The Effect of Digested Manure on Biogas Productivity and Microstructure Evolution of Corn Stalks in Anaerobic Cofermentation

BioMed Research International
Zongyan LvDalei Zhang

Abstract

The anaerobic fermentation of crop straw and animal wastes is increasingly used for the biogas and green energy generation, as well as reduction of the environmental pollution. The anaerobic cofermentation of corn stalks inoculated by cow dung was found to achieve higher biogas production and cellulose biodegradation. In this study, the effect of mixing corn stalks with cow dung at five different fermentation stages (0, 7, 15, 23, and 31 days of the total fermentation cycle of 60 days) on the further cofermentation process was explored, in order to optimize the corn straw utilization rate and biogas production capacity. In addition, the straw microstructure evolution was investigated by the SEM and XRD methods to identify the optimal conditions for the straw biodegradation process enhancement. The five test groups exhibited nearly identical total biogas productivity values but strongly differed by daily biogas yields (the maximal biogas generation rate being 524.3 ml/d). Based on the degradation characteristics of total solids (TS), volatile solids (VS), and lignocellulose, groups #1 and #3 (0 and 15 days) had the most significant degradation rates of VS (43.73%) and TS (42.07%), respectively, while the largest degradation rate...Continue Reading

References

Jan 2, 2009·Microbiology·Christofer KarlssonInga-Maria Frick
Feb 14, 2009·Applied Biochemistry and Biotechnology·Rongping LiXiujiu Li
Jun 23, 2009·Bioresource Technology·Mingxia ZhengYanfeng He
Feb 9, 2010·Bioresource Technology·Hamed M El-Mashad, Ruihong Zhang
Sep 1, 1994·World Journal of Microbiology & Biotechnology·D Somayaji, S Khanna

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Methods Mentioned

BETA
X-ray
scanning electron microscopy

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