CHARACTERIZATION OF THE SLUDGE OF IBN ZIAD CONSTANTINE SEWAGE TREATMENT PLANT FOR ITS LANDSPREADING

• Main Authors: WASSILA CHEURFI, HASSINA BOUGHERARA, BRAHIM KEBABI
• Format: Article
• Language: English
• Published: Alma Mater Publishing House "Vasile Alecsandri" University of Bacau 2016-04-01
• Series: Scientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry
• Subjects: element trace; landspreading; sewage treatment plants; sludge
• Online Access: http://pubs.ub.ro/?pg=revues&rev=cscc6&num=201601&vol=1&aid=4356

The purpose of this study was to determine the content of metals elements in the sludge of Ibn Ziad sewage treatment plant of Constantine in order to preserve its quality for subsequent use in agriculture. The use of X-ray fluorescence spectroscopy allowed us to identify the following constituents in this mud: Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn Fe, Ni, Cu, Zn, Ga, As, Se, Br, Rb, Sr, Y, Zr, Ba, Pb. These elements represent 49.82 % of the total mass of the sludge. The elements present with regulated content limit are chromium, copper, nickel, lead and zinc. They occur respectively with the following concentrations: 0.27 mg·g-1, 0.48 mg·g-1, 0.11 mg·g-1, 0.35 mg·g-1 and 2.70 mg·g-1. We have achieved an extraction for evaluating the concentration of the dissolved nitrate ions, the chemical oxygen demand (COD), and pH. The nitrate ions were transformed into sodium paranitrosalicylate to be dosed by ultraviolet-visible (UV-Vis) spectroscopy at 420 nm. The concentration measured was 0.12 mg·g-1. The measuring of the COD issued a value of 0.45 mg·g-1. pH was 7.1.