Abstract: An operation support device includes a computation unit that: calculates cost of separation treatment that depends on deterioration of a separation membrane using a cleaning efficiency model expressing deterioration of the separation membrane relative to the number of cleaning events, the separation membrane being configured to remove removal target from sewage; calculates operation cost using the cost of separation treatment, cleaning cost for one cleaning event for the separation membrane, and replacement cost for one replacement event for the separation membrane; determines, based on the operation cost, a first reference value used for determining whether to clean the separation membrane and a second reference value used for determining whether to replace the separation membrane; and calculates cleaning schedule and replacement schedule for the separation membrane using the first reference value and the second reference value determined.

Abstract: A water treatment control system includes an aerobic tank in which aerobic treatment is carried out, an aerobic tank aeration device that aerates to-be-treated water in the aerobic tank, a membrane filtration tank including a separation membrane that filters the to-be-treated water treated in the aerobic tank, a membrane filtration tank measurement instrument that measures the ammonia concentration of the to-be-treated water in the membrane filtration tank, as a membrane filtration tank ammonia concentration measurement value, and an aerobic tank aeration air volume calculation device that sets the aerobic tank aeration air volume of the aerobic tank aeration device on the basis of the membrane filtration tank ammonia concentration measurement value.

Abstract: A water treatment plant that performs water treatment using a water treatment facility includes: a sensor that repeatedly detects a water treatment environment of the water treatment facility to output time-series detection data; and a processor. The processor causes an arithmetic circuitry to execute a computation related to control of the water treatment facility using the time-series detection data as input data for a calculation model generated by machine learning.

Abstract: An operation support device includes a computation unit that: calculates cost of separation treatment that depends on deterioration of a separation membrane using a cleaning efficiency model expressing deterioration of the separation membrane relative to the number of cleaning events, the separation membrane being configured to remove removal target from sewage; calculates operation cost using the cost of separation treatment, cleaning cost for one cleaning event for the separation membrane, and replacement cost for one replacement event for the separation membrane; determines, based on the operation cost, a first reference value used for determining whether to clean the separation membrane and a second reference value used for determining whether to replace the separation membrane; and calculates cleaning schedule and replacement schedule for the separation membrane using the first reference value and the second reference value determined.

Abstract: A water treatment control system includes an aerobic tank in which aerobic treatment is carried out, an aerobic tank aeration device that aerates to-be-treated water in the aerobic tank, a membrane filtration tank including a separation membrane that filters the to-be-treated water treated in the aerobic tank, a membrane filtration tank measurement instrument that measures the ammonia concentration of the to-be-treated water in the membrane filtration tank, as a membrane filtration tank ammonia concentration measurement value, and an aerobic tank aeration air volume calculation device that sets the aerobic tank aeration air volume of the aerobic tank aeration device on the basis of the membrane filtration tank ammonia concentration measurement value.

Abstract: The invention relates to an improvement in the so-called flip-chip method for electrically connecting bonding pads of a semiconductor device, e.g., IC chips, and electrodes of a circuit board. In place of the conventional bumps formed of a solder alloy on the bonding pads, the bonding pads in the invention are formed of a material having electric conductivity and rubbery elasticity so that the reliability of the electric connection can greatly be improved.