Construction materials wastes use to neutralize hazardous municipal water treatment sludge

Mymrin, Vsévolod; Hackbart, Fernanda M.; Alekseev, Kirill; Winter, E.E.; Marinho, Gabriel P.; Iarozinski, N. Alfredo; Catai, Rodrigo Eduardo

doi:10.1016/j.conbuildmat.2019.01.182

Cited by 10 publications

(1 citation statement)

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“…consider the applicability of WPS as co-material in the production of ceramic tiles [4]. Sludge solidification and neutralization may involve mixing with waste from lime production and stone polishing residues in order to produce clean construction materials like incombustible bricks and blocks [5]. Ling et al investigated the possibility of using water processing sludge as a substitute for mineral clay [6].…”

Section: Introductionmentioning

confidence: 99%

Processing of Water Treatment Sludge by Bioleaching

Kamizela

Worwąg

2020

Energies

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Biological metal leaching is a technology used in the mining and biohydrometallurgy industries where microorganisms mediate the dissolution of metals and semi-metals from mineral ores and concentrates. The technology also has great potential for various types of metal-rich waste. In this study, bioleaching was used for sludge from water treatment. In addition to checking the applicability of the process to such a substrate, the influence of experimental conditions on the effectiveness of bioleaching of metals with sludge from water treatment was also determined, including sample acidification, addition of elemental sulfur, incubation temperature, and Acidithiobacillus thiooxidans-isolated strain. The measurement of metal concentration and, on this basis, the determination of bioleaching efficiency, as well as pH and oxygen redox potential (ORP), was carried out during the experiment at the following time intervals: 3, 6, 9, 12 days. After the experiment was completed, a mass balance was also prepared. After the experiment, high efficiency of the process was obtained for the tested substrate. The effectiveness of the process for most metals was high (Ca 96.8%, Cr 92.6%, Cu 80.6%, Fe 95.6%, Mg 91%, Mn 99.5%, Ni 89.7%, Pb 99.5%, Zn 93%). Only lower values were obtained for Al (58.6%) and Cd (68.4%).

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Section: Introductionmentioning

confidence: 99%