Improved Ethanol Production Through Anaerobic Thermophilic Co-Culture From Various Carbohydrates

International Congress on Energy 2011
2011 AIChE Annual Meeting
AIChE Annual Meeting
October 17, 2011 - 8:00pm

Saccharification of fermentable sugars is one of the most critical steps in producing bio-ethanol from lignocellulosics through Consolidate Bioprocessing (CBP). However, the extreme pH and ethanol concentration are commonly considered to be the potential inhibitory factors for the application of clostridium sp. in CBP. The fermentation of several saccharides derived from lignocellulosic biomass was investigated in an anaerobic thermophilic co-culture consisting of Clostridium themocellum and Clostridium thermolacticum under various fermentation conditions. Alkali proved to be more favorable for the ethanol production utilizing lignocellulosics. Inhibitions of fermentation were observed at high ethanol concentrations and extreme pH values. However, the addition of low levels of ethanol showed an unexpected stimulatory impact on final ethanol productions for co-culture under selected conditions. This co-culture was able to actively ferment glucose, xylose, cellulose hemicellulose and micro-crystallized cellulose (MCC). The ethanol yield observed in co-culture is higher than in their mono-cultures. Especially in MCC fermentation, over two-fold increase was observed in ethanol production as compared to the mono-cultures. The highest ethanol yield was observed as 75% (w/w) for MCC and 90% (w/w) for xylose of the theoretical maximum yield.
Professional Development Hours
0.5 PDHs
You will be able to download and print a certificate for these PDH credits once the content has been viewed. If you have already viewed this content, please click here to login.
Presenter(s): 

Would you like to access this content?

No problem. You just have to complete the following steps.

You have completed 0 of 2 steps.

  1. Log in

    You must be logged in to view this content. Log in now.

  2. Purchase Technical Presentation

    You must purchase this technical presentation using one of the options below.
    If you already purchased this content recently, please click here to refresh the system's record of ownerships.

Pricing

Credits 0.5 Use credits
List Price $25.00 Buy now
AIChE Members $15.00 Buy now
AIChE Undergraduate Student Members Free Free access
AIChE Graduate Student Members $15.00 Buy now