Organic fraction of municipal solid waste
The BIOTIM® dry AD design starts with a pretreatment (shredding and sieving) to remove plastics, pieces of wood and metal. Due to the significant presence of garden waste (wood, soil, sand), the organic content is limited and the biomass quite dry compared to f.i. kitchen and restaurant waste.
In a first hydrolysis reactor, the substrate is turned into a homogenous mass before being pumped to a thermophilic digester for biogas production. The biogas undergoes a desulphurization step before being converted into heat and power, used to heat the digester and operate the plant.
The digestate can be either turned into a high standard fertilizer after drying in Waterleau’s HYDROGONE® dryer, or mixed with structure material and composted into a commercial product.