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What is one potential benefit of standardizing biogas plant sizes?
What is one potential benefit of standardizing biogas plant sizes?
The capacity of biogas plants that stop working in a year should be added to the new plants' capacity.
The capacity of biogas plants that stop working in a year should be added to the new plants' capacity.
False
What type of surveys can provide useful data for biogas survey development?
What type of surveys can provide useful data for biogas survey development?
Household or business energy surveys, population and housing censuses, etc.
Biogas plants' capacity can be updated using more _____ information.
Biogas plants' capacity can be updated using more _____ information.
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Match the following biogas surveying concepts with their descriptions:
Match the following biogas surveying concepts with their descriptions:
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What crucial information should energy statisticians include in national surveys regarding biogas?
What crucial information should energy statisticians include in national surveys regarding biogas?
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Most biogas plants have been built within the last decade in many countries.
Most biogas plants have been built within the last decade in many countries.
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What adjustment may not be necessary in most places when calculating net plant capacities?
What adjustment may not be necessary in most places when calculating net plant capacities?
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What is one reason for collecting data about biogas plants' sizes in a country?
What is one reason for collecting data about biogas plants' sizes in a country?
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The Deenbandhu biogas plants in India can produce more than 6 m3 of gas daily.
The Deenbandhu biogas plants in India can produce more than 6 m3 of gas daily.
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How many different sizes of biogas plants are built under the National Domestic Biogas and Manure Program in Bangladesh?
How many different sizes of biogas plants are built under the National Domestic Biogas and Manure Program in Bangladesh?
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Biogas plants designed to process _____ waste can produce significant amounts of biogas.
Biogas plants designed to process _____ waste can produce significant amounts of biogas.
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Match the biogas plant design to its expected daily gas production levels:
Match the biogas plant design to its expected daily gas production levels:
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What is suggested for biogas plant owners regarding their operational knowledge?
What is suggested for biogas plant owners regarding their operational knowledge?
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It is recommended that all biogas plants should be built to the same exact specifications.
It is recommended that all biogas plants should be built to the same exact specifications.
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Which type of waste is considered a high-value input that may increase biogas production?
Which type of waste is considered a high-value input that may increase biogas production?
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What is the purpose of converting daily gas production statistics during data processing?
What is the purpose of converting daily gas production statistics during data processing?
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Water added to the digester does not need to be recorded as part of the waste inputs.
Water added to the digester does not need to be recorded as part of the waste inputs.
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What is measured or estimated to calculate biogas production?
What is measured or estimated to calculate biogas production?
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The weight of waste produced by different animals can be used in the __________.
The weight of waste produced by different animals can be used in the __________.
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Match the type of waste with its typical classification:
Match the type of waste with its typical classification:
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What should the second question in the questionnaire focus on?
What should the second question in the questionnaire focus on?
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Hens produce a significant amount of waste that can be ignored in calculations.
Hens produce a significant amount of waste that can be ignored in calculations.
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What types of materials are excluded when feeding the digester?
What types of materials are excluded when feeding the digester?
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What is the primary purpose of the capacity building programme at IRENA?
What is the primary purpose of the capacity building programme at IRENA?
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Biogas data is typically reported in kilojoules (kJ).
Biogas data is typically reported in kilojoules (kJ).
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Name two ways to estimate or measure biogas production.
Name two ways to estimate or measure biogas production.
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As biogas is produced, slurry is pushed out from the digester through the outlet pipe into a __________.
As biogas is produced, slurry is pushed out from the digester through the outlet pipe into a __________.
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Match the following factors with their impact on biogas production:
Match the following factors with their impact on biogas production:
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Which of the following is NOT mentioned as a parameter affecting biogas production?
Which of the following is NOT mentioned as a parameter affecting biogas production?
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The guidance provided by IRENA includes conversion factors to convert cubic metres to megajoules (MJ).
The guidance provided by IRENA includes conversion factors to convert cubic metres to megajoules (MJ).
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What are two socio-economic impacts of biogas use that can be monitored?
What are two socio-economic impacts of biogas use that can be monitored?
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At what temperature range (°C) does biogas production yield the highest value with a retention time of 6-10 days?
At what temperature range (°C) does biogas production yield the highest value with a retention time of 6-10 days?
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Biogas production yields decrease as the retention time increases.
Biogas production yields decrease as the retention time increases.
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What is the yield factor for biogas production at a temperature of 28-30 °C with a feedstock retention time of 21-25 days?
