03826nas|a2200397 i 4500 20260818100205.0 190499s1998 th uzm rtt 00| a1eng d .b11746932 AIT Thesis no. AS-98-17 Gani, Dewan Osman Environmental and plant nutritional assessment of sewage sludge of Dhaka, Bangladesh Bangkok : Asian Institute of Technology, 1998 88 leaves Thesis ; no. AS-98-17 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, 1998 The present study was conducted with the view to investigate the suitability of Pagla STP sludge as source of nitrogen and phosphorus for crop plants. Emphasis was also given to the heavy metal uptake by the plant from the sewage sludge. To investigate these two pot studies using sludge were carried out with sunflower as the test crop in the premise of Regional Laboratory, Soil Resource Development Institute, Rajshahi, Bangladesh. The dry matter production was considered as the crop yield. Four levels of nitrogen and that for phosphorus were applied and to compare the performance of sludge, trials with mineral fertilizers (urea and TSP) were carried out. A common control treatment with no fe1tilizer was also carried out. Sludge quality was not comparable in terms of it's nutrient content with that of other nations even with Bangkok sludge since it contained low level of nitrogen and phosphorus. However experimental results suggest that the performance of sludge was not bad. Almost same yield of sludge treated plants (as mineral fertilizer treated plants) implies that most of the nitrogen and phosphorus were available to the plants. Zn was the metal of most concern since it was present in high level. No toxic symptom due to uptake of potentially toxic heavy metals was observed which indicates that uptake of metals did not exceed the limits. Though sludge contained very low level of Mn but the uptake for it was the highest of all metals. There was no significant difference in all the metal content of sludge treated plants with that of control. Only Zn uptake of sludge treated plants was significantly different from control and other mineral treatment. Soil test results show that Zn, Mn, Cu and Cr had leached downward to some extent. Statistically significant leaching was observed in case of Zn. Considering all these, it could be concluded that the Pagla STP sludge can be utilized as the fe1tilizer taking into account the total Zn input in the land over a period of time. Sewage sludge as fertilizer Bangladesh Dhaka Hansen, Gunner Kjer, Chairperson Eckhardt, Ing. Heinz, Examination committee Preeda Pakpian, Examination Committee DANIDA, Royal Danish Embassy, Dhaka, Scholarship donor Asian Institute of Technology, Scholarship donor Asian Institute of Technology. Thesis ; no. AS-98-17 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B13212 .b11746932 mnait y 240411 0 990419 m a y 0 mnait mnarc 22 40 Barcode : 30050120695332 CREATED : 2013-06-09 RECORD # : i12740123 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120359137 CREATED : 2016-09-06 RECORD # : i1302761x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 38810 38810 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no. AS-98-17 30050120695332 2026-08-18 10:02:05 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. AS-98-17 30050120359137 2026-08-18 10:02:06 1 2026-08-18 40