DISSOLVED OXYGEN CONCENTRATION CONTROLLER

• Main Authors: KOBAYASHI SHUICHIRO, KUNIMI MASAKI, HONDA KAZUHIRO
• Format: Patent
• Language: English
• Published: 12.12.1989
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; CONTROLLING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PHYSICS; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PURPOSE:To improve energy efficiency by providing a DO control section which detects the DO value in an aeration tank and controls an aeration rate and a DO value monitor section. CONSTITUTION:A DO detector 4 is provided in the aeration tank 1 and the dissolved oxygen concn. value (DO value) in the aeration tank 1 is detected by the same. An air suction section 5 is provided in the tank 1 in order to control the DO value and the aeration air flow sucked form the air suction section 5 is controlled by controlling the value opening degree of an aeration air flow control valve 7 driven by an air flow control section 6. The dissolved oxygen concn. controller 12 has a process input/output section 13, a rate computing section 14, the DO value monitor section 15, a statistic processing section 16, and an energy saving rate pattern selecting section 17. The DO value X detected by the DO detector 4 is monitored and the aeration air flow is controlled. The saving of energy is attained in this way.