TY - JOUR
T1 - Ammonium-nitrogen recovery as struvite from swine wastewater using various magnesium sources
AU - Ha, Thi Hanh
AU - Mahasti, Nicolaus N.N.
AU - Lu, Ming Chun
AU - Huang, Yao Hui
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/3/1
Y1 - 2023/3/1
N2 - Struvite (MgNH4PO4·6H2O) precipitation is widely used for nutrient recovery from swine wastewater. Additional magnesium source is required to produce struvite for nitrogen recovery due to the limited magnesium content in swine wastewater. The present study investigated the optimized condition for treating swine wastewater and producing struvite crystals using swine slurry, commercial MgCl2, and seawater as magnesium sources. The results showed that swine slurry as an alternative source is feasible both technically and economically. The struvite precipitation process using swine slurry at pH 9.0 and [P]0/ [Mg]0/ [N]0 M ratio = 1.2/1.0/1.0 achieved removal efficiencies of 82.7 %, 83.1 %, and 92.7 % for nitrogen, phosphorus, and magnesium, respectively. X-ray diffraction analysis validated the solid product consisted of struvite. Further investigations revealed the harvested precipitate had a struvite content of 72.7 % with low heavy metal impurity, which could be used as fertilizer. Nutrient recovery from swine manure is a future driver for the economic and environmental sustainability of agricultural and wastewater treatment processes.
AB - Struvite (MgNH4PO4·6H2O) precipitation is widely used for nutrient recovery from swine wastewater. Additional magnesium source is required to produce struvite for nitrogen recovery due to the limited magnesium content in swine wastewater. The present study investigated the optimized condition for treating swine wastewater and producing struvite crystals using swine slurry, commercial MgCl2, and seawater as magnesium sources. The results showed that swine slurry as an alternative source is feasible both technically and economically. The struvite precipitation process using swine slurry at pH 9.0 and [P]0/ [Mg]0/ [N]0 M ratio = 1.2/1.0/1.0 achieved removal efficiencies of 82.7 %, 83.1 %, and 92.7 % for nitrogen, phosphorus, and magnesium, respectively. X-ray diffraction analysis validated the solid product consisted of struvite. Further investigations revealed the harvested precipitate had a struvite content of 72.7 % with low heavy metal impurity, which could be used as fertilizer. Nutrient recovery from swine manure is a future driver for the economic and environmental sustainability of agricultural and wastewater treatment processes.
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U2 - 10.1016/j.seppur.2022.122870
DO - 10.1016/j.seppur.2022.122870
M3 - Article
AN - SCOPUS:85144412767
SN - 1383-5866
VL - 308
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 122870
ER -
