Enhancing the solid-state anaerobic digestion of fallen leaves through simultaneous alkaline treatment

Lo Niee Liew; Jian Shi; Yebo Li

doi:10.1016/j.biortech.2011.07.005

Enhancing the solid-state anaerobic digestion of fallen leaves through simultaneous alkaline treatment

Lo Niee Liew
, Jian Shi
, Yebo Li

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

190 Scopus citations

Abstract

Previous studies have shown that alkali pretreatment prior to anaerobic digestion (AD) can increase the digestibility of lignocellulosic biomass and methane yield. In order to simplify the process and reduce the capital cost, simultaneous alkali treatment and anaerobic digestion was evaluated for methane production from fallen leaves. The highest methane yield of 82. L/kg volatile solids (VS) was obtained at NaOH loading of 3.5% and substrate-to-inoculum (S/I) ratio of 4.1. The greatest enhancement in methane yield was achieved at S/I ratio of 6.2 with NaOH loading of 3.5% which was 24-fold higher than that of the control (without NaOH addition). Reactors at S/I ratio of 8.2 resulted in failure of the AD process. In addition, increasing the total solid (TS) content from 20% to 26% reduced biogas yield by 35% at S/I ratio of 6.2 and NaOH loading of 3.5%. Cellulose and hemicellulose degradation and methane yields are highly related.

Original language	English
Pages (from-to)	8828-8834
Number of pages	7
Journal	Bioresource Technology
Volume	102
Issue number	19
DOIs	https://doi.org/10.1016/j.biortech.2011.07.005
State	Published - Oct 2011

Bibliographical note

Funding Information:
This project was supported by Ohio Agricultural Research and Development Center (OARDC) Seeds Program ( 2008-043 ) and The Ohio Third Frontier Program ( 10-059 ). The authors thank Mrs. Mary Wicks (Department of Food, Agricultural and Biological Engineering, OSU) for reading through the manuscript and providing useful suggestions.

Funding

This project was supported by Ohio Agricultural Research and Development Center (OARDC) Seeds Program ( 2008-043 ) and The Ohio Third Frontier Program ( 10-059 ). The authors thank Mrs. Mary Wicks (Department of Food, Agricultural and Biological Engineering, OSU) for reading through the manuscript and providing useful suggestions.

Funders	Funder number
Ohio Agricultural Research and Development Center	2008-043
Ohio Third Frontier Program	10-059

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Alkali pretreatment
Anaerobic digestion
Biogas
Dry fermentation
Leaves

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

Access to Document

10.1016/j.biortech.2011.07.005

Cite this

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title = "Enhancing the solid-state anaerobic digestion of fallen leaves through simultaneous alkaline treatment",

abstract = "Previous studies have shown that alkali pretreatment prior to anaerobic digestion (AD) can increase the digestibility of lignocellulosic biomass and methane yield. In order to simplify the process and reduce the capital cost, simultaneous alkali treatment and anaerobic digestion was evaluated for methane production from fallen leaves. The highest methane yield of 82. L/kg volatile solids (VS) was obtained at NaOH loading of 3.5\% and substrate-to-inoculum (S/I) ratio of 4.1. The greatest enhancement in methane yield was achieved at S/I ratio of 6.2 with NaOH loading of 3.5\% which was 24-fold higher than that of the control (without NaOH addition). Reactors at S/I ratio of 8.2 resulted in failure of the AD process. In addition, increasing the total solid (TS) content from 20\% to 26\% reduced biogas yield by 35\% at S/I ratio of 6.2 and NaOH loading of 3.5\%. Cellulose and hemicellulose degradation and methane yields are highly related.",

keywords = "Alkali pretreatment, Anaerobic digestion, Biogas, Dry fermentation, Leaves",

author = "Liew, \{Lo Niee\} and Jian Shi and Yebo Li",

note = "Funding Information: This project was supported by Ohio Agricultural Research and Development Center (OARDC) Seeds Program ( 2008-043 ) and The Ohio Third Frontier Program ( 10-059 ). The authors thank Mrs. Mary Wicks (Department of Food, Agricultural and Biological Engineering, OSU) for reading through the manuscript and providing useful suggestions. ",

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AU - Liew, Lo Niee

AU - Shi, Jian

AU - Li, Yebo

N1 - Funding Information: This project was supported by Ohio Agricultural Research and Development Center (OARDC) Seeds Program ( 2008-043 ) and The Ohio Third Frontier Program ( 10-059 ). The authors thank Mrs. Mary Wicks (Department of Food, Agricultural and Biological Engineering, OSU) for reading through the manuscript and providing useful suggestions.

PY - 2011/10

Y1 - 2011/10

N2 - Previous studies have shown that alkali pretreatment prior to anaerobic digestion (AD) can increase the digestibility of lignocellulosic biomass and methane yield. In order to simplify the process and reduce the capital cost, simultaneous alkali treatment and anaerobic digestion was evaluated for methane production from fallen leaves. The highest methane yield of 82. L/kg volatile solids (VS) was obtained at NaOH loading of 3.5% and substrate-to-inoculum (S/I) ratio of 4.1. The greatest enhancement in methane yield was achieved at S/I ratio of 6.2 with NaOH loading of 3.5% which was 24-fold higher than that of the control (without NaOH addition). Reactors at S/I ratio of 8.2 resulted in failure of the AD process. In addition, increasing the total solid (TS) content from 20% to 26% reduced biogas yield by 35% at S/I ratio of 6.2 and NaOH loading of 3.5%. Cellulose and hemicellulose degradation and methane yields are highly related.

AB - Previous studies have shown that alkali pretreatment prior to anaerobic digestion (AD) can increase the digestibility of lignocellulosic biomass and methane yield. In order to simplify the process and reduce the capital cost, simultaneous alkali treatment and anaerobic digestion was evaluated for methane production from fallen leaves. The highest methane yield of 82. L/kg volatile solids (VS) was obtained at NaOH loading of 3.5% and substrate-to-inoculum (S/I) ratio of 4.1. The greatest enhancement in methane yield was achieved at S/I ratio of 6.2 with NaOH loading of 3.5% which was 24-fold higher than that of the control (without NaOH addition). Reactors at S/I ratio of 8.2 resulted in failure of the AD process. In addition, increasing the total solid (TS) content from 20% to 26% reduced biogas yield by 35% at S/I ratio of 6.2 and NaOH loading of 3.5%. Cellulose and hemicellulose degradation and methane yields are highly related.

KW - Alkali pretreatment

KW - Anaerobic digestion

KW - Biogas

KW - Dry fermentation

KW - Leaves

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Enhancing the solid-state anaerobic digestion of fallen leaves through simultaneous alkaline treatment

Abstract

Bibliographical note

Funding

UN SDGs

Keywords

ASJC Scopus subject areas

Access to Document

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