Archaea inhibition: Strategies for the enhancement of volatile fatty acids production from microalgae

被引:16
作者
Antonio Magdalena, Jose [1 ]
Gonzalez-Fernandez, Cristina [1 ]
机构
[1] IMDEA Energy, Biotechnol Proc Unit, Madrid, Spain
关键词
Anaerobic sludge; Sludge pretreatment; Anaerobic digestion; Volatile fatty acids; Microalgae; ANAEROBIC-DIGESTION; METHANOGENIC INHIBITORS; BIOHYDROGEN PRODUCTION; HYDROGEN-PRODUCTION; CHLORELLA-VULGARIS; BIOGAS PRODUCTION; ORGANIC FRACTION; FOOD WASTE; FERMENTATION; PRETREATMENT;
D O I
10.1016/j.wasman.2019.10.044
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In the present study, anaerobic sludge was subjected to thermal and chemical pretreatments to favour VFAs production from a protein-rich waste (i.e. microalgae biomass). Sludge pretreatments have been previously used in hydrogen production; however, information about how they can affect VFAs production from microalgae is still lacking. Thermal pretreatment was studied at: (i) 80 degrees C for 10 and 30 min; (ii) 120 degrees C for 10 and 30 min; and (iii) 100 degrees C for 20 min. 2-bromoethanesulfonate (BES) at 10 mM and 30 mM was used as chemical pretreatment. Besides, a combination of both pretreatment methods (80 degrees C and 120 degrees C at 10 mM and 30 mM BES) was also tested. Thermal pretreatment increased organic matter conversions into VFAs (up to 71% COD-VFAs/CODin) when compared to control values (40% in the untreated anaerobic sludge). Acetic acid was the most abundant VFAs at high temperatures (120 degrees C) and when BES was employed (up to 60% and 40%, respectively, in terms of COD). On the other hand, propionic acid was the most abundant product at low temperatures and in the untreated anaerobic sludge (up to 60% in terms of COD). This research work might set guidelines in order to choose a suitable sludge pretreatment for VFAs production from microalgae. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码:222 / 230
页数:9
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