Advantages and Disadvantages of biogas digester

 Advantages and Disadvantages of biogas digester

biogas plant diagram

 

Advantages  biogas digester

• Generation of biogas and fertiliser (almost complete retention of the fertiliser nutrients (N, P and K)
• Reduction of greenhouse gas emissions through methane recovery
• Combined treatment of different organic waste and wastewaters
• Reduction of solids to be handled (e.g. less excess sludge)
• Good pathogen removal depending on temperature
• Process stability (high-loads can be treated but anaerobic sludge can also be preserved for prolonged periods without any feeding)

 Disadvantages  biogas digester

• Small- and middle-scale anaerobic technology for the treatment of solid waste in middle- and low-income countries is still relatively new
• Experts are required for the design and construction, depending on scale may also for operation and maintenance
• Reuse of produced energy (e.g. transformation into, fire/light, heat and power) needs to be established
• High sensitivity of methanogenic bacteria to a large number of chemical compounds
• Sulphurous compounds can lead to odour

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