M A C H I N E R Y
A clog-free automatic liquid-to-solid waste
separator is being introduced to Australasia by CST
Wastewater Solutions for industrial and municipal
waste water applications such as remote and environmentally
sensitive mining, energy and oil and gas
worksites and far-flung communities.
The compact KDS multi-disc roller separator –
which is being used on pristine Lord Howe Island,
600 km off Australia’s East Coast, for example
– features a unique self-cleaning dewatering and
conveying system with oval plate separation and
transfer structure that prevents clogging and permits
automatic continuous operation that handles oily
and fibrous material with ease.
The two-stage system on Lord Howe uses a
combination of coarse and fine screening and
advanced KDS dry compaction technology to
produce a more hygienic and more compact output
that is easy to handle and transport. The system is
more economical, compact and uses less energy
and minimal water compared to alternative systems,
says CST Wastewater Solutions managing director
Mike Bambridge, whose company has also installed
highly successful Smith and Loveless FAST waste
water treatment plants, on remote mining locations.
The energy-efficient KDS separator is designed
for efficiency, sustainability and conservation
of resources in small-to- medium applications,
consuming as little as 0.06kW hr of electricity and
uses no washwaster, says Mr Bambridge.
“This simple-to-maintain separator offers a high
throughput within a small body, with the smallest
model being just under 350mm wide and weighing
50kg. The compact rotational oval plate structure
achieves high transportation and separation efficiencies,
while the simplicity of the machine’s overall
structure offers low maintenance, achieving cost
and OH&S benefits through less handling being
required to clear hazardous materials.
“The KDS separator uses a fraction of the power of
a centrifuge and no water usage 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.”
Used for thickening of dissolved air flotation
sludge – a very common application throughout
waste water operations – it achieves solids capture
of 97% thickened sludge at a dryness of 17%.
Waste activated sludge dryness levels are typically
Applications for which the separator is designed
include food processing waste, including canteen,
kitchen and community waste, raw wastewater
(primary screening) sewage treatment, including
raw wastewater (primary screening) and sludge
to landfill. It can also be used to process barrel
polishing water, water-based paint wastewater,
grease trap waste, dyeing wastewater, waste oil,
and plastic recycling.
Another alternative: FAST technology
KDS technology complements CST Wastewater
Solutions’ proven range of waste water and effluent
treatment systems, including Smith and Loveless’
FAST technology currently in use with some of
Australia’s major mining enterprises.
The plug-and-play modular Smith and Loveless
FAST (Fixed Activated Sludge Treatment) systems,
for example, are in use at a world class Queensland
outback mining operation to produce an effluent
water quality class of A.
The A grading performance means the water can
be recycled for processes around the site, in accord
with the company’s ethos of improving quality of life
and effectively managing impacts.
The successful installation at this mine (which
cannot be named for commercial confidentiality
reasons) follows previous successful installations
globally at remote locations such as mining and
energy installations and commercial and recreational
facilities operating in areas where water is a
44 March 2018