An Incubation System to Enhance Biogas and Methane Production: A Case Study of an Existing Biogas Plant in Umbria, Italy

The pre-incubation of digestate and recycling of microbes inside a continuously stirred tank reactor (CSTR) are effective ways to optimize the anaerobic digestion process and improve the performance of biogas and methane production, also in existing biogas plants. In this study, a digestate incubation system using a nutrient mix to boost the activity of microbes was coupled to a CSTR to boost biogas and methane production. This system has been tested both on a lab scale and on an industrial scale. On a pilot scale, the system achieved an increase of +16.47 v% in biogas production with respect to the conventional anaerobic digestion process, and an increase of +2 v% in methane content (from 65.94 v% to 67.84 v%). On an industrial scale, the use of this incubation reactor with a capacity of 1 m3 has led to an increase in methane yield of 12 v%. This system allows to maintain the syntrophic relationship between acid-producing bacteria and methanogens and contemporary push the development of methanogens. Moreover, it is an economic system to be integrated into an existing biogas plant given the small volume and the simplicity of the incubation reactor.

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Solid Fraction of Digestate from Biogas Plant as a Material for Pellets Production

Energies ◽

10.3390/en14165034 ◽

2021 ◽

Vol 14 (16) ◽

pp. 5034

Author(s):

Wojciech Czekała

Keyword(s):

Anaerobic Digestion ◽

Solid Fraction ◽

Biogas Production ◽

Biogas Plant ◽

Biofuel Production ◽

Energy Potential ◽

Anaerobic Digestion Process ◽

Digestion Process ◽

Solid Biofuels ◽

Lower Heating Value

One of the anaerobic digestion process products in an agricultural biogas plant is digestate (digested pulp). Large quantities of digestate generated in the process of biogas production all over the world require proper management. Fertilization is the main management of this substrate, so it is essential to look for new alternatives. The work aims to determine and discuss the possibilities of using digestate solid fraction (DSF) for pellets as biofuel production. Pellets from DSF alone and pellets with sawdust, grain straw additives were analyzed. The lower heating value (LHV) based on the dry matter for all analyzed pellets ranged from 19,164 kJ∙kg−1 to 19,879 kJ∙kg−1. The ash content was similar for all four samples and ranged from 3.62% to 5.23%. This value is relatively high, which is related to the degree of fermentation in the anaerobic digestion process. The results showed that the DSF substrate after the anaerobic digestion process still has energy potential. Analyzing those results, it seems that DSF can be a highly valuable substrate for solid biofuels production.

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Büyükbaş Hayvan Atıkları için Kurulacak Havasız Çürütme Tesisinin Ekonomik Analizi / The Economical Analysis of Cattle Manure Treatment by Anaerobic Digestion Process

Journal of History Culture and Art Research ◽

10.7596/taksad.v1i4.143 ◽

2013 ◽

Vol 1 (4) ◽

pp. 360

Author(s):

Tamer Coşkun

Keyword(s):

Anaerobic Digestion ◽

Biogas Production ◽

Pilot Scale ◽

Corn Silage ◽

Cattle Manure ◽

Electricity Production ◽

Anaerobic Digestion Process ◽

Economical Analysis ◽

Digestion Process ◽

Manure Treatment

Büyükbaş hayvan atıkları, içeriğindeki yüksek katı madde, organik kirlilik ve patojen mikroorganizmalar sebebiyle halk sağlığı açısından olumsuz etkiler yapabilecek bir atıktır. Bu çalışmada havasız çürütme ile atıkların stabilize edilerek biyogaz elde edilmesi ve çürümüş atıkların toprakta doğal gübre olarak kullanılmasını içeren bir yönetim modeli uygulanmıştır. Bunun için pilot ölçekli bir havasız çürütme reaktörü işletilmiş ve çürümüş atıklar çeşitli dozlarda yonca, Macar fiğ ve arpa karışımı ile mısır silajı bitkilerinin ekildiği alanlarda doğal gübre olarak toprağa eklenmiştir. Havasız çürütme işleminde yarımcı materyal olarak mısır silajı da reaktöre beslenmiştir. Çalışma sonunda elde edilen sonuçlar ve literatür yardımıyla 1000 baş hayvan için kurulum ve işletme maliyetleri hesaplanmıştır. Kurulum maliyeti; elektrik üretim sisteminin kurulup kurulmaması açısından iki farklı değer olarak hesaplanmıştır. İşletme maliyetleri farklı tarla ürünleri ve yine elektrik sisteminin kurulup kurulmaması açılarından çeşitli durumlar için hesaplanmıştır. Sonuç olarak elde edilen en iyi sonuçlara göre; çürümüş atıklar Macar fiğ ve arpa karışımı bitkisinin ekiminde kullanıldığında kurulacak tesisin elektrik üretim sistemi de kurulduğunda 2,5 yılda, elektrik üretim sistemi kurulmadığında ise 2,1 yılda kendisini amorti ettiği bulunmuştur. The Economical Analysis of Cattle Manure Treatment by Anaerobic Digestion Process Cattle manure is a potential for causing detrimental effects on human health due to its high solid matter and pathogen microorganism content. In this study, it was aimed to achieve biogas production by stabilizing the waste using anaerobic digestion. Digested waste was utilized as natural fertilizer. For that reason, a pilot-scale anaerobic digestion tank was operated and digested wastes were added to soil in diverse dosages where alfalfa, the mixture of Hungarian vetch and barley and corn silage are planted. Corn silage was fed to the reactor as a supplementary material during anaerobic digestion process. Installation and operating costs are determined for 1,000 cattle by the results obtained and the literature datas. Installation cost was evaluated considering both installed electricity producted system and non-installed electricity producted system. As a result, according to best results, the system would pay for itself in 2. 5 years when electricity production system is installed while the system is not installed, the pay off would be realized in 2. 1 years for the mixture of Hungarian vetch and barley.

