04023nam a2200433 4500 20260817171628.0 011298s1988 th r 0000|00eng d .b10118603 AIT Thesis no. EV-88-3 Sitaramamurty, Bhamidipati BOD5, COD and solids removal in a facultative pond and a water hyacinth pond : a case study Bangkok : Asian Institute of Technology, 1988 68 p. Thesis ; no. EV-88-3 A thesis submitted in partial fulfilment of the requirement for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Sc.) - Asian Institute of Technology, 1988 Experiments were conducted in two stages, namely before increase of load and after increase of load on water hyacinth pond. In the first stage comparison was made between facultative pond performance and water hyacinth pond performance in removing BOD5,COD,SS and TS, where as in the second stage removal efficiency and the effect of high loading on water hyacinth was studied. Experiments were performed from October 1 5, 1 987 to December 9, 1 987 in the first stage and from December 12, 19 87 to February 28, 1 988 in the 2nd stage . The existing set of parallel oxidation ponds which are treating the wastewater from AIT campus were used in t hi s study. Hyacinth pond showed better performance compared to facultative pond even after two years of harvesting. During the period of observation the average effluent concentrations in the water hyacinth pond were 1 2, 38, 7 and 631 mg/L for BOD5, COD, SS and TS respectively, where as the corresponding values in the facultative pond were 1 4, 5 1 , 36 and 667 mg/L respectively. Mean COD loadings to the system were 83 kg/Cha. d)and 78 kg/Cha. d) for water hyacinth and facultative pond respectively. The mean mass of BOD5, COD, SS and TS were re moved at 76, 62, 85 and 26 % respectively in the hyacinth pond , where as in the facultative pond, mass BOD5, COD, SS and TS were removed at 73, 49, 33 and 24 % respectively. In the second stage when the load was 18 1 2 m3/Cha . d) as compared to the first stage load 1002 m3/Cha. d), the effluent BOD5, COD, SS and TS concentrations were 17, 47, 3 and 648 mg/L respectively. Th e mean COD loading in the second stage was 1 50 kg/Cha. d) as compared to 83 kg/( h a. d) in the first stage. The mean mass of BOD5, COD, SS and TS were removed at 76, 6 1, 85 and 35 % respectively in the second stage as compared to 76, 62, 85 and 26 % for BOD5, COD, SS and TS respectively in the first stage . This shows that the water hyacinth performance was quite good even after increase of loading. Sewage lagoons Sewage Purification Biological treatment Hyacinths Orth, Hermann M., Chairperson I, Fude, Examination Committee Samorn Muttamara, Examination Committee The Royal Norwegian Government, Scholarship Donor Asian Institute of Technology. Thesis ; no. EV-88-3 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B18873 .b10118603 mnait x 240411 2 951012 m a x 0 mnait mnait mnarc 20 40 Barcode : 30050003044186 CREATED : 1994-05-16 RECORD # : i10133483 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003044194 CREATED : 1994-05-16 RECORD # : i10133495 LPATRON : 1017687 LCHKIN : 2005-07-03 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 11 TOT RENEW : 11 Barcode : 30050120223622 CREATED : 2016-10-05 RECORD # : i12973397 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 12979 12979 0 0 0 0 MAIN MAIN mnait 2026-08-17 0 AIT Thesis no. EV-88-3 30050003044186 2026-08-17 17:16:28 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 0 AIT Thesis no. EV-88-3 30050003044194 2026-08-17 17:16:28 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no. EV-88-3 30050120223622 2026-08-17 17:16:28 2026-08-17 40