scholarly journals Comparison Studies on Two-Phase Methane Fermentation Processes Combined with Membrane Separation

1991 ◽  
Vol 14 (5) ◽  
pp. 312-321,299 ◽  
Author(s):  
Yoshinori YUSHINA ◽  
Jun HASEGAWA ◽  
Hiromi SATOH
Keyword(s):  
Membrane Separation ◽  
Methane Fermentation ◽  
Two Phase ◽  
Fermentation Processes

scholarly journals Analysis of ethanol dehydration using membrane separation processes

2020 ◽  
Vol 15 (1) ◽  
pp. 122-132 ◽  
Author(s):  
Carolina Conde-Mejía ◽  
Arturo Jiménez-Gutiérrez
Keyword(s):  
Capital Investment ◽  
Membrane Separation ◽  
Biomass Pretreatment ◽  
Ethanol Dehydration ◽  
Purification Step ◽  
Silica Membrane ◽  
Separation Processes ◽  
Fermentation Processes ◽  
Vapor Permeation ◽  
Type Zeolite

AbstractAfter the biomass pretreatment and fermentation processes, the purification step constitutes a major task in bioethanol production processes. The use of membranes provides an interesting choice to achieve high-purity bioethanol. Membrane separation processes are generally characterized by low energy requirements, but a high capital investment. Some major design aspects for membrane processes and their application to the ethanol dehydration problem are addressed in this work. The analysis includes pervaporation and vapor permeation methods, and considers using two types of membranes, A-type zeolite and amorphous silica membrane. The results identify the best combination of membrane separation method and type of membrane needed for bioethanol purification.

scholarly journals Study of a Two-phase Methane Fermentation System Equipped with Solubilization Treatment

2013 ◽  
Vol 42 (4) ◽  
pp. 235-244
Author(s):  
Kazumasa TONOOKA ◽  
Takuya EBISAWA ◽  
Akihiro NAGANO ◽  
Akihiro OHNISHI ◽  
Naoshi FUJIMOTO ◽  
...  
Keyword(s):  
Methane Fermentation ◽  
Two Phase ◽  
Fermentation System

Analysis of continuous fermentation processes in aqueous two-phase systems

1992 ◽  
Vol 7 (7) ◽  
pp. 315-317 ◽  
Author(s):  
A. B. Jarzębski ◽  
J. J. Malinowski ◽  
G. Goma ◽  
P. Soucaille
Keyword(s):  
Continuous Fermentation ◽  
Two Phase ◽  
Fermentation Processes ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

Rapid-rate thermophilic, single-stage and two-phase methane fermentation of synfuel-industry wastewaters

2001 ◽  
Vol 43 (1) ◽  
pp. 35-42
Author(s):  
S. Ghosh ◽  
D. Jerger ◽  
M. P. Henry ◽  
A. Sajjad
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Hydrolytic Degradation ◽  
Single Stage ◽  
Methane Yield ◽  
Residence Times ◽  
Rapid Rate ◽  
Methane Fermentation ◽  
Two Phase ◽  
End Products

Thermophilic (55°C) anaerobic digestion of wastewaters from wet carbonization of Minnesota peat was conducted in a simple, upflow digester at an HRT of one day to provide a methane yield of 0.20 SCM/kg VS added and a BOD5 reduction of 85%. Carbonization of Maine peat conducted for a much longer duration of thermal treatment produced recalcitrant and potentially toxic end products that reduced the biodegradability of wastewaters. Methane fermentation of the Maine-peat wet-carbonization waste was inhibited at an HRT of one day in the single-stage digester. However, two-phase digestion with separate acid-phase fermentation to promote hydrolytic degradation of toxic end products followed by separate methane fermentation at an HRT of 2 days exhibited a methane yield of 0.21 SCM/kg VS added and a BOD5 reduction of 76%. Volatile fatty acids profiles along the depths digesting cultures indicated that single-stage and two-phase digestion could be accomplished at one-half the reactor residence times (one day for single-stage and three days for two-phase) used in this research.

Anaerobic digestion of coffee waste by two-phase methane fermentation with slurry-state liquefaction

1994 ◽  
Vol 77 (3) ◽  
pp. 335-338 ◽  
Author(s):  
Kenji Kida ◽  
Ikbal ◽  
Motowo Teshima ◽  
Yorikazu Sonoda ◽  
Kouhei Tanemura
Keyword(s):  
Anaerobic Digestion ◽  
Methane Fermentation ◽  
Two Phase ◽  
Coffee Waste

A comparative study of anaerobic digestion of food waste in a single pass, a leachate recycle and coupled solid/liquid reactors

2003 ◽  
Vol 47 (1) ◽  
pp. 319-324 ◽  
Author(s):  
H.L. Xu ◽  
J.Y. Wang ◽  
H. Zhang ◽  
J.H. Tay
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Methane Content ◽  
Anaerobic Sludge ◽  
Methane Fermentation ◽  
Two Phase ◽  
Single Pass ◽  
Digestion Process ◽  
Solid Liquid ◽  
Methanogenic Phase

A single pass reactor (R1), a leachate recycle reactor (R2) and a coupled solid/liquid bioreactor (R3-Rm) for anaerobic digestion of food waste were comparatively investigated in terms of digestion process and treatment efficiency. The coupled solid/liquid bioreactor is an enhanced two-phase system and distinctive from a traditional two-phase process with an upflow anaerobic sludge blanket (UASB) reactor as the methanogenic phase and a circulation of treated leachate between the acidification and methanogenic phases. In comparison with R1 and R2, R3-Rm enhanced the digestion process and increased the methane content of biogas. 100% of the R3-Rm methane yield was from the methanogenic phase with average methane content of 71%. The significant enhancement was also confirmed by the removal of 79% of total organic carbon (TOC), 60% of volatile solids (VS) and 80% of total COD in 12 days running of R3-Rm. However, no active methane fermentation was detected in R1 and R2 during 60 days operation. The results in this laboratory-scale study show that the rapid accumulation of volatile fatty acids (VFAs) due to the rapid acidification of food waste inhibits the development of effective methane fermentation in single pass and leachate recycle reactors. The coupled solid/liquid bioreactor is more efficient in converting food waste into methane and carbon dioxide.

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