Biogas is produced by the fermentation of organic substances of animal and vegetal origin in absence of oxygen (anaerobic process). This process produces a highly conductive aqueous stream contaminated by heavy metals, called digestate. It also contains a high concentration of ammonia, nitric nitrogen, methane, phosphorus and BOD. Due to this specific chemical composition, environmental regulations often do not allow it to spread directly to the fields.
Anaerobic digestion wastewater and digestate treatments
Combining industrial performance and sustainable development while remaining competitive requires that the biogas and biofuels industry ensure safe industrial processes, that reduce operational costs, providing significant savings, and that implement solutions to comply with environmental regulations, which ultimately lead to the public’s acceptance of a site.
EVALED® evaporators are a technological solution for:
- Treatment of digestate using hot water coming from cogeneration
- Treatment of streams highly concentrated in sugars, to obtain a by-product for biogas plants feeding