BioChem - DOS

Cost-effective sequential biogas and bioethanol production from the cotton stem waste

Process safety and environmental protection : transactions of the Institution of Chemical Engineers, Part B

Patel, Vipul R.

<P><B>Abstract</B></P> <P>The objective of this study was to characterize and evaluate a wild inedible cotton waste as feedstock for bioenergy production. The conversion of organics of cotton stem into bioenergy could serve the dual role of renewable energy production and waste reduction. Composition analysis demonstrated that cotton stem is a suitable feedstock for both bioethanol and biogas production. Anaerobic digestion of cotton stem achieved 40.35% total biogas with 12.76% increased net CH<SUB>4</SUB> volume compared to co-digestion of cotton stem with buffalo dung. Undigested cotton stem residues from anaerobic digestion were directly subjected to sequential alkali-acid pretreatment for conversion into ethanol with a yield of 325Lt<SUP>&minus;1</SUP> or 50% of theoretical yield. Mechanical and thermal energy consumption for pretreatment were determined the efficiency of sugar recoveries and net energy production values. Overall 2.88&plusmn;0.25GJ more energy production in sequential anaerobic digestion-simultaneously saccharification fermentation (SSF) over direct SSF of cotton stem waste was observed.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

2017

Elsevier

0957-5820

111

pp.335-345

10.1016/j.psep.2017.07.019

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART78804757

Biomethanation; Biogas; Bio-ethanol; Cotton stem waste; Agro-waste; GC&#x2013; MS;