Hibridación Termosolar Navarra, SL (HTN Biogás), has a high-capacity agro-industrial co-digestion plant in Navarra for the treatment and energy recovery of organic livestock and agro-industrial waste through anaerobic digestion.
HTN Biogás has entrusted Aema (Water, Energy and Environment), a company specializing in water treatment , with the construction of a wastewater treatment plant capable of separating the solid and liquid phases of digestate at the lowest operating cost, in accordance with the parameters required by the relevant authorities. The objective is also to maximize nutrient recovery and convert the liquid digestate into reclaimed water for reuse and irrigation , at a flow rate of up to 1.000 m³/day.
The project consists of applying different technologies to transform wastewater and liquid digestate into regenerated water and a solid fraction, for fertilizer in crop fields or composting, through the application of sustainable environmental technologies , which allow obtaining biogas and new fertilizer products for agricultural application.
The processes that the liquid digestate will undergo are: physical-chemical treatment for the removal of solids and fats, ammonia degassing (stripping), biological treatment by activated sludge for the oxidation of organic matter and ultrafiltration using polymeric membranes to obtain a high quality effluent.
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