M. Tech. (Department of Chemistry, Faculty of Applied and Computer Sciences), Vaal University of Technology, 2016 / Natural organic matter if not removed from water used for electricity generation has
dire consequences that affect the long term plant health. The main problem is that
organic matter at higher temperature and pressure disintegrate into smaller organic
acids and carbon dioxide. This causes the cycle water and steam to be acidic and
this can result in corrosion of the plant.
The raw water from the Komati (Arnot power station) and Usutu (Kriel power station)
scheme were analysed to determine the organic profile and seasonal variation.
There was a noticeable variation in the quality of the water with an increase in DOC
during rainy season. The water was found to be containing hydrophobic as well as
hydrophilic molecules that could be quantified with a liquid chromatography organic
detector (LC-OCD).
Current water treatment processes employed at the two stations, Arnot and Kriel,
has demonstrated the capability of removing organics to just over 50 percent at the
pre-treatment section. The water treatment plant includes demineralisation plant that
was able to produce water that met Eskom’s target specifications of less than 250
ppb DOC values.
Qualitative and quantitative analysis of the steam-condensate water was done by
use of an ion chromatography method. The determined organic anions were found to
be acetates, formats and lactates.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:vut/oai:digiresearch.vut.ac.za:10352/319 |
| Date | 06 1900 |
| Creators | Pule, Keikantse Moses |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | xiii, 129 leaves: illustrations |
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