Abstract:To investigate the influences of nitrogen (N) and phosphorus (P) in water on the biogas production digested by water hyacinth, plants from Baishan Bay and Caohai Lake in Dianchi Lake, Wujin Region in Taihu Lake, and Pond Two in Jiangsu Academy of Agricultural Sciences were collected to conduct a mesophilic batch anaerobic digestion experiment. Results showed that the methane productivity from water hyacinth had significant correlation to the concentrations of N and P in waters. The highest biogas production was from water hyacinth in Caohai Lake, with production of 390mL/gTS (499mL/gVS); while the lowest was from the ones in Baishan Bay, with production of 289mL/gTS(334mL/gVS). Cellulose, hemicellulose and crude protein were the major contributors to the biogas production. Their degradation rates were the lowest in water hyacinth from Baishan Bay. Acetate and propionate were the main volatile fatty acids (VFA) during the anaerobic digestion of water hyacinth. Digestion of water hyacinth from Caohai Lake produced the highest VFA (2466mg/L), while VFA produced by the water hyacinth from Baishan Bay was only 915mg/L. It suggested that the concentrations of N and P in waters would contribute to the differences of structure (such as the ratio of root to shoot) and chemical composition of water hyacinth, and consequently influence its biodegradability and biogas productivity during the anaerobic digestion.
钱玉婷, 叶小梅, 常志州, 杜静, 潘君才. 不同水域凤眼莲厌氧发酵产甲烷研究[J]. 中国环境科学, 2011, 31(9): 1509-1515.
QIAN Yu-Ting, YE Xiao-Mei, CHANG Zhi-Zhou, DU Jing, PAN Jun-Cai. Methane production characteristics of water hyacinth from different water areas. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(9): 1509-1515.