Enhancement of the energy yield from microalgae via enzymatic pretreatment and anaerobic co-digestion
Enhancement of the energy yield from microalgae via enzymatic pretreatment and anaerobic co-digestion
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DOI：
10.1016/j.energy.2018.08.124
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发表时间：
2018-12
期刊：
影响因子：
9
通讯作者：
Yi Zhang;Xihui Kang;Zhongming Wang;Xiaoying Kong;Lianhua Li;Yongming Sun;Shunni Zhu;Siran Feng;Xinjian Luo;Pengmei Lv
中科院分区：
文献类型：
--
作者：
Yi Zhang;Xihui Kang;Zhongming Wang;Xiaoying Kong;Lianhua Li;Yongming Sun;Shunni Zhu;Siran Feng;Xinjian Luo;Pengmei Lv
微藻被认为是生产生物柴油最有前景的生物质资源之一，而提取脂肪后的藻类残留物(AR)需要被利用来提高其经济性和可持续性。本研究提出了一种微藻Chlorellasp的综合生化方法。加工以实现高能量产量(12.33KJ g−1VS)。首先用混合酶对微藻进行脱脂处理。然后，将从微藻脂肪中提取的AR与能量草(GR)狼尾草共消化，以生产甲烷。结果表明，纤维素酶、木聚糖酶和果胶酶混合酶预处理微藻的产脂率比未经酶预处理的提高了54.45%。当AR和GR的比例为1：3时，AR和GR共消化的最大甲烷产率(207.35 ± 15.66mLCH4g−1VS)最大。基于生物柴油和甲烷产率的能量产率评估表明，这种两步组合方法的能量产率比单独使用生物柴油的能量产率高169%。因此，所提出的集成方法被证明是适用于能源生产的微藻加工。
Microalgae have been considered as one of the most promising biomass resources for the generation of biodiesel, whereas algal residues (AR) after lipid extraction need to be utilized to enhance its economy and sustainability. This study proposed an integrated biochemical method for microalgaeChlorellasp. processing to achieve a high energy yield (12.33 KJ g−1VS). The microalgae were first pretreated with mixed enzymes for lipid extraction. After that, the AR obtained from the lipid extraction of microalgae was co-digested with energy grass (GR)Pennisetumhybrid for methane production. Results indicated that the lipid yield from microalgae was enhanced by 54.45% with mixed enzymes pretreatment of cellulase, xynalase and pectinase compared to that without enzymatic pretreatment. The maximal methane yield (207.35 ± 15.66 mLCH4g−1VS) of AR and GR co-digestion was obtained with the AR and GR VS ratio at 1:3. Energy yields evaluation based on the biodiesel and methane yields indicated that the energy yield for this two-step combined method was 169% higher than that for biodiesel alone. Thus, the proposed integrated approach was verified to be applicable for microalgae processing for energy production.