大型海藻厌氧发酵特性研究

Characteristics of Anaerobic Digestion of Marine Macro-algae

文章采用中温批式厌氧发酵工艺,研究清洗及未清洗海带在不同接种率下,盐度对厌氧发酵特性的影响。研究结果表明:相同底物浓度发酵时,未清洗海带的产气性能要优于清洗海带,无机盐对产气率提高约13%~25%。未清洗海带组在盐度为12.96 g·L^(-1)时的产气性能最佳,产气率和产甲烷率分别为464.4±0.39和288.28±0.24 m L CH_4·g^(-1) VS_(added),比相同条件下清洗海带的产甲烷率提高29.56%,此时发酵液中主要金属离子浓度K^+4780 mg·L^(-1),Mg^(2+)250 mg·L^(-1),Ca^(2+)130 mg·L^(-1)和Na^+1600 mg·L^(-1),表明适宜浓度的无机盐有利于厌氧发酵的产气性能。

The effects of salinity on anaerobic digestion performance of Laminaria Japonica were investigated under the different inoculation rate adopting batch mesophilic experiments. The results indicated that the biogas production performance of the non-washed Laminaria Japonica were better than that of the washed groups,which the biogas yield was increased by13% ~ 25%. And the best biogas production of 464. 4 ± 0. 39 m L·g^-1VSaddedand best methane production of 288. 28 ±0. 24 m L CH_4·g^-1 VS_（added） were obtained for the non-washed Laminaria Japonica under condition of salinity concentration of 12. 96 g·L^-1,and K~＋,Mg^2 ＋,Ca^2 ＋,Na＋concentration of 4780 mg·L^-1,250 mg·L^-1,130 mg·L^-1 and 1600 mg·L^-1 respectively. It showed that the suitable concentration of inorganic salt was beneficial to the gas production performance.