陶粒对巨藻厌氧发酵甲烷和硫化氢产量的影响（英文）

Effects of ceramsite on methane and hydrogen sulphide productions from macroalgae biomass

巨藻厌氧发酵过程存在易酸化、硫化氢产量高的问题,大大限制了其在生物制甲烷方面的应用。为了研究陶粒对巨藻厌氧发酵的甲烷和硫化氢生产的影响,开展了以巨藻Macrocystis pyrifera生物质为底物的批次发酵试验。实验分4组,C0、C1、C2和C3,分别添加了0、1.5、3.0、4.5 g/g_(substrate)的陶粒。其中,C2组得到了最高的甲烷累积产量,为286.3 m L/g_(substrate),比C0组提高了40.11%。C1、C2、C3组的硫化氢累积产量分别比C0降低了32.67%、44.66%、53.21%。结果显示,添加陶粒的巨藻发酵体系甲烷产量提高、延滞期缩短、硫化氢产量降低。

The easy acidification and high hydrogen sulfide （H2S） production during anaerobic digestion of macroalgae limited its application in biomethane production. In order to investigate the effects of ceramsite on methane and HzS productions during anaerobic digestion of macroalgae, batch experiments ofMacrocystis pyrifera were carried out. Four groups named C0, C1, C2 and C3 added with 0, 1.5, 3.0 and 4.5 g/g substrate of ceramsite, respectively, were studied and compared. The highest cumulative methane yield of 286.3 mL/g substrate is obtained in C2, which is 40.11% higher than that of CO. The cumulative HzS yields of C1, C2 and C3 are 32.67%, 44.66% and 53.21% lower than that of CO, respectively. Results indicate that ceramsite addition permits higher methane yields, shorter lag-phase time and lower HzS yields during anaerobic digestion of Macrocystispyrifera.