共查询到19条相似文献,搜索用时 140 毫秒
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《可再生能源》2014,(10)
以荷叶为原料对其发酵产沼气进行了研究。以稻草秸秆为对照,活性污泥为接种物,对荷叶厌氧发酵产沼气的能力进行了评估,并研究了荷叶对稻草秸秆发酵产沼气的影响。荷叶在37℃条件下发酵35 d,沼气产气量为167.0 mL/g,沼气中甲烷含量为65.72%,分别高出稻草秸秆15.57%,12.25%。荷叶与稻草秸秆按1∶1进行混合发酵时沼气产气率为184.5 mL/g,沼气中甲烷含量为70.68%,分别高出稻草秸秆27.68%,20.72%。荷叶发酵前后TS,VS含量变化分别为3.77%,15.17%,发酵前后pH维持在7左右。结果表明,荷叶在沼气生产上有很大潜力。 相似文献
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为阐明木质纤维素原料乙醇发酵残留物产甲烷的能力,以汽爆玉米秸秆为原料进行高底物浓度同步糖化发酵(SSF)产乙醇,并将乙醇发酵残留物、发酵残留物上清及固体部分分别进行产甲烷潜力实验。研究结果表明,汽爆玉米秸秆同步糖化发酵底物浓度达到30%(w/w),乙醇浓度为48.9g/L。发酵残留物产甲烷潜力为46mL CH_4/g底物,上清部分产甲烷潜力为12mL CH_4/g底物,固体部分产甲烷潜力达到286mL CH_4/g底物,从而证明高底物浓度汽爆玉米秸秆乙醇发酵残留物具有较好的产甲烷潜力。 相似文献
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以总固体1∶1的玉米秸秆和猪粪为混合原料,采用10 L厌氧反应器进行批式全混中温沼气发酵,并利用454焦磷酸测序法测定混合发酵过程中细菌群落变化。结果表明:预处理玉米秸秆和猪粪混合沼气发酵启动迅速,在第4天达到产气高峰,容积产气率为1.17 L/(L·d),46 d原料沼气产率为356.55 m L/g VS。该混合发酵系统中共有23~27门细菌,其中优势菌群为拟杆菌门(Bacteroidetes)、厚壁菌门(Firmicutes)和变形菌门(Proteobacteria)。发酵期内的Shannon指数在4.88~5.53之间,说明发酵期内细菌多样性比较稳定。 相似文献
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3MW集中式热电肥联产沼气工程设计与建设 总被引:3,自引:0,他引:3
山东民和牧业股份有限公司利用所属23家养殖场的鸡粪和污水作为沼气发酵原料,投资建设大型畜禽养殖场集中式沼气发电工程.原料经水解除砂工艺将鸡粪中的砂砾除去,保证发酵效率;采用中温(38 ℃)发酵工艺,产沼气30 000 m3/d;采用高效率低运行成本的生物脱硫工艺,将沼气中的H2S含量降至200×10-6以下;经净化的沼气在双膜干式贮气柜中贮存,供给热电联产的发电机组使用.发电量60 000 kWh/d,机组余热用于冬季发酵系统自身增温;发酵后的沼液用作周围葡萄、苹果及玉米地的有机肥料.项目实现了温室气体减排84882tCO2当量.文章介绍了该沼气发电工程的工艺特点和技术要点,为同类型沼气发电工程设计和建设提供参考. 相似文献
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The dry anaerobic fermentation plays an important role in the field of bioengineering, especially in the production of energy (biogas) and organic fertilizer. Meanwhile the pollution effect of the solid wastes are decreased. Dry anaerobic fermentations of different organic solid wastes were studied. These included cotton stalks, treated cotton stalks, corn stalks, rice straw, and water hyacinth. The effect of the initial solid concentration, temperature, starter, and buffer additives on dry anaerobic fermentation on biogas production rate and yield has been studied. 相似文献
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沼液对甜玉米幼苗素质、产量和品质影响的试验研究 总被引:7,自引:1,他引:6
试验研究了沼液浸种、沼液喷施和沼液追肥对甜玉米幼苗素质、产量及品质的影响。结果表明.沼液浸种能增强甜玉米的幼苗素质,根鲜重和干重分别比干播增加13.92%和15.71%,全株鲜重和干重分别比干播增加14.81%和6.37%。处理2(沼液浸种)和处理3(沼液喷施)分别比处理1(对照)增产5.37%,11.75%。沼液处理改善了甜玉米的内在品质,处理4(沼液浸种+沼液追肥+沼液喷施)的糖/酸和固/酸最大,分别比处理1(对照)增加74.0%,52.7%。沼液处理的籽粒中的钙和铁含量降低,磷、镁和锰含量升高;沼液浸种可促进籽粒对大多数元素的吸收。 相似文献
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Omar Alghoul Zaki El-Hassan Abdul Ghani Olabi 《Energy Sources, Part A: Recovery, Utilization, and Environmental Effects》2019,41(17):2051-2060
The production of biogas has been a substantial target to be utilized globally, especially in the agricultural sector. Most organic waste that is being produced from other forms of renewable energy systems is mainly used to reduce greenhouse emission (GHG), which as well reduces the daily consumption of fossil fuels. Anaerobic Digestion (AD) has been studied widely in recent years where its implementation in the industry has seen a mitigating impact on greenhouse gases. Unrestricted discharge of the big amount of waste food (WF) has become the main effect of severe environmental pollution worldwide. Among the various treatment methods, anaerobic digestion (AD) of waste food allows its valorization and the