04007nas a2200421 i 4500 20260818143617.0 090300s1999 th uu m rtt 0| a1eng d .b1177986x AIT Thesis no.UE-98-3 Nguyen Duc Toan An integrative BOD model for municipal wastewater control to maintain water quality in the west lake of Hanoi city Bangkok : Asian Institute of Technology, 1999 99 leaves Thesis ; no. UE-98-3 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science. School of Environment, Resources and Development Thesis (M.Sc.) - Asian Institute of Technology, 1999 West Lake is located within Hanoi City, the capital of Vietnam. However, water quality in the lake has been polluted. More precisely, pollution is P- Mezosaprobe type. The major cause for this has been identified as the direct discharge of wastewater into the Lake. The construction of a BOD model is needed to serve as a tool for water environmental management. The model should incorporate both exogenous and endogenous factors to reflect the effects of climate, waste load, and biological processes in the lake's water body over time, especially for a long-term perspective. A relevant BOD model has been developed based on mass balance equation of BOD, phytoplankton and phosphorus, and calibrated based on available data. The model's emphasis is placed on relationships between water quality in the Lake and BOD content in wastewater to assess the water quality change in terms of seasons and time scales. The model's simulation indicates that water quality of the Lake, with the city's master plan, will be rapidly degraded in the years to come and will reach a level much lower than the water quality standard. Extensive experiments with the model reveal different effects on water quality of different levels of BOD input reduction. If an acceptable long-term water quality is to be achieved, a substantial wastewater pre-treatment at sources (to reduce up to 40% BOD input) is required along with a central treatment plant afterward. The technical and administrative aspects of wastewater control framework as required have been discussed for implementing, by taking into account economic efficiency and suitability criteria as well as socio-economic conditions. Thus, the study aims to identify the close relationship between the water quality management and waste water control by subsuming the cause and effect factors that have been widely recognized, so that water quality can be maintained by controlling discharged wastewater. Biochemical oxygen demand Sewage Purification Nguyen Luong Bach, Chairperson Zimmermann, Willi, Examination Committee Morishita, Hideharu, Examination committee Swiss Agency for Development and Cooperation (SDC), Scholarship donor Asian Institute of Technology. Thesis ; no. UE-98-3 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B12331 .b1177986x mnait u 250221 0 000309 m a u 3 mnait mnait mnarc 20 40 Barcode : 30050120426761 CREATED : 2000-07-03 RECORD # : i12179024 LPATRON : 1021891 LCHKIN : 2011-03-18 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 10 TOT RENEW : 3 Barcode : 30050120426779 CREATED : 2000-07-03 RECORD # : i12179036 LPATRON : 1017764 LCHKIN : 2006-12-07 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 6 TOT RENEW : 0 Barcode : 30050160021191 CREATED : 2016-01-18 RECORD # : i12869302 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 61768 61768 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.UE-98-3 30050120426761 2026-08-18 14:36:17 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.UE-98-3 30050120426779 2026-08-18 14:36:17 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.UE-98-3 30050160021191 2026-08-18 14:36:17 2026-08-18 40