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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 7, No. 2, 2010, pp. 281-290
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Bioline Code: st10028
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 7, No. 2, 2010, pp. 281-290
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Application of water pinch technology for water and wastewater minimization in aluminum anodizing industries
Khezri, S. M.; Lotfi, F.; Tabibian, S. & Erfani, Z.
Abstract
This study aims to describe the application of water pinch technology in industrial water consumption
management in aluminum anodizing industry. Water pinch analysis is a systematic technique for designing, optimization
and retrofitting of energy, mass and water recovery networks. The selection of different operations existing in an
industry has an important role in correctness of application of pinch technology. Water usages in anodizing industry are
various, but researches have been shown that, it has the best efficiency on the selection of rinsing chambers to pinch
technology. There are different methods in pinch technology mostly based on mass transfer of single or multiple
contaminants. In this research, a new method is used to select effective contaminant to be applied to pinch analysis.
This research is based on Mann and Liu’s method in single contaminant. But "the guide for classification of raw water,
wastewater and recycled water for industrial and recreation" is chosen to use a complex of index contaminants as a single
contaminant. This method is very simple and applicable for various industrial processes. By an index contaminant like
total dissolved solids, the water usage reduced about 6.7 %. Using pinch technology and this new approach in three
rinsing chambers, water usage reduced about 14.4 %.
Keywords
Aluminum anodizing; Industrial water reuse; Mass transfer networks; Process integration, Water consumption minimization
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