Anaerobic co-digestion of pig manure and algae: Impact of intracellular algal products recovery on co-digestion performance

被引：116
作者：
Astals, S. [1 ]
Musenze, R. S. [1 ]
Bai, X. [2 ]
Tannock, S. [1 ,3 ]
Tait, S. [1 ]
Pratt, S. [2 ]
Jensen, P. D. [1 ]
机构：
[1] Univ Queensland, Adv Water Management Ctr, Brisbane, Qld 4072, Australia
[2] Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia
[3] Univ Queensland, Sch Agr & Food Sci, Brisbane, Qld 4072, Australia
来源：
BIORESOURCE TECHNOLOGY | 2015年 / 181卷
关键词：
Anaerobic digestion; Codigestion; Microalgae; Biorefinery; Pre-treatment; TAIHU BLUE ALGAE; METHANE PRODUCTION; LIPID EXTRACTION; MICROALGAE; PRETREATMENT; FERMENTATION; CODIGESTION; HYDROLYSIS; MACROALGAE; BIOMASS;
D O I：
10.1016/j.biortech.2015.01.039
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This paper investigates anaerobic co-digestion of pig manure and algae (Scenedesmus sp.) with and without extraction of intracellular algal co-products, with views towards the development of a biorefinery concept for lipid, protein and/or biogas production. Protein and/or lipids were extracted from Scenedesmus sp. using free nitrous acid pre-treatments and solvent-based Soxhlet extraction, respectively. Processing increased algae methane yield between 29% and 37% compared to raw algae (VS basis), but reduced the amount of algae available for digestion. Co-digestion experiments showed a synergy between pig manure and raw algae that increased raw algae methane yield from 0.163 to 0.245 m(3) CH4 kg(-1) VS. No such synergy was observed when algal residues were co-digested with pig manure. Finally, experimental results were used to develop a high-level concept for an integrated biorefinery processing pig manure and onsite cultivated algae, evaluating methane production and co-product recovery per mass of pig manure entering the refinery. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：97 / 104
页数：8
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