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    • 37. 发明专利
    • Biological wastewater treatment equipment
    • JP5300827B2
    • 2013-09-25
    • JP2010258010
    • 2010-11-18
    • 株式会社東芝
    • 理 山中卓巳 小原理江 大給勝也 山本正城 佐竹
    • C02F3/34C02F3/12
    • Y02W10/15
    • PROBLEM TO BE SOLVED: To provide an optimal biological wastewater treatment apparatus wherein generation of N 2 O gas, performance of removing nitrogen and phosphorus, and a cost are evaluated overall. SOLUTION: The biological wastewater treatment apparatus includes: a biological wastewater treatment part 1 sequentially connecting a primary sedimentation basin 11, an oxygen-free tank 12, an aerobic tank 13, and a final sedimentation basin 14; at least one of control devices of an aeration amount control device 28, a circulation amount control device 29 and a chemical charging amount control device 30; at least one of cost calculation parts, in a cost calculation part 5, of a first cost calculation part 25 for converting an amount of N 2 O generation to a cost, a second cost calculation part 26 for calculating a power charge and a chemical cost, and a third cost calculation part 27 for calculating a wastewater discharge charge based on water quality during releasing the water; and a cost maximization control part 6 for controlling the controlling amount of the control device so as to minimize the cost calculated in real time or at a certain period by the cost calculation part 5. COPYRIGHT: (C)2012,JPO&INPIT