Dry anaerobic digestion (DAD) is an attractive method for the stabilization of solid organic waste with high solid concentration (22–40%). Dry digestion can be performed in a continuous or discontinuous system. Several digesters operate in parallel and allow a constant production of biogas over time.
Another advantage with dry digestion is the minimal generation of liquid digestate as the process does not use excess water as in the case of wet process. This enables generation of stable solid digestate which can be processed and sold.
Despite the advantages, the technology requires significant improvements owing to the following challenges - need for special equipment for loading and unloading, need for huge structural space, low methane yields and poor mixing. Several innovations are happening in these areas to enhance the efficiency of the process.
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Innovation sector
Source: Bekon
Source: Renergona
Source: Nordic Cleantech
Renewable Energy
Core sciences & engineering
Corporate researcher
Chemicals
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