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"MIDA: Turning Wastes into Value" is a renewable energy module developed by Biotec Sys as part of the architectural project by "Luca Guerra Architettura" for the "Daegu Gosan public library international competition" (, South Corea.

"MIDA" stands for Multiphase Integrated Digestion in Anaerobiosis: Turning Wastes into Value.

The MIDA project is an innovative solution for Smart Cities. It is an innovative approach to waste and wastewater management through Multiphase Anaerobic Digestion, a biological way to get energy from organic matter by means of microorganisms.

In modern cities, there is a network that is usually considered not related to energy in any way: the sewage system for wastewater collection. One may think that sewage is a system you can put many things in, but you cannot get anything useful out. Nevertheless, one should consider that the sewage network collects organic matter from all over the city. And organic matter is energy.

The MIDA system has been thought to implement Multiphase Anaerobic Digestion in urban contexts, to reduce the impact of human activities and get the best economic advantage from smart waste management through production of renewable energy.

The Integration of different available wastes can be achieved due to the high flexibility of the Multiphase digestion System. The conversion of organic matter into biogas is carried out by means of a Multiphase Anaerobic Digestion system, in which specialized microorganisms demolish the organic matter of wastes and wastewaters to produce biogas. The fraction of organic matter that cannot be converted is then returned to the sewage, in a stream that contains only a fraction of the polluting content of the original wastewater. Biogas is used in a gas motor to produce renewable energy. Depending on the local requirements, the energetic output can be electric and thermal energy or thermal energy only.

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