Abstract
It is estimated that some 17 metric tons of residual oxidants (chlorine) are discharged into the enclosed coastal seawater of Kuwait on a daily basis from power-desalination plants alone. Alarmed by the unlimited number of reported cases of damage to marine aquatic systems due to chlorine discharge around the world, several alternatives were proposed to control such a massive discharge of residual oxidant into seawaters. Most of the proposed alternatives lacked the basic criteria necessary for their evaluation, justification, and then selection.
The objective of this article is to provide a conceptual approach that can be used to select a control measure for residual oxidant discharge in Kuwait coastal seawaters. This approach is based on state-of-the-art knowledge and the unique operational and environmental factors involved. A matrix system was designed whereby the cost of residual chlorine control alternative, its effectiveness, and environmental and public health impact, performance, and reliability in Kuwait can be compared and evaluated. The selection approach considered currently operating power plants in terms of their engineering design and material (cast iron or steel condensers), current operational conditions, operator's perception, acceptability, and projected problems associated with the environmental management of proposed modifications.
The proposed approach revealed that in Kuwait, conventinal chlorination was marginally superseded only by chlorination/dechlorination using SO2 and operation alteration using process optimization. The overall cost-effective assessment matrix classified other alternatives as worse than chlorination by various degrees.
Ozone and UV were found to be the worst and the least desirable alternatives for biofouling control of seawater in Kuwait.
In light of the available information on the consequences of the Gulf War on the marine environment, and the potential formation of additional halogenated organic compounds through the reaction of residual chlorine with the released petroleum hydrocarbons, it is essential to control residual chlorine discharged into the nearshore environment of Kuwait.
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Khordagui, H.K. A conceptual approach to selection of a control measure for residual chlorine discharge in Kuwait bay. Environmental Management 16, 309–316 (1992). https://doi.org/10.1007/BF02400069
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DOI: https://doi.org/10.1007/BF02400069