03569nam a2200421 4500 20260817173344.0 011298s1987 th r 0000|00eng d .b10151205 AIT Thesis no. EV-87-24 Sapkota, Danda Prasad Comparative study of aquatic macrophytes for wastewater treatment Bangkok : Asian Institute of Technology, 1987 47 p. Thesis ; no. EV-87-24 A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1987 One set of parallel oxidation ponds was used for comparing ·the treatment efficiency of pond system with and without water hyacinth in full-scale study under similar conditions. Experiments were performed from t he last week of October till the last week of January , 1987. Mean COD loadings to t he systems were 106 kg/(ha .d) and 98 kg/(ha.d) for the hyacinth pond and the free pond respectively. During the period of observation effluent concentrations in the hyacinth pond for hundred percent hyacinth coverage were 9 , 20 , 2 and 0 . 36 mg/L for SS, COD, TKN and TP respectively. The corresponding effluent concentrations in the free pond were 45, 94, 5.6 and 1.2 mg/L for SS, COD, TKN and TP respectively. Mean mass of COD, TKN and TP were removed at 78, 76 and 74. 8% respectively in the hyacinth pond system, whereas in the free pond system, mass COD, TKN and TP were removed at 20, 44.4 and 18.30% respectively . At 100 % hyacinth coverage, mass COD, TKN and TP removed, in the hyacinth pond were, at 84, 79.6 and 79.4% respectively. In the free pond system mass COD, TKN and TP were removed at 24, 44. 8 and 22% respectively . Hyacinth pond showed better performance than the free pond in removing SS, COD, TKN and TP from the wastewater . Laboratory experiments were conducted for comparing the efficiency of aquatic plants namely water hyacinth, water lily and salvinia. The influent loading used were 41 and 86 kg COD/ (ha. d) . Results indicated that hyacinth pond system showed the best performance in removing pollutants followed by salvinia and water lil y for t he applied loadings. Sewage Purification Aquatic plants Orth, Hermann M., Chairperson Chongrak Polprasert, Examination Committee I, Fude, Examination Committee The Royal Norwegian Government, Scholarship Donor Asian Institute of Technology. Thesis ; no. EV-87-24 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B19247 .b10151205 mnait x 240411 2 951012 m a x 0 mnait mnait mnarc 20 40 Barcode : 30050003044004 CREATED : 1994-05-16 RECORD # : i10177838 LPATRON : 1024927 LCHKIN : 2014-11-14 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 2 TOT RENEW : 0 Barcode : 30050003044012 CREATED : 1994-05-16 RECORD # : i1017784x LPATRON : 1017687 LCHKIN : 2005-04-12 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 4 TOT RENEW : 15 Barcode : 30050120223713 CREATED : 2016-10-05 RECORD # : i12973282 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 19682 19682 0 0 0 0 MAIN MAIN mnait 2026-08-17 0 AIT Thesis no. EV-87-24 30050003044004 2026-08-17 17:33:44 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 0 AIT Thesis no. EV-87-24 30050003044012 2026-08-17 17:33:44 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no. EV-87-24 30050120223713 2026-08-17 17:33:44 2026-08-17 40