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Clenviro MATRIX CLF11 Sewage Treatment System (up to 90 person)

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Direct Drainage Reviews

The Clenviro MATRIX CLF11 System is a high-performance wastewater treatment system, designed for treating wastewater from up to 90 people. The system features a unique combination of aerobic and anaerobic treatment technologies, allowing for superior treatment performance. It also includes a settling tank, an anaerobic digester, and a biological filter, ensuring effective and efficient treatment.

  MATRIX Installation Manual

 Clenviro MATRIX Brochure

 Clenviro CLF11 Standard Invert

 Commissioning and Servicing Information


The desludging of your primary, final tank and biozone will differ for these larger systems, this also includes the replacement of the diaphragms in your blowers as many factors need to be taken into account. For proper and accurate advisement please call us on 01388 537050 

The Clenviro Matrix CLF11 will serve up to 90 people

 Domestic use only. For commercial applicants please call us on 01388 537050 so we can discuss your needs appropriately. 

 Access Extensions are available to increase the invert depth at £250 per 100mm, please call 01388 537050 for more information.

Matrix sewage treatment systems are designed to optimise process efficiency, minimise running and maintenance costs and to be as simple and cost effective as possible to install.

Model No/day: CLF11
BOD/day: 5.40 kg
Flow/day: 18m³
Population equivalent: 90 pop
Length: 7360 mm
Width: 2524 mm
Depth: 2174 mm
Standard inlet invert: 600 mm
Weight: 2650 kg
Blower Rating: 0.75 kw


Prices include for blower and discharge pump failure alarms and are for standard inlet inverts, (600mm), duty only blowers and pedestrian duty covers.

Pumped discharges are based on a maximum 3m lift x 100m distance. 

Pump discharge on models CLF1-1A & 2 are duty only. ALL other models are twin pump, duty/standby. Options for deeper inlet invert, higher pump duty and vehicular rated covers are available on request. Prices include delivery to site (customer offload) expect for Scotland and Ireland which are priced individually. Option for HIAB offload is available at additional cost.

This relates to an average efficiency ratio of 96.2%, better than most other manufacturers. As part of the test procedure the MATRIX system was proven to have one of the lowest operating costs. All Matrix sewage treatment plants have a standard inlet invert depth, but in keeping with our commitment to customer satisfaction and to keep installation simple, we can manufacture matrix units to specifically meet site requirements. Integral pumped discharges can also be provided with all units, eliminating the need for additional tankage and installation costs.

All Matrix systems are complete with failure alarms as standard

The Matrix treatment system is a three stage biological process contained within a single tank structure, based on the principles of a submerged bed reactor and designed in accordance with the requirements of BS6297. Careful configuration of the internal flow path and the inclusion of non-mechanical recirculation systems ensures optimal process performance as demonstrated by the exceptional results obtained from the independent testing, providing complete peace of mind. There are NO electrical or mechanical components within the Matrix treatment plant thereby eliminating the need for any specialist servicing arrangements ensuring that any maintenance requirements on the MATRIX system are kept to an absolute minimum.

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