Factors Affecting Settleability of Reactants in Recovery of Nitrogen, Phosphorus, and Potassium from Swine Wastewater

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Other Title
  • 養豚廃水からのN、P、K 回収における反応物の沈降性に影響を与える因子
Published
2024-10-23
Resource Type
departmental bulletin paper
DOI
  • 10.34481/0002000812
Publisher
Faculty of Engineering, University of Miyazaki

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Description

The purpose of this study was to determine factors affecting the settleability of reactants in the recovery of nitrogen, phosphorus, and potassium from swine wastewater using batch reactor. The settling velocity was increased with increase in mixing rate and mixing time and kept constant after mixing time of 2 hours. The effect of GT on settling velocity was negligible. The settling velocity reached maximum of 0.75cm/min at GT of 2.7×105, mixing rate 50rpm and mixing time of 2hours. Phosphorus recovery rate was 100% under any mixing conditions. Nitrogen recovery rate was decreased with increase in mixing time. Potassium recovery rate and average of nitrogen and potassium recovery rate were decreased with increase in GT. At the highest setting velocity, potassium, nitrogen and average recovery rates of nitrogen and potassium were 95%, 84%, and 90%, respectively.

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