Recovering Ammonium-Nitrogen and Phosphorus through Struvite from Anaerobic Digested Effluent of Poultry Wastewater: Effects of Reagent Ratio and pH

Fermentation wastewater generated from livestock and poultry breeding contains high strength of ammonium-nitrogen and phosphorus, which has the huge nutrient recovery value. To recover nitrogen and phosphorus from the fermentation wastewater, struvite precipitate is a promising option. This paper focused on the ratios of reagent adding and pH optimizing during the ammonium and phosphate recycling through struvite precipitate. Using MgCl•6H2O and NaHPO4•12H2O as precipitants, the optimum conditions were discussed in the paper. The results indicated that during a reaction time of 30min and a mixed speed of 100r/min , the ammonium and phosphate were removed by 89% and 88.7%, respectively at pH 10.5 and a molar ratio of Mg:N:P=1.2:1:1. In addition, it could reduce the organic matter content with a COD(Chemical Oxygen Demand ) removal efficiency of 36.2%. The recovered struvite had been suggested to display excellent fertilizer qualities, and also could be recycled and reused as a resource of nitrogen and phosphorus.

[1]  E. Lipczynska-Kochany,et al.  Utilization of landfill leachate parameters for pretreatment by Fenton reaction and struvite precipitation--a comparative study. , 2009, Journal of hazardous materials.

[2]  Daekeun Kim,et al.  Application of struvite precipitation in treating ammonium nitrogen from semiconductor wastewater. , 2008, Journal of hazardous materials.

[3]  P. A. Schneider,et al.  An approach of estimating struvite growth kinetic incorporating thermodynamic and solution chemistry, kinetic and process description , 2008 .

[4]  Donald S. Mavinic,et al.  Nucleation and growth kinetics of struvite in a fluidized bed reactor , 2008 .

[5]  M. Kim,et al.  Enhancing struvite precipitation potential for ammonia nitrogen removal in municipal landfill leachate. , 2007, Journal of hazardous materials.

[6]  D. R. Raman,et al.  Using a chemical equilibrium model to predict amendments required to precipitate phosphorus as struvite in liquid swine manure. , 2007, Water research.

[7]  Xu Jun.  Experimental Research on the Treatment for High Concentration of Ammonia Nitrogen Wastewater by MAP , 2006 .

[8]  Huang Zhongmai.  Ammonia Nitrogen Removing in Piggery Wastewater by Chemical Precipitation , 2005 .

[9]  A. K. Sarkar,et al.  Characterization of soil-fertilizer P reaction products and their evaluation as sources of P for gram (Cicer arietinum L.) , 2004, Nutrient Cycling in Agroecosystems.

[10]  Nathan O Nelson,et al.  Struvite precipitation in anaerobic swine lagoon liquid: effect of pH and Mg:P ratio and determination of rate constant. , 2003, Bioresource technology.

[11]  Qingjian Zhao,et al.  Recovery of ammonium-nitrogen from landfill leachate as a multi-nutrient fertilizer , 2003 .

[12]  S. Parsons,et al.  Struvite formation, control and recovery. , 2002, Water research.

[13]  P. Battistoni,et al.  P removal from anaerobic supernatants by struvite crystallization: long term validation and process modelling. , 2002, Water research.

[14]  E. V. Münch,et al.  Controlled struvite crystallisation for removing phosphorus from anaerobic digester sidestreams. , 2001, Water research.

[15]  Petros G. Koutsoukos,et al.  Spontaneous precipitation of struvite from aqueous solutions , 2000 .

[16]  R. D. Schuiling,et al.  Recovery of struvite from calf manure , 1999 .

[17]  Edward D. Schroeder,et al.  Predicting struvite formation in digestion , 1998 .

[18]  I. Goto.  Phosphorus recovery from sewage treatment plants.Use technology of phosphorus recovered from sewerage facilities.Utilization as phosphate fertilizer. , 1998 .

[19]  G. H. Nancollas,et al.  Crystal growth of calcium phosphates in the presence of magnesium ions , 1985 .