Improving biogas quality and methane yield via co-digestion of agricultural and urban biomass wastes

Tjalfe G. Poulsen; Laetitia Adelard

doi:10.1016/j.wasman.2016.05.020

Improving biogas quality and methane yield via co-digestion of agricultural and urban biomass wastes

Tjalfe G. Poulsen^*, Laetitia Adelard

^*Corresponding author for this work

Department of Civil Engineering

Reunion Island University

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

35 Citations (Scopus)

Abstract

Impact of co-digestion versus mono-digestion on biogas and CH₄ yield for a set of five biomass materials (vegetable food waste, cow dung, pig manure, grass clippings, and chicken manure) was investigated considering 95 different biomass mixes of the five materials under thermophilic conditions in bench-scale batch experiments over a period of 65 days. Average biogas and CH₄ yields were significantly higher during co-digestion than during mono-digestion of the same materials. This improvement was most significant for co-digestion experiments involving three biomass types, although it was independent of the specific biomasses being co-digested. Improvement in CH₄ production was further more prominent early in the digestion process during co-digestion compared to mono-digestion. Co-digestion also appeared to increase the ultimate CH₄/CO₂ ratio of the gas produced compared to mono-digestion although this tendency was relatively weak and not statistically significant.

Original language	English
Pages (from-to)	118-125
Number of pages	8
Journal	Waste Management
Volume	54
DOIs	https://doi.org/10.1016/j.wasman.2016.05.020
Publication status	Published - 1 Aug 2016

Keywords

Biomass mix composition
Biomass wastes
CH/CO ratio
Co-digestion
Methane yield
Thermophilic conditions

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title = "Improving biogas quality and methane yield via co-digestion of agricultural and urban biomass wastes",

abstract = "Impact of co-digestion versus mono-digestion on biogas and CH4 yield for a set of five biomass materials (vegetable food waste, cow dung, pig manure, grass clippings, and chicken manure) was investigated considering 95 different biomass mixes of the five materials under thermophilic conditions in bench-scale batch experiments over a period of 65 days. Average biogas and CH4 yields were significantly higher during co-digestion than during mono-digestion of the same materials. This improvement was most significant for co-digestion experiments involving three biomass types, although it was independent of the specific biomasses being co-digested. Improvement in CH4 production was further more prominent early in the digestion process during co-digestion compared to mono-digestion. Co-digestion also appeared to increase the ultimate CH4/CO2 ratio of the gas produced compared to mono-digestion although this tendency was relatively weak and not statistically significant.",

keywords = "Biomass mix composition, Biomass wastes, CH/CO ratio, Co-digestion, Methane yield, Thermophilic conditions",

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N2 - Impact of co-digestion versus mono-digestion on biogas and CH4 yield for a set of five biomass materials (vegetable food waste, cow dung, pig manure, grass clippings, and chicken manure) was investigated considering 95 different biomass mixes of the five materials under thermophilic conditions in bench-scale batch experiments over a period of 65 days. Average biogas and CH4 yields were significantly higher during co-digestion than during mono-digestion of the same materials. This improvement was most significant for co-digestion experiments involving three biomass types, although it was independent of the specific biomasses being co-digested. Improvement in CH4 production was further more prominent early in the digestion process during co-digestion compared to mono-digestion. Co-digestion also appeared to increase the ultimate CH4/CO2 ratio of the gas produced compared to mono-digestion although this tendency was relatively weak and not statistically significant.

AB - Impact of co-digestion versus mono-digestion on biogas and CH4 yield for a set of five biomass materials (vegetable food waste, cow dung, pig manure, grass clippings, and chicken manure) was investigated considering 95 different biomass mixes of the five materials under thermophilic conditions in bench-scale batch experiments over a period of 65 days. Average biogas and CH4 yields were significantly higher during co-digestion than during mono-digestion of the same materials. This improvement was most significant for co-digestion experiments involving three biomass types, although it was independent of the specific biomasses being co-digested. Improvement in CH4 production was further more prominent early in the digestion process during co-digestion compared to mono-digestion. Co-digestion also appeared to increase the ultimate CH4/CO2 ratio of the gas produced compared to mono-digestion although this tendency was relatively weak and not statistically significant.

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Improving biogas quality and methane yield via co-digestion of agricultural and urban biomass wastes

Abstract

Keywords

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