摘要
为了研究废弃食用油脂中温厌氧发酵特性,对废弃食用油脂进行了中温35℃±1℃批式发酵,主要考察了不同原料与接种物比(F/I)和碳氮比(C/N)条件下,甲烷产量和FVA的变化情况,并运用修正的Gompertz模型对其产气模型进行动力学拟合。实验结果表明,在中温条件下,F/I比值为1∶6,1∶3,1∶2和2∶3时,废弃油脂都能较好地进行厌氧发酵产甲烷,最大产甲烷产量分别为737,418,342和300 m L·g^(-1)TS。采用修正Gompertz模型分别对1∶6,1∶3,1∶2和2∶3实验组产甲烷曲线进行拟合,得到产甲烷潜力分别为823.68,461.12,379.43和339.20m L·g^(-1)TS,最大产甲烷速率分别为56.25,31.03,24.79和20.63 m L·d^(-1)g^(-1)TS。C/N值为28∶1,14∶1,7∶1和4∶1时,随着C/N减小最大产甲烷产量不断增大,分别为185,308,395和460 m L·g-1TS。
In order to study characteristics of mesotherm anaerobic digestion of waste edible oil, batch experiments with waste edible oil as feedstock under 35 ℃ ± 1 ℃ were carried out to evaluate its methane production potential and VFA vari- ations. And the data were fitted with the modified Gompertz model to assess the characteristics of its anaerobic digestion. Results indicated that the waste edible oil obtained a good anaerobic digestion performance, at the feedstock to inoeulums ratio （F/I） of 1 ： 6, 1 ： 3, 1 ： 2 and 2： 3, it obtained a maximum methane yield of 737, 418, 342,300 mL · g^- 1TS, respec- tively. And with these maximum methane yield, the model fitting results showed that the methane production potential were 823.68,461.12, 379.43, 339.20 mL · g^-1TS, the maximum methane production rate were 56.25, 31.03, 24.79, and 20.63 mL · d^-1g^-1TS, respectively. And under the C/N ratio of 28： 1, 14： 1, 7：1 and 4： 1, the methane production po- tential were 185, 308, 395, and 460 mL · g^-1TS respeclirely, increasing with the decreasing of C/N ratio.
出处
《中国沼气》
北大核心
2016年第5期27-31,共5页
China Biogas
基金
四川省应用基础研究项目(2015JY0054)
四川省食用菌创新团队资助项目
关键词
废弃食用油脂
厌氧发酵
Gompertz模型
waste edible oil
anaerobic digestion
methane production potential
Gompertz model
