Autotrophic denitrification supported by sphalerite and oyster shells: Chemical and microbiome analysis - Aix-Marseille Université Access content directly
Journal Articles Bioresource Technology Year : 2023

Autotrophic denitrification supported by sphalerite and oyster shells: Chemical and microbiome analysis

Erica Dasi
Jeffrey Cunningham
Emmanuel Talla
Sarina Ergas

Abstract

This research evaluated the metal-sulfide mineral, sphalerite, as an electron donor for autotrophic denitrification, with and without oyster shells (OS). Batch reactors containing sphalerite simultaneously removed NO3− and PO43− from groundwater. OS addition minimized NO2− accumulation and removed 100% PO43− in approximately half the time compared with sphalerite alone. Further investigation using domestic wastewater revealed that sphalerite and OS removed NO3− at a rate of 0.76 ± 0.36 mg NO3−-N/(L · d), while maintaining consistent PO43− removal (∼97%) over 140 days. Increasing the sphalerite and OS dose did not improve the denitrification rate. 16S rRNA amplicon sequencing indicated that sulfur-oxidizing species of Chromatiales, Burkholderiales, and Thiobacillus played a role in N removal during sphalerite autotrophic denitrification. This study provides a comprehensive understanding of N removal during sphalerite autotrophic denitrification, which was previously unknown. Knowledge from this work could be used to develop novel technologies for addressing nutrient pollution.
Fichier principal
Vignette du fichier
BITE-D-23-00519_R2.pdf (2.33 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-04028017 , version 1 (09-10-2023)

Identifiers

Cite

Erica Dasi, Jeffrey Cunningham, Emmanuel Talla, Sarina Ergas. Autotrophic denitrification supported by sphalerite and oyster shells: Chemical and microbiome analysis. Bioresource Technology, 2023, 375, pp.128820. ⟨10.1016/j.biortech.2023.128820⟩. ⟨hal-04028017⟩

Collections

CNRS UNIV-AMU
29 View
9 Download

Altmetric

Share

Gmail Facebook X LinkedIn More