biogas produced can be used as biofuel enhancing the gas supply. In this study, a mechanical pre-treatment with Hollander beater has been applied to break down the particle size of waste food in the way to increase feedstock specific surface areas in other to enhance biogas production. Following, the pre-treatment of waste food during 30 min beating time, the biogas yield achieved a value of about 610.33 ml/gTS. Accordingly, a response surface methodology (RSM) can be used to critically evaluate the effects of process parameter (beating time and temperature) to the output response (biogas production). Pre-treated waste food by Hollander beater at beating time of 30 min enhances biogas production by 80%. An optimum biogas yield was achieved with pre-treatment of waste food at a beating time of 30 min. 相似文献
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以华南地区生长的多年生草本植物象草、芒草和五节芒为原料,采用序批式中温(35 ± 1℃)厌氧发酵工艺,研究这三种能源草制备生物燃气的性能。结果表明:象草、芒草和五节芒的最高日产气率分别为31.33、24.84和19.51 Nml•(gVSadded)−1•d−1,原料产气率分别为355.78、285.58和235.38 Nml•(gVSadded)−1,产甲烷率分别为166.43、109.89和97.20 Nml•(gVSadded)−1,占理论产甲烷率的33.83%、21.67%和19.48%,象草的厌氧发酵性能优于芒草和五节芒的主要原因是象草中纤维素、半纤维素等易降解的有机物含量较高。修正的Gompertz方程拟合效果较好,象草、芒草和五节芒的累积产气量分别为344.81、290.11和279.01 Nml•(gVSadded)−1,延滞期分别为5.96、0.71和0 d。 相似文献
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《International Journal of Hydrogen Energy》2019,44(56):29575-29582
Co-digestion in anaerobic fermentation has been widely used to improve biogas production. The biogas production from co-digestion of glucose and glycerol was studied in laboratory-scale batch reactors under mesophilic temperatures, pH 7. The batch experiments involved a variation of glycerol/glucose ratios with initial chemical oxygen demand (COD) for all conditions was fixed at 5,200 mg L−1. The highest yield of biogas production was obtained from glycerol/glucose with 5:5 ratio. The cumulative biogas production was 298.2 mL, and the maximum production rate was 8 mL hr−1. The findings suggested that co-digestion is a potential method to achieve glycerol waste treatment and energy recovery at the same time. 相似文献
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The effect of total solids concentration and temperature on biogas production by anaerobic digestion 总被引:1,自引:0,他引:1
Zhiqiang Liu Jian Lv 《Energy Sources, Part A: Recovery, Utilization, and Environmental Effects》2016,38(23):3534-3541
This paper analyzed the effect of total solids (TS) concentration and temperature on biogas production from anaerobic digestion with dairy manure. Batch experiments were carried out for TS concentrations of 6%, 8%, and 10%, respectively, at five different temperatures (31, 34, 37, 40, and 43°C). Results showed that two factors both had significant effect on biogas production. The optimal condition for anaerobic digestion was 8% TS concentration at the temperature of 40°C. Under such condition, the biogas production is much better than the others and the yield peaked higher. Daily biogas production of 8% was more than those test groups which are 6% and 10% under the same temperature. When TS concentration was 8%, the rank of total biogas production of different digestion temperature test was 40 > 37 > 34 > 43 > 31°C, the biogas production of the 31, 34, 37, 40, and 43°C was 0.123, 0.159, 0.171, 0.205, and 0.153 L/g, respectively. 相似文献