Cleaner production applications in various industries: metal industry

Abstract

In addition to many environmental issues, including climate change, the relationship between natural resource useand economic growth, and environmental impact and resource use must be reversed for the sustainable managementof rapidly depleted natural resources. Cleaner production techniques enable a framework for identification,adaptation and harmonization for the best available technical (BAT) options in metal industry that aim at improvingenvironmental discharges. Surface finishing, surface processing, surface covering, painting and similar processes areperformed in the metal finishing industry. Although a wide variety of applications for the metal finishing industrycovers cleaner production in Europe and in the world, these studies are limited in Turkey. In this study, it is aimed toevaluate the cooling liquid used in metal surface treatment and waste metal shavings, and to determine economicaland ecological efficiency by determining the best available techniques and technologies. For this purpose, pH,conductivity $NO_{-_2}$, oil-grease analysis were carried out in SAMPA, a local metal processing company. According tothe results of the analysis, the $NO_{-_2}$ value increased until the end of the month over 10 mg $L^{-1}$, and the oil-grease andbacteria formation were also found to be quite high. All these analyzes and stages are determinants for the treatmentand feed line to be established for the extension of the cooling liquid recovery and reuse and cleaner productionpractices will be determined.