Enhanced methane production kinetics by graphene oxide in fed-batch tests

Michele Ponzelli; Jelena Radjenovic; Jörg E. Drewes; Konrad Koch

doi:10.1016/j.biortech.2022.127642

Enhanced methane production kinetics by graphene oxide in fed-batch tests

Michele Ponzelli, Jelena Radjenovic, Jörg E. Drewes, Konrad Koch

Chair of Urban Water Systems Engineering

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

The study aims to prove that the addition of graphene oxide (GO) improves anaerobic digestion (AD) kinetic performance. Classical batch tests were modified to a fed-batch strategy at four GO levels while using two substrates (glucose and microcrystalline cellulose (MCC)). First-order and modified Gompertz models were respectively applied to evaluate the kinetic performance. The results showed significantly (p < 0.05) improved kinetic from the third refeeding step for both substrates. 20 mg GO per g of volatile solids (VS) led to an increase of up to 210% for the first-order rate constant (k) and up to 120% for maximum biochemical methane potential (BMP) rate (R_MAX) compared to control for glucose and MCC, respectively. The findings of this work suggest the implementation of GO in continuously operated systems to accelerate the AD process.

Original language	English
Article number	127642
Journal	Bioresource Technology
Volume	360
DOIs	https://doi.org/10.1016/j.biortech.2022.127642
State	Published - Sep 2022

Keywords

Anaerobic digestion
Biochemical methane potential tests
Graphene oxide
Methane production kinetics
Modeling

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.biortech.2022.127642

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title = "Enhanced methane production kinetics by graphene oxide in fed-batch tests",

abstract = "The study aims to prove that the addition of graphene oxide (GO) improves anaerobic digestion (AD) kinetic performance. Classical batch tests were modified to a fed-batch strategy at four GO levels while using two substrates (glucose and microcrystalline cellulose (MCC)). First-order and modified Gompertz models were respectively applied to evaluate the kinetic performance. The results showed significantly (p < 0.05) improved kinetic from the third refeeding step for both substrates. 20 mg GO per g of volatile solids (VS) led to an increase of up to 210% for the first-order rate constant (k) and up to 120% for maximum biochemical methane potential (BMP) rate (RMAX) compared to control for glucose and MCC, respectively. The findings of this work suggest the implementation of GO in continuously operated systems to accelerate the AD process.",

keywords = "Anaerobic digestion, Biochemical methane potential tests, Graphene oxide, Methane production kinetics, Modeling",

author = "Michele Ponzelli and Jelena Radjenovic and Drewes, {J{\"o}rg E.} and Konrad Koch",

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year = "2022",

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doi = "10.1016/j.biortech.2022.127642",

language = "English",

volume = "360",

journal = "Bioresource Technology",

issn = "0960-8524",

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T1 - Enhanced methane production kinetics by graphene oxide in fed-batch tests

AU - Ponzelli, Michele

AU - Radjenovic, Jelena

AU - Drewes, Jörg E.

AU - Koch, Konrad

PY - 2022/9

Y1 - 2022/9

N2 - The study aims to prove that the addition of graphene oxide (GO) improves anaerobic digestion (AD) kinetic performance. Classical batch tests were modified to a fed-batch strategy at four GO levels while using two substrates (glucose and microcrystalline cellulose (MCC)). First-order and modified Gompertz models were respectively applied to evaluate the kinetic performance. The results showed significantly (p < 0.05) improved kinetic from the third refeeding step for both substrates. 20 mg GO per g of volatile solids (VS) led to an increase of up to 210% for the first-order rate constant (k) and up to 120% for maximum biochemical methane potential (BMP) rate (RMAX) compared to control for glucose and MCC, respectively. The findings of this work suggest the implementation of GO in continuously operated systems to accelerate the AD process.

AB - The study aims to prove that the addition of graphene oxide (GO) improves anaerobic digestion (AD) kinetic performance. Classical batch tests were modified to a fed-batch strategy at four GO levels while using two substrates (glucose and microcrystalline cellulose (MCC)). First-order and modified Gompertz models were respectively applied to evaluate the kinetic performance. The results showed significantly (p < 0.05) improved kinetic from the third refeeding step for both substrates. 20 mg GO per g of volatile solids (VS) led to an increase of up to 210% for the first-order rate constant (k) and up to 120% for maximum biochemical methane potential (BMP) rate (RMAX) compared to control for glucose and MCC, respectively. The findings of this work suggest the implementation of GO in continuously operated systems to accelerate the AD process.

KW - Anaerobic digestion

KW - Biochemical methane potential tests

KW - Graphene oxide

KW - Methane production kinetics

KW - Modeling

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Enhanced methane production kinetics by graphene oxide in fed-batch tests

Abstract

Keywords

UN SDGs

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