Crop residues as soil amendments and feedstock for bioethanol production
Abstract
Traditional solid fuels account for more than 90% of the energy supply for 3 billion people in developing countries. However, liquid biofuels (e.g., ethanol) are perceived as an important alternative to fossil fuel. Global crop residue production is estimated at about 4 billion Mg for all crops and 3 billion Mg per annum for lignocellulosic residues of cereals. One Mg of corn stover can produce 280L of ethanol, compared with 400L from 1Mg of corn grains; 1Mg of biomass is also equivalent to 18.5GJ of energy. Thus, 3 billion Mg of residues are equivalent to 840 billion L of ethanol or 56x10(9)GJ of energy. However, removal of crop residues exacerbates soil degradation, increases net emission of CO2, and aggravates food insecurity. Increasing the SOC pool by 1 Mg C ha(-1)yr(-1) through residue retention on soil can increase world food grain production by 24-40 million Mg yr(-1), and root/tuber production by 6-11 million Mg yr(-1). Thus, identifying alternate sources of biofuel feedstock (e.g., biofuel plantations, animal waste, municipal sold waste) is a high priority. Establishing biofuel plantations on agriculturally marginal or degraded lands can off-set 3.5-4 Pg Cyr(-1).
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Except for a few literature reports, the effects caused by wheat straw removal for bioethanol production purposes are neglected in most bioethanol LCA studies.
“Except for a few literature reports [19,20], the effects caused by wheat straw removal for bioethanol production purposes are neglected in most bioethanol LCA studies.”
From Environmental sustainability of bioethanol production from wheat straw in the UK (2013) · cites this paper as [20]
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- Authors
- Lal, R.
- Affiliations
- The Ohio State University (US)
- Corresponding author
- Lal, R.
- ORCID
- Lal, R.
- Venue
- Waste Management
- Publisher
- Elsevier BV
- Published
- 2008-01
- Volume
- 28
- Issue
- 4
- Pages
- 747-758
- ISSN
- 0956-053X (ISSN-L)
- OpenAlex
- W2064572418
- Cited by
- 215
- References
- 62
- Citations by year
- 2026: 4 · 2025: 2 · 2024: 5 · 2023: 12 · 2022: 9 · 2021: 20 · 2020: 14 · 2019: 10 · 2018: 7 · 2017: 8 · 2016: 10 · 2015: 24 · 2014: 11 · 2013: 20 · 2012: 17
- FWCI
- 19.16
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Waste Management (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Bioenergy crop production and management
- Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Keywords
- crop residues, bioethanol, lignocellulosic biomass, soil organic carbon, residue retention, soil degradation, food security, biofuel feedstock, corn stover, CO2 emissions
- MeSH terms
- Ethanol, Animals, Carbon, Energy-Generating Resources, Poaceae, Manure, Soil, Waste Products, Biomass, Crops, Agricultural
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