Dry‐Grind Process for Fuel Ethanol by Continuous Fermentation and Stripping

Taylor, Frank; Kurantz, Michael J.; Goldberg, Neil M.; McAloon, Andrew J.; Craig, James C.

doi:10.1021/bp0000297

Cited by 62 publications

(29 citation statements)

References 8 publications

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“…According to these results, the reduced tolerance to exogenous ethanol could be overcome for fuel ethanol production by using a fermentation and stripping process [19] if the ethanol in the fermentation medium is maintained at a concentration lower than 2 M. Although the rate of ethanol synthesis is slightly lower when C. tropicalis cells are immobilized, the cell recycling allows better productivity when ethanol production is desired, especially in a continuous fermentation system. We found that immobilized C. tropicalis cells remained physiologically stable after 20 cycles of fermentation (data not shown).…”

Section: Discussionmentioning

confidence: 99%

Physiological difference during ethanol fermentation between calcium alginate-immobilized Candida tropicalis and Saccharomyces cerevisiae

Jamai¹

2001

FEMS Microbiology Letters

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Calcium alginate-immobilized Candida tropicalis and Saccharomyces cerevisiae are compared for glucose fermentation. Immobilized C. tropicalis cells showed a slight morphological alteration during ethanol production at 40³C, but their fermentation capacity was reduced by 25%. Under immobilization conditions, the two species demonstrated two different mathematical patterns when the relationship between growth rate, respiration rate, and ethanol tolerance was assessed. The interspecific difference in behavior of immobilized yeast cells is mainly due to their natural metabolic preference. The production of CO 2 by calcium alginate-immobilized C. tropicalis, as well as the lower supply of oxygen to the cells, are the major factors that reduce ethanol production. ß

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Section: Discussionmentioning

confidence: 99%

Physiological difference during ethanol fermentation between calcium alginate-immobilized Candida tropicalis and Saccharomyces cerevisiae

Jamai¹

2001

FEMS Microbiology Letters

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“…An improvement in silage aerobic stability due to L. buchneri and enzyme combination has been reported for high moisture maize silage (Taylor et al, 2000) and barley silage (Kung & Ranjit, 2001). However, Ebling (2002) reported that the addition of enzymes showed no further improvement in aerobic stability compared with the effect of L. buchneri alone in high moisture silage.…”

Section: Introductionmentioning

confidence: 93%

Effects of a fibrolytic enzyme and bacterial inoculants on the fermentation, chemical composition and aerobic stability of ensiled potato hash

Mutavhatsindi¹,

Nkosi²,

Baloyi³

et al. 2018

SA J. An. Sci.

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The study was conducted to evaluate the effects of adding a fibrolytic enzyme in combination with bacterial inoculants on the fermentation, chemical composition and aerobic stability of ensiled potato hash (PH). Potato hash silage (PHS) was produced by mixing 800 g PH/kg and 200g wheat bran (WB)/kg. The mixture was ensiled with either no additive or enzyme Celluclast (low or high dose) or bacterial inoculants (Emsilage and Silosolve). These treatment combinations were produced: i) no additive (control); ii) Celluclast low dose (CLD); iii) Celluclast high dose (CHD); iv) Emsilage (EMS); v) CLD + EMS; vi) CHD + EMS; vii) Silosolve (SLS); viii) CLD + SLS; and ix) CHD + SLS. These treatments were ensiled in 81 x 1 L anaerobic jars for 90 days with nine replicates per treatment. Three samples per treatment were collected before ensiling and after 90 days' ensiling, were analysed for fermentation characteristics and chemical composition. In addition, samples of day 90 were subjected to an aerobic stability test, where they were exposed for five days. Enzyme addition reduced fibre, thus making more sugar available for fermentation. The combination of CHD and EMS reduced silage pH, thus preserving the silage compared with other treatment combinations. Enzyme addition (used at low and high dose), and bacterial inoculants improved fermentation. Enzyme addition improved the chemical composition, but impaired the aerobic stability of PHS. Further work to test these findings on animal performance is warranted.

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“…The total capital investment has been developed from the equipment costs through the use of equipment installation factors, and includes the supply and installation of the 20 process equipment and all support material such as piping, electrical, instrumentation, foundations, and buildings for the process equipment. Also included in the total capital investment is the cost of the facilities design and construction management plus a contingency allowance.…”

Section: Table 5 Capital Costs By Process Area (1999$)mentioning

confidence: 99%

Determining the cost of producing ethanol from corn starch and lignocellulosic feedstocks

McAloon¹,

Taylor²,

Yee³

et al. 2000

147

146

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Dry‐Grind Process for Fuel Ethanol by Continuous Fermentation and Stripping

Cited by 62 publications

References 8 publications

Physiological difference during ethanol fermentation between calcium alginate-immobilized Candida tropicalis and Saccharomyces cerevisiae

Physiological difference during ethanol fermentation between calcium alginate-immobilized Candida tropicalis and Saccharomyces cerevisiae

Effects of a fibrolytic enzyme and bacterial inoculants on the fermentation, chemical composition and aerobic stability of ensiled potato hash

Determining the cost of producing ethanol from corn starch and lignocellulosic feedstocks

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