Struvite recovery from swine wastewater and its assessment as a fertilizer

This study evaluated the fertilizing value of struvite deposit recovered from swine wastewater in cultivating lettuce. Struvite deposit was compared to complex fertilizer, organic fertilizer and compost to evaluate the fertilizing effect of struvite deposit. Laboratory pot test showed that the struvite deposit better enhanced lettuce growth in comparison to commercial fertilizers. It was revealed that the growth rate of lettuce was simultaneously controlled by phosphorus (P) and magnesium (Mg). Moreover, nutrients such as nitrogen (N), P, K, calcium (Ca) and magnesium (Mg) were abundantly observed in the vegetable tissue of struvite pot. Meanwhile, struvite application led to the lower accumulation of mercury (Hg), lead (Pb), chromium (Cr 6+ ) and nickel (Ni). In addition, no detection of cadmium (Cd), arsenic (As) and nickel (Ni) in the lettuce tissue was observed in struvite application pots. The experimental results proved that the optimum struvite dosage for lettuce cultivation was 0.5 g struvite/kg soil. The column experiments clearly showed that ammonia nitrogen was more slowly released from struvite deposit than from complex fertilizer. Consequently, it was concluded that the struvite deposits recovered from swine wastewater were effective as a multi-nutrient fertilizer for lettuce cultivation.

[1]  T. Kim,et al.  Removal of organic matter and nitrogen in swine wastewater using an integrated ion exchange and bioelectrochemical system. , 2015, Bioresource technology.

[2]  YingHao Liu,et al.  Magnesium ammonium phosphate formation, recovery and its application as valuable resources: a review , 2013 .

[3]  Weixiang Wu,et al.  Optimization of struvite crystallization protocol for pretreating the swine wastewater and its impact on subsequent anaerobic biodegradation of pollutants. , 2012, Bioresource technology.

[4]  Chae-Sung Lim,et al.  Evaluation of struvite obtained from semiconductor wastewater as a fertilizer in cultivating Chinese cabbage. , 2012, Journal of hazardous materials.

[5]  Sang-Ill Lee,et al.  Recovery of Struvite Obtained from Semiconductor Wastewater and Reuse as a Slow-Release Fertilizer , 2012 .

[6]  YingHao Liu,et al.  Recovery of nitrogen and phosphorus by struvite crystallization from swine wastewater , 2011 .

[7]  Wei Zhang,et al.  Removal of nutrients from piggery wastewater using struvite precipitation and pyrogenation technology. , 2011, Bioresource technology.

[8]  Wei-dong Sun,et al.  Study on precipitation of struvite and struvite-K crystal in goats during onset of urolithiasis. , 2010, Research in veterinary science.

[9]  Hong-Duck Ryu,et al.  Application of struvite precipitation as a pretreatment in treating swine wastewater , 2010 .

[10]  K. Yetilmezsoy,et al.  Recovery of ammonium nitrogen from the effluent of UASB treating poultry manure wastewater by MAP precipitation as a slow release fertilizer. , 2009, Journal of hazardous materials.

[11]  Eva Nilsson,et al.  Plant availability of nutrients recovered as solids from human urine tested in climate chamber on Triticum aestivum L. , 2007, Bioresource technology.

[12]  G. E. Diwani,et al.  Recovery of ammonia nitrogen from industrial wastewater treatment as struvite slow releasing fertilizer , 2007 .

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

[14]  M C M van Loosdrecht,et al.  Phosphate and potassium recovery from source separated urine through struvite precipitation. , 2007, Water research.

[15]  Y. Bashan,et al.  Recent advances in removing phosphorus from wastewater and its future use as fertilizer (1997-2003). , 2004, Water research.

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

[17]  A. E. Greenberg,et al.  Standard methods for the examination of water and wastewater : supplement to the sixteenth edition , 1988 .