微生物增强剂对牛粪-脱木质素废咖啡渣混合底物的生物消化产气及其动力学研究

Q3 Environmental Science
I. Sumantri, Peter Kusnadi, I. Handoyo, A. C. Kumoro
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引用次数: 1

摘要

已实施无害环境的能源战略,以应付迅速增加的全球能源需求。印度尼西亚的咖啡消费引发了废咖啡渣(SCG)产量的增加,这些废咖啡渣可以用作沼气原料。我们在这项研究中提供的新颖之处在于减少沼气的过早形成,因此我们可以通过调整合适的pH值和消化时间来延长废咖啡渣消化过程中的沼气产生期。本研究旨在利用有效微生物-4 (EM-4),以含牛粪和SCG的有机基质混合物为原料,以25:1的C/N比生产沼气。该工艺首先使用氢氧化钠溶液对SCG进行脱木质素处理,得到脱木质素SCG (DSCG)。在厌氧间歇消化(AD)系统中,通过改变pH值(5、7和9)和EM-4浓度(6%、9%和12%),在室温下对底物进行生物降解。在60天的消化过程中,每两天进行一次沼气产品和化学需氧量测量。结果表明,EM-4浓度的升高使初始产气量提前,产气量增大,产气时间延长;在pH值为7、EM-4负载量为9%的条件下,以25∶1的C/N比得到含牛粪和SCG的理想消化底物条件,可获得11.28 mL /g COD,产量提高100.2%。修正后的Gompertz方程具有较高的决定系数(R2 > 0.95),与实验数据拟合良好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Biodigestion of Mixed Substrates of Cow Manure-Delignified Spent Coffee Ground (DSCG) using Microorganism Enhancer for Biogas Production and Its Kinetic Study
Environmentally benign energy strategies have been implemented to cope with the rapidly increased global energy needs. Indonesia’s coffee consumption has triggered an increase in the generation of spent coffee ground (SCG) that can be used as a biogas raw material. The novelty that we offer in this research effort is to reduce the premature formation of biogas, so that we can extend the biogas production period during the digestion of spent coffee ground by adjusting the right pH and digestion time. This study aimed to produce biogas from an organic substrate mixture containing cow manure and SCG with a 25:1 C/N ratio by employing effective microorganisms-4 (EM-4). The process began with delignification of SCG using sodium hydroxide solution to obtain delignified SCG (DSCG). The biodegradation of the substrate was performed in an anaerobic batch digestion (AD) system at ambient temperature by varying pH (5, 7, and 9) and EM-4 concentration (6%, 9%, and 12%). The biogas product and chemical oxygen demand measurements were carried out every two days for 60 days of digestion. The results showed that the increase in EM-4 concentration induced earlier initial biogas production enhanced the volume, and extended the production time. The pH 7 level and 9% EM-4 loading gave the ideal digestion substrate condition containing cow manure and SCG with a 25:1 C/N ratio to obtain 11.28 mL of biogas/g COD with 100.2% production enhancement. The modified Gompertz equation fitted the experimental data very well as indicated by a high value of the coefficient of determination (R2 > 0.95).
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来源期刊
Environmental Research, Engineering and Management
Environmental Research, Engineering and Management Environmental Science-Environmental Engineering
CiteScore
2.40
自引率
0.00%
发文量
32
期刊介绍: First published in 1995, the journal Environmental Research, Engineering and Management (EREM) is an international multidisciplinary journal designed to serve as a roadmap for understanding complex issues and debates of sustainable development. EREM publishes peer-reviewed scientific papers which cover research in the fields of environmental science, engineering (pollution prevention, resource efficiency), management, energy (renewables), agricultural and biological sciences, and social sciences. EREM’s topics of interest include, but are not limited to, the following: environmental research, ecological monitoring, and climate change; environmental pollution – impact assessment, mitigation, and prevention; environmental engineering, sustainable production, and eco innovations; environmental management, strategy, standards, social responsibility; environmental economics, policy, and law; sustainable consumption and education.
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