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- W2357202261 abstract "[Objective] This study aimed to determine the optimal technical parameters for the swine wastewater treatment by struvite precipitation.[Method] Central composite design(CCD) and response surface method(RSM) were employed to study the effects of struvite precipitation on removing the ammonia nitrogen in the swine wastewater.Quadratic model was developed to describe the mathematical relationships between the investigated factors of pH value,reaction time,magnesium to nitrogen molar ratio(Mg/P),nitrogen to phosphorus molar ratio(N/P),the investigated indicators of NH4-N removal efficiency and residual PO43——P concentration.Contour overlay plot was proposed to predict the optimal experimental conditions with the NH4-N removal efficiency of 75% and residual PO43——P concentration of 3.0 mg/L as the desired values.[Result] At pH of 10.0,mixing time of 30 min,Mg/N of 1.11,N/P of 1.14,the NH4-N removal efficiency(Y1) was the maximum of 79.0%,and the residual PO43——P concentration(Y2) at this time was 0.35 mg/L.The verification test of the optimal conditions proved that the verification data and model predictions agreed well.[Conclusion] The optimized parameters for the chemical struvite precipitation used to treat swine wastewater with central composite experimental design and response surface method are scientific,rational and efficient." @default.
- W2357202261 created "2016-06-24" @default.
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- W2357202261 date "2012-01-01" @default.
- W2357202261 modified "2023-09-27" @default.
- W2357202261 title "Swine Wastewater Treatment with Struvite Precipitation Technology" @default.
- W2357202261 hasPublicationYear "2012" @default.
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