Quality Parameters of Offset Printing Wastewater
Samples of tap and wastewater were collected in three offset printing facilities in Novi Sad, Serbia. Ten physicochemical parameters were analyzed within all collected samples: pH, conductivity, m - alkalinity, p - alkalinity, acidity, carbonate concentration, hydrogen carbonate concentration, active oxygen content, chloride concentration and total alkali content. All measurements were conducted using the standard analytical and instrumental methods. Comparing the obtained results for tap water and wastewater, a clear quality difference was noticeable, since all physicochemical parameters were significantly higher within wastewater samples. The study also involves the application of simple linear regression analysis on the obtained dataset. By using software package ORIGIN 5 the pH value was mutually correlated with other physicochemical parameters. Based on the obtained values of Pearson coefficient of determination a strong positive correlation between chloride concentration and pH (r = -0.943), as well as between acidity and pH (r = -0.855) was determined. In addition, statistically significant difference was obtained only between acidity and chloride concentration with pH values, since the values of parameter F (247.634 and 182.536) were higher than Fcritical (5.59). In this way, results of statistical analysis highlighted the most influential parameter of water contamination in offset printing, in the form of acidity and chloride concentration. The results showed that variable dependence could be represented by the general regression model: y = a0 + a1x+ k, which further resulted with matching graphic regressions.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1125581Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1296
 P.S. Gholami, S. Gholami, P. Nassiri, R. Yarahmadi, A. Hamidi, and R. Mirkazemi, “Assessment of Health Safety and Environment Management System function in contracting companies of one of the petro-chemistry industries in Iran, a case study,” Safety Sci., vol. 77, pp. 42–47, June 2015.
 R. Schulz, M. Bundschuh, R. Gergs, C. A. Brühl, D. Diehl, M. H. Entling, L. Frör, H. F. Jungkunst, A. Lorke, R. B. Schäfer, G. E. Schaumann, and K. Schwenk, “Review on environmental alterations propagating from aquatic to terrestrial ecosystems,” Sci. Total Environ., vol. 538, pp. 246–261, December 2015.
 T.F. Cuffney, J.G. Kennen, and I.R. Waite, “Aquatic Ecosystems as Indicators of Status and Trends in Water Quality,” Comprehensive Water Quality and Purification, vol. 1, pp. 122–156, November 2014.
 Z. Wen, J. Di, and X. Zhang, “Uncertainty analysis of primary water pollutant control in China's pulp and paper industry,” J. Environ. Manage., vol. 169, pp. 67–77, March 2016.
 L. Chen, X. Ding, and X. Wu, “Water Management Tool of Industrial Products: A case study of screen printing fabric and digital printing fabric,” Ecol. Indic., vol. 58, pp. 86–94, November 2015.
 J. Kiurski, Register of pollutants in printing industry of Novi Sad (1st ed.) Novi Sad: Faculty of Technical Sciences, University of Novi Sad, 2010. (in Serbian)
 J. Kiurski, B. Marić, D. Adamović, A. Mihailović, S. Grujić, I. Oros, and J. Krstić, “Register of hazardous materials in printing industry as a tool for sustainable development management,” Renew. Sust. Energ. Rev., vol. 16, pp.660–667, January 2012.
 L. Andrade, C. Míguez, M. Gomez, and P. Bugallo, “Management strategy for hazardous waste from atomised SME: application to the printing industry,” J. Clean. Prod., vol. 35, pp. 214–229, November 2012.
 J. Kiurski, I. Oros, N. Ralević, and J. Stefanov, “Statistical methods as indicator of offset printing wastewater quality,” Stoch. Env. Risk A., vol. 29, pp. 1709–1720, August 2015.
 N. Vuković, Statistical conclusion, (1st ed.) Belgrade: Faculty of Organizational Sciences, University of Belgrade, 2007. (in Serbian)
 Howard J. Seltman (2009) Experimental Design for Behavioral and Social Sciences, On- line Textbook Available at: http://www.stat.cmu.edu/~hseltman/309/Book/chapter9.pdf Accessed: 28.12.2015.
 Water Law of the Republic of Serbia, Official Gazette of the Republic of Serbia, 30/10,67/11, 48/12; 2010, 2011, 2012. (in Serbian)