The potential for the recovery and reuse of cooling water in Taiwan

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Title:	The potential for the recovery and reuse of cooling water in Taiwan
Authors:	You,SH;Tseng,DH;Guo,GL;Yang,JJ
Contributors:	環境工程研究所
Keywords:	SYSTEMS;SCALE
Date:	1999
Issue Date:	2010-06-29 18:21:13 (UTC+8)
Publisher:	中央大學
Abstract:	The cooling water is the major part of industrial wateruse in Taiwan, either from the view of demand priority or supply volume. In order to save water, the loading of supply system can be reduced if the cooling water can be recovered and reused. For this reason, exploration of the recent operation status of the cooling water system has become essential in Taiwan. This study was initially focused on the current applications and reuse trends of cooling water in oil refineries, chemical industry, steel mills, food industry, electronics works, textile plants and power stations. According to the statistical analysis, the portable water and groundwater are the primary sources of makeup water for cooling systems. The multiple-chemicals method and makeup treatment are increasingly accepted for the reclamation of cooling water. On the other hand, sidestream treatment and blowdown reuse are not popular in Taiwan. The recovery rate of blowdown is only 26.8%. The fact of higher cost is the major reason to depress the willingness of recovery. Some representative plants had been selected for case study. However, most cooling water systems are only operated by operator's experience according to field investigation. In each case, the water quality indexes were used to evaluate the operational condition of cooling water systems. There was no case plant found to be operated at appropriate cycles of concentration. This paper also presented the bottlenecks of conservation technologies of cooling water in Taiwan. These bottlenecks include increasing the cycles of concentration, the reuse of wastewater, and the blowdown treatment for reuse. This paper also demonstrates that the recovery and reuse of cooling water has great potential and is feasible for the available technologies in present Taiwan, but the industries are still unwilling to upgrade because of initial cost. Finally, some approaches associated with technology, economics, environment and policy are proposed to be a reference for the industries and the government authorities. (C) 1999 Elsevier Science B.V. All rights reserved.
Relation:	RESOURCES CONSERVATION AND RECYCLING
Appears in Collections:	[Graduate Institute of Environmental Engineering ] journal & Dissertation

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