Solid-liquid (S/L) separation of digestate (D) represents a simple technology able to produce two fractions having different composition. The aim of this work was to study the effect of S/L separation on dry matter (DM), nitrogen (TKN), phosphorus (P2O5) and heavy metals (HM) repartition into these two fractions and to characterize them. Therefore, thirteen full-scale digestion plants were studied and D, LF and SF were collected during three seasons of the year. Results obtained indicated that unexpectedly, on a mass balance, the liquid fraction still contains the majority of DM, i.e. 67% of the total of D. LF also contained 87% and 71% of TKN and P2O5respectively. HM contents were in line with typical NP-organic fertilizers. Chemical characterization suggested that the LF can be used as a substitute for mineral N fertilizers because of its high N content, while SF can be proposed as an NP-organic fertilizer.
Solid and liquid fractionation of digestate: Mass balance, chemical characterization, and agronomic and environmental value / F. Tambone, V. Orzi, G. D'Imporzano, F. Adani. - In: BIORESOURCE TECHNOLOGY. - ISSN 0960-8524. - 243(2017 Nov), pp. 1251-1256.
|Titolo:||Solid and liquid fractionation of digestate: Mass balance, chemical characterization, and agronomic and environmental value|
TAMBONE, FULVIA (Corresponding)
|Parole Chiave:||digestate; liquid fraction; mass balance; solid fraction; solid/liquid separation; agriculture; metals, heavy; fertilizers; nitrogen; phosphorus; bioengineering; environmental engineering; renewable energy, sustainability and the environment; waste management and disposal|
|Settore Scientifico Disciplinare:||Settore AGR/13 - Chimica Agraria|
|Data di pubblicazione:||nov-2017|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.biortech.2017.07.130|
|Appare nelle tipologie:||01 - Articolo su periodico|