Volatile fatty acids production from protease pretreated Chlorella biomass via anaerobic digestion

被引：23

作者：

Antonio Magdalena, Jose ^{[1
]}

Tomas-Pejo, Elia ^{[1
]}

Ballesteros, Mercedes ^{[1
,2
]}

Gonzalez-Fernandez, Cristina ^{[1
]}

机构：

[1] IMDEA Energy, Biotechnol Proc Unit, Madrid, Spain

[2] CIEMAT, Biofuels Unit, Madrid, Spain

来源：

BIOTECHNOLOGY PROGRESS | 2018年 / 34卷 / 06期

关键词：

volatile fatty acids; biogas; microalgae; protease; anaerobic digestion; BIOGAS PRODUCTION; WASTE-WATER; FERMENTATION; METHANE; VULGARIS; DEGRADATION; SUBSTRATE;

D O I：

10.1002/btpr.2696

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：

Volatile fatty acids (VFAs) produced via anaerobic digestion (AD) are regarded as a low cost production process of building blocks of interest for the chemical industry. In this study, VFAs and methane production were assessed in batch reactors at different temperature ranges (psychrophilic 25 degrees C, mesophilic 35 degrees C, thermophilic 50 degrees C) and different pH values (5.5 and 7.5) using protease pretreated Chlorella sp. biomass as substrate. Acetic acid and propionic acid were the most abundant products (up to 73% of the total VFAs) during the first days independently of the conditions. VFAs concentration decreased over time as methane was produced after a lag phase of 7-10 days. Results showed that best conditions for VFAs production were mesophilic temperature ranges (35 degrees C) at neutral initial pH values (7.5), and psychrophilic temperature ranges (25 degrees C) at low initial pH values (5.5) which resulted in a conversion of the initial COD into VFAs of 48%, respectively. (c) 2018 American Institute of Chemical Engineers Biotechnol.

引用

页码：1363 / 1369

页数：7

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