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Energy from waste
and biomass
Processes and equipment
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Sewage sludge
Like most waste materials, sewage sludge can be viewed as a problem – or an opportunity. It can be processed by:
- anaerobic digestion (AD) to produce a fuel gas called biogas;
- combusted with energy recovery to generate power; or
- dried and, if the heavy metal content is sufficiently low, used as a fertiliser.
Partial drying to around 30% dry solids is needed before combustion can be self-sustaining. Fluidised bed systems are generally used for municipal or industrial sludge combustion.
Darley & Associates have considerable experience with anaerobic digestion, drying and combustion processes and equipment and can assist with a consideration of process comparisons, equipment options, specifications, etc.
Construction of a rural AD facility
Containerised generator set for biogas
Biogas storage tank
Fluidised bed industrial sludge incinerator
Related links:
- fluidised beds
- waste heat boilers
- gas engines
- combined heat and power (CHP)
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