REMOVAL AND RECOVERY OF PHOSPHATE AND AMMONIUM AS STRUVITE FROM SUPERNATANT IN ANAEROBIC DIGESTION

TSUNO H. / YAO M. / YOSHINO M. / et al. - ARTICLE DE PERIODIQUE - 2003

Reaction kinetics and design parameters of struvite production (generated by phosphate, ammonium nitrogen, magnesium and hydroxide ions) are experimentally investigated through a batch experiment using artificial wastewater sludge (from a sewage treatment plant) and a continuous struvite generation. The experiments were performed in anaerobic conditions and used basic reaction type and draft-tube type reactors. A developed equation is verified for its applicability. 92% removal and recovery efficiency with effluent phosphorus concentration of 17 mg/l is achieved under 4 minutes time and a pH of 8.5