INFLUENCE USING POTATO AS CO-SUBSTRATE ON ACIDIFICATION FERMENTATION AND BIOGAS YIELDS OF Spartina alterniflora
Influences of anaerobic co-digestion of Spartina alterniflora, a lignocellulosic biomass, with potato on acidification fermentation of S. alterniflora and its biogas yields were investigated by anaerobic batch digestion experiments conducted at S. alterniflora to potato ratio of 6:1, 7:1 and 9:1 at 35℃. The results indicated that the acidification fermentation for co-digestion was butyrate type compared with that of propionate type for digestion of pure S. alterniflora, and the total VFAs concentrations for co-digestion increased more than two times compared with that of digestion of pure S. alterniflora. The concentration order of major individual VFAs produced in co-digestion was acetate > propionate > butyrate, which was different from butyrate > acetate > propionate for digestion of potato and propionate > acetate > butyrate for digestion of S. alterniflora. The results also indicated that the co-digestion at S. alterniflora to potato ratio of 6:1 was optimal, with the biogas yield of 460 ml/g VS, an increase of 27.4％ compared with 361 ml/g VS obtained in digestion of pure S. alterniflora. In addition, the average methane content of the biogas from co-digestion ranged between 60％ and 63％, which was higher than that of 57％ obtained in digestion of pure S. alterniflora. It was concluded that great changes of VFAs were obtained for co-digestion compared with digestion of pure substrate, and in general, these changes were beneficial to improve biogas yield and biogas quality ofS. alterniflora.
Anaerobic co-digestion Biogas Potato Volatile fatty acids Spartina alterniflora
Ji-hong LI Shi-guan YANG Zheng Zheng Xing-xing Zou
State Key Laboratory of Pollution Control and Resource Reuse,School of the Environment,Nanjing Unive State Key Laboratory of Pollution Control and Resource Reuse,School of the Environment,Nanjing Unive
国际会议
广州
英文
1382-1388
2008-12-03（万方平台首次上网日期，不代表论文的发表时间）