Nymphoides peltatum as a novel feedstock for biomethane production via anaerobic co-digestion with waste sludge |
| |
Authors: | Hong Xiao Dexin Fang Yingjun Wang Yinlong Xiao Lin Luo Zhang Cheng Xiaohong Zhang Hong Peng |
| |
Affiliation: | College of Environmental Sciences, Sichuan Agricultural University-Chengdu Campus, Chengdu, Sichuan, 611130, China |
| |
Abstract: | Nymphoides peltatum (NP) is exploited as a novel feedstock for biomethane production via anaerobic co-digestion with waste sludge (WS). Batch experiments are conducted under mesophilic condition at NP/WS of 1/3, 2/2, 3/1, 0/4 and 4/0 based on volatile solids (VS). Prior to anaerobic digestion (AD), NP undergoes only natural drying and grinding. The maximum net cumulative methane yield (265.16 mL CH4·g VSadded?1) and the highest gross VS removal rate (56.12%) are obtained at NP/WS of 1/3. The kinetic analysis by the modified Gompertz model fit hinted that 28 days is adequate for methane recovery and co-digestion significantly accelerates the digestion rate. Synergetic effect is corroborated to exist in co-digestion due to amiable conditions in term of total ammonia nitrogen, free ammonia, pH, volatile fatty acids and total alkalinity. High-throughput 16S rRNA pyrosequencing reveals that Bacteroidetes, Firmicutes, Methanosarcina and Methanosaeta are conducive to AD of NP. |
| |
Keywords: | Nymphoides peltatum Wasted sludge Co-digestion Methane production Microbial community |
本文献已被 ScienceDirect 等数据库收录! |
|