Polishing Filter

Sandcel Polishing Filter

The Sandcel comprises of three layers, an upper layer of coarse sand and lower layers of fine sand separated from each other by a thin layer of gravel (supplied by the client) as per Fig. 1.0. The sands used throughout each Sandcel are provided with an independent certification to ensure compliance with the EPA Code of Practice. The Sandcel can be loaded to a maximum of 60 litres per m2 per day.

The Sandcel must be placed on a distribution layer comprising of a 300mm layer of 10mm pea gravel (supplied and placed by the client) as in Fig 2.0. The plan area, calculated by a site assessor, of the distribution layer is dependent on the T value or percolation rate of the receiving subsoil. It is compulsory that the T test is carried out at the infiltration level which is located at the base of 300mm thick distribution layer.



Do you need a new Septic Tank?
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Does your sewage treatment system require maintenance or repair?
Is your percolation area or polishing filter not functioning correctly?

How a Tricel Sandcel works

Sandcel sand polishing filters are designed to the EPA Code of Practice as tertiary treatment systems. These filters are the perfect solution for treatment and disposal of effluent from a secondary treatment unit. The filters comprise of stratified layers of certified sands according to the EPA Code of Practice.

They are enclosed in GRP impermeable panels which will not rot or decay, ensuring the structure of the filter will hold for many years.

The filters can be installed above or below ground with all pipe work accessible from a service pod.

Treatment efficiency

Sandcel filters provide excellent polishing of treated effluent. Sample testing of some sites where a Sandcel and Tricel Novo wastewater treatment plant were in operation have shown final effluent  quality of <1 mg/ltr BOD.

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