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Klaro Wastewater Treatment
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Klaro Wastewater Treatment

Small wastewater treatment plants

If you are looking for a large household wastewater system or the ability to treat 2,000L/day or more we recommend KLARO wastewater treatment systems.

KLARO systems, supplied and installed by Allflow, offer efficiency, easy maintenance, and an environmentally conscious way to treat wastewater for a single household, communal facility, a community, hotel, or restaurants. KLARO's low maintenance units cater from household size to over 1,000 people (one tank serves up to 10 people). Each individual uses around 150 – 200 litres of water every day, and KLARO systems ensure that water is cleaned and returned to the environment in a sustainable way in harmony with the environment.

Based in Germany, KLARO has more than 300,000 users of its quality systems worldwide that more than comply with New Zealand resource management plans.


What's included

Klaro WW ControllerDomestic wastewater packages include:

Concrete tank

  • 9,000 litre precast concrete tank
  • Treatment capacity sizes up to and exceeding 2,000L/day. Up to 10 people per day can be served by one tank
  • Emergency reserve storage of 2,000 litres
  • Meets EN Std: 12566.3 and Aust/NZ Std: ASNZS1547
  • Various sizes and versions for all loading classes
  • Pre-fabricated and ready-to-use when delivered to the building site
  • Larger systems available

Outdoor control cabinet (see image)

  • Different versions in plastic and concrete
  • Timeless, durable design
  • Can be accessed by maintenance companies at any time
  • No installation work in your home
  • Extremely quiet air compressor - as quiet as a refrigerator
  • Extensive range of accessories available (acoustic and visual warning equipment, sockets, more)
  • Power failure detection as standard
  • Size 37cm x 80cm x 38cm (w x h x d)


Whether you're a single household, an accommodation provider with communal facilities, hotel or restaurant owners, you will find these systems efficient, environmentally safe and easy to maintain. KLARO systems have
  • no mechanics in the wastewater, just an extremely quiet high-performance air compressor in the control cabinet,
  • no pumps in the wastewater, all conveyance is controlled using compressed air (though some applications will require a discharge pump), and
  • no electric parts in the wastewater, unless a discharge pump is required.

Key features

KLARO is an industry leader in the energy efficient SBR Technology used for wastewater treatment. Sequencing batch reactors, or SBRs, use a separate pre-treatment section to mechanically hold back solids and a biological aeration and settling tank. Small SBR wastewater treatment systems clean incoming wastewater over a number of cycles. 

Detailed features include:

Cost effectiveness Power consumption is 0.6 – 1 kW/day for treatment
Safety A comprehensive service network and tested technology ensures your safety
Domestic, commercial, or industrial packages Fully alarmed treatment and discharge monitoring
Underload protection Saving up to 48% in energy costs, the treatment system only operates when there is a sufficient quantity to dose
Maintenance friendly Virtually all maintenance work is performed at the control cabinet
Choice of tanks Concrete or plastic injection moulded tanks comply or exceed the AS/NZ 1546.1:2008 standard
Top discharge values 70-80% lower than those required by law. Provision for phosphate precipitation and UV disinfectant can be incorporated

The KLARO Wastewater System exceeds the requirement set out in AS/NZS 1547:2012 for secondary treatment levels.

How KLARO Wastewater Systems work

KLARO wastewater process diagram-101

Feed phase

First the wastewater enters the sludge reservoir buffer (first chamber), where the solid parts are retained. From there, the wastewater is channelled into the SBR container (second chamber) one portion at a time.

Ventilation phase

The actual biological cleaning takes place in the SBR container. Ventilation and stationary phases alternate as
part of a controlled cleaning process. This creates so called activated sludge with many of microorganisms and thoroughly cleans the water.

Stationary phase

Next is a stationary phase, where the activated sludge sinks to the bottom of the system. This forms a clear water zone in the top part of the SBR container.

Clear water extraction

The cleaned wastewater is then channeled into a discharge system or into an infiltration system. The sludge is extracted back from the SBR container into the first chamber. And then process starts all over again.

Project case studies

Motueka installation for a 96-person accommodation block

Motueka family fruit grower Birdhurst Ltd selected a KLARO wastewater system, designed, supplied, and installed by Allflow’s expert wastewater team, to treat on site wastewater from two new single-level accommodation units on the corner of Staples Street and State Highway 60.

Read the case study on this project with the customer's thoughts about the project.

Check out our video from a key installation day on site to learn more from our YouTube channel.


Marahau DOC centre

When the Department of Conservation (DoC) was looking for an on-site wastewater system in Marahau, at the entrance to the Abel Tasman National Park, Allflow’s expertise in wastewater provided the reassurance the department needed for such a sensitive location. Read the case study about this project.


Download Allflow's PDF brochure with all the details about the KLARO Wastewater System.

Get a quote

Our team has decades of experience in residential wastewater systems.

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About Allflow

Allflow specialises in providing innovative, high quality pumping equipment and vacuum tanker products for industrial requirements that will exceed expectations.

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Contact Information
Phone: 03 543 9057
0800 255 356
58 Gladstone Road
Richmond 7020
New Zealand