10
Sep
2008
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Upgrading of the SCADA System

The previous SCADA system had been in operation from 2003 and had been running on 3 independent servers. No hardware or software upgrades have been performed on the system since inception, the documentation on the system was almost non-existent and Midvaal Water has lost its expertise level on the SCADA System with the tragic death of the previous Engineering Manager during 2006.

The SCADA system forms the heart of the Control and Monitoring of all the operations and it was therefore decided to upgrade the system such that the Company that provided theSCADA software, will form the expertise support level to the system and that a generalist support level for the system will be developed in-house.

The upgraded system now runs on two servers, configured to provide full system redundancy, in case any of the servers fail.

10
Sep
2008
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Upgrading of the IT System

The upgrading of the IT Network has been successfully completed and the results obtained are very satisfactory. This includes a proper intranet with the necessary securities, automatic backup system, centralised and automated virus updating, proper firewall for connection to the outside world and proper e-mail system. The upgrade now enables remote expert support from outside companies on the IT-Network, Financial System, SCADA System, etc.

This also included the implementation of a dedicated radio link between the Head Office and a Telkom exchange in Klerksdorp that enables an ADSL Communication Link from the Company premises to the outside world.

10
Sep
2008
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Hydraulic Modelling of the Distribution Network Phase 1

The water distribution network of Midvaal Water Company allows water take-off points to the different consumers which vary in position and withdrawal rates. Different combinations of simultaneous supplies to these customers affect the system curve in different ways, forcing the pump sets to operate away from their Best Efficiency Points (BEP). This not only has an impact on electrical energy consumption, but also on the wear of the pump sets.

A hydraulic model of the distribution system has been developed to analyse the system with regards to the following:

  • The effects of adding new consumers on the system.
  • The effects of changed consumer draw-off patterns.
  • The effects if certain equipment (pumps and/or pipelines) is taken out of operation for maintenance purposes.
  • The effects of the different pump combinations.
  • Verification of the correct pump applications.
  • Predictability in terms of maintenance and expected lifespan of equipment.
  • This tool will also be used to define refurbishment/replacement plans of pipelines/pipe sections, pumps, etc.
  • Determination of dead zones within the system.
  • Application of air valves to minimise water hammer and to get rid of air that acts as a restriction
  • Optimising the ESKOM Time-of-Use (TOU) tariff system to maximise electrical energy savings without damaging pump sets.
10
Sep
2008
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Construction of a Pre-Ozone Reactor

The replacement of the Ozone Generation Equipment included the construction of an Ozone Reactor at the beginning of the treatment facility. This will enable Pre-Ozone treatment as an additional step in the treatment process in an effort to improve the qualityof the potable water that is becoming more and more difficult to achieve in the wake of persistent deterioration of the quality of the raw water. It is also hoped that the enhanced ozonation will help to reduce taste and odour problems associated with specific algae in the river water.

The project will be completed during the second quarter of 2008.

12
Oct
2006
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Twinning Agreements

During 2006, a Memorandum of Understanding (MOU) was signed with the Oslo water and Sewerage Works, Norway, as part of the drive to have suitable twinning arrangements for sharing experiences and expertise in the mutual interest of the two organisations,. Another MOU was signed with Mulonga Water and Sewerage Company, Ltd., Zambia for similar objectives. A third MOU was signed in 2011 with Bloem Water based on mutual intent on a variety of common issues.

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