scholarly journals Economic and Technical Evaluation of Flexible Power Generation Scenarios for a Biogas Plant

2020 ◽  
Vol 8 (2) ◽  
pp. 328-343 ◽  
Author(s):  
Ervin Saracevic ◽  
Franz Theuretzbacher ◽  
David Woess ◽  
Anton Friedl ◽  
Angela Miltner
Keyword(s):  
Power Generation ◽  
Biogas Plant ◽  
Technical Evaluation

scholarly journals Integration of centralized biogas plant in cold-snowy region in Japan

2011 ◽  
Vol 27 (3) ◽  
pp. 405-414 ◽  
Author(s):  
K. Umetsu ◽  
C. Ying ◽  
S. Kikuchi ◽  
M. Iwasaki ◽  
Y. Takeuchi ◽  
...  
Keyword(s):  
Power Generation ◽  
Biogas Production ◽  
Average Power ◽  
Local Economy ◽  
Biogas Plant ◽  
Operational Performance ◽  
Power Company ◽  
Plant Utilization ◽  
Centralized Biogas Plant ◽  
Economic Balance

A centralized biogas plant was built in Shikaoi town, Hokkaido, Japan to treat manure from 1320 cattle heads. The biogas plant was designed to operate at a feeding amount of 85.8 t/day, a hydraulic retention time (HRT) of 37 days and at a digester temperature of 38 ?C. In this study, the operational performance of biogas plant, utilization of digested slurry and economic balance were investigated. Since the working conditions of the plant became stable, the biogas production was 2,687 m3/day, 92% of produced biogas was consumed in power generation. Average methane concentration in produced biogas was 57.7%. The hydrogen sulfide (H2S) concentration was decreased to below 140 ppm as a result of bio-desulfurization and dry-desulfurization. The average power generation was 3,737 kwh/day and from that 54% of produced biogas was consumed in the facility operation, while 46% was sold to Power Company. About 20,260 t of digested slurry were applied onto 602 ha grassland and agricultural fields. From the results of the operational performance of the plant and the economic balance evidence, it is evident that the centralized biogas plant has a positive effect on the local economy.

scholarly journals Utilization of Food and Agricultural Residues for a Flexible Biogas Production: Process Stability and Effects on Needed Biogas Storage Capacities

Energies ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2678 ◽  
Author(s):  
Ervin Saracevic ◽  
Susanne Frühauf ◽  
Angela Miltner ◽  
Kwankao Karnpakdee ◽  
Bernhard Munk ◽  
...  
Keyword(s):  
Power Generation ◽  
Ph Value ◽  
Continuous Fermentation ◽  
Biogas Production ◽  
Biogas Plant ◽  
Feeding Strategies ◽  
Peak Time ◽  
Process Stability ◽  
Stability Parameters ◽  
Ammonia Content

Biogas plants can contribute to future energy systems’ stability through flexible power generation. To provide power flexibly, a demand-oriented biogas supply is necessary, which may be ensured by applying flexible feeding strategies. In this study, the impacts of applying three different feeding strategies (1x, 3x and 9x feeding per day) on the biogas and methane production and process stability parameters were determined for a biogas plant with a focus on waste treatment. Two feedstocks that differed in (1) high fat and (2) higher carbohydrate content were investigated during semi-continuous fermentation tests. Measurements of the short chain fatty acids concentration, pH value, TVA/TIC ratio and total ammonium and ammonia content along with a molecular biology analysis were conducted to assess the effects on process stability. The results show that flexible biogas production can be obtained without negative impacts on the process performance and that production peaks in biogas and methane can be significantly shifted to another time by changing feeding intervals. Implementing the fermentation tests’ results into a biogas plant simulation model and an assessment of power generation scenarios focusing on peak-time power generation revealed a considerable reduction potential for the needed biogas storage capacity of up to 73.7%.

scholarly journals Optimization of Aeration Technique for the Reduction of Impurities (Corrosive Gases) from Biogas

