TY - JOUR
T1 - Struvite precipitation as pretreatment method of mature landfill leachate
AU - Warmadewanthi, I. D.A.A.
AU - Zulkarnain, Muhammad Agung
AU - Ikhlas, Nurani
AU - Kurniawan, Setyo Budi
AU - Abdullah, Siti Rozaimah Sheikh
N1 - Publisher Copyright:
© 2021
PY - 2021/9
Y1 - 2021/9
N2 - The pretreatment method of mature landfill leachate during the dry session was evaluated using struvite precipitation. Then, magnesium sulfate (MgSO4·7H2O) and phosphoric acid wastewater were used as precipitation reagents. Visual MINTEQ was used to predict the formation of struvite and compared to the laboratory experiments. Effective magnesium dosage and pH were at [Mg]:[PO4] 2:1 and pH 9 ± 0.2 under initial phosphate content of leachate with ~28% ammonium, ~64% phosphate, and ~5% COD were removed. Removal efficiency was enhanced with the addition of phosphate with an effective molar ratio at [Mg]:[NH4]:[PO4] 2:2.5:1 or equal to 81.45 mL phosphoric wastewater. Experimental results were in good agreement with visual MINTEQ prediction when humic acid and mass transfer for ammonium were included. XRD and SEM-EDX examined the struvite content and crystal characteristics. Magnesite as alternative magnesium source was considered applicable to prevent excessive anion but altered the purity of the produced struvite.
AB - The pretreatment method of mature landfill leachate during the dry session was evaluated using struvite precipitation. Then, magnesium sulfate (MgSO4·7H2O) and phosphoric acid wastewater were used as precipitation reagents. Visual MINTEQ was used to predict the formation of struvite and compared to the laboratory experiments. Effective magnesium dosage and pH were at [Mg]:[PO4] 2:1 and pH 9 ± 0.2 under initial phosphate content of leachate with ~28% ammonium, ~64% phosphate, and ~5% COD were removed. Removal efficiency was enhanced with the addition of phosphate with an effective molar ratio at [Mg]:[NH4]:[PO4] 2:2.5:1 or equal to 81.45 mL phosphoric wastewater. Experimental results were in good agreement with visual MINTEQ prediction when humic acid and mass transfer for ammonium were included. XRD and SEM-EDX examined the struvite content and crystal characteristics. Magnesite as alternative magnesium source was considered applicable to prevent excessive anion but altered the purity of the produced struvite.
KW - Ammonium
KW - MINTEQ
KW - Magnesium dosage
KW - Phosphate dosage
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=85111743018&partnerID=8YFLogxK
U2 - 10.1016/j.biteb.2021.100792
DO - 10.1016/j.biteb.2021.100792
M3 - Article
AN - SCOPUS:85111743018
SN - 2589-014X
VL - 15
JO - Bioresource Technology Reports
JF - Bioresource Technology Reports
M1 - 100792
ER -
