All waste entering the Facility is screened at a pre-sort station to
remove any hazardous and toxic incompatible materials (such as gas
cylinders and batteries). A front-end separation process achieves
the dual purpose of maximising resource recovery of paper, glass,
metals and plastics and at the same time upgrading the organics
stream to enable recovery at the highest net resource value (HNRV).
The upgraded organics stream is fed to the ISKAŽ
Percolation process to homogenise the waste and generate biogas to
make the facility more than energy self-sufficient, and to remove
fine glass, grit and other contaminants. After primary refining
(screening by trommels) the solid organic streams are composted
using fully enclosed, automated Sorain Cecchini Tecno (SCT)
technology.
The SCT enclosed composting process composts the
solid organic fraction over an initial four week period under highly
controlled conditions of turning, transport, watering and aeration
to produce a stabilised, pasteurised compost material which is ready
for maturation.
After eight weeks’ maturation on an external
aerated static pile with intermittent turning, the organic growth
medium (OGM) is ready for refining. A secondary refining system
using Hamatech and Contech technology with densiometric, aerodynamic
and screening unit operations further refines the compost to remove
stones, glass and light plastics and produce an OGM product suitable
for agricultural, soil blending and other growing media
applications. Three OGM products are manufactured at Eastern Creek –
OGM-C and OGM-P for agricultural and soil blends, and RRO for soil
remediation and rehabilitation applications.
OGM is product certified under AS4454 for
Composts and Soil Conditioners. It is subjected to rigorous quality
control and comprehensive batch testing to produce safe, reliable,
clean and consistent product. OGM is currently being used in soil
blends for landscaping applications and agricultural trials.
