title: Operator decision support system for integrated wastewater management including wastewater treatment plants and receiving water bodies.
abstract: An operator decision support system (ODSS) is proposed to support operators of wastewater treatment plants (WWTPs) in making appropriate decisions. This system accounts for water quality (WQ) variations in WWTP influent and effluent and in the receiving water body (RWB). The proposed system is comprised of two diagnosis modules, three prediction modules, and a scenario-based supporting module (SSM). In the diagnosis modules, the WQs of the influent and effluent WWTP and of the RWB are assessed via multivariate analysis. Three prediction modules based on the k-nearest neighbors (k-NN) method, activated sludge model no. 2d (ASM2d) model, and QUAL2E model are used to forecast WQs for 3 days in advance. To compare various operating alternatives, SSM is applied to test various predetermined operating conditions in terms of overall oxygen transfer coefficient (Kla), waste sludge flow rate (Qw), return sludge flow rate (Qr), and internal recycle flow rate (Qir). In the case of unacceptable total phosphorus (TP), SSM provides appropriate information for the chemical treatment. The constructed ODSS was tested using data collected from Geumho River, which was the RWB, and S WWTP in Daegu City, South Korea. The results demonstrate the capability of the proposed ODSS to provide WWTP operators with more objective qualitative and quantitative assessments of WWTP and RWB WQs. Moreover, the current study shows that ODSS, using data collected from the study area, can be used to identify operational alternatives through SSM at an integrated urban wastewater management level.
authors.affiliation: Department of Civil and Environmental Engineering, Pusan National University, Busan, 609-735, Republic of Korea.
authors.forename: Minsoo
authors.initials: M
authors.lastname: Kim
authors.affiliation: Department of Environmental Engineering, Catholic University of Pusan, Busan, 609-757, Republic of Korea.
authors.forename: Yejin
authors.initials: Y
authors.lastname: Kim
authors.affiliation: EnvironSoft Co., Ltd, Pusan National University, #511 Industry-University Co., Bld., Busan, 609-735, Republic of Korea.
authors.forename: Hyosoo
authors.initials: H
authors.lastname: Kim
authors.affiliation: Department of Civil and Environmental Engineering, Pusan National University, Busan, 609-735, Republic of Korea.
authors.forename: Wenhua
authors.initials: W
authors.lastname: Piao
authors.affiliation: Department of Civil and Environmental Engineering, Pusan National University, Busan, 609-735, Republic of Korea. cwkim@pusan.ac.kr.
authors.forename: Changwon
authors.initials: C
authors.lastname: Kim
mesh_terms: D002947:Cities; D003658:Decision Making, Computer-Assisted; D016002:Discriminant Analysis; D056910:Republic of Korea; D045483:Rivers; D012722:Sewage / Q000032:analysis; D012984:Software; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*; D060753:Water Quality
chemical_list: D012722:Sewage; D014874:Water Pollutants, Chemical
keywords: Decision support system (DSS); Diagnosis; Integrated wastewater management; Mathematical modeling; Multivariate analysis; Receiving water body (RWB)