after the biological treatment stage. Small doses of a chlorine solution are added selectively to the pumped-off water. Both then flow through a chlorine contact tank which offers sufficient detention time for the disinfection reaction. The application is similar to that in swimming pools. Special features:

  • clear water pump and dosing pump run synchronously; this avoids overdosing
  • extremely effective method with low chlorine consumption and simultaneously high disinfection rate and minimal residual chlorine content in the outflow
  • contrary to UV, chlorine offers a so-called “depot effect”, i.e. the sterilising effect is retained for a longer period.
  • the water can be used for irrigation

The module consists of an submersible pump, a dosing pump and the chlorine tank with inflow baffle plate and drip pan for the jerry can.

  • Discharge values:
    Faecal coliform bacteria < 100/100 ml
  • Mean value for CE test:
    Faecal coliform bacteria 5/100 ml, free chlorine residual content 0.5 mg/l, consumption 1 l chlorine bleach (12,5 %) for 30 m³ wastewater

    Technical data:

    Technical data chlorine-module

    Sludge treatment

    Sludge dewatering module

    Sludge dewatering module:

    The sludge dewatering module is offered for remote and isolated places where sludge removal from site is complicated. Through dewatering and drying of the sludge, the volume and weight are reduced. A flocculant is added to the drawn-off sludge for quick separation. The drying phase begins after the filter bag is full. For that, a hood with fan is drawn over the frame.

    Residual sludge volume after dewatering of 5 m³ activated sludge over a period of 3 months. KLARO One system, KLARO SBR tank system



    Sludge dewatering module

    Technische Daten:

    Technische Daten entschlammungsmodul

    Remote monitoring

    Remote monitoring


    The KLARO WebMonitor® comes in useful whenever highest level of operational reliability and stress-relief of the operator are desired at the same time, . The plant can be monitored by a maintenance firm via a remote diagnostic system. In the event of a fault, intervention is possible immediately from home via internet.

    The KLARO WebMonitor® offers many advantages for the operator and for our partners!

    • higher customer benefit due to monitoring service
    • cost-effective remote diagnosis in the event of a fault
    • higher effectiveness and higher operational reliability
    • optimised service intervals

    KLARO Webmonitor

    Technical data:

    Technical data remote monitoring

    * only in Germany, countries of the EU, Norway and Iceland.

    Grease separators


    In hotels, restaurants and similar places where food is cooked or meat is processed for commercial purpose, the wastewater must be separated from grease with a grease separator. In the KLsepa.pop, KLARO offers a compact grease separator in nominal size (NS) of 1 to 15 in a plastic tank, which can be included upstream of the treatment plant.

    More information: Grease separators

    Grease separator