Scaling and corrosion associated with the use of natural hard water in cooling towers during recirc

Aiman Al-Rawajfeh
Scaling and corrosion associated with the use of natural hard water in cooling towers during
recirculation pose great problems from both economical and technical points of view, such as
decreased system efficiency and increased frequency of chemical cleaning. Treated municipal
wastewater (MWW) is a promising alternative to freshwater as power plant cooling system makeup
water, especially in arid regions. In this work, hybrid systems of salt precipitation (SP),
nanofiltration (NF) and reverse osmosis (RO) were investigated, as potential pretreatment processes
for wastewater reuse as cooling water in the planned Jordan nuclear power plants. The As-Samra
wastewater was used to calculate the potential of carbonate and sulfate scale formation. The results
were compared to scale potentials from Palo Verde wastewater. Four cases were investigated; SP,
NF, SP-RO and NF-RO. The SP pretreatment cases showed the highest monovalent to divalent ratio
because of a high removal of Ca and Mg and addition of Na from the chemicals of the SP step. The
NF pretreatment cases, showed the lowest calcium sulfate scale potential and this potential decreases
with the % pretreatment. The scale amount increases very slightly with concentration times when
the SP and NF product is desalinated by RO step.
Water Network Research
Water Network Research Thanks Proff. Aiman for sharing the original research paper, we have uploaded this paper in "Industrial Waste Water Desalination" group library
Leonardo Zanata
Leonardo Zanata looks a very good work. thanks for share. Regards.
Aiman Al-Rawajfeh
Aiman Al-Rawajfeh Thanks for your nice words. I will answer the questions and submit the open access papers.
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