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Pre- and post-treatment assessment for the anaerobic digestion of lignocellulosic waste: P-graph

Yee, Van Fan and Klemes, Jirí Jaromír and Lee, Chew Tin (2018) Pre- and post-treatment assessment for the anaerobic digestion of lignocellulosic waste: P-graph. Chemical Engineering Transactions, 63 . pp. 1-6. ISSN 2283-9216

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Official URL: http://dx.doi.org/10.3303/CET1863001

Abstract

Lignocellulosic waste is one of the most abundant and potential feedstocks for anaerobic digestion (AD), but the energy efficiency is limited by the lignocellulosic composition which is recalcitrant to biodegradation. Pretreatment of feedstock and the post-treatment of biogas and digestate play a significant role in enhancing the AD efficiency as well as the product utilisation. This study aims to determine the cost-optimal pre-and post-treatment pathway for an AD of lignocellulosic waste by applying P-graph. The economic balance between the main operating cost, yield and quality of products were considered. The treatment options were overviewed followed by a case study considered a different combination of physical, chemical and biological pretreatments, biogas post-treatment (combine heat and power, fuel cell, biomethane, biofuel) and digestate treatments. A total of 9 pre-treatments for lignocellulosic waste, 2 digestate post-treatments and 9 post-treatments for biogas were evaluated in this study. Chemical pre-treatment by CaO, post-treatment by H2S removal with membrane separation for biomethane production and without the composting of digestate is suggested as the optimal treatment pathway for lignocellulosic waste.

Item Type:Article
Uncontrolled Keywords:Lignocellulosic waste, anaerobic digestion
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:85006
Deposited By: Widya Wahid
Deposited On:29 Feb 2020 21:19
Last Modified:29 Feb 2020 21:19

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