Open AccessFiltrates and Sludge Generated in the Physicochemical Treatment of Wastewater from the Lead-Acid Batteries Production
Author(s) -
Terese Rauckyte-Żak,
Beata Gorczyca,
S. Żak
Publication year - 2020
Publication title -
environmental engineering
Language(s) - English
Resource type - Conference proceedings
ISSN - 2029-7092
DOI - 10.3846/enviro.2020.675
Subject(s) - toxicity characteristic leaching procedure , lime , leaching (pedology) , wastewater , chemistry , sewage treatment , pulp and paper industry , waste management , environmental chemistry , materials science , metallurgy , environmental science , heavy metals , soil science , engineering , soil water
Total lead (TPb) exists in Crude Wastewater (CW) from production of Lead-Acid Batteries (LABs) in water(WPb) and solid phase (SPb) as colloids and suspended solids.Sludges produced in chemical treatment of these wastewater were dewatered in Chamber Pressure Press (CPP). Samplesof dewatered sludges (Ss) were analyzed with Toxicological Characteristic Leaching Procedure (TCLP) to determineconcentration of Pb in the extract (Ex(TCLP)). Selected sludges were also analyzed using Tessier’s procedure forfractions. Concentration of lead in filtrates (Fs) as well as in the sludges were different, depending on the mechanismsinvolved in converting soluble lead to its less soluble forms. Sludges produced in chemical treatment with 10% NaOHand Lime Milk (LM), CaO or Ca(OH)2, followed by coagulation with (Ixonos Na3T ®) contained lowest concentrationof lead. The TPb in filtrates below 0.4 mg/L at pH > 8.90±0.3, and Ex(TCLP) of less than 5.0 mg/L were obtained inthis treatment. Potential recovery of lead from sludges have been investigated.