Valorization of Distillery Stillage for Bioenergy Production: A Review

In alcohol distilleries, the amount of distillery stillage generated can be up to 15 times larger than the amount of alcohol produced. The stillage has high concentrations of organics and nitrogen, a low pH, and a dark brown color. Currently, stillage is mainly used for soil fertilization. For this...

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Autores principales:	Magdalena Zielińska, Katarzyna Bułkowska, Wioleta Mikucka
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	biomethane bioethanol biohydrogen bioelectrochemical treatment polyphenols melanoidin Technology T
Acceso en línea:	https://doaj.org/article/d794b525cfc14dd094d9769d32c14ad8
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spelling	oai:doaj.org-article:d794b525cfc14dd094d9769d32c14ad82021-11-11T15:59:54ZValorization of Distillery Stillage for Bioenergy Production: A Review10.3390/en142172351996-1073https://doaj.org/article/d794b525cfc14dd094d9769d32c14ad82021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7235https://doaj.org/toc/1996-1073In alcohol distilleries, the amount of distillery stillage generated can be up to 15 times larger than the amount of alcohol produced. The stillage has high concentrations of organics and nitrogen, a low pH, and a dark brown color. Currently, stillage is mainly used for soil fertilization. For this purpose, it requires thickening and is used seasonally, which creates storage problems and transport costs. To reduce environmental pollution, physicochemical and biological processes have been employed for the treatment of distillery stillage. However, according to bioeconomy principles, the stillage should be transformed into value-added products. Therefore, this review paper focuses on methods of stillage processing that enable energy recovery. Due to its high content of organic compounds, stillage is often used as a raw material for biogas production. Accordingly, anaerobic digestion of stillage is discussed, including an overview of the bioreactors used and the effects of operational parameters on organics removal and biogas production. The necessity of integrating anaerobic stillage treatment with other treatment processes is presented. As complex compounds that are present in the stillage (mainly polyphenols and melanoidin) are difficult to biodegrade and have antibacterial activities, the effect of their recovery on biogas production is described. Next, the possibility of converting distillery stillage to bioethanol and biohydrogen is presented. In addition, bioelectrochemical treatment of distillery stillage using microbial fuel cells is discussed. For all these treatment methods, current challenges and opportunities are given.Magdalena ZielińskaKatarzyna BułkowskaWioleta MikuckaMDPI AGarticlebiomethanebioethanolbiohydrogenbioelectrochemical treatmentpolyphenolsmelanoidinTechnologyTENEnergies, Vol 14, Iss 7235, p 7235 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biomethane bioethanol biohydrogen bioelectrochemical treatment polyphenols melanoidin Technology T
spellingShingle	biomethane bioethanol biohydrogen bioelectrochemical treatment polyphenols melanoidin Technology T Magdalena Zielińska Katarzyna Bułkowska Wioleta Mikucka Valorization of Distillery Stillage for Bioenergy Production: A Review
description	In alcohol distilleries, the amount of distillery stillage generated can be up to 15 times larger than the amount of alcohol produced. The stillage has high concentrations of organics and nitrogen, a low pH, and a dark brown color. Currently, stillage is mainly used for soil fertilization. For this purpose, it requires thickening and is used seasonally, which creates storage problems and transport costs. To reduce environmental pollution, physicochemical and biological processes have been employed for the treatment of distillery stillage. However, according to bioeconomy principles, the stillage should be transformed into value-added products. Therefore, this review paper focuses on methods of stillage processing that enable energy recovery. Due to its high content of organic compounds, stillage is often used as a raw material for biogas production. Accordingly, anaerobic digestion of stillage is discussed, including an overview of the bioreactors used and the effects of operational parameters on organics removal and biogas production. The necessity of integrating anaerobic stillage treatment with other treatment processes is presented. As complex compounds that are present in the stillage (mainly polyphenols and melanoidin) are difficult to biodegrade and have antibacterial activities, the effect of their recovery on biogas production is described. Next, the possibility of converting distillery stillage to bioethanol and biohydrogen is presented. In addition, bioelectrochemical treatment of distillery stillage using microbial fuel cells is discussed. For all these treatment methods, current challenges and opportunities are given.
format	article
author	Magdalena Zielińska Katarzyna Bułkowska Wioleta Mikucka
author_facet	Magdalena Zielińska Katarzyna Bułkowska Wioleta Mikucka
author_sort	Magdalena Zielińska
title	Valorization of Distillery Stillage for Bioenergy Production: A Review
title_short	Valorization of Distillery Stillage for Bioenergy Production: A Review
title_full	Valorization of Distillery Stillage for Bioenergy Production: A Review
title_fullStr	Valorization of Distillery Stillage for Bioenergy Production: A Review
title_full_unstemmed	Valorization of Distillery Stillage for Bioenergy Production: A Review
title_sort	valorization of distillery stillage for bioenergy production: a review
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d794b525cfc14dd094d9769d32c14ad8
work_keys_str_mv	AT magdalenazielinska valorizationofdistillerystillageforbioenergyproductionareview AT katarzynabułkowska valorizationofdistillerystillageforbioenergyproductionareview AT wioletamikucka valorizationofdistillerystillageforbioenergyproductionareview
_version_	1718432442580205568

Valorization of Distillery Stillage for Bioenergy Production: A Review

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