Chin.J.Chem.Eng. ›› 2015, Vol. 23 ›› Issue (7): 1188-1193.doi: 10.1016/j.cjche.2015.04.016

• BIOTECHNOLOGY AND BIOENGINEERING • Previous Articles     Next Articles

Preliminary evaluation of five elephant grass cultivars harvested at different time for sugar production

Yuanyuan Li1, Yelong Zhang1, Hongbo Zheng1, Jian Du2, Hongman Zhang1, Juanzi Wu3, He Huang2   

  1. 1 College of Science, Nanjing Tech University, Nanjing 210009, China;
    2 China State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, China;
    3 Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
  • Received:2014-04-03 Revised:2014-07-10 Online:2015-07-28 Published:2015-08-21
  • Contact: Hongman Zhang
  • Supported by:

    Supported by Jiangsu Agriculture Science and Technology Innovation Fund (CX(11)4048).

Abstract: Five elephant grass cultivars, Pennisetum purpureum. cv. Huanan (Huanan), P. purpureum. cv. N51 (N51), P. purpureum. cv. Sumu No. 2 (Sumu-2), (Pennisetum americanum × P. purpureum) × P. purpureum cv. Guimu No. 1 (Guimu-1) and P. americanumcv. Tift23A × P. purpureum cv. Tift N51 (Hybrid Pennisetum), at three harvest stages were studied. With dilute sulfuric acid pretreatment followed by enzymatic hydrolysis, it is found that cellulose conversion of the five elephant grass cultivars harvested in August and September is higher than that harvested in October. The cellulose conversion for elephant grass cultivars harvested in August and September follows an order of Hybrid Pennisetum> Sumu-2> Huanan> Guimu-1> N51. This may be explained by the fact that lignification is gradually strengthened with time, inhibiting degradation of cellulose and hemicellulose. Moreover, cellulose conversions of Hybrid Pennisetum, Sumu-2 and Huanan harvested in August and September are higher based on hierarchical clustering results.

Key words: Energy crop, Elephant grass, Dilute sulfuric acid pretreatment, Enzymatic hydrolysis, Glucose