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Direct interspecies electron transfer performance through nanoparticles (NPs) for biogas production in the anaerobic digestion process

International Journal of Environmental Science and Technology ◽

10.1007/s13762-021-03664-w ◽

2021 ◽

Author(s):

P. Jadhav ◽

M. Nasrullah ◽

A. W. Zularisam ◽

P. Bhuyar ◽

S. Krishnan ◽

...

Keyword(s):

Electron Transfer ◽

Anaerobic Digestion ◽

Biogas Production ◽

Transfer Performance ◽

Anaerobic Digestion Process ◽

Digestion Process ◽

Direct Interspecies Electron Transfer ◽

Interspecies Electron Transfer

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Techniques for Quantifying Methane Production Potential in the Anaerobic Digestion Process

Waste and Biomass Valorization ◽

10.1007/s12649-021-01636-2 ◽

2021 ◽

Author(s):

Miguel Casallas-Ojeda ◽

Sully Meneses-Bejarano ◽

Ronald Urueña-Argote ◽

Luis Fernando Marmolejo-Rebellón ◽

Patricia Torres-Lozada

Keyword(s):

Anaerobic Digestion ◽

Methane Production ◽

Production Potential ◽

Anaerobic Digestion Process ◽

Digestion Process ◽

Methane Production Potential

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Operational Parameters of Biogas Plants: A Review and Evaluation Study

Energies ◽

10.3390/en13153761 ◽

2020 ◽

Vol 13 (15) ◽

pp. 3761 ◽

Cited By ~ 5

Author(s):

Abdullah Nsair ◽

Senem Onen Cinar ◽

Ayah Alassali ◽

Hani Abu Qdais ◽

Kerstin Kuchta

Keyword(s):

Anaerobic Digestion ◽

Review Paper ◽

Biogas Production ◽

Evaluation Study ◽

Biogas Plant ◽

Operational Parameters ◽

Digestion Process ◽

Design Considerations ◽

Biogas Plants ◽

Main Factors

The biogas production technology has improved over the last years for the aim of reducing the costs of the process, increasing the biogas yields, and minimizing the greenhouse gas emissions. To obtain a stable and efficient biogas production, there are several design considerations and operational parameters to be taken into account. Besides, adapting the process to unanticipated conditions can be achieved by adequate monitoring of various operational parameters. This paper reviews the research that has been conducted over the last years. This review paper summarizes the developments in biogas design and operation, while highlighting the main factors that affect the efficiency of the anaerobic digestion process. The study’s outcomes revealed that the optimum operational values of the main parameters may vary from one biogas plant to another. Additionally, the negative conditions that should be avoided while operating a biogas plant were identified.

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Improved ADM1 for modelling C, N, P fates in anaerobic digestion process of pig manure and optimization approaches to biogas production

Renewable Energy ◽

10.1016/j.renene.2019.08.086 ◽

2020 ◽

Vol 146 ◽

pp. 2330-2336 ◽

Cited By ~ 4

Author(s):

Heng Li ◽

Zheng Chen ◽

Dun Fu ◽

Yuanpeng Wang ◽

Yanmei Zheng ◽

...

Keyword(s):

Anaerobic Digestion ◽

Biogas Production ◽

Pig Manure ◽

Anaerobic Digestion Process ◽

Digestion Process

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Degradation of veterinary antibiotics during anaerobic digestion of dairy manure

Water Practice & Technology ◽

10.2166/wpt.2015.061 ◽

2015 ◽

Vol 10 (3) ◽

pp. 532-537 ◽

Cited By ~ 3

Author(s):

Yumika Kitazono ◽

Ikko Ihara ◽

Kiyohiko Toyoda ◽

Kazutaka Umetsu

Keyword(s):

Anaerobic Digestion ◽

Biogas Production ◽

Dairy Manure ◽

Antibiotic Residues ◽

Veterinary Antibiotics ◽

Livestock Manure ◽

Anaerobic Digestion Process ◽

Digestion Process ◽

Antibiotic Degradation

This study evaluated antibiotic degradation and biogas production during anaerobic digestion of dairy manure contained two common veterinary antibiotics at 37 °C. After 18 days of digestion, the concentration of chlortetracycline (CTC) decreased more than 80% regardless of the initial CTC concentration. The concentration of cefazolin (CEZ) decreased from 10 to 0.08 mg/L in 6 days. Less than 50 mg/L CTC and 10 mg/L CEZ had negligible impact on biogas production during anaerobic digestion process. The result showed that the anaerobic digestion has a potential to degrade antibiotic residues in livestock manure.

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