TAILIEUCHUNG - Estimationof biochemical oxygen demand based on dissolved organic carbon, UV absorptionand fluorescence measurements

This study was performed to develop software sensorsto predict the BOD5 of river water and wastewater. The software sensors were based on the multiple-regression analysis using the dissolved organic carbon(DOC) concentration, UV light absorbance at 254nm and synchronous fluorescence spectra. River water samples and wastewater treatment plant (WWTP)effluents were collected at 1-hour interval to evaluatethe feasibility of the software sensors. | Journal of chemistry Estimation of biochemical oxygen demand based on dissolved organic carbon UV absorption and fluorescence measurements. Jihyun Kwak1 Bumju Khang1 Eunhee Kim1 Hyunook Kim2 1 Centennial Technology Co. 2University of Seoul Dept. of Environmental Engineering Correspondence should be addressed to Hyunook Kim h_kim@ Abstract Determination of 5-d biochemical oxygen demand BOD5 is most commonly practiced test to assess the water quality of surface waters and the waste loading. However BOD5 is not a good parameter for the control of water or wastewater treatment processes because of its long test period. It is very difficult to produce consistent and reliable BOD5 results without using careful laboratory quality control practices. This study was performed to develop software sensors to predict the BOD5 of river water and wastewater. The software sensors were based on the multiple-regression analysis using the dissolved organic carbon DOC concentration UV light absorbance at 254nm and synchronous fluorescence spectra. River water samples and wastewater treatment plant WWTP effluents were collected at 1-hour interval to evaluate the feasibility of the software sensors. In short the software sensors developed in this study could well predict the BOD5 of river water r and for the WWTP effluent r . Keywords Biochemical oxygen demand Dissolved organic carbon Multiple regression Real-time monitoring Software sensors Synchronous fluorescence spectrum Ultraviolet absorbance. 1. Introduction The determination of 5-d biochemical oxygen demand BOD5 is the standardized experimental procedure to determine the relative oxygen requirements for aqueous microbes to consume organic materials in wastewaters wastewater treatment plant WWTP effluent or natural waters 1 . BOD5 has been used as an indicator for the amount of organic pollutants in most aquatic systems especially a good indicator for biodegradable organic compounds 2 . Due to the 5-d test .

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