Evaluation of the wastewater generated during alkaline pretreatment of biomass for feasibility of recycling and reusing

Seonghun Kim; Sang Dae Kim; Seok Young Sohn

doi:10.1016/j.renene.2020.04.018

Evaluation of the wastewater generated during alkaline pretreatment of biomass for feasibility of recycling and reusing

Seonghun Kim, Sang Dae Kim, Seok Young Sohn

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

Abstract

We evaluated the wastewater generated in the alkali pretreatment process of Miscanthus sacchariflorus with sodium hydroxide for the feasibility of recycling and reusing. After thermal alkali pretreatment of the biomass, the separated alkaline solution and the biomass wash water were filtrated using several different types of membranes to recover sodium hydroxide, as well as to eliminate lignin-hemicellulose fractions from the wastewater. Ion concentration, total organic carbon, and acid-hydrolyzed carbohydrate contents were analyzed to evaluate the quality of the alkaline wastewater. The data indicated that a poly(ether)sulfone-based ultrafiltration (UF) membrane filter with a low molecular weight cut-off was able to recover > 98% sodium ions and to remove > 60% of solubilized organic carbon fractions from the alkaline wastewater. These results indicated that filtration using UF membrane could be an alternative strategy to reuse wastewater and to recover the alkali catalyst in the alkali pretreatment process.

Original language	English
Pages (from-to)	1156-1164
Number of pages	9
Journal	Renewable Energy
Volume	155
DOIs	https://doi.org/10.1016/j.renene.2020.04.018
Publication status	Published - 2020 Aug
Externally published	Yes

Keywords

Alkali pretreatment
Alkaline wastewater
Bioethanol
Membrane filtration
Miscanthus
Polyethersulfone-based ultrafiltration membrane

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment

UN SDGs

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

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10.1016/j.renene.2020.04.018

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title = "Evaluation of the wastewater generated during alkaline pretreatment of biomass for feasibility of recycling and reusing",

abstract = "We evaluated the wastewater generated in the alkali pretreatment process of Miscanthus sacchariflorus with sodium hydroxide for the feasibility of recycling and reusing. After thermal alkali pretreatment of the biomass, the separated alkaline solution and the biomass wash water were filtrated using several different types of membranes to recover sodium hydroxide, as well as to eliminate lignin-hemicellulose fractions from the wastewater. Ion concentration, total organic carbon, and acid-hydrolyzed carbohydrate contents were analyzed to evaluate the quality of the alkaline wastewater. The data indicated that a poly(ether)sulfone-based ultrafiltration (UF) membrane filter with a low molecular weight cut-off was able to recover > 98% sodium ions and to remove > 60% of solubilized organic carbon fractions from the alkaline wastewater. These results indicated that filtration using UF membrane could be an alternative strategy to reuse wastewater and to recover the alkali catalyst in the alkali pretreatment process.",

keywords = "Alkali pretreatment, Alkaline wastewater, Bioethanol, Membrane filtration, Miscanthus, Polyethersulfone-based ultrafiltration membrane",

author = "Seonghun Kim and Kim, {Sang Dae} and Sohn, {Seok Young}",

note = "Funding Information: We would like to appreciate J.S. Jung and Y. Kim at Changhae ethanol for supplementary of the byproduct samples in bioethanol fermentation process. This work was mainly supported by the New & Renewable Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Panning (KETEP) granted financial resource from the Ministry of Trade, Industry and Energy, Republic of Korea (No. 1415137207 & 20153030101580 ). It was also partially supported by Research Exchange Program under Memorandum of Understanding between the NRF-DAAD (NRF- 2013K2A5A5079255 ) from Korea National Research Foundation (NRF) and KRIBB Research Initiative Program grant for SK. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

month = aug,

doi = "10.1016/j.renene.2020.04.018",

language = "English",

volume = "155",

pages = "1156--1164",

journal = "Renewable Energy",

issn = "0960-1481",

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T1 - Evaluation of the wastewater generated during alkaline pretreatment of biomass for feasibility of recycling and reusing

AU - Kim, Seonghun

AU - Kim, Sang Dae

AU - Sohn, Seok Young

N1 - Funding Information: We would like to appreciate J.S. Jung and Y. Kim at Changhae ethanol for supplementary of the byproduct samples in bioethanol fermentation process. This work was mainly supported by the New & Renewable Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Panning (KETEP) granted financial resource from the Ministry of Trade, Industry and Energy, Republic of Korea (No. 1415137207 & 20153030101580 ). It was also partially supported by Research Exchange Program under Memorandum of Understanding between the NRF-DAAD (NRF- 2013K2A5A5079255 ) from Korea National Research Foundation (NRF) and KRIBB Research Initiative Program grant for SK. Publisher Copyright: © 2020 Elsevier Ltd

PY - 2020/8

Y1 - 2020/8

N2 - We evaluated the wastewater generated in the alkali pretreatment process of Miscanthus sacchariflorus with sodium hydroxide for the feasibility of recycling and reusing. After thermal alkali pretreatment of the biomass, the separated alkaline solution and the biomass wash water were filtrated using several different types of membranes to recover sodium hydroxide, as well as to eliminate lignin-hemicellulose fractions from the wastewater. Ion concentration, total organic carbon, and acid-hydrolyzed carbohydrate contents were analyzed to evaluate the quality of the alkaline wastewater. The data indicated that a poly(ether)sulfone-based ultrafiltration (UF) membrane filter with a low molecular weight cut-off was able to recover > 98% sodium ions and to remove > 60% of solubilized organic carbon fractions from the alkaline wastewater. These results indicated that filtration using UF membrane could be an alternative strategy to reuse wastewater and to recover the alkali catalyst in the alkali pretreatment process.

AB - We evaluated the wastewater generated in the alkali pretreatment process of Miscanthus sacchariflorus with sodium hydroxide for the feasibility of recycling and reusing. After thermal alkali pretreatment of the biomass, the separated alkaline solution and the biomass wash water were filtrated using several different types of membranes to recover sodium hydroxide, as well as to eliminate lignin-hemicellulose fractions from the wastewater. Ion concentration, total organic carbon, and acid-hydrolyzed carbohydrate contents were analyzed to evaluate the quality of the alkaline wastewater. The data indicated that a poly(ether)sulfone-based ultrafiltration (UF) membrane filter with a low molecular weight cut-off was able to recover > 98% sodium ions and to remove > 60% of solubilized organic carbon fractions from the alkaline wastewater. These results indicated that filtration using UF membrane could be an alternative strategy to reuse wastewater and to recover the alkali catalyst in the alkali pretreatment process.

KW - Alkali pretreatment

KW - Alkaline wastewater

KW - Bioethanol

KW - Membrane filtration

KW - Miscanthus

KW - Polyethersulfone-based ultrafiltration membrane

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JO - Renewable Energy

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Evaluation of the wastewater generated during alkaline pretreatment of biomass for feasibility of recycling and reusing

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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