0.05)。利用修正的Gompertz模型進行產(chǎn)氣動力學分析后,,發(fā)現(xiàn)TS質(zhì)量分數(shù)越高、接種比越大,、溫度越高,,產(chǎn)甲烷遲滯期越短。同時對不同溫度反應體系中的微生物群落進行了分析,,發(fā)現(xiàn)Bacteroidetes和 Firmicutes為優(yōu)勢菌門,,隨著溫度的升高,產(chǎn)甲烷菌逐漸由氫營養(yǎng)型代替乙酸營養(yǎng)型,。因此,, TS濃度、接種比和溫度是厭氧發(fā)酵重要因素,,初步確定2%TS,、接種比為1的中溫酒糟厭氧發(fā)酵產(chǎn)甲烷性能相對較好。"/>

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酒糟厭氧消化產(chǎn)甲烷特性與微生物菌群結構分析
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山東省自然科學基金項目(ZR2020QE240)、金華市科技計劃項目(2022-3-066)和煙臺市校地融合項目(2019XDRHXMQT36)


Performance of Methane Production and Microbial Structure Distribution for Vinasse Anaerobic Digestion
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    摘要:

    酒糟是釀酒生產(chǎn)過程中的副產(chǎn)物,,以酒糟為研究對象,,分別考察不同底物總固體(Total solid, TS)質(zhì)量分數(shù)(0.5%、1%,、1.5%,、2%)、接種比(接種污泥與酒糟的揮發(fā)性固體質(zhì)量比)(0.25,、0.5,、0.75、1,、1.5)和溫度(25,、37、50℃)條件下酒糟的厭氧消化產(chǎn)甲烷特性,。結果表明,,隨著TS濃度的增加,產(chǎn)甲烷量逐漸增加,, 2%TS條件下可獲得最大的累計產(chǎn)沼氣量(532.8mL/g)和產(chǎn)甲烷量(294.7mL/g),。接種比是影響厭氧消化系統(tǒng)的重要因素,隨著接種比的增大,,系統(tǒng)累計產(chǎn)沼氣和產(chǎn)甲烷量呈先增加后減少的趨勢,,在接種比為0.25和0.5的條件下,系統(tǒng)發(fā)生崩潰,,并未產(chǎn)甲烷,,當接種比為1時,獲得最大的累計產(chǎn)沼氣和甲烷量,。當TS質(zhì)量分數(shù)為2%,、接種比為1.5、發(fā)酵溫度為50℃的條件下,,獲得最大的累計產(chǎn)沼氣量為559.4mL/g,,相較37℃條件下提高了10.2%,而獲得的累計產(chǎn)甲烷量為284.0mL/g,,相較37℃并未顯著提升(P>0.05),。利用修正的Gompertz模型進行產(chǎn)氣動力學分析后,,發(fā)現(xiàn)TS質(zhì)量分數(shù)越高、接種比越大,、溫度越高,,產(chǎn)甲烷遲滯期越短。同時對不同溫度反應體系中的微生物群落進行了分析,,發(fā)現(xiàn)Bacteroidetes和 Firmicutes為優(yōu)勢菌門,,隨著溫度的升高,產(chǎn)甲烷菌逐漸由氫營養(yǎng)型代替乙酸營養(yǎng)型,。因此,, TS濃度、接種比和溫度是厭氧發(fā)酵重要因素,,初步確定2%TS,、接種比為1的中溫酒糟厭氧發(fā)酵產(chǎn)甲烷性能相對較好。

    Abstract:

    Vinasse is a by-product in the process of wine production. Vinasse were used as the research object. The effects of different substrate total solids (TS) concentrations (0.5%, 1%, 1.5%, and 2%), inoculation and vinasse ratios (0.25, 0.5, 0.75, 1, and 1.5), and temperatures (25℃, 37℃, and 50℃) on performance of methane production for vinasse AD were investigated. The results showed that methane production was increased gradually with the increase of TS concentration, and the maximum cumulative biogas production (532.8mL/g) and methane production (294.7mL/g) were obtained at 2% TS. The inoculation ratio was an important factor affecting the anaerobic digestion system, with the increase of inoculation ratio, the cumulative biogas and methane production of the system showed an increasing and then decreasing trend, the system collapsed and did not produce methane at inoculation ratios of 0.25 and 0.5, and the maximum cumulative biogas and methane production were obtained when the inoculation ratio was 1. When TS was 2%, and inoculation ratio was 1.5, the cumulative biogas production obtained at a fermentation temperature of 50℃ was 559.4mL/g, which was 10.2% higher than that at 37℃, and the cumulative methane production obtained was 284.0mL/g, which was not significantly higher than that at 37℃ (P>0.05). After gas production kinetic analysis by using the modified Gompertz model, it was found that the higher the TS was, the higher the inoculum ratio and the temperature were, and the shorter the methane production latency period was. The microbial communities in the AD system at different temperatures were also analyzed, and it was found that Bacteroidetes and Firmicutes were the dominant phyla, and the methanogenic bacteria were gradually replaced by hydrogenotrophic instead of acetoclastic methanogens with the increase of temperature. Therefore, TS concentration, inoculation ratio and temperature were important factors for AD, and it was initially determined that the methanogenic performance of vinasse mesophilic AD with 2%TS and an inoculation ratio of 1 was relatively good, and the research result can provide data support for the application of vinasse AD technology.

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柳珊,郭春春,何榮玉,王淳,馬艷芳,董仁杰.酒糟厭氧消化產(chǎn)甲烷特性與微生物菌群結構分析[J].農(nóng)業(yè)機械學報,2023,54(s1):338-349,,380. LIU Shan, GUO Chunchun, HE Rongyu, WANG Chun, MA Yanfang, DONG Renjie. Performance of Methane Production and Microbial Structure Distribution for Vinasse Anaerobic Digestion[J]. Transactions of the Chinese Society for Agricultural Machinery,2023,54(s1):338-349,,380.

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  • 收稿日期:2023-05-20
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