Kaur, Rajwinder; Roy, Dany; Yellapu, Sravan Kumar; Tyagi, Rajeshwar Dayal; Drogui, Patrick 
ORCID: https://orcid.org/0000-0002-3802-2729 et Surampalli, Rao Y.
(2019).
Enhanced Composting Leachate Treatment Using Extracellular Polymeric Substances as Bioflocculant.
Journal of Environmental Engineering
, vol. 145
, nº 11.
04019075.
DOI: 10.1061/(ASCE)EE.1943-7870.0001584.
Résumé
This study investigates the use of extracellular polymeric substance (EPS), an eco-friendly and biodegradable bioflocculant, for the treatment of composting leachate [raw leachate (BR9) and biologically treated leachate (BB1)]. The removal of chemical oxygen demand (COD) (69% for BR9 and 92% for BB1), phosphorus (92% for BR9 and 94% for BB1) and ammoniacal nitrogen (65.7% for BR9 and 96% for BB1) was higher using a combination of slime-EPS (S-EPS) and FeSO₄ than using slime-EPS alone for both leachates. However, removal of nitrates–nitrites (95% for BR9 and 99% for BB1) and metals (60%–98%) was higher using slime-EPS without the addition of FeSO₄. In all experiments, slime-EPS performed better than broth-EPS (B-EPS). Further optimization of pH (5–9) and incubation time (0.5–12 h) revealed that the maximum removal of COD, phosphate, ammoniacal nitrogen, nitrates–nitrites, and metals was obtained using a slime-EPS concentration of 0.5 g/L0.5 g/L at pH 8 (leachate pH) and 8 h of incubation time. Moreover, the settled solids after EPS treatment produced a slime-EPS of 13 g/L13 g/L in 72 h, which could be used for the treatment of composting leachate.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | biodegradable polymers; chemical oxygen demand; iron compounds; nitrates; nitrogen removal |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 04 déc. 2019 14:51 |
| Dernière modification: | 15 févr. 2022 15:59 |
| URI: | https://espace.inrs.ca/id/eprint/9641 |
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