In 2006 Christiaens Group has started to extend the existing SESA SpA composting
facility located in Este.The extension comprises the construction of 4
new tunnels and the modification of 10 bunkers.The newly built tunnels are 8
meters wide and 56 meters long. These tunnels are equipped with the same
robust air handling system as Christiaens Group is known for. The modified
bunkers are converted into tunnels which makes it possible to recirculate the
air and by doing so minimizing the amount of air to be exhausted.
The plant itself is very diverse. It contains, next to the composting tunnels, an
anaerobic digestion plant where they convert different types of waste of
organic origin into energy. Next to this, SESA is currently construction a waste
water treatment plant on the Este site in order to purify all the different
streams of waste water before discharge.
SESA SpA (Este Environmental Services Company) is a partly governmental
partly private owned waste treatment plant. The plant consists of anaerobic
digestion systems, 9 tunnels for green waste composting, 20 tunnels for
composting of kerb-side collected waste and a water treatment plant.
The plant currently converts over 300.000 tonne of organic waste per year
into electricity, heat and compost. Electricity is produced at a continuous
rate of 4MW and fed into the grid. The heat is used for district heating of for
example the local school and hospital. Furthermore a significant amount of
compost is produced (totally indoors), to be used for agricultural soil
improvement up to the highest quality for horticultural use.
Currently the amount of Combined Heat and Power units is increased, so the
produced heat and electricity will increase even more in the near future.
In 2006 Christiaens Group has extended SESA SpA composting facility.
The extension comprised of the construction of 4 new tunnels and the
modification of 10 bunkers. The newly built tunnels are 8 meters wide and 56
meters long. These tunnels are equipped with the same robust air handling
system where Christiaens Group is well known for. The modified bunkers
are converted into tunnels which make it possible to recirculate the process
air, minimizing the amount of air to be exhausted. Hence, the amount of air
treatment system and biofilter area required is less.
In 2009 the Christiaens Group has renovated the control system for 20
tunnels, involving plc’s, servo’s, frequency converters and sensors. This was
required in order to meet the latest standards.
The challenge for this renovation was the requirement to keep the plant fully
operational during the changes. There was no possibility of carrying out this
work during a plant shutdown. After several weeks of intensive preparation
the change to the new control and communication system successfully took
place during a single day.
Besides air handling equipment and controls, SESA SpA is a respectable client
of our machinery department. Demanding high quality machinery which
works in harsh conditions 24/7 has resulted in delivering numerous hoppers
and conveyors during the years.