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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Enrichment of Autotrophic Denitrifiers From Anaerobic Sludge Using Sulfurous Electron Donors

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Author(s):
Carboni, M. F. [1, 2] ; Florentino, A. P. [1, 2] ; Costa, R. B. [3] ; Zhan, X. [4] ; Lens, P. N. L. [1, 2]
Total Authors: 5
Affiliation:
[1] Natl Univ Ireland Galway, Sch Nat Sci, Dept Microbiol, Galway - Ireland
[2] Natl Univ Ireland Galway, Ryan Inst, Galway - Ireland
[3] Sao Paulo State Univ, Dept Biochem & Organ Chem, Inst Chem, Araraquara, SP - Brazil
[4] Natl Univ Ireland Galway, Sch Engn, Dept Civil Engn, Coll Sci & Engn, Galway - Ireland
Total Affiliations: 4
Document type: Journal article
Source: FRONTIERS IN MICROBIOLOGY; v. 12, JUN 7 2021.
Web of Science Citations: 1
Abstract

This study compared the rates and microbial community development in batch bioassays on autotrophic denitrification using elemental sulfur (S-0), pyrite (FeS2), thiosulfate (S2O32-), and sulfide (S2-) as electron donor. The performance of two inocula was compared: digested sludge (DS) from a wastewater treatment plant of a dairy industry and anaerobic granular sludge (GS) from a UASB reactor treating dairy wastewater. All electron donors supported the development of a microbial community with predominance of autotrophic denitrifiers during the enrichments, except for sulfide. For the first time, pyrite revealed to be a suitable substrate for the growth of autotrophic denitrifiers developing a microbial community with predominance of the genera Thiobacillus, Thioprofundum, and Ignavibacterium. Thiosulfate gave the highest denitrification rates removing 10.94 mM NO3- day(-1) and 8.98 mM NO3- day(-1) by DS and GS, respectively. This was 1.5 and 6 times faster than elemental sulfur and pyrite, respectively. Despite the highest denitrification rates observed in thiosulfate-fed enrichments, an evaluation of the most relevant parameters for a technological application revealed elemental sulfur as the best electron donor for autotrophic denitrification with a total cost of 0.38 euro per m(3) of wastewater treated. (AU)

FAPESP's process: 18/01524-7 - Assessment of sugarcane bagasse as a slow electron donor for sulphate reduction coupled to metal recovery from acid mine drainage
Grantee:Rachel Biancalana Costa
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor