# WASTE WATER TREATMENT SYSTEM - from 660 Filtered, multi-tank anaerobic digesting system suitable for secondary irrigation Component Costs - 1 x 50l inside 1 x 70l for solids separation - 1 x 100l primary settling tank - 1 x 100l anaerobic course gravel filtration tank, - 1 x 100l anaerobic wood chip nitrogen reduction tank, - 1 x 100l anaerobic fine gravel filtration tank, - 1 x 100l anaerobic volcanic stone filtration tank, - 1 x 100l anaerobic fine sand filtration tank, = 6 x 100l tanks with lids (150) + 1 x 50l tank (15) + 1 x 70l tank with lid (20) - 5 x 50cm vertical tubes (25) - 5 x 30cm connecting tubes (25) - 5 x 90deg tube connectors (25) - supply and installation (300) - filter aggregates and wood chips (50) FLUSH TOILET SYSTEMS - from 510 # Component Costs - toilet, (150) - cistern, (60) - waste and water supply fittings, (50) - toilet base. (50) - installation (200) # Construction Notes: - the toilet base is a piece of galvanised steel open mesh panel, infilled with wood battens or pebbles mixed with mortar.