1970 ◽  
Vol 46 (3) ◽  
pp. 339-342
Author(s):  
SMA Sujan ◽  
MS Bashar ◽  
M Rahaman ◽  
MN Haque ◽  
MY Miah ◽  
...  
Keyword(s):  
Power Generation ◽  
Hydrogen Sulfide ◽  
Anaerobic Digestion ◽  
Cost Effective ◽  
Gas Production ◽  
Biogas Plant ◽  
Air Injection ◽  
Injection Technique ◽  
Effective Power ◽  
Carbon Dioxide Co2

Biogas, produced from organic waste through anaerobic digestion (AD), is mainly composed of methane (CH4) and carbon dioxide (CO2) with smaller amount of hydrogen sulfide (H2S) and nitrogen (N2). Trace amount of some other gases are occasionally present in biogas. For electricity generation from biogas, reduction of H2S is necessary because it is toxic and corrosive to most of the equipments. Reduction of Hydrogen Sulfide (H2S) from poultry based biogas (normally it contents 1500~2500 ppm) can be done by dosing air/oxygen to the main digester during the digestion process. Two methods of air injection technique have been followed for optimization of the process. Firstly two hour interval air injection and secondly air injection based on percentage of hourly gas production. The optimum air percentage to minimize H2S should be at least 3.00%. After aeration H2S level comes to the desired level (<50ppm) within 1.5-2.0 hours and remains constant up to 7-9 hours and biogas can be used for effective power generation. A complete aeration system has been developed which is simple and cost effective for H2S reduction to the desired level from poultry based biogas plant. This system can be applied for any size of poultry based biogas plant for effective power generation. Key words: Anaerobic digestion; Hydrogen Sulfide (H2S); Aeration; Biogas digester; Power generation DOI: http://dx.doi.org/10.3329/bjsir.v46i3.9040 BJSIR 2011; 46(3): 339-342

Environmental and economic analysis of power generation in a thermophilic biogas plant

2018 ◽  
Vol 633 ◽  
pp. 1418-1428 ◽  
Author(s):  
D. Ruiz ◽  
G. San Miguel ◽  
B. Corona ◽  
A. Gaitero ◽  
A. Domínguez
Keyword(s):  
Power Generation ◽  
Economic Analysis ◽  
Biogas Plant

scholarly journals Economic and Global Warming Potential Assessment of Flexible Power Generation with Biogas Plants

2019 ◽  
Vol 11 (9) ◽  
pp. 2530 ◽  
Author(s):  
Ervin Saracevic ◽  
Daniel Koch ◽  
Bernhard Stuermer ◽  
Bettina Mihalyi ◽  
Angela Miltner ◽  
...  
Keyword(s):  
Power Generation ◽  
Global Warming ◽  
Global Warming Potential ◽  
Power Plants ◽  
Economic Assessment ◽  
Energy System ◽  
Biogas Plant ◽  
Ghg Mitigation ◽  
Power Sources ◽  
Biogas Plants

Demand-oriented power generation by power plants is becoming increasingly important due to the rising share of intermittent power sources in the energy system. Biogas plants can contribute to electricity grid stability through flexible power generation. This work involved conducting an economic and global warming potential (GWP) assessment of power generation with biogas plants that focused on the Austrian biogas sector. Twelve biogas plant configurations with electric rated outputs ranging from 150–750 kW and different input material compositions were investigated. The results from the economic assessment reveal that the required additional payment (premium) to make power generation economically viable ranges from 158.1–217.3 € MWh−1. Further, the GWP of biogas plant setups was analyzed using life cycle assessment. The results range from −0.42 to 0.06 t CO2 eq. MWh−1 and show that the 150 kW plant configurations yield the best outcome regarding GWP. Electricity from biogas in all scenarios outperformed the compared conventional electricity sources within the GWP. Greenhouse gas (GHG) mitigation costs were calculated by relating the needed premium to the CO2 eq. saving potential and range from 149.5–674.1 € (t CO2 eq.)−1.

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