Recovery Of Nitrogen And Phosphorous From Source Separated Urine Using Biochar

Water Supply And Environmental Engineering Project Topics

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Nutrients mainly nitrogen and phosphorous exist in wastewater excessively. If uncontrolled,rnthey lead to eutrophication problem which has adverse impacts on the social, economic andrnecological values of surface water bodies. Urine is a significant contributor of phosphorus andrnnitrogen found in domestic waste water. Therefore, recovery of these nutrients from urinernremoves the excess amount of nutrients and prevents environmental pollution. In additionrnremoval of Phosphorus in wastewater treatment plants is costly and limits its recovery and usernas a resource. Recovery of nutrients from source separated urine would increase the efficiencyrnin nitrogen and phosphorous removal and reuse capacity. The objective of this research was tornexamine different parameters affecting the recovery of nitrogen and phosphorous throughrnadsorption process by using biochar produced from corn cob(CC), coffee husk(CH) and waterrnhyacinth(WH) and determine nutrient recovery efficiencies of each biochar from human urine.rnIn this research, the impacts of different parameters which can affect nutrient recovery fromrnsource separated urine using biochar were examined to get optimal values. The nutrientrnrecovery process was conducted under different pH (3-8), biochar dosage (0.2-1g) and contactrntime (30-150min.) on urines of different storage time (15days, 1 month and 2 month). Thernoptimum working values of pH and contact time were 6 and 60 minutes, respectively. Thernoptimum dosages were 0.4g, 0.6g and 0.8g for 15 days, 1 month and 2 months stored urine.rnHighest NH4rn+rn3—rn-N and PO4rnP recoveries were obtained from urine that had two months of rnstorage time. Therefore, urine with two months storage time was selected as optimal. Underrnthese optimum values, the nitrogen recovery efficiencies of biochars produced from CC, CHrnand WH were 94.13%, 77.99% and 85.78%, respectively. The recovery efficiencies ofrnphosphorous from human urine were 68.60%, 71.14% and 57.72 % using CC, CH and WH,rnrespectively. CC produced biochar was the best compared to CH and WH biochars. Biocharsrnproduced from wastes have good potentials for nutrient recovery from source separatedrnurines. Besides, the use of waste as resource is in line with sustainable waste management andrncontributes to environmental pollution control.

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Recovery Of Nitrogen And Phosphorous From Source Separated Urine Using Biochar

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