Open AccessLighting the anaerobic digestion process in rural areas: obtainment of struvite from bovine manure digestate
Author(s) -
Liliana del Pilar Castro-Molano,
Kenia Paola Vecino-Gutiérrez,
Luisa Jasbleidy Diaz-Moyano,
Jaime Jaimes-Estévez,
Humberto Escalante-Hernández
Publication year - 2018
Publication title -
revista colombiana de biotecnologia/revista colombiana de biotecnología
Language(s) - English
Resource type - Journals
eISSN - 0123-3475
pISSN - 1909-8758
DOI - 10.15446/rev.colomb.biote.v20n2.71184
Subject(s) - digestate , struvite , anaerobic digestion , manure , pulp and paper industry , biogas , yield (engineering) , chemistry , cow dung , fertilizer , materials science , nuclear chemistry , magnesium , waste management , agronomy , methane , metallurgy , organic chemistry , engineering , biology
The objective of this research was to obtain struvite from digested matter from a bio rural digester fed with bovine manure. To determine operating variables to recover struvite (PO43- and NH4+ ions), researchers developed an experiment design in which they evaluated the combined effect of the Mg2+: PO43- molar ratio (1.5:1; 2.5:1 and 3.5:1), reaction time (10, 50 and 90 min) and stirring speed (100, 450 and 800 rpm). The recovery rates obtained were 55±4.94 % and 58±7.72 % for NH4+ and PO43- respectively. The favorable conditions were 1.5 molar ratio, 50 minute reaction time and 450 rpm stirring speed. Struvite crystal formation and composition were confirmed using petrographic microscopy and infrared radiation. Struvite yield was 295.75 mg /l from digestate employed.