Difference between revisions of "Microwave treatment"

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Revision as of 14:15, 13 September 2021

Technology

Technology details
Name:	Microwave pre-treatment
Category:
Feedstock:	Biowaste
Product:

The Microwave pre-treatment includes technologies that utilise electromagnetic radiation to induce thermal and non-thermal effects that drive physical, chemical or biological reactions^[1]. The technology is usually utilised in food drying or to break down the structure of lignocellulosic biomass leading to the release of different substances (e.g. fermentable sugar).

Feedstock

Origin and composition

Lignocellulosic biomass

Pre-treatment

Sizing
- Chipping
- Grinding

Process and technologies

The breakdown of lignocellulosic biomass is induced via dielectric polarisation^[2]. Compared to other thermal treatments, the technology brings several advantages, such as reduced plant footprint, higher throughput, higher reaction rates, higher yield and purity, which has recently led to greater interest^[1]. However, a disadvantage is the unequal distribution of the applied microwave power through non-homogeneous material (such as differences in composition, geometry, size) as well as local overheating and low penetration ^[2].

The process can also be combined with chemical treatments utilising chemicals such as alkaline (to remove lignin) and acid (to remove hemicellulose) solutions, ammonia, and metal salts^[1].

Product

Fermentable sugar (e.g. for bio-alcohol production)

Technology providers

Patents

References

↑ ^a ^b ^c Ethaib, S., Omar, R., Kamal, S. M. M., Biak, D. R. A., 2015: MICROWAVE-ASSISTED PRETREATMENT OF LIGNOCELLULOSICBIOMASS: A REVIEW. Journal of Engineering Science and Technology, Vol. January (2015), 97-109. doi: https://doi.org/
↑ ^a ^b Alejandra Aguilar-Reynosa, Aloia Romaní, Rosa Ma. Rodríguez-Jasso, Cristóbal N. Aguilar, Gil Garrote, Héctor A. Ruiz, 2017-03: Microwave heating processing as alternative of pretreatment in second-generation biorefinery: An overview. Energy Conversion and Management, Vol. 136, 50–65. doi: https://doi.org/10.1016/j.enconman.2017.01.004

[:0-1] Ethaib, S., Omar, R., Kamal, S. M. M., Biak, D. R. A., 2015: MICROWAVE-ASSISTED PRETREATMENT OF LIGNOCELLULOSICBIOMASS: A REVIEW. Journal of Engineering Science and Technology, Vol. January (2015), 97-109. doi: https://doi.org/

[:1-2] Alejandra Aguilar-Reynosa, Aloia Romaní, Rosa Ma. Rodríguez-Jasso, Cristóbal N. Aguilar, Gil Garrote, Héctor A. Ruiz, 2017-03: Microwave heating processing as alternative of pretreatment in second-generation biorefinery: An overview. Energy Conversion and Management, Vol. 136, 50–65. doi: https://doi.org/10.1016/j.enconman.2017.01.004

[1]

[2]

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 ==Process and technologies==
-The breakdown of lignocellulosic biomass is induced  via dielectric polarisation<ref name=":1">{{Cite journal|title=Microwave heating processing as alternative of pretreatment in second-generation biorefinery: An overview|year=2017-03|author=Alejandra Aguilar-Reynosa, Aloia Romaní, Rosa Ma. Rodríguez-Jasso, Cristóbal N. Aguilar, Gil Garrote, Héctor A. Ruiz|journal=Energy Conversion and Management|volume=136|page=50–65|doi=10.1016/j.enconman.2017.01.004}}</ref>. Compared to other thermal treatments, the technology brings several advantages, such as reduced plant footprint, higher throughput, higher reaction rates, higher yield and purity, which has recently led to greater interest<ref name=":0" />. However, a disadvantage is the unequal distribution of the applied microwave power through non-homogeneous material (such as differences in composition, geometry, size) as well as local overheating<ref name=":1" />.
+The breakdown of lignocellulosic biomass is induced  via dielectric polarisation<ref name=":1">{{Cite journal|title=Microwave heating processing as alternative of pretreatment in second-generation biorefinery: An overview|year=2017-03|author=Alejandra Aguilar-Reynosa, Aloia Romaní, Rosa Ma. Rodríguez-Jasso, Cristóbal N. Aguilar, Gil Garrote, Héctor A. Ruiz|journal=Energy Conversion and Management|volume=136|page=50–65|doi=10.1016/j.enconman.2017.01.004}}</ref>. Compared to other thermal treatments, the technology brings several advantages, such as reduced plant footprint, higher throughput, higher reaction rates, higher yield and purity, which has recently led to greater interest<ref name=":0" />. However, a disadvantage is the unequal distribution of the applied microwave power through non-homogeneous material (such as differences in composition, geometry, size) as well as local overheating and low penetration <ref name=":1" />.
 The process can also be combined with chemical treatments utilising chemicals such as [[Hydrolysis#Alkali|alkaline]] (to remove lignin) and [[Hydrolysis#Acid Acid|acid]] (to remove hemicellulose) solutions, ammonia, and [[Hydrolysis#Metal_salts|metal salts]]<ref name=":0" />.