低强度水热法预处理玉米秸秆提高其厌氧消化产甲烷性能
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摘要
为了提高玉米秸秆厌氧消化产甲烷性能,试验采用低强度水热法处理玉米秸秆,研究了预处理后玉米秸秆的性质变化以及产气性能。结果表明,低强度水热法能够有效提高玉米秸秆产气性能。在80℃,60%含水率和预处理24 h条件下,玉米秸秆产气量达到299.5 mL·g~(-1)VS,比对照组233.8 mL·g~(-1)VS提高了28.1%。在水热过程中添加秸秆干重的2%的NaOH后,50℃,60%含水率和预处理12 h条件下,玉米秸秆产气量达到444.1 mL·g~(-1)VS,比对照组提高了89.9%。因此,在水热预处理过程中添加NaOH能够有效提高玉米秸秆产气性能。
In order to improve the performance of anaerobic digestion and methane production of corn straw, low intensity hydrothermal method was adopted to treat corn straw. The results showed that the low intensity hydrothermal pretreatment method effectively improved the biogas production of corn straw. The pretreatment at moisture of 60%, temperature of 80℃ for 24 h, the biogas production rate of corn straw was 299.5 mL·g~(-1)VS, increased by 28.1% comparing with the 233.8 mL·g~(-1)VS of the control group. Moreover, adding of 2% of NaOH based on the dry weight of corn straw during the hydrothermal process at a moisture content of 60%, temperature of 50℃for 12 h, the biogas production rate reached 444.1 mL·g~(-1)VS, which was 89.9% higher than that of control group. Therefore, the addition of NaOH during hydrothermal pretreatment was effective to improve the biodegradability of the corn straw and enhance the biogas production.
In order to improve the performance of anaerobic digestion and methane production of corn straw, low intensity hydrothermal method was adopted to treat corn straw. The results showed that the low intensity hydrothermal pretreatment method effectively improved the biogas production of corn straw. The pretreatment at moisture of 60%, temperature of 80℃ for 24 h, the biogas production rate of corn straw was 299.5 mL·g~(-1)VS, increased by 28.1% comparing with the 233.8 mL·g~(-1)VS of the control group. Moreover, adding of 2% of NaOH based on the dry weight of corn straw during the hydrothermal process at a moisture content of 60%, temperature of 50℃for 12 h, the biogas production rate reached 444.1 mL·g~(-1)VS, which was 89.9% higher than that of control group. Therefore, the addition of NaOH during hydrothermal pretreatment was effective to improve the biodegradability of the corn straw and enhance the biogas production.
引文
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[13] Toor S S, Rosendahl L, Hoffmann J, et al. Lignocellulosic Biomass—Thermal Pre-treatment with Steam[M]// Pretreatment Techniques for Biofuels and Biorefineries. Springer Berlin Heidelberg, 2013:59-75.
[14] 梁仲燕, 戴本林, 郭旭晶,等. H3PO4预处理水稻秸秆厌氧发酵产沼气的试验研究[J]. 中国沼气, 2016, 34(3):31-35.
[15] 李琳, 张继宇, 何艳峰,等. 热碱预处理对玉米秸秆厌氧消化的影响[J]. 北京化工大学学报:自然科学版, 2016, 43(5):1-7.
[16] Gan S, Zakaria S, Chia C H, et al. Effect of hydrothermal pretreatment on solubility and formation of kenaf cellulose membrane and hydrogel[J]. Carbohydrate Polymers, 2015, 115(115):62-68.
[2] 钱玉婷,杜静, 陈广银,等.温和水热预处理促进秸秆产沼气的条件优化研究[J].中国环境科学,2016,36(12):3703-3710.
[3] Hendriks A T, Zeeman G. Pretreatments to enhance the digestibility of lignocellulosic biomass.[J]. Bioresource Technology, 2009, 99(1):10-18.
[4] 高白茹, 常志州, 叶小梅,等. 堆肥预处理对稻秸厌氧发酵产气量的影响[J]. 农业工程学报, 2010, 26(5):251-256.
[5] 孙辰, 刘荣厚, 覃国栋. 芦笋秸秆预处理与厌氧发酵制取沼气试验[J]. 农业机械学报, 2010, 41(8):94-99.
[6] 李世密, 魏雅洁, 张晓健,等. 秸秆类木质纤维素原料厌氧发酵产沼气研究[J]. 可再生能源, 2008, 26(1):50-54.
[7] Alvira P, Tomas-Pejo E, Ballesteros M. Pretreatment technologies for an efficient bioethanol production process based on enzymatic hydrolysis: A review[J]. Bioresource Technology 2010,101(13):4851-4861.
[8] Rabermanolontsoa H, Saka S. Various pretreatments of lignocellulosics[J]. Bioresource Technology, 2016,199:83-91.
[9] Zhang X, Wang W, Yu Q. Liquid hot water pretreatment of lignocellulosic biomass for bioethanol production accompanying with high valuable products[J]. Bioresource Technology, 2016,199:68-75.
[10] 肖领平.木质生物质水热资源化利用过程机理研究[D].北京:北京林业大学, 2014.
[11] Leza H A R. Process development for bioethanol production using wheat straw biomass[D]. Portugal: Universidade do Minho, 2011.
[12] 樊世漾. 水热预处理及酸/碱—水热预处理对玉米秸秆酶解产糖及厌氧发酵的影响[D]. 北京:北京林业大学,2016.
[13] Toor S S, Rosendahl L, Hoffmann J, et al. Lignocellulosic Biomass—Thermal Pre-treatment with Steam[M]// Pretreatment Techniques for Biofuels and Biorefineries. Springer Berlin Heidelberg, 2013:59-75.
[14] 梁仲燕, 戴本林, 郭旭晶,等. H3PO4预处理水稻秸秆厌氧发酵产沼气的试验研究[J]. 中国沼气, 2016, 34(3):31-35.
[15] 李琳, 张继宇, 何艳峰,等. 热碱预处理对玉米秸秆厌氧消化的影响[J]. 北京化工大学学报:自然科学版, 2016, 43(5):1-7.
[16] Gan S, Zakaria S, Chia C H, et al. Effect of hydrothermal pretreatment on solubility and formation of kenaf cellulose membrane and hydrogel[J]. Carbohydrate Polymers, 2015, 115(115):62-68.