Potential use of feedlot cattle manure for bioethanol production

被引：35

作者：

Vancov, T. ^{[1
]}

Schneider, R. C. S. ^{[2
]}

Palmer, J. ^{[1
]}

McIntosh, S. ^{[1
]}

Stuetz, R. ^{[3
]}

机构：

[1] Wollongbar Primary Ind Inst, NSW Dept Primary Ind, Wollongbar, NSW, Australia

[2] Univ Santa Cruz do Sul, Dept Chem & Phys, BR-96815900 Santa Cruz Do Sul, RS, Brazil

[3] Univ New S Wales, Sch Civil & Environm Engn, Sydney, NSW 2052, Australia

来源：

BIORESOURCE TECHNOLOGY | 2015年 / 183卷

关键词：

Anaerobic digestate; Cellic (R) CTec 2 saccharification; Ethanol fermentation; Feedlot cattle manure; Dilute-acid pretreatment; DAIRY MANURE; ENZYMATIC-HYDROLYSIS; ETHANOL-PRODUCTION; ANAEROBIC-DIGESTION; ACID PRETREATMENT; CORN STOVER; CELLULOSE; NITROGEN; XYLAN; SACCHARIFICATION;

D O I：

10.1016/j.biortech.2015.02.027

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This paper reports on processing options for the conversion of feedlot cattle manures into composite sugars for ethanol fermentation. Small-scale anaerobic digestion trials revealed that the process significantly reduces the content of glucan and xylan (ca. 70%) without effecting lignin. Moreover, anaerobic digestate (AD) fibres were poor substrates for cellulase (Cellic (R) CTec 2) saccharification, generating a maximum combined sugar yield of ca. 12% per original dry weight. Dilute acid pretreatment and enzyme saccharification of raw manures significantly improved total sugar recoveries, totalling 264 mg/g (79% theoretical). This was attained when manures were pretreated with 2.5% H2SO4 for 90 min at 121 degrees C and saccharified with 50 FPU CTec 2/g glucan. Saccharomyces cerevisiae efficiently fermented crude hydrolysates within 6 h, yielding 7.3 g/L ethanol, representing glucose to ethanol conversion rate of 70%. With further developments (i.e., fermentation of xylose), this process could deliver greater yields, reinforcing its potential as a biofuel feedstock. Crown Copyright (C) 2015 Published by Elsevier Ltd. All rights reserved.

引用

页码：120 / 128

页数：9

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