Abstract: Disclosed are polyvinylidene fluoride hollow fiber separation membranes and a preparation method thereof, and more particularly, to polyvinylidene fluoride hollow fiber separation membranes, which may be usefully used not only for water treatment, but also in the sewage treatment field, such as domestic waste water, industrial wastewater, or the like because the polyvinylidene fluoride hollow fiber separation membranes possess excellent pure water permeability and chemical resistance such as alkali resistance, etc.

Abstract: A system and method for controlling treatment of the sewage/waste water. The method includes measuring attributes of inflow water flowing into a sewage/waste water treatment plant, attributes of an internal condition of a reaction tank having a first story and a second story, and fluid present values (PVs) of efficiency attributes of outflow water. The method also includes collecting data of the measured fluid PVs and operation-processing the data to convert the data into physical quantity data. The method also includes obtaining each optimum set point (SP) of each dissolved oxygen (DO) and solids retention time (SRT) of the first story and the second story of an exhalation tank by comparing PVs of the measured attributes using a neural network control program with a back-propagation algorithm.

Abstract: A system and method for controlling treatment of the sewage/waste water. The method includes measuring attributes of inflow water flowing into a sewage/waste water treatment plant, attributes of an internal condition of a reaction tank having a first story and a second story, and fluid present values (PVs) of efficiency attributes of outflow water. The method also includes collecting data of the measured fluid PVs and operation-processing the data to convert the data into physical quantity data. The method also includes obtaining each optimum set point (SP) of each dissolved oxygen (DO) and solids retention time (SRT) of the first story and the second story of an exhalation tank by comparing PVs of the measured attributes using a neural network control program with a back-propagation algorithm.