Optimization of Ammonia Removal from Aqueous Solution by Microwave-Assisted Air Stripping

ATA O. N., KANCA A., DEMİR Z., YİĞİT V.

WATER AIR AND SOIL POLLUTION, cilt.228, sa.11, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 228 Sayı: 11
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1007/s11270-017-3629-5
  • Dergi Adı: WATER AIR AND SOIL POLLUTION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Ammonia removal, Microwave radiation, Air stripping, Optimization, Taguchi method, MASS-TRANSFER COEFFICIENT, JET LOOP REACTOR, WASTE-WATER, ANAEROBIC-DIGESTION, PRETREATMENT, PARAMETERS, TAGUCHI, SOIL
  • Atatürk Üniversitesi Adresli: Evet

Özet

In this study, the optimum conditions for the ammonia removal from aqueous solution by microwave-assisted air stripping have been investigated at pH 11. Ammonia solution with five different initial ammonia concentrations was prepared synthetically. The Taguchi method was applied to optimize the ammonia removal conditions. Initial ammonia concentration, air flow rate, temperature, stirring speed, microwave radiation power, and radiation time were defined as the optimization parameters. Experiments were carried out at five different levels for each operational parameter. The results of the experiments revealed that 1800 ppm of initial ammonia concentration, 7.5 L min(-1) of air flow rate, 60 degrees C of temperature, 500 rpm of stirring speed, and 500 W of microwave radiation power for 180 min. of microwave radiation time are optimum conditions for complete ammonia removal. In addition to present experimental data, the optimum operational conditions predicted by the balanced characteristics of orthogonal array were confirmed experimentally. Finally, the effect of optimization parameters was discussed in detail.