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바닷물을 이용한 struvite 형성으로 혐기성 소화액으로부터 질소, 인 회수
김용범 ( Yong Beon Kim ),안종화 ( Johng Hwa Ahn ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.4
This study was performed to evaluate the effect of pH (8-12) and molar ratio of magnesium and phosphate ([Mg2+]/[PO43-]) (0.6-1.4) on struvite crystallization of anaerobic digester supernatant using seawater as magnesium source. pH range of 9-10 is favorable for ammonium and phosphate recoveries. The recovery efficiency of ammonium was highest at [Mg2+]/[PO43-] of 1.0 and pH 10. On the other hand, high phosphate recovery efficiency (> 99%) was achieved at ([Mg2+]/[PO43-]) of 1.4 and pH 10. The results demonstrated that seawater can be considered as low-cost magnesium source to recover phosphorus from anaerobic digester supernatant.