期刊
BIOMASS CONVERSION AND BIOREFINERY
卷 12, 期 2, 页码 419-426出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s13399-020-00703-3
关键词
Microalgal biofuels; Biomethane; Value compounds; Biorefinery
资金
- European Regional Development Fund of the European Union
- Greek national funds through the Operational Program Competitiveness, Entrepreneurship and Innovation, under the call RESEARCH -CREATE -INNOVATE [T1EDK-02142]
- Erasmus+ program
This study investigated the effect of chemical extraction and removal of valuable fractions on the methane yield of residual microalgal biomass used as feedstock for biogas production. The results showed that the recovery and removal of valuable compounds did not significantly affect the methane yield, but lipid extraction led to changes in methane production kinetics.
Biorefinery concepts that combine several valorization pathways, including both bioproducts and bioenergy/biofuels, are of high interest in order to maximize the economic value of microalgal cultivation systems. In this study, the residual biomass obtained from the microalga Chlorella vulgaris following the chemical extraction of a valuable fraction consisting of either chlorophyll, proteins, or lipids was used as feedstock for biogas production in a laboratory-scale biochemical methane potential (BMP) assay performed in batch mode. The main aim of this study is to assess the effect of chemical extraction and removal of valuable fractions on the methane yield of residual microalgal biomass. The dry weight ratio of residual biomass to total biomass was 0.54 g/g after lipid extraction, 0.62 g/g after chlorophyll extraction, and 0.42 g/g after protein extraction. The methane yields of raw microalgae as well as residual microalgal biomass after lipid, chlorophyll, or protein extraction and removal were in the range 207-237 mL CH4/g volatile solids. Differences in the methane yields were not statistically significant. Hence, the recovery and removal of valuable compounds did not have a significant impact on the final methane yields of microalgal biomass by anaerobic digestion. Nevertheless, the methane production kinetics of residual microalgal biomass after lipid extraction displayed a diauxic pattern, possibly due to the inhibition of methanogenic bacteria by chloroform used as extraction solvent. This suggests that solvent toxicity must be considered when applying anaerobic digestion as a downstream process in biomass-based biorefineries.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据