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하수처리장 실시간 유입수 COD 추정을 위한 부유물질(SS), 전기전도도(EC) 및 OUR의 활용성에 관한 연구
서인석 ( In Seok Seo ),김연권 ( Yeon Kwon Kim ),김홍석 ( Hong Suck Kim ),김지연 ( Ji Yeon Kim ) 한국수처리학회 2013 한국수처리학회지 Vol.21 No.6
Recently, water quality of effluent in sewage treatment plant has been monitored in real time by TMS(Tele-Monitoring System). Therefore, early detection of sudden fluctuation of influent concentration in STP has taken on greater importance. For this reason, some researcher studied on the application of simplified mathematical model in operation of sewage treatment plant. However, due to complexity of various parameter application and fractionation of influent COD used in mathematical model, therefore, there are limit still in application. In this research, suspended solids, conductivity and OUR(oxygen uptake rate) was evaluated to develop on-line influent COD monitoring methods. Theoretically, suspended solids, conductivity and OUR are related to particulate, ionic and biodegradable COD, respectively. In evaluation of co-relationship, SS, EC and OUR have a good co-relationship in particulate, ionic soluble COD(acetate, R2=1) and RBCOD, respectively, whereas EC have no response to nonionic soluble COD(glucose, R2=0.37). Therefore, combination of SS and OUR was more efficient in COD concentration prediction of sewage influent. Influent COD values in real time can be importantly utilized in operation strategy of STP.