caa a22 4500 606170502 CHVBK 20210128100717.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s10098-015-0950-9 doi (NATIONALLICENCE)springer-10.1007/s10098-015-0950-9 Preliminary technical feasibility analysis of carbon dioxide absorption by ecological residual solvents rich in ammonia to be used in fertigation [Elektronische Daten] [Alexandra-Elena Bonet-Ruiz, Valentin Plesu, Jordi Bonet, Petrica Iancu, Joan Llorens] Carbon dioxide absorption using residual sludge rich in ammonia as absorbent is studied. Ammonia concentrations in residual sludge rich in ammonia are at low concentrations (<0.2wt%) compared to ammonia concentrations industrially used for carbon dioxide absorption solvents (8-10wt%). The proposed solution avoids emissions of ammonia and carbon dioxide at the same time. The resulting aqueous stream is useful for fertigation, and therefore, energy consumption for solvent recovery by absorption is not required. The stability of the output stream is checked. The relation between minimum required solvent flow rate, solvent concentration and C:N ratio is determined. Minimum flow rate of solvent is defined as the lowest solvent flowrate required to satisfy the separation problem, using infinite length absorption column. However, due to the low ammonia content required for a residual sludge with a C:N ratio suitable for algae growth (mass fractions from 0.000182 to 0.000063), a high flow rate of absorbent is still required (only from 10 to 20% flow rate decreases compared with pure water). Nevertheless, C:N ratios around 1 lead to a decrease of solvent flow rate requirements of 85.3% compared to pure water solvent. Although this ratio is not suitable for plant growth, terrestrial plants capture the carbon dioxide mainly from the atmosphere equilibrating the balance. An illustrative example is presented to show that irrigation water can become a suitable sink for carbon dioxide and ammonia, providing fertigation. Therefore, two residual streams (sludge and carbon dioxide) are converted into a useful fertigation stream which is of great importance because most of the water that humanity consumes is not only for drinking but for food production as well. Nowadays, ammonia studies on carbon dioxide absorption are controlled by the physical absorption (0% NH3) or by the chemical absorption (8-10% NH3), simplifying the modelling. The obtained results show the importance of the study and identification of the region where physical and chemical absorptions are both significant. Springer-Verlag Berlin Heidelberg, 2015 CO2 capture nationallicence Minimum absorbent flowrate nationallicence Residue valorisation nationallicence Bonet-Ruiz Alexandra-Elena Department of Chemical Engineering, University of Barcelona, 1, Martí i Franquès Street, 6th Floor, 08028, Barcelona, Spain aut Plesu Valentin Centre for Technology Transfer in Process Industries (CTTPI), University POLITEHNICA of Bucharest, 1, Gh. Polizu Street, Bldg A, Room A056, 011061, Bucharest, Romania aut Bonet Jordi Department of Chemical Engineering, University of Barcelona, 1, Martí i Franquès Street, 6th Floor, 08028, Barcelona, Spain aut Iancu Petrica Centre for Technology Transfer in Process Industries (CTTPI), University POLITEHNICA of Bucharest, 1, Gh. Polizu Street, Bldg A, Room A056, 011061, Bucharest, Romania aut Llorens Joan Department of Chemical Engineering, University of Barcelona, 1, Martí i Franquès Street, 6th Floor, 08028, Barcelona, Spain aut Clean Technologies and Environmental Policy Springer Berlin Heidelberg 17/5(2015-06-01), 1313-1321 1618-954X 17:5<1313 2015 17 10098 https://doi.org/10.1007/s10098-015-0950-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10098-015-0950-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bonet-Ruiz Alexandra-Elena Department of Chemical Engineering, University of Barcelona, 1, Martí i Franquès Street, 6th Floor, 08028, Barcelona, Spain aut NATIONALLICENCE 700 1- Plesu Valentin Centre for Technology Transfer in Process Industries (CTTPI), University POLITEHNICA of Bucharest, 1, Gh. Polizu Street, Bldg A, Room A056, 011061, Bucharest, Romania aut NATIONALLICENCE 700 1- Bonet Jordi Department of Chemical Engineering, University of Barcelona, 1, Martí i Franquès Street, 6th Floor, 08028, Barcelona, Spain aut NATIONALLICENCE 700 1- Iancu Petrica Centre for Technology Transfer in Process Industries (CTTPI), University POLITEHNICA of Bucharest, 1, Gh. Polizu Street, Bldg A, Room A056, 011061, Bucharest, Romania aut NATIONALLICENCE 700 1- Llorens Joan Department of Chemical Engineering, University of Barcelona, 1, Martí i Franquès Street, 6th Floor, 08028, Barcelona, Spain aut NATIONALLICENCE 773 0- Clean Technologies and Environmental Policy Springer Berlin Heidelberg 17/5(2015-06-01), 1313-1321 1618-954X 17:5<1313 2015 17 10098