A sustainability assessment of bioethanol (EtOH) production: The case of cassava in Colombia

Claudia Pabon-Pereira*, Maja Slingerland, Sanna Hogervorst, Jules van Lier, Rudy Rabbinge

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

This paper shows how system design determines sustainability outcomes of cassava bioethanol production in Colombia. The recovery of the energy contained in by-products is recommended as compared to single product production. In particular, this study assesses the energy, greenhouse gases, water, and land use performance of alternative cassava cascades working at different scales, highlighting the implications of including anaerobic digestion technology in the chain. The centralized systems showed a poorer energy and greenhouse gases performance as compared to decentralized ones in part due to the artificial drying of cassava chips in the centralized facility. Under solar drying of cassava chips, systems with anaerobic digestion produced three to five times more energy than demanded and produced greenhouse gas savings of 0.3 kgCO2eq L EtOH-1. The water balance output depends upon the water reuse within the ethanol industry, which demands 21-23 L EtOH-1. In the anaerobic digestion scenarios, assuming liquid flows are treated separately, complete water recovery is feasible. Land use for cassava cultivation was calculated to be 0.27-0.35 ha tEtOH-1. The energy and water content of the material to digest, the options for digestate reuse, and the recovery of the methane produced are major considerations substantially influencing the role of anaerobic digestion within cassava cascade configurations.

Original languageEnglish
Article number3968
JournalSustainability (Switzerland)
Volume11
Issue number14
DOIs
Publication statusPublished - 22 Jul 2019

Fingerprint

Bioethanol
cassava
Anaerobic digestion
Colombia
Sustainable development
sustainability
Greenhouse gases
energy
water
Land use
Recovery
Water
Drying
greenhouse gas
land use
Water content
Byproducts
Methane
Ethanol
Systems analysis

Keywords

  • Bioenergy production
  • Bioethanol
  • Biofuels
  • Cassava
  • Energy crops
  • Sustainability analysis

Cite this

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title = "A sustainability assessment of bioethanol (EtOH) production: The case of cassava in Colombia",
abstract = "This paper shows how system design determines sustainability outcomes of cassava bioethanol production in Colombia. The recovery of the energy contained in by-products is recommended as compared to single product production. In particular, this study assesses the energy, greenhouse gases, water, and land use performance of alternative cassava cascades working at different scales, highlighting the implications of including anaerobic digestion technology in the chain. The centralized systems showed a poorer energy and greenhouse gases performance as compared to decentralized ones in part due to the artificial drying of cassava chips in the centralized facility. Under solar drying of cassava chips, systems with anaerobic digestion produced three to five times more energy than demanded and produced greenhouse gas savings of 0.3 kgCO2eq L EtOH-1. The water balance output depends upon the water reuse within the ethanol industry, which demands 21-23 L EtOH-1. In the anaerobic digestion scenarios, assuming liquid flows are treated separately, complete water recovery is feasible. Land use for cassava cultivation was calculated to be 0.27-0.35 ha tEtOH-1. The energy and water content of the material to digest, the options for digestate reuse, and the recovery of the methane produced are major considerations substantially influencing the role of anaerobic digestion within cassava cascade configurations.",
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A sustainability assessment of bioethanol (EtOH) production: The case of cassava in Colombia. / Pabon-Pereira, Claudia; Slingerland, Maja; Hogervorst, Sanna; van Lier, Jules; Rabbinge, Rudy.

In: Sustainability (Switzerland), Vol. 11, No. 14, 3968, 22.07.2019.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Rabbinge, Rudy

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