Biogas Plant
Categories: Engineering Lab EquipmentIn a biogas plant, microorganisms biologically degradate the organic starting substances (substrate) under exclusion of light and oxygen. The product of this anaerobic degradation is a gas mixture whi...
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Description
In a biogas plant, microorganisms biologically degradate the organic starting substances (substrate) under exclusion of light and oxygen. The product of this anaerobic degradation is a gas mixture which primarily consists of methane. This gas mixture is called biogas.
The experimental plant it serves to demonstrate the generation of biogas in a practical manner. The substrate is a suspension of shredded organic solids. It is hydrolysed and acidified in the first stirred tank reactor. Here, anaerobic microorganisms convert the long-chain organic substances into short-chain organic substances. The biogas forms in the second stirred tank reactor in the last step of the anaerobic degradation. It contains mainly methane and carbon dioxide. This two-stage method enables the ambient conditions to be adjusted and optimised in both reactors separately. The digestate is collected in a separate tank.
Learning Objectives/Experiments
Achieving a stable operating state
Influence of the following parameters on the biogas generation
Temperature
Substrate
Volumetric loading
pH value
Influence of the operation mode on the biogas yield
Single stage or dual stage
With and without post-fermentation
Continuous and discontinuous
Determining the following parameters depending on the operating conditions
Biogas yield
Biogas flow rate
Biogas quality
Specification
Two-stage biogas plant (continuous or discontinuous operation possible)
2 stirred tank reactors made of stainless steel with capacitive level sensors
Separate supply unit with substrate tank and feed pump
Control of temperature and pH value in the reactors
2 metering pumps for acid and caustic
Heating water circuit with tank, heater, temperature controller and pump
Biogas is dried with silica gel
Biogas analysis: flow rate, methane content, carbon dioxide content, humidity and temperature
Control of the experimental plant using a PLC, operated by touch screen
Technical data
Tanks made of stainless steel
reactor (stage 1): approx. 20L
reactor (stage 2): approx. 70L
substrate tank: approx. 25L
digestate tank: approx. 25L
Pumps
3 peristaltic pumps: each max. 25L/h
2 metering pumps: each max. 2,1L/h
heating water pump: max. 480L/h
Stirring machines
substrate tank: max. 200min-1
reactors: each max. 120min-1
Measuring ranges
methane content: 0…100%,
carbon dioxide content: 0…100%
flow rate: 0…30NL/h (biogas)
pH value: 2x 1…14
humidity: 0…100%
temperature: 3x 0…100°C (reactors and biogas)
400V, 50Hz, 3 phases
400V, 60Hz, 3 phases; 230V, 60Hz, 3 phases
quick overview :
In a biogas plant, microorganisms biologically degradate the organic starting substances (substrate) under exclusion of light and oxygen. The product of this anaerobic degradation is a gas mixture which primarily consists of methane. This gas mixture is called biogas.
The experimental plant it serves to demonstrate the generation of biogas in a practical manner. The substrate is a suspension of shredded organic solids. It is hydrolysed and acidified in the first stirred tank reactor. Here, anaerobic microorganisms convert the long-chain organic substances into short-chain organic substances. The biogas forms in the second stirred tank reactor in the last step of the anaerobic degradation. It contains mainly methane and carbon dioxide. This two-stage method enables the ambient conditions to be adjusted and optimised in both reactors separately. The digestate is collected in a separate tank.
Learning Objectives/Experiments
Achieving a stable operating state
Influence of the following parameters on the biogas generation
Temperature
Substrate
Volumetric loading
pH value
Influence of the operation mode on the biogas yield
Single stage or dual stage
With and without post-fermentation
Continuous and discontinuous
Determining the following parameters depending on the operating conditions
Biogas yield
Biogas flow rate
Biogas quality
Specification
Two-stage biogas plant (continuous or discontinuous operation possible)
2 stirred tank reactors made of stainless steel with capacitive level sensors
Separate supply unit with substrate tank and feed pump
Control of temperature and pH value in the reactors
2 metering pumps for acid and caustic
Heating water circuit with tank, heater, temperature controller and pump
Biogas is dried with silica gel
Biogas analysis: flow rate, methane content, carbon dioxide content, humidity and temperature
Control of the experimental plant using a PLC, operated by touch screen
Technical data
Tanks made of stainless steel
reactor (stage 1): approx. 20L
reactor (stage 2): approx. 70L
substrate tank: approx. 25L
digestate tank: approx. 25L
Pumps
3 peristaltic pumps: each max. 25L/h
2 metering pumps: each max. 2,1L/h
heating water pump: max. 480L/h
Stirring machines
substrate tank: max. 200min-1
reactors: each max. 120min-1
Measuring ranges
methane content: 0…100%,
carbon dioxide content: 0…100%
flow rate: 0…30NL/h (biogas)
pH value: 2x 1…14
humidity: 0…100%
temperature: 3x 0…100°C (reactors and biogas)
400V, 50Hz, 3 phases
400V, 60Hz, 3 phases; 230V, 60Hz, 3 phases
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