From Agri-Food Wastes to Polyhydroxyalkanoates through a Sustainable Process

被引:8
|
作者
Verdini, Federico [1 ]
Tabasso, Silvia [1 ]
Mariatti, Francesco [1 ]
Bosco, Francesca [2 ]
Mollea, Chiara [2 ]
Gaudino, Emanuela Calcio [1 ]
Cirio, Alessio [1 ]
Cravotto, Giancarlo [1 ]
机构
[1] Univ Turin, Dipartimento Sci & Tecnol Farmaco, Via P Giuria 9, I-10125 Turin, Italy
[2] Politecn Torino, DISAT, Dept Appl Sci & Technol, Cso Duca Degli Abruzzi 24, I-10129 Turin, Italy
来源
FERMENTATION-BASEL | 2022年 / 8卷 / 10期
关键词
corn straw; mixed microbial cell culture (MMC); microwaves; biopolymers; lignocellulosic biomass; WHEAT-STRAW; BIOCONVERSION; PRETREATMENT; DEGRADATION; STRATEGIES; CONVERSION; BACTERIA; FRACTION; BIOMASS; CARBON;
D O I
10.3390/fermentation8100556
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The biologically-derived polymers polyhydroxyalkanoates (PHAs) are biodegradable and can be considered a valuable alternative to conventional fossil-based plastics. However, upstream and downstream processes for PHA production are characterized by high energy and chemical consumption and are not economically competitive with petroleum-based polymers. Aiming to improve both the environmental and economical sustainability of PHAs production, in this work, corn straw was used as raw material to obtain a mixture of fermentable sugars after microwave-assisted flash hydrolysis (2 min, 0.01 g/L, 50.7% yield). A mixed microbial culture enriched from dairy industry waste was used for fermentation in a shake flask, allowing us to achieve good poly(hydroxy-butyrate-co-hydroxy-valerate) yields (41.4%, after 72 h of fermentation). A scale-up in a stirred tank bioreactor (3 L) gave higher yields (76.3%, after 96 h), allowing in both cases to achieve a concentration of 0.42 g/L in the fermentation medium. The possibility of producing PHAs from agricultural waste using a mixed microbial culture from the food industry with enabling technologies could make the production of biopolymers more competitive.
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页数:18
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