Associate Professor

Research Fields, Keywords

Environmental Engineering

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E-mail address

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Graduating School 【 display / non-display


    Hokkaido University   Faculty of Engineering   Department of Sanitary Engineering   Graduated

Graduate School 【 display / non-display


    Hokkaido University  Graduate School, Division of Engineering  Division of Sanitary Engineering  Master's Course  Completed

Degree 【 display / non-display

  • Hokkaido University -  Doctor (Engineering)


Papers 【 display / non-display

  • Simultaneous Recovery of Ammonium, Phosphorus and Potassium by Crystallization from Swine Wastewater

    Dote Yutaka, Sekito Tomoo

    Journal of the Japan Society of Material Cycles and Waste Management   28   152 - 159   2017

    Joint Work

     View Summary

    In order to determine the optimum conditions for simultaneously recovering ammonia, phosphate and potassium as magnesium ammonium phosphate (MAP) and magnesium potassium phosphate (MPP) by crystallization from swine wastewater, a recovery experiment was carried out using the primary treatment water of actual swine wastewater. Under all conditions, the recovery efficiency of nitrogen was over 95 %. Recovery efficiencies of 80 % and 99 %, respectively, were reached for potassium and phosphate. Considering the maximum recovery efficiency of potassium and the remaining concentration of phosphate, which must be less than 16 mg/L according to the Japanese government, it was found that the optimum conditions were a pH of 9, P/(N+K) of 1.5, and Mg/P of 1.35 in molar ratio. Under these conditions, the recovery efficiency of potassium and the remaining concentration of phosphate were 45 % and 15 mg/L, respectively. The remaining concentrations of nitrogen, phosphate, potassium and magnesium could be predicted by the solubility products of the MAP, MPP and magnesium phosphate obtained in this study. When the discharge standard for phosphorus is applied, P/(N+K) and Mg/P should be determined so that the predicted remaining phosphorus concentration is less than 8 mg/L, which is half the discharge standard for phosphorus.

    DOI CiNii

  • Effect of pH, temperature and cation on cesium leaching from bottom ash

    Yutaka Dote, Tomoo Sekito, Takayuki Shimaoka

    Proceedings of ICLRS2016     49 - 50   2016.06

    Joint Work

  • Factors Influencing the Resource Separation Behavior by the Waste Bank System in Malang City

    Matsuyama Ayumi, Sekito Tomoo, Meidiana Christia, Prayogo Tri Budi ,Dote Yutaka

    宮崎大学工学部紀要   44   161 - 166   2015.07

    Joint Work

  • Removal of ammonia from aqueous solution for swine wastewater with swine manure compost-based char

    Dote Y, Sekito T, Ueda K., Sakamoto R., Suzuki T., Sano, S.

    Water Practice and Technology   10   409414   2015.06  [Refereed]

    Joint Work

  • Variation and correlation of content and leachability of hazardous metals in MSW molten slag

    T. Sekito, Y. Dote, K. Onoue, H. Sakanakura, and K. Nakamura

    Environmental Monitoring and Assessment   187   4193   2015.01  [Refereed]

    Joint Work

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Presentations 【 display / non-display

  • The effect of household coal ash on solid waste degradation in a lab-scale landfill reactor with leachate recirculation: A case study of Ulaanbaatar, Mongolia

    Batkhuyag ENKH UCHRAL, Tomoo SEKITO, Yutaka DOTE, Tuuguu ENKHDUL

    平成29年度 土木学会西部支部研究発表会  2018.03  -  2018.03 


    Dewi Indraswati, Tomoo SEKITO, Yutaka DOTE, Iwan Pratoyo Kusumantoro

    平成29年度 土木学会西部支部研究発表会  2018.03  -  2018.03 

  • Characteristics of Household Waste and Coal Ash in Ulaanbaatar, Mongolia

    Batkhuyag Enkh Uchral , Sekito Tomoo , Tuuguu Enkhdul , Dote Yutaka

    廃棄物資源循環学会研究発表会講演集  2016.09  -  2016.09 

  • Current Solid Waste Management and Waste Composition Survey in Gili Trawangan, Indonesia

    Radyus Ramli Hindarman, Tomoo SEKITO, Yutaka DOTE, Budi KAMULYAN

    平成27年度 土木学会西部支部研究発表会  2016.03  -  2016.03  土木学会西部支部

  • Community-Based Waste Management in Magelang Municipality, Indonesia

    Bambang JATMIKA, Tomoo SEKITO, Yutaka DOTE, Leksono Probo SUBANU

    平成27年度 土木学会西部支部研究発表会  2016.03  -  2016.03  土木学会西部支部

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