Use of ethanol production and stillage processing residues for biogas production
Laen...
Kuupäev
2019
Kättesaadav alates
Autorid
Dubrovskis, V.
Plume, I.
Straume, I.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
In Latvia, ethanol is produced mainly from wheat grains. The production process
involves the formation of the by-products of wheat bran, grains residues and stillage. By-products
from production of alcohol distilling dregs (stillage) contain much organic matter therefore could
be useful for the production of the biogas The product with high protein content usable for feed
can be produced from the stillage too. A liquid residue is formed during the production process.
Purpose of study is the assessment of the methane volume obtainable from the stillage processing
residue mixed with wheat brans and grains residues in anaerobic fermentation process and from
wheat brans and grains residues mixed only with inoculum. Investigation was provided in 16
bioreactors operated in batch mode at 38°C. Stillage processing residues mixed with the wheat
brans and inoculum were filled into 4 bioreactors, mixed with grains residues were filled into 4
bioreactors and only inoculum was filled into two bioreactors for control. Wheat brans with
inoculum were filled into 3 bioreactors. Into others 3 bioreactors were filled grains residues with
inoculum. The yield of biogas from wheat brans was 1.151 L g
-1
DOM and methane 0.593 L g
-1
DOM
after 30 days of anaerobic digestion. The yield of biogas from wheat brans with stillage processing
residue was 1.098 L g
-1
DOM and methane 0.600 L g
-1
DOM. The yield of biogas from grains residues
was 0.915 L g
-1
DOM and methane 0.451 L g
-1
DOM. The yield of biogas from grains residues with
stillage processing residue was 1.01 L g
-1
DOM and methane 0.523 L g
-1
DOM. The study
demonstrates that the investigated products are very good raw material for the production of
methane. Stillage processing residue acted as a catalyst for the process.
Kirjeldus
Article
Märksõnad
methane, stillage, anaerobic digestion, wheat brans, grains residues, stillage processing residue, articles