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

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

Journal Article (2017)

Author(s)

Xiaodi Hao (Beijing University of Civil Engineering & Architecture)

Ranbin Liu (Beijing University of Civil Engineering & Architecture)

Mark M.C. van Loosdrecht (TU Delft - BT/Environmental Biotechnology, Beijing University of Civil Engineering & Architecture)

Daqi Cao (Beijing University of Civil Engineering & Architecture)

Research Group

BT/Environmental Biotechnology

DOI related publication

https://doi.org/10.1016/j.cej.2017.02.093

Anaerobic digestion CH Hydrogen partial pressure Excess sludge Exogenous H

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https://resolver.tudelft.nl/uuid:9d37743f-016b-4255-8a8b-d1eb844f5a32

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Publication Year

2017

Language

English

Research Group

BT/Environmental Biotechnology

Volume number

317

Pages (from-to)

544-550

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.

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