Process design and dynamics of a series of continuously fed aerated tank reactors treating dairy manure

Nitrogen Recovery from Different Livestock Slurries with an Innovative Stripping Process

“…The development of various treatment technologies for manure management (e.g., anaerobic digestion and solid-liquid separation) has led to the mitigation of several aspects, including the odor problem, nutrient recovery or removal, energy production, improvement of fertilizer value, and the reduction of the pollution potential and GHG emission [7][8][9]. In most treatment processes, the removal of Carbon (C), N and P has been the main objective, which can be achieved through the nitrification-denitrification process that releases C as CO 2 and N as N 2 to the air [10,11].…”

“…However, in view of sustainable processes to be listed within the circular economy principles, the main goal should be the recovery of nutrients and not only the reduction of nutrients and of emissions to the atmosphere [10,12]. In this context, N recovery plays a fundamental role because it is beneficial in two ways: first, for the minimization of the negative environmental impacts (acidification and eutrophication) and the consequent social benefit for human health (PM2.5 formation); second for the revenue generation by the transformation of N to nitrogenous fertilizers [13], thus, enhancing the relationship of livestock manures with a circular economy [14].…”