There is increasing interest by industry and governments to reuse water. Recirculating water cooled by evaporation in cooling towers is a primary method for meeting process heat removal requirements in petroleum and chemical manufacturing operations. As a result, cooling towers are major consumers of raw water in many refineries and chemical plants. Reusing waste water as cooling tower makeup in place of raw water can achieve a reduction in plant effluent discharge, water use, and contaminant discharge.

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