13
Bosch Stemele appointed
to upgrade Groendal
Water Treatment Works
Bosch Projects sets
records in Thailand
The Nelson Mandela Bay Municipality (NMBM), located
within the Cacadu District Municipality, is the Water Service
Authority (WSA) for the area encompassing Port Elizabeth,
Uitenhage and Despatch. Groendal Water Treatment Works
(WTW), situated on the outskirts of Uitenhage, supplies
potable water to Uitenhage and surrounding areas. NMBM
recently appointed Bosch Stemele as the consultants
responsible for the much-needed upgrading of Groendal
WTW.
The objective is to streamline operations of the existing
Groendal WTW in order to maintain a sustainable potable
water supply for the community by employing the following
tactics:
Khon Kaen Sugar 20 000 tcd chainless bagasse diffuser.
• Refurbishing existing items that require repair or
maintenance
• Upgrading the existing system by installing additional items
required for improved functionality
• Modernising by installing new equipment with the latest
technology; and
• Automation of the treatment works.
The complete project will be rolled out in two phases, of which
the first phase was completed in July 2014, with the second
phase due to commence in July 2015. This comprises of the
refurbishment and upgrading of the raw water inlet, filter
building, sedimentation tanks, sludge and backwash tank,
pump station, pipework, sewers and roads. Completion of the
project is expected within eight months.
Rowan Bode - [email protected]
Khon Kaen Sugar chainless diffuser hydraulic driver.
Khon Kaen Sugar, in Thailand, is currently operating one
of Bosch Projects chainless diffusers, specifically built as a
bagasse diffuser at 16.5m wide, this is the widest diffuser ever
constructed. Bosch Projects designed this chainless diffuser
in 2013 and commissioning was completed at the end of their
2013/14 crushing season.
In December 2014 Bosch Projects’ Sugar division went to
Thailand to conduct performance tests and monitor the
diffuser as it reached its required capacity of 20 000 tons cane
per day.
The backwash pumps, valves and pipework will be replaced along with
the installation of an electric actuator and submersible sludge pump.
This Sedimentation Tank is to be refurbished and new valves installed
and automated.
The 2014/15 season got off to a flying start and within a few
days, the diffuser was achieving its design capacity. On the 25th
December 2014 the diffuser officially passed the performance
guarantee tests, averaging a season extraction of 96.6% at an
effective throughput of over 833 tons cane per hour.
Subsequent performance optimisation carried out by Bosch
Projects in February saw the diffuser crush 21 082 tons of cane
in a single day while maintaining an extraction of over 96%.
This is over 1 000 tons more than the design capacity. This is
the second highest daily crush ever achieved through a single
diffuser, the highest being 21 632 tons achieved by the 15m
wide Bosch Projects chainless diffuser in Jatai, Brazil.
The diffuser is currently achieving effective throughputs
of around 900 tons cane per hour, which would equate to
daily throughputs of over 21 600 tons a day. This is a great
example of the flexibility and robust quality of Bosch Projects’
equipment, being able to maintain performance at maximum
design capacity.
Paul Hamilton – [email protected].