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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.)

Modelling bioaugmentation: Engineering intervention in anaerobic digestion

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Author(s):
Lovato, Giovanna [1, 2] ; Kovalovszki, Adam [3] ; Alvarado-Morales, Merlin [3] ; Arjuna Jeglot, Arnaud Tristan [4] ; Domingues Rodrigues, Jose Alberto [1] ; Angelidaki, Irini [3]
Total Authors: 6
Affiliation:
[1] Maua Inst Technol EEM IMT, Maua Sch Engn, Praca Maua 1, BR-09580900 Sao Caetano do Sul, SP - Brazil
[2] Univ Sao Paulo EESC USP, Sao Carlos Sch Engn, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil
[3] Tech Univ Denmark, Dept Chem & Biochem Engn, Bldg 227, DK-2800 Lyngby - Denmark
[4] Aarhus Univ, Dept Agroecol Soil Fertil, Blichers Alle 20, DK-8830 Tjele - Denmark
Total Affiliations: 4
Document type: Journal article
Source: RENEWABLE ENERGY; v. 175, p. 1080-1087, SEP 2021.
Web of Science Citations: 0
Abstract

Bioaugmentation the addition of specific microorganisms to microbial consortia to obtain specific functions is a promising method to improve the performance of sub-optimal anaerobic digestion processes and recover methane production. The present study implements for the first time a model with bioaugmentation functionalities, enabling the dynamic microbiological study of augmented anaerobic systems. The model is based on a previous advanced mathematical model focused on ammonia inhibition, which was extended. Three inhibited anaerobic digestion experiments were simulated, where bioaugmentation involved the addition of: (i) hydrogenotrophic methanogenic archaea; (ii) a combination of hydrogenotrophs and syntrophic acetate oxidizing bacteria; and (iii) acetoclastic methanogenic archaea to the inhibited reactors. Methane productivity, pH, and ammonia were correctly predicted by the model, with weighted absolute percentage errors below 10%. Trends in volatile fatty acids accumulation and consumption showed good agreement between in silico and in vivo data. Simulations revealed that bioaugmentation will result in process improvement when specialized hydrogenotrophs are used: not only do they establish themselves in the inhibited environment, but also help in the recovery of acetoclastic methanogens. Overall, the mathematical approach adopted to describe the bioaugmentation phenomena resulted in a robust computational tool for simulation of general bioaugmentation strategies. (c) 2021 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 15/06246-7 - Biorefinery concept applied to biological wastewater treatment plants: environmental pollution control coupled with material and energy recovery
Grantee:Marcelo Zaiat
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 18/17715-6 - Biohydrogen production by treating agro-industry wastes (whey and glycerin) in an AnSBBR operated in thermophilic condition
Grantee:Giovanna Lovato
Support Opportunities: Scholarships in Brazil - Post-Doctoral