BioChem - DOS

Biogas production within the bioethanol production chain: Use of co-substrates for anaerobic digestion of sugar beet vinasse

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Moraes, B.S.; Triolo, J.M.; Lecona, V.P.; Zaiat, M.; Sommer, S.G.

Bioethanol production generates large amounts of vinasse, which is suitable for biogas production. In this study, the anaerobic digestion of sugar beet vinasse was optimised using continuous stirred-tank reactors (CSTR) supplemented either with lime fertiliser or with 3% cow manure. In both reactors, the C/N ratio was adjusted by adding straw. The biochemical methane potential (BMP) of vinasse was 267.4+/-4.5LCH<SUB>4</SUB>kgVS<SUP>-1</SUP>. Due to the low content of macro- and micronutrients and low C/N ratio of vinasse, biogas production failed when vinasse alone was fed to the reactor. When co-substrate was added, biogas production achieved very close to the BMP of vinasse, being 235.7+/-32.2LCH<SUB>4</SUB>kgVS<SUP>-1</SUP> from the fertiliser supplied reactor and 265.2+/-26.8LCH<SUB>4</SUB>kgVS<SUP>-1</SUP> in manure supplied reactor at steady state. Anaerobic digestion was the most stable when cow manure was supplied to digestion of vinasse.

2015

Elsevier Applied Science

0960-8524

190

pp.227-234

10.1016/j.biortech.2015.04.089

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART72187283

Co-digestion; Sugar beet vinasse; Cow manure; C/N ratio; Continuous stirred tank reactor (CSTR)