Optimization of Reclaim Nitrogen and Phosphorus from Source-Separated Urine with Orthogonal Array Design
Urine source separation technology is a new concept for municipal wastewater management. With chemical precipitation theory to reclaim nitrogen and phosphorus from source-separated urine, MgCl2·6H2O and Na2HPO4·12H2O were used as additives in the experiment to generate the magnesium ammonium phosphate (MAP) precipitation. The factors that affect MAP precipitation are choosed as following: pH, PO4 3-:NH4+, Mg2+:NH4+and reaction temperature. Under the experimental conditions of reaction temperature=15℃, mixing speed=100r/min and reaction time=10min, the effects of pH, phosphate amount and magnesium ion concentration on nitrogen and phosphorous removal were investigated respectively. The optimum reaction conditions were got by orthogonal array experiment such as pH=9.5, Mg2+∶PO4 3-∶NH4+=1.3:1.0:1.0, and the experimental results demonstrated that NH4+-N was effectively removed from initial 2850 mg/L down to about 125mg/L, residual phosphate was about 7mg/L. SEM and EDS figures indicate that the main precipitate are orthorhombic magnesium ammonium phosphate.
Yong WEI Liang-fei DONG Bing-zhi DONG
College of Environmental Science and Engineering TongJi University Shanghai, PR China College of Env College of Environmental and Safety Engineering Jiangsu Polytechnic University Changzhou, PR China College of Environmental Science and Engineering TongJi University Shanghai, PR China
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）