Accelerating bauxite residue remediation with microbial biotechnology

T. C. Santini, K. Warren, M. Raudsepp, N. Carter, D. Hamley, C. McCosker, S. Couperthwaite, G. Southam, G. W. Tyson, L. A. Warren

Research output: Chapter in Book/Conference paperConference paper

Abstract

Biological neutralisation of pH, driven by the microbial fermentation of added organic carbon substrates such as glucose, has recently emerged as a promising technique for remediation of bauxite residue, dropping pH from >11 to <8 in five days. Here, we report on a glasshouse experiment combining this novel microbially-driven pH neutralisation technology with other existing (abiotic) remediation approaches, including addition of gypsum, sewage sludge, and irrigation. Scaling up the bioremediation treatment by three orders of magnitude from previous laboratory trials to these glasshouse trials was successful. Adding bioremediated residue (5 cm thick) at the residue surface significantly enhanced pH neutralisation to depth, decreasing pH from 13 to ~10 as far as 25 cm below the residue surface. Increasing irrigation and tillage frequency accelerated salt removal. Combining our microbial bioneutralisation treatment with fortnightly tillage and daily irrigation provided the best opportunity to rapidly decrease pH and salinity, and is currently being trialled at field scale.

Original languageEnglish
Title of host publicationLight Metals, 2019
EditorsCorleen Chesonis
Place of PublicationUSA
PublisherSpringer International Publishing AG
Pages69-77
Number of pages9
ISBN (Electronic)978-3-030-05864-7
ISBN (Print)9783030058630
DOIs
Publication statusPublished - 2019
EventLight Metals Symposium held at the TMS Annual Meeting and Exhibition, 2019 - San Antonio, United States
Duration: 10 Mar 201914 Mar 2019

Publication series

NameMinerals, Metals and Materials Series
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Conference

ConferenceLight Metals Symposium held at the TMS Annual Meeting and Exhibition, 2019
CountryUnited States
CitySan Antonio
Period10/03/1914/03/19

Fingerprint

Aluminum Oxide
Biotechnology
Remediation
Irrigation
Salt removal
Calcium Sulfate
Bioremediation
Gypsum
Sewage sludge
Organic carbon
Fermentation
Glucose
Substrates
Experiments

Cite this

Santini, T. C., Warren, K., Raudsepp, M., Carter, N., Hamley, D., McCosker, C., ... Warren, L. A. (2019). Accelerating bauxite residue remediation with microbial biotechnology. In C. Chesonis (Ed.), Light Metals, 2019 (pp. 69-77). (Minerals, Metals and Materials Series). USA: Springer International Publishing AG. https://doi.org/10.1007/978-3-030-05864-7_10
Santini, T. C. ; Warren, K. ; Raudsepp, M. ; Carter, N. ; Hamley, D. ; McCosker, C. ; Couperthwaite, S. ; Southam, G. ; Tyson, G. W. ; Warren, L. A. / Accelerating bauxite residue remediation with microbial biotechnology. Light Metals, 2019. editor / Corleen Chesonis. USA : Springer International Publishing AG, 2019. pp. 69-77 (Minerals, Metals and Materials Series).
@inproceedings{d140271ee9b744eba95a754ed7284475,
title = "Accelerating bauxite residue remediation with microbial biotechnology",
abstract = "Biological neutralisation of pH, driven by the microbial fermentation of added organic carbon substrates such as glucose, has recently emerged as a promising technique for remediation of bauxite residue, dropping pH from >11 to <8 in five days. Here, we report on a glasshouse experiment combining this novel microbially-driven pH neutralisation technology with other existing (abiotic) remediation approaches, including addition of gypsum, sewage sludge, and irrigation. Scaling up the bioremediation treatment by three orders of magnitude from previous laboratory trials to these glasshouse trials was successful. Adding bioremediated residue (5{\^A} cm thick) at the residue surface significantly enhanced pH neutralisation to depth, decreasing pH from 13 to ~10 as far as 25{\^A} cm below the residue surface. Increasing irrigation and tillage frequency accelerated salt removal. Combining our microbial bioneutralisation treatment with fortnightly tillage and daily irrigation provided the best opportunity to rapidly decrease pH and salinity, and is currently being trialled at field scale.",
keywords = "Bioneutralisation, Biotechnology, pH, Salinity, Tillage",
author = "Santini, {T. C.} and K. Warren and M. Raudsepp and N. Carter and D. Hamley and C. McCosker and S. Couperthwaite and G. Southam and Tyson, {G. W.} and Warren, {L. A.}",
year = "2019",
doi = "10.1007/978-3-030-05864-7_10",
language = "English",
isbn = "9783030058630",
series = "Minerals, Metals and Materials Series",
publisher = "Springer International Publishing AG",
pages = "69--77",
editor = "Corleen Chesonis",
booktitle = "Light Metals, 2019",
address = "Switzerland",