What is the yield factor for biogas production at a temperature of 28-30 °C with a feedstock retention time of 21-25 days?
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The yield factor for biogas production at 36-40 °C and a feedstock retention time of 6-10 days is _____ .
The yield factor for biogas production at 36-40 °C and a feedstock retention time of 6-10 days is _____ .
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Match the retention time with the corresponding yield factor at 19-21 °C:
Match the retention time with the corresponding yield factor at 19-21 °C:
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Which temperature range gives a yield factor of 4.49 for a retention time of 21-25 days?
Which temperature range gives a yield factor of 4.49 for a retention time of 21-25 days?
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The yield factors for biogas production are constant across different temperature ranges.
The yield factors for biogas production are constant across different temperature ranges.
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Identify the yield factor for a retention time of 46-50 days at 31-33 °C.
Identify the yield factor for a retention time of 46-50 days at 31-33 °C.
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What was the average saving of fuelwood in households after switching to biogas in Bangladesh?
What was the average saving of fuelwood in households after switching to biogas in Bangladesh?
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Households with biogas plants use 1,100 kg/year more fuelwood than those without biogas plants.
Households with biogas plants use 1,100 kg/year more fuelwood than those without biogas plants.
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How many litres of LPG produce the same energy content as 1 kg of fuelwood in adjusted measurements?
How many litres of LPG produce the same energy content as 1 kg of fuelwood in adjusted measurements?
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Households that are connected to biogas plants can save ______ (amount) of fuelwood per month.
Households that are connected to biogas plants can save ______ (amount) of fuelwood per month.
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Match the types of fuels to their corresponding adjusted volume of biogas with the same energy content:
Match the types of fuels to their corresponding adjusted volume of biogas with the same energy content:
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Which of the following is NOT considered a disadvantage of measuring fuel consumption in households?
Which of the following is NOT considered a disadvantage of measuring fuel consumption in households?
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Fuel consumption comparisons should be adjusted for household size and location.
Fuel consumption comparisons should be adjusted for household size and location.
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What is the estimated annual fuelwood use in households with biogas plants?
What is the estimated annual fuelwood use in households with biogas plants?
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Study Notes
Measuring Small-Scale Biogas Capacity and Production
- IRENA (International Renewable Energy Agency) report on measuring small-scale biogas capacity and production
- Report provides guidance for energy statisticians
- Focuses on continuous process biogas plants (feedstocks added and biogas removed daily)
- Methods can be adapted for large-scale plants
1. Introduction
- Growing interest in small-scale biogas technologies in Africa, Asia, and Latin America
- Socio-economic and environmental benefits: reduced firewood/kerosene use, lower emissions, waste treatment
- Need for accurate monitoring and measurement of biogas capacity and production
Key Requirements for Digester Operation
- Airtight environment (no oxygen)
- Moderate temperature (20-45°C)
- No light
- Small feedstock particles (minimal lignin)
- Starter bacteria (for some feedstocks)
2. Main Parameters Affecting Biogas Production
- Digester technologies (fixed dome, floating drum, balloon/bag)
- Plant capacity (volume or expected daily production)
- Feedstock type and volume
- Feedstock retention time
- Temperature
3. Plant Capacity
- Administrative data (if available): biogas project records, number of plants, types, and sizes
- Survey of standardized plant types: if plants are standardized in design and size, measure plant diameter and use predetermined calculations
- Survey of biogas plant dimensions: Measure dimensions (diameter, height, length) to calculate plant volume and use appropriate formulas
4. Biogas Production and Consumption
- Plant capacity: to estimate daily production by multiplying plant capacity by a daily production factor
- Appliance use: measure biogas consumption of appliances, calculate average daily consumption and convert into a yearly estimate
- Feedstock use: determine the types and amounts of waste, the water content and calculate daily biogas production
- Fuel substitution: compare fuel use in households with and without biogas to estimate biogas consumption
- Direct measurement: Measure biogas production over time using specialized flow meters
5. Other Information about Biogas Production
- Financial and technical performance: issues in operation, maintenance, support from providers, and financing sources
- Emission reductions: calculate reductions in greenhouse gases from switching to biogas, using information on fuel used before implementation
- Energy access and socioeconomic impacts: time savings in fuel collection, health impacts of using biogas instead of other fuels
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Description
Explore the methods for measuring small-scale biogas capacity and production based on IRENA's comprehensive report. This quiz covers essential parameters affecting biogas production and highlights the socio-economic and environmental benefits of biogas technologies. Ideal for energy statisticians and those interested in renewable energy solutions.
