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Microbial community dynamics during anaerobic co-digestion of corn stover and swine manure at different solid content, carbon to nitrogen ratio and effluent volumetric percentages.
Journal of Environmental Science and Health, Part A ( IF 2.1 ) Pub Date : 2020-05-27 , DOI: 10.1080/10934529.2020.1771975
Gail Joseph 1 , Bo Zhang 2 , Scott H Harrison 3 , Joseph L Graves 4 , Misty D Thomas 3 , Renuka Panchagavi 5 , Jude Akamu J Ewunkem 6 , Lijun Wang 2
Affiliation  

The methane production and the microbial community dynamics of thermophilic anaerobic co-digestion (AD) of corn stover, swine manure and effluent were conducted at total solid (TS) content of 5%, 10% and 15%, the carbon to nitrogen ratio (C/N) of 20, 30 and 40 and the effluent volumetric percentage (EVP) of 20%, 40% and 60%. For batches with 5% TS, the highest methane yield of 238.5–283.1 mL g−1 volatile solid (VS) and the specific methane productivity of 138.5–152.2 mL g−1 initial VS were obtained at the C/N ratios of 20 and 30. For the mixtures with 10% and 15% TS, the highest methane yield was 341.9 mL g−1 VS and 351.2 mL g−1 VS, respectively, when the C/N ratio of 20% and 60% EVP conditions were maintained. Co-digestion of swine manure with corn stover caused an obvious shift in microbial population, in which the archaeal population changed from 0.3% to 2.8% and the bacterial community changed from 97.2% to 99.7%. The experimental batches with the highest relative abundance of the archaeal population (2.00% of total microbial population for 5% TS, 1.74% for 10% TS and 2.76% for 15% TS) had the highest rate of methanogenesis subsequently enhancing methane production (283.08 mL g−1 VS for 5% TS, 341.91 mL g−1 VS for 10% TS and 351.23 mL g−1 VS for 15% TS). The results of microbiome analysis enabled understanding the key populations in biomethane generation.



中文翻译:

玉米秸秆和猪粪厌氧共消化过程中不同固含量,碳氮比和出水体积百分比时的微生物群落动态。

在总固形物(TS)含量为5%,10%和15%,碳氮比为(TS)的条件下,进行了玉米秸秆,猪粪和废水中甲烷厌氧消化过程(AD)的甲烷生产和微生物群落动态。 C / N)为20、30和40,流出物体积百分比(EVP)为20%,40%和60%。对于含5%TS的批次,在C / N比为20和20时,最高甲烷产量为238.5–283.1 mL g -1挥发性固体(VS),甲烷比生产率为138.5–152.2 mL g -1初始VS。30.对于具有10%和15%TS的混合物,最高甲烷产量为341.9 mL g -1 VS和351.2 mL g -1当维持C / N比为20%和60%EVP的条件下分别为VS。猪粪与玉米秸秆的共同消化导致微生物种群发生明显变化,其中古细菌种群从0.3%变为2.8%,细菌群落从97.2%变为99.7%。在古细菌种群中相对丰度最高的实验批次(5%TS占总微生物种群的2.00%,10%TS占1.74%,15%TS的占2.76%)具有最高的产甲烷率,从而提高了甲烷产量(283.08)毫升克-1 VS为5%TS,341.91毫升克-1 VS 10个%TS和351.23毫升克-1 VS为15%TS)。微生物组分析的结果有助于了解生物甲烷生成中的关键种群。

更新日期:2020-05-27
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