Biogas Processes - invent

invent.hs.bremen.de

Biogas Processes - invent

INVENT - Integrated Waste Management modules for different courses of graduate studies

Biogas processes: organic substrates for the

decentralized production of regenerative energy

• Introduction

• biological processes

• substrates and biogas yields

• Practical experience

• Summary


INVENT - Integrated Waste Management modules for different courses of graduate studies


INVENT - Integrated Waste Management modules for different courses of graduate studies


INVENT - Integrated Waste Management modules for different courses of graduate studies


INVENT - Integrated Waste Management modules for different courses of graduate studies


INVENT - Integrated Waste Management modules for different courses of graduate studies


INVENT - Integrated Waste Management modules for different courses of graduate studies


INVENT - Integrated Waste Management modules for different courses of graduate studies

The phases of methane production – schematic diagram


INVENT - Integrated Waste Management modules for different courses of graduate studies

Substrate input for biogas process: organic wastes

residues from food

production

food waste

garden and street-cleaning waste


INVENT - Integrated Waste Management modules for different courses of graduate studies

Temperature as major factor for MO activity

• psychrophile: around 10°C

• mesophile: 32 to 50 °C

• thermophile: 50 to 70°C

• temperature influences retention time

pH varies over methane production process

• hydrolysis and acidification stage: pH 4.6 to 6.3

• methanogenesis: pH 6.8 to 7.5

• too low pH inhibit MOs of methanogenesis

Process Parameters

retention time

• dependent on temperature, reactor capacity,

substrate concentration of reactor and desired

degree of degradation


INVENT - Integrated Waste Management modules for different courses of graduate studies

Factors influencing the biogas yield

Weiland, 2001


Organic waste

INVENT - Integrated Waste Management modules for different courses of graduate studies


INVENT - Integrated Waste Management modules for different courses of graduate studies

Biogas yield from

Organic waste


INVENT - Integrated Waste Management modules for different courses of graduate studies

Biogas potential in Germany

No. of plants

installed el.capacity

(MW)

Source: German Biogas Association


INVENT - Integrated Waste Management modules for different courses of graduate studies

biogas technology

http://nawaro.ag


INVENT - Integrated Waste Management modules for different courses of graduate studies

Summary and other benefits


INVENT - Integrated Waste Management modules for different courses of graduate studies


INVENT - Integrated Waste Management modules for different courses of graduate studies

Thank you for your attention!

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