Non-planted filter

Pre-treated greywater is applied intermittently to the surface of a filter media, percolates through an unsaturated filter zone where physical, biological and chemical processes treat the water. The treated greywater is collected in a drainage network or infiltrates the underlying soil.

Synonyms and Abbreviation
subsurface biofilters
percolation beds
infiltration beds
intermittent sand filters
unplanted filter

Non-planted filter

Pre-treated greywater is applied intermittently to the surface of a filter media, percolates through an unsaturated filter zone where physical, biological and chemical processes treat the water. The treated greywater is collected in a drainage network or infiltrates the underlying soil.

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