2025, Tema 5. Precišcavanje otpadnih voda, pp. 285-288
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Neutralization of wastewater obtained after the cementation process
Neutralizacija otpadnih voda dobijenih nakon procesa cementacije
Project: Ministry of Science, Technological Development and Innovation of the Republic of Serbia (Institution: Mining and Metallurgy Institute, Bor) (MESTD - 451-03-68/2020-14/200052)
Abstract
This study investigates the neutralization of wastewater generated after the cementation process in copper metallurgy. Samples of wastewater were mixed with influent wastewater from the industrial wastewater treatment plant at different ratios (10:1 and 20:1). The mixtures were neutralized with 10% Ca(OH)₂ solution to pH 8.5, followed by the addition of a flocculant. The results demonstrated that the concentrations of copper, zinc, chromium, and iron decreased significantly. For mixtures at a 20:1 ratio, the concentrations of all examined metals were below the prescribed emission limit values (ELVs). The study confirms that neutralization with Ca(OH)₂ is an effective treatment method for ensuring compliance with environmental standards before discharge into natural recipients.
Sažetak
Ovaj rad istražuje proces neutralizacije otpadnih voda koje nastaju nakon cementacije u procesima metalurgije bakra. Uzorak otpadnih voda mešan je sa protočnim industrijskim vodama iz postrojenja za prečišćavanje otpadnih voda u različitim odnosima (10:1 i 20:1). Mešavine su neutralisane do pH 8,5 dodavanjem 10% rastvora Ca(OH)₂, uz naknadno dodavanje flokulanta. Rezultati su pokazali značajno smanjenje koncentracija bakra, cinka, hroma i gvožđa. Kod mešavina u odnosu 20:1, koncentracije svih ispitivanih metala bile su ispod propisanih graničnih vrednosti emisije (GVE). Istraživanje potvrđuje da je neutralizacija Ca(OH)₂ efikasan metod za obezbeđenje usklađenosti sa ekološkim standardima pre ispuštanja otpadnih voda u prirodne recipijente.
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