Application of low-cost algal nitrogen source feeding in fuel ethanol production using high gravity sweet potato medium

2012 ◽  
Vol 160 (3-4) ◽  
pp. 229-235 ◽  
Author(s):  
Yu Shen ◽  
Jin-Song Guo ◽  
You-Peng Chen ◽  
Hai-Dong Zhang ◽  
Xu-Xu Zheng ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Nitrogen Source ◽  
Sweet Potato ◽  
Low Cost ◽  
Fuel Ethanol ◽  
High Gravity

Very High Gravity Fermentation Using Sweet Potato for Fuel Ethanol Production

2011 ◽  
Vol 236-238 ◽  
pp. 59-62 ◽  
Author(s):  
Yu Shen ◽  
Hai Dong Zhang ◽  
Xu Xu Zheng ◽  
Xian Ming Zhang ◽  
Jin Song Guo ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Sweet Potato ◽  
Ethanol Fermentation ◽  
Fuel Ethanol ◽  
High Rate ◽  
Polluted Water ◽  
High Gravity ◽  
Very High Gravity ◽  
Very High Gravity Fermentation ◽  
Very High

Sweet potato (Ipomoea batatas) was a wildely planted root crop in most area of China and considered as a good feedstock for fuel ethanol production. Very high gravity ethanol fermentation technology exhibited promising industrial application for advantages including productivity improvement, polluted water output reduction and energy consumption saving. In this study very high gravity liquefied sweet potato mash containing 260 g/kg glucose (after fully saccharified) was used for fuel ethanol fermentation. 0.8 g/kg (dry matter weight) was proved as the optimum glucoamylase adding dosage in simultaneous saccharification and fermentation. Datas analysis indicated that the osmotic pressure was controlled strictly exhibited by high growth rate of yeast and high rate of ethanol formation comparing with other dosages, and 119.78 g/kg (15.07 %, v/v) ethanol equivalent to 90.16 % of theoretical yield was achieved in 64 hours.

Energy-saving direct ethanol production from viscosity reduction mash of sweet potato at very high gravity (VHG)

2010 ◽  
Vol 91 (12) ◽  
pp. 1845-1850 ◽  
Author(s):  
Liang Zhang ◽  
Qian Chen ◽  
Yanlin Jin ◽  
Huilin Xue ◽  
Jiafa Guan ◽  
...  
Keyword(s):  
Energy Saving ◽  
Ethanol Production ◽  
Sweet Potato ◽  
Viscosity Reduction ◽  
High Gravity ◽  
Very High Gravity ◽  
Very High

Starch saccharification and fermentation of uncooked sweet potato roots for fuel ethanol production

2013 ◽  
Vol 128 ◽  
pp. 835-838 ◽  
Author(s):  
Peng Zhang ◽  
Caifa Chen ◽  
Yanhu Shen ◽  
Tielin Ding ◽  
Daifu Ma ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Sweet Potato ◽  
Fuel Ethanol ◽  
Starch Saccharification

Effects of Glucose Releasing Rate on Cell Growth and Performance of Simultaneous Saccharification and Fermentation (SSF) in Sweet Potato Medium for Fuel Ethanol Production Using Saccharomyces cerevisiae

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Yu Shen ◽  
Jin-song Guo ◽  
You-Peng Chen ◽  
Hai-Dong Zhang ◽  
Xu-Xu Zheng ◽  
...  
Keyword(s):  
Cell Growth ◽  
Growth Inhibition ◽  
Ethanol Production ◽  
Sweet Potato ◽  
Glucose Concentration ◽  
Simultaneous Saccharification And Fermentation ◽  
Early Stage ◽  
Fuel Ethanol ◽  
And Performance ◽  
Simultaneous Saccharification

Abstract Sweet potato medium containing 230.0 g•kg-1 liquefied starch was used for simultaneous saccharification and fermentation (SSF) for fuel ethanol production. Glucose releasing rate was controlled by the initial addition of incremental glucoamylase. The increasing rates of glucose concentration display a positive relationship when glucoamylase is added in early stage (0 to 8 hours (h)). Serious cells growth inhibition occurred in the early stage when 1.0 g•kg-1 glucoamylase is added, whereas glucose providing limitation occurred in the batch with 0.2 g•kg-1 glucoamylase added in later stage (64 to 80 h). The optimum dosage of glucoamylase was 0.8 g•kg-1, where a final ethanol concentration of 118.2 g•kg-1 was attained within 72 h. The results of our study suggest cell growth inhibition and substrate providing limitation can be avoided simultaneously by adding a proper dosage of glucoamylase. It is indicated further that cells growth inhibition in early stage in the batch with 1.0 g•kg-1 glucoamylase added was due to the high increasing rate of initial glucose concentration, but not the high overall glucose concentration.

Surface interaction of sweet potato peels (Ipomoea batata) with Cd(II) and Pb(II) ions in aqueous medium

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Aqueous Medium ◽  
Sweet Potato ◽  
Adsorption Process ◽  
Low Cost ◽  
Correlation Coefficients ◽  
Order Kinetic ◽  
Thermodynamic Evaluation ◽  
Dissociative Mechanism ◽  
Pseudo Second Order ◽  
Potato Peels

The removal of Cd(II) and Pb(II) ions from aqueous medium was studied using potato peels biomass. The adsorption process was evaluated using Atomic Absorption Spectrophotometer (AAS). The Vibrational band of the potato peels was studied using Fourier Transform Infrared Spectroscopy (FTIR). The adsorption process was carried out with respect to concentration, time, pH, particle size and the thermodynamic evaluation of the process was carried at temperatures of 30, 40, 50 and 60(0C), respectively. The FTIR studies revealed that the potato peels was composed of –OH, -NH, –C=N, –C=C and –C-O-C functional groups. The optimum removal was obtained at pH 8 and contact time of 20 min. The adsorption process followed Freundlich adsorption and pseudo second-order kinetic models with correlation coefficients (R2) greater than 0.900. The equilibrium adsorption capacity showed that Pb(II) ion was more adsorbed on the surface of the potato peels biomass versus Cd (II) ion (200.91 mg/g > 125.00 mg/g). The thermodynamic studies indicated endothermic, dissociative mechanism and spontaneous adsorption process. This study shows that sweet potato peels is useful as a low-cost adsorbent for the removal of Cd(II) and Pb(II) ions from aqueous medium.

Rapid Ethanol Production from Fresh Sweet Potato

2010 ◽  
Vol 2009 (3) ◽  
pp. 405-409
Author(s):  
Naikun SHEN ◽  
Hai ZHAO ◽  
Mingzhe GAN ◽  
Yanling JIN ◽  
Lingling ZHOU ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Sweet Potato
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