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首页> 外文期刊>RSC Advances >Co-digestion of microalgae with potato processing waste and glycerol: effect of glycerol addition on methane production and the microbial community
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Co-digestion of microalgae with potato processing waste and glycerol: effect of glycerol addition on methane production and the microbial community

机译：用马铃薯处理废物和甘油的微藻和甘油的共消化：甘油加入对甲烷生产和微生物群落的影响

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The production of methane-rich biogas from the anaerobic digestion (AD) of microalgae is limited by an unfavorable biomass carbon-to-nitrogen (C/N) ratio; however, this may be ameliorated using a co-digestion strategy with carbon-rich feedstocks. For reliable plant operation, and to improve the economics of the process, secure co-feedstock supply (ideally as a waste-stream) is important. To this end, this study investigated the feasibility of co-digesting microalgae ( Chlorella vulgaris ) with potato processing waste (potato discarded parts, PPW _(dp) ; potato peel, PPW _(p) ) and glycerol, while monitoring the response of the methanogenic community. In this semi-continuous study, glycerol (1 and 2% v/v) added to mixtures of C. vulgaris ?:?PPW _(dp) enhanced the specific methane yields the most, by 53–128%, whilst co-digestion with mixtures of C. vulgaris ?:?PPW _(p) enhanced the methane yields by 62–74%. The microbial communities diverged markedly over operational time, and to a lesser extent in response to glycerol addition. The acetoclast Methanosaeta was abundant in all treatments but was replaced by Methanosarcina in the potato peel with glycerol treatment due to volatile fatty acid (VFA) accumulation. Our findings demonstrate that the performance of microalgae co-digestion is substantially improved by the addition of glycerol as an additional co-feedstock. This should improve the economic case for anaerobically digesting microalgae as part of wastewater treatment processes and/or the terminal step of a microalgae biorefinery.
机译：微藻厌氧消化（Ad）的富含甲烷的沼气的生产受到不利生物质碳 - 氮（C / N）比的限制;然而，这可能使用具有富含碳原料的共消化策略来改善。对于可靠的工厂操作，并改善该过程的经济学，安全的共用电源（理想情况下作为废物流）很重要。为此，本研究调查了与马铃薯加工废物（马铃薯废弃物部分，PPW _（DP）;马铃薯皮，PPW _（P））和甘油，同时监测响应的响应甲状腺癌。在该半连续研究中，加入甘油（1和2％v / v）加入C.Vulgaris的混合物中？：PPW _（DP）增强了特定的甲烷产量最多，共同消化了53-128％用C.寻常型的混合物？：PPW _（P）增强甲烷产率62-74％。微生物群体明显过度发散，并响应于甘油添加的较小程度。乙酰菌类甲烷酸甲烷酸甲烷醚在所有治疗中丰富，但由于挥发性脂肪酸（VFA）积累，甘油果皮中的甲蛋白酶脱落。我们的研究结果表明，通过加入甘油作为另外的共用甘油基本上改善了微藻共消化的性能。这应该改善厌氧消化微藻的经济案例，作为废水处理过程的一部分和/或微藻生物颗粒的末端步骤。

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