Fixed or portable skid-mounted KDS separators (left) produce much cleaner, drier and
more easily transported sludge cake.
www.engineeringnews.co.nz 21
One of CST Wastewater Solutions’ latest
innovations to address the needs of small-to-medium
business’ disposal issues is a compact and
portable automatic liquid-to-solid waste separator
that removes more than 50% of the water from
wastewater sludge to provide a 50% reduction in
transportation costs.
The KDS separator uses less than 1kW of
electricity to operate, far less than a centrifuge,
and uses no water during operation unlike a
belt press or a screw press. For a relatively low
investment cost, it offers a high-performance
alternative to sludge drying beds and geobags, for
example, says Mr Bambridge.
Used for thickening of dissolved air flotation
sludge – a very common application throughout
wastewater operations – it achieves solids capture
of 97% thickened sludge at a dryness of 17%.
Waste activated sludge dryness levels are typically
15-25%.
The clog-free automatic technology is suitable for
compact dewatering applications including:
• Abattoir, feedlots, and dairy farm wastewater
and sludge. Cattle manure cake dryness of
25-35% is typically achieved
• Pig farm raw manure and sludge, with cake
dryness of 20-30%.
• Barrel polishing water, water-based paint
wastewater, grease trap waste, dyeing
wastewater, waste oil, and plastic recycling.
• Seafood processing
• Food processing waste, including snackfoods,
kitchen and restaurant waste, raw wastewater
(primary screening) and sludge
• Sewage treatment, including raw wastewater
(primary screening) and sludge to landfill
The unique self-cleaning action of the KDS separator, which is available in
hydraulic capacities from 264-4092 gal/hr with input solids content of 2%
A CST Wastewater Solutions plant incorporating KDS technology is being
installed on World Heritage listed Lord Howe Island.
/www.engineeringnews.co.nz
