Batch influences of exogenous hydrogen on both acidogenesis and methanogenesis of excess sludge

Xiaodi Hao; Ranbin Liu; Mark C.M. van Loosdrecht; Daqi Cao

doi:10.1016/j.cej.2017.02.093

Batch influences of exogenous hydrogen on both acidogenesis and methanogenesis of excess sludge

Xiaodi Hao^*, Ranbin Liu, Mark C.M. van Loosdrecht, Daqi Cao

^*Corresponding author for this work

BT/Environmental Biotechnology

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

22 Citations (Scopus)

Abstract

Methane (CH₄) recovery from excess sludge plays an important role in wastewater treatment aimed at achieving carbon neutrality. Besides pretreatment for excess sludge, exogenous CO₂and even H₂have already been tested in enhancing CH₄production from anaerobic digestion (AD). However, exogenous H₂injected into AD might simultaneously influence both upstream acidogenesis and downstream methanogenesis. In this study, a series of batch tests were conducted to ascertain the influences of hydrogen partial pressure (P_H₂) on these two processes. Interestingly, the batch tests demonstrated that injecting exogenous H₂into AD at the beginning of each batch cycle can both stimulate acidogenesis (organic conversion rate) and enhance methanogenesis (both CH₄and biogas productions) at an appropriate P_H₂(=0.33 bar) and an optimal revolution (R_s = 200 rpm) of a shaker.

Original language	English
Pages (from-to)	544-550
Number of pages	7
Journal	Chemical Engineering Journal
Volume	317
DOIs	https://doi.org/10.1016/j.cej.2017.02.093
Publication status	Published - 2017

Keywords

Anaerobic digestion
CH
Excess sludge
Exogenous H
Hydrogen partial pressure

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10.1016/j.cej.2017.02.093

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title = "Batch influences of exogenous hydrogen on both acidogenesis and methanogenesis of excess sludge",

abstract = "Methane (CH4) recovery from excess sludge plays an important role in wastewater treatment aimed at achieving carbon neutrality. Besides pretreatment for excess sludge, exogenous CO2and even H2have already been tested in enhancing CH4production from anaerobic digestion (AD). However, exogenous H2injected into AD might simultaneously influence both upstream acidogenesis and downstream methanogenesis. In this study, a series of batch tests were conducted to ascertain the influences of hydrogen partial pressure (PH2) on these two processes. Interestingly, the batch tests demonstrated that injecting exogenous H2into AD at the beginning of each batch cycle can both stimulate acidogenesis (organic conversion rate) and enhance methanogenesis (both CH4and biogas productions) at an appropriate PH2(=0.33 bar) and an optimal revolution (Rs = 200 rpm) of a shaker.",

keywords = "Anaerobic digestion, CH, Excess sludge, Exogenous H, Hydrogen partial pressure",

author = "Xiaodi Hao and Ranbin Liu and {van Loosdrecht}, {Mark C.M.} and Daqi Cao",

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doi = "10.1016/j.cej.2017.02.093",

language = "English",

volume = "317",

pages = "544--550",

journal = "Chemical Engineering Journal",

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TY - JOUR

T1 - Batch influences of exogenous hydrogen on both acidogenesis and methanogenesis of excess sludge

AU - Hao, Xiaodi

AU - Liu, Ranbin

AU - van Loosdrecht, Mark C.M.

AU - Cao, Daqi

PY - 2017

Y1 - 2017

N2 - Methane (CH4) recovery from excess sludge plays an important role in wastewater treatment aimed at achieving carbon neutrality. Besides pretreatment for excess sludge, exogenous CO2and even H2have already been tested in enhancing CH4production from anaerobic digestion (AD). However, exogenous H2injected into AD might simultaneously influence both upstream acidogenesis and downstream methanogenesis. In this study, a series of batch tests were conducted to ascertain the influences of hydrogen partial pressure (PH2) on these two processes. Interestingly, the batch tests demonstrated that injecting exogenous H2into AD at the beginning of each batch cycle can both stimulate acidogenesis (organic conversion rate) and enhance methanogenesis (both CH4and biogas productions) at an appropriate PH2(=0.33 bar) and an optimal revolution (Rs = 200 rpm) of a shaker.

AB - Methane (CH4) recovery from excess sludge plays an important role in wastewater treatment aimed at achieving carbon neutrality. Besides pretreatment for excess sludge, exogenous CO2and even H2have already been tested in enhancing CH4production from anaerobic digestion (AD). However, exogenous H2injected into AD might simultaneously influence both upstream acidogenesis and downstream methanogenesis. In this study, a series of batch tests were conducted to ascertain the influences of hydrogen partial pressure (PH2) on these two processes. Interestingly, the batch tests demonstrated that injecting exogenous H2into AD at the beginning of each batch cycle can both stimulate acidogenesis (organic conversion rate) and enhance methanogenesis (both CH4and biogas productions) at an appropriate PH2(=0.33 bar) and an optimal revolution (Rs = 200 rpm) of a shaker.

KW - Anaerobic digestion

KW - CH

KW - Excess sludge

KW - Exogenous H

KW - Hydrogen partial pressure

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U2 - 10.1016/j.cej.2017.02.093

DO - 10.1016/j.cej.2017.02.093

M3 - Article

SN - 1385-8947

VL - 317

SP - 544

EP - 550

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -

Batch influences of exogenous hydrogen on both acidogenesis and methanogenesis of excess sludge

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Keywords

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