This study assessed the fertilizing value of struvite deposit recovered from swine wastewater in cultivating Chinese cabbage. Struvite deposit was compared with commercial fertilizers: complex, organic and compost to evaluate the fertilizing effect of struvite deposit. Laboratory pot test obviously presented that the struvite deposit more facilitated the growth of Chinese cabbage than organic and compost fertilizers even though complex fertilizer was the most effective in growing Chinese cabbage. It was revealed that the growth rate of Chinese cabbage was simultaneously controlled by phosphorus (P) and potassium (K). Also, the nutrients such as nitrogen (N), P, K, calcium (Ca) and magnesium (Mg) were abundantly observed in the vegetable tissue of struvite pot. Specifically, P was the most abundant component in the vegetable tissue of struvite pot. Meanwhile, the utilization of struvite as a fertilizer led to the lower accumulation of chromium (Cr6+) than other pots, except for compost fertilizer pots, and no detection of cadmium (Cd), arsenic (As) and nickel (Ni) in the Chinese cabbage. The experimental results proved that the optimum struvite dosage for the cultivation of Chinese cabbage was 2.0 g struvite/kg soil. On the basis of these findings, it was concluded that the struvite deposits recovered from swine wastewater were effective as a multi-nutrient fertilizer for Chinese cabbage cultivation.

Abstract
 1. Introduction
 2. Materials and methods
  2.1. Struvite synthesis
  2.2. Pot tests: evaluation of struvite deposit as afertilizer
  2.3. Pot tests: determination of optimum struvitedosage
  2.4. Analytical procedures
 3. Results and discussion
  3.1. Characteristics of struvite deposit
  3.2. Fertility evaluation of struvite deposit
  3.3. Heavy metals in vegetable tissue
  3.4. Nutrients in vegetable tissue
  3.5. Effect of struvite dosage on Chinese cabbagecultivation
 4. Conclusions
 REFERENCE

• Hong-Duck Ryu(Watershed and Total Load Management Division, National Institute of Environmental Research)
• Han-Seul Lee(Department of Environmental Engineering, Chungbuk National University)
• Sang-Ill Lee(Department of Environmental Engineering, Chungbuk National University) Corresponding author