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

Journal article (2017)

Authors

Xiaodi Hao Beijing University of Civil Engineering & Architecture
Ranbin Liu Beijing University of Civil Engineering & Architecture
Mark C.M. van Loosdrecht BT/Environmental Biotechnology - AS , Beijing University of Civil Engineering & Architecture
Daqi Cao Beijing University of Civil Engineering & Architecture
Research Group
BT/Environmental Biotechnology (AS) (TU Delft)
Anaerobic digestion CH Hydrogen partial pressure Excess sludge Exogenous H
More Info
expand_more

Published Date

2017

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Applied Sciences

Department

BT/Biotechnologie

Research Group

BT/Environmental Biotechnology

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.