Influence of inoculum to substrate ratios (ISRs) on the performance of anaerobic digestion of algal residues
Influence of inoculum to substrate ratios (ISRs) on the performance of anaerobic digestion of algal residues
复制标题
接种物与底物比率（ISR）对藻类残留物厌氧消化性能的影响
作者：
Yan Li;Dongliang Hua;Jie Zhang;Mintian Gao;Yuxiao Zhao;Haipeng Xu;Xiaohui Liang;Fuqiang Jin;Xiao
随着人们对微藻生物柴油的日益关注，提取脂肪后的藻类残留物在能源生产中引起了极大的关注。在中温条件下进行了15d的间歇发酵试验，考察了接种物与底物比(ISRs)对小球藻厌氧消化产甲烷的影响。残留物。通过每日测定pH值、挥发性脂肪酸(VFAS)、总氨氮(TAN)、甲烷体积来监测藻渣转化为甲烷反应的稳定性和进展情况。结果表明，在1：2、1：1、2：1和3：1的间歇比下，甲烷产率分别为26.6mlCH4/g挥发性固体(VS)、191.6、195.6和210.6 mLCH4/g挥发性固体(VS)。当ISR值低于1：1时，甲烷产量显著下降，这是由于氨氮对甲烷生成的抑制作用较差。重要的是，ISRS的测定可以为如何以藻类残渣为原料的间歇消化池的初始化提供有用的信息。
With increasing concerns of microalgal-biodiesel, algal residues after lipid extraction are raising great attention for energy production. A batch test of 15 days under mesophilic condition was conducted to evaluate the effects of inoculum to substrate ratios (ISRs) on the methane production by anaerobic digestion of Chlorella sp. residue. The stability and progress of the reaction from algal residue to methane were monitored by measuring the pH, volatile fatty acids (VFAs), total ammoniacal nitrogen (TAN), methane volume on a daily basis. The results indicated that the values obtained were 26.6, 191.6, 195.6 and 210.6 ml CH4/g volatile solid (VS) for ISRs of 1:2, 1:1, 2:1 and 3:1. The methane production was significantly decreased as the ISR was lower than 1:1, which was resulting from the poor methanogenesis inhibited by NH4+-N. It would be of great importance that determination of ISRs might provide useful information on how to initialize a batch digester with algal residue as material.