A comparative study on biochemical methane potential of algal substrates: Implications of biomass pre-treatment and product extraction

被引：14

作者：

Ansari, Faiz Ahmad ^{[1
]}

Wahal, Shantanu ^{[1
]}

Gupta, Sanjay Kumar ^{[1
,2
]}

Rawat, Ismail ^{[1
]}

Bux, Faizal ^{[1
]}

机构：

[1] Durban Univ Technol, Inst Water & Wastewater Technol, POB 1334, ZA-4000 Durban, South Africa

[2] Indian Inst Technol Delhi, Dept Civil Engn, Environm Engn, New Delhi 110016, India

来源：

BIORESOURCE TECHNOLOGY | 2017年 / 234卷

基金：

新加坡国家研究基金会;

关键词：

Algae; Lipid extracted algae; Proteins extracted algae; Sludge; Biomethane; ANAEROBIC-DIGESTION; MICROALGAL BIOMASS; THERMAL PRETREATMENT; BIODIESEL PRODUCTION; RESIDUES; PROTEIN; BIOREFINERY; BIOMETHANE;

D O I：

10.1016/j.biortech.2017.03.068

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Dried powdered algae (SDPA), heat treated algae (MHTA), lipid extracted algae (LEA) and protein extracted algae (PEA) were digested to determine biomethane potential. The average CH4 production rate was similar to 2.5-times higher for protein and lipid extracted algae than for whole algae (SDPA and MHTA) whilst the cumulative CH4 production was higher for pre-treated algae. Highest cumulative CH4 production (318.7 ml CH4 g(1) VS) was observed for MHTA followed by SDPA (307.4 ml CH4 g(1) VS). CH4/CO2 ratios of 1.5 and 0.7 were observed for MHTA and LEA respectively. Pre-treatment processes disrupted the algal cell wall, exposing intracellular material which remained intact as opposed to product extraction processes which broke down the intracellular compounds resulting in changes in elemental composition and decreases the cumulative gas yield and CH4/CO2 ratio. Comparative analysis determined that the most profitable route of biomass utilisation was protein extraction followed by biogas production giving similar to 2.5-times higher return on investment. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：320 / 326

页数：7

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