Gani, Dewan Osman creator 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 text series technical report th Bangkok Asian Institute of Technology 1998 continuing eng 88 leaves 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. 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 Sewage sludge as fertilizer Bangladesh Dhaka Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B13212 http://203.159.5.9/ait-thesis/detail.php?q=B13212 190499 20260818100205.0