Abstract: Proposed is a method of monitoring odor-causing substances in flue gas, which comprises: providing a flue gas containing one or more odor-causing substances; introducing the flue gas into an odor removal unit; producing a gas-phase stream; dissolving a portion of the gas-phase stream in a solvent to produce a liquid-phase stream; and measuring an absorbance of the liquid-phase stream to identify the odor-causing substances.

Abstract: Disclosed is a system for measuring mass transfer in a membrane and solutions. The system includes: a membrane module 10 including a feed solution reservoir 11 accommodating a feed solution f, a draw solution reservoir 13 accommodating a draw solution d whose osmotic concentration is higher than that of the feed solution f, and a holder 15 supporting a semipermeable membrane m arranged between the feed solution reservoir 11 and the draw solution reservoir 13 and whose performance is to be measured; a feed solution storage tank 20 storing the feed solution f; and a feed solution supply pump 30 supplying the feed solution f from the feed solution storage tank 20 to the feed solution reservoir 11 at a fixed flow rate corresponding to a water flux WF across the membrane m such that the water flux WF is maintained constant.

Abstract: Provided is a wastewater treatment method including measuring a chemical oxygen demand (COD) of wastewater containing organic matter in real time, calculating the amount of ozone associated with a concentration of the organic matter using the measured COD value, and controlling a production of ozone of an ozone generator based on the calculated amount of ozone. The present invention provides a wastewater treatment method and system for adjusting the production of ozone used as an oxidizing agent for decomposing organic matter in wastewater in association with a load of organic matter in wastewater to be oxidized.

Abstract: Disclosed is a system for measuring mass transfer in a membrane and solutions. The system includes: a membrane module 10 including a feed solution reservoir 11 accommodating a feed solution f, a draw solution reservoir 13 accommodating a draw solution d whose osmotic concentration is higher than that of the feed solution f, and a holder 15 supporting a semipermeable membrane m arranged between the feed solution reservoir 11 and the draw solution reservoir 13 and whose performance is to be measured; a feed solution storage tank 20 storing the feed solution f; and a feed solution supply pump 30 supplying the feed solution f from the feed solution storage tank 20 to the feed solution reservoir 11 at a fixed flow rate corresponding to a water flux WF across the membrane m such that the water flux WF is maintained constant.