Caproic acid production from acid whey via open culture fermentation -Evaluation of the role of electron donors and downstream processing

被引：55

作者：

Chwialkowska, Joanna ^{[1
]}

Duber, Anna ^{[1
]}

Zagrodnik, Roman ^{[2
]}

Walkiewicz, Filip ^{[3
]}

Lezyk, Mateusz ^{[1
]}

Oleskowicz-Popiel, Piotr ^{[1
]}

机构：

[1] Poznan Univ Tech, Fac Civil & Environm Engn, Inst Environm Engn, Berdychowo 4, PL-60965 Poznan, Poland

[2] Adam Mickiewicz Univ, Fac Chem, Dept Kinet & Catalysis, Umultowska 89 B, PL-61614 Poznan, Poland

[3] Poznan Univ Tech, Fac Chem Technol, Berdychowo 4, PL-60965 Poznan, Poland

来源：

BIORESOURCE TECHNOLOGY | 2019年 / 279卷

关键词：

Chain elongation; Liquid-liquid extraction; Anaerobic open culture fermentation; Ionic liquids; Techno-economic analysis; VOLATILE FATTY-ACIDS; CHAIN CARBOXYLIC-ACIDS; N-CAPROATE; ANAEROBIC FERMENTATION; WASTE-WATER; EXTRACTION; ELONGATION; CONVERSION; RECOVERY; LACTATE;

D O I：

10.1016/j.biortech.2019.01.086

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The objective of this study was to investigate the potential of supplementing ethanol and lactic acid as electron donors in reverse beta-oxidation for short chain carboxylic acids chain elongation during anaerobic fermentation of acid whey. Best results were achieved when lactic acid was added at concentration of 300 mM. It resulted in medium chain carboxylic acids (MCCAs) concentration of 5.0 g/L. In the trials with ethanol addition, the overall yield was 20% lower. Subsequently liquid-liquid extraction with ionic liquids (ILs) was investigated as a potential purification method of caproic acid. The most promising, with respect to recovery of caproic acid, was piperazinium IL [C(1)C(1)C(10)Ppz][NTF2], however, the selectivity was only 0.39. Less effective [C(1)C(1)C(6)Ppz][NTF2] recovered 85.9% of caproic acid while reaching a higher selectivity of 0.53. Technoeconomic model revealed that to meet the conservative value of $2.25 per kg of caproic acid, the downstream processing should not exceed $0.65 per kg.

引用

页码：74 / 83

页数：10

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