Low-cost additive improved silage quality and anaerobic digestion performance of napiergrass

Li Lianhua; Zhen Feng; Sun Yongming; Yuan Zhenhong; Kong Xiaoying; Zhou Xianyou; Niu Hongzhi

doi:10.1016/j.biortech.2014.09.011

Low-cost additive improved silage quality and anaerobic digestion performance of napiergrass

Bioresour Technol. 2014 Dec:173:439-442. doi: 10.1016/j.biortech.2014.09.011. Epub 2014 Sep 16.

Authors

Li Lianhua¹, Zhen Feng¹, Sun Yongming¹, Yuan Zhenhong², Kong Xiaoying¹, Zhou Xianyou¹, Niu Hongzhi¹

Affiliations

¹ Guangzhou Institute of Energy Conversion, CAS Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, China.
² Guangzhou Institute of Energy Conversion, CAS Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, China. Electronic address: yuanzh@ms.giec.ac.cn.

PMID: 25443806
DOI: 10.1016/j.biortech.2014.09.011

Abstract

Effects of molasses-alcoholic wastewater on the ensiling quality of napiergrass were investigated at ambient temperature, and its anaerobic digestion performance was assessed at mesophilic temperature. Results showed that the molasses-alcoholic wastewater had positive effect on silage quality and anaerobic digestion performance. Lower pH values of 5.20-5.28, lower NH3-N contents of 32.65-36.60 g/kg and higher lactic acid contents of 56-61 mg/kg FM were obtained for the silage samples with molasses-alcoholic wastewater addition. Higher specific biogas yield of 273 mL/g VS was obtained for the sample with 11% molasses-alcoholic wastewater added. Therefore 11% molasses-alcoholic wastewater addition was recommended.

Keywords: Anaerobic digestion; Low-cost additive; Molasses-alcoholic wastewater; Napiergrass; Silage.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Anaerobiosis
Bioreactors*
Molasses
Poaceae / metabolism*
Temperature
Wastewater / chemistry*

Substances

Waste Water