}

Santini, TC, Warren, K, Raudsepp, M, Carter, N, Hamley, D, McCosker, C, Couperthwaite, S, Southam, G, Tyson, GW & Warren, LA 2019, Accelerating bauxite residue remediation with microbial biotechnology. in C Chesonis (ed.), Light Metals, 2019. Minerals, Metals and Materials Series, Springer International Publishing AG, USA, pp. 69-77, Light Metals Symposium held at the TMS Annual Meeting and Exhibition, 2019, San Antonio, United States, 10/03/19. https://doi.org/10.1007/978-3-030-05864-7_10

Accelerating bauxite residue remediation with microbial biotechnology. / Santini, T. C.; Warren, K.; Raudsepp, M.; Carter, N.; Hamley, D.; McCosker, C.; Couperthwaite, S.; Southam, G.; Tyson, G. W.; Warren, L. A.

Light Metals, 2019. ed. / Corleen Chesonis. USA : Springer International Publishing AG, 2019. p. 69-77 (Minerals, Metals and Materials Series).

Research output: Chapter in Book/Conference paperConference paper

TY - GEN

T1 - Accelerating bauxite residue remediation with microbial biotechnology

AU - Santini, T. C.

AU - Warren, K.

AU - Raudsepp, M.

AU - Carter, N.

AU - Hamley, D.

AU - McCosker, C.

AU - Couperthwaite, S.

AU - Southam, G.

AU - Tyson, G. W.

AU - Warren, L. A.

PY - 2019

Y1 - 2019

N2 - Biological neutralisation of pH, driven by the microbial fermentation of added organic carbon substrates such as glucose, has recently emerged as a promising technique for remediation of bauxite residue, dropping pH from >11 to <8 in five days. Here, we report on a glasshouse experiment combining this novel microbially-driven pH neutralisation technology with other existing (abiotic) remediation approaches, including addition of gypsum, sewage sludge, and irrigation. Scaling up the bioremediation treatment by three orders of magnitude from previous laboratory trials to these glasshouse trials was successful. Adding bioremediated residue (5 cm thick) at the residue surface significantly enhanced pH neutralisation to depth, decreasing pH from 13 to ~10 as far as 25 cm below the residue surface. Increasing irrigation and tillage frequency accelerated salt removal. Combining our microbial bioneutralisation treatment with fortnightly tillage and daily irrigation provided the best opportunity to rapidly decrease pH and salinity, and is currently being trialled at field scale.

AB - Biological neutralisation of pH, driven by the microbial fermentation of added organic carbon substrates such as glucose, has recently emerged as a promising technique for remediation of bauxite residue, dropping pH from >11 to <8 in five days. Here, we report on a glasshouse experiment combining this novel microbially-driven pH neutralisation technology with other existing (abiotic) remediation approaches, including addition of gypsum, sewage sludge, and irrigation. Scaling up the bioremediation treatment by three orders of magnitude from previous laboratory trials to these glasshouse trials was successful. Adding bioremediated residue (5 cm thick) at the residue surface significantly enhanced pH neutralisation to depth, decreasing pH from 13 to ~10 as far as 25 cm below the residue surface. Increasing irrigation and tillage frequency accelerated salt removal. Combining our microbial bioneutralisation treatment with fortnightly tillage and daily irrigation provided the best opportunity to rapidly decrease pH and salinity, and is currently being trialled at field scale.

KW - Bioneutralisation

KW - Biotechnology

KW - pH

KW - Salinity

KW - Tillage

UR - http://www.scopus.com/inward/record.url?scp=85064874772&partnerID=8YFLogxK

U2 - 10.1007/978-3-030-05864-7_10

DO - 10.1007/978-3-030-05864-7_10

M3 - Conference paper

SN - 9783030058630

T3 - Minerals, Metals and Materials Series

SP - 69

EP - 77

BT - Light Metals, 2019

A2 - Chesonis, Corleen

PB - Springer International Publishing AG

CY - USA

ER -

Santini TC, Warren K, Raudsepp M, Carter N, Hamley D, McCosker C et al. Accelerating bauxite residue remediation with microbial biotechnology. In Chesonis C, editor, Light Metals, 2019. USA: Springer International Publishing AG. 2019. p. 69-77. (Minerals, Metals and Materials Series). https://doi.org/10.1007/978-3-030-05864-7_10