03884nas|a2200421 i 4500 20260817171544.0 030411s2002 th uu m rtt 00| a1eng d .b11880247 AIT Thesis no. EV-02-6 Dang Ngoc Hanh Bioremediation of sediments from intensive aquaculture shrimp farms by using calcium peroxide Bangkok : Asian Institute of Technology, 2002 104 leaves : ill. Thesis ; no. EV-02-6 Thesis (M.Eng.) - Asian Institute of Technology, 2002 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. School of Environment, Resources and Development Shrimp pond sediments contain high Organic Carbon (Organic-C), Organic Nitrogen (Organic-N), and Organic Phosphorus (Organic-P). As a result, appropriate sediment treatment procedure using slow oxygen (02) release agents such as calcium peroxide (Ca02) was developed in this research. Initially, investigations on 0 2 release from Ca02 were carried out at different concentrations of Ca02 in water with and without biomass seeding. The experimental results suggested that the rate of 02 release from Ca02 was high with wastewater and biomass seeding. Up to 97% 02 was released from Ca02 within 10 days. On the other hand, the rate of 0 2 release from Ca02 in distilled water was considerably low due to lack of oxygen demand. Experiments with sediment treatment by Ca02 were carried out separately with and without biomass seeding. In all experiments, the same dry solid content of 269 g/L was maintained. The pH maintained in this experiment was in the range of 6.5 - 8.5 using mono-potassium phosphate (KH2P04). Experiment without biomass seeding with different Ca02 dosage (1.0 and 1.2 times the theoretical requirement) was lasted for 17 days. BOD5 and Organic-N removal up to 95% and 75% were achieved respectively in this period. The experimental results indicated complete organic-P removal within 5-7 days. Experiment with Ca02 dosage and biomass seeding lasted for 14 days. The investigation was carried out with Ca02 dosage (1 time the theoretical requirement) but with different food-to-microorganisms (F/M) ratio between 0.1 and 0.25. BOD5 and Organic-N removal up to 92% and 73% were achieved for F/M ratio 0.1. On the other hand, Organic-P was completely removed within initial 2 days of experiment. This research study suggested that slow oxygen release agents such as Ca02 could be effectively used for treatment of polluted sediments from shrimp ponds. Bioremediation Marine sediments Annachhatre, Ajit P., Chairperson Nguyen Thi Kim Oanh, Examination Committee Trankler, Josef, Examination Committee Swedish International Development Cooperation Agency (Sida), Scholarship donor Asian Institute of Technology. Thesis; no. EV-02-6 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B07586 .b11880247 mnait u 240403 0 030411 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050120710966 CREATED : 2001-12-11 RECORD # : i12321783 LPATRON : 1015247 LCHKIN : 2004-09-23 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 3 TOT RENEW : 0 Barcode : 30050120710958 CREATED : 2001-12-11 RECORD # : i12321795 LPATRON : 1016804 LCHKIN : 2004-01-22 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 4 TOT RENEW : 1 Barcode : 30050160076831 CREATED : 2016-05-24 RECORD # : i12989861 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 12682 12682 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no. EV-02-6 30050120710966 2026-08-17 17:15:44 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no. EV-02-6 30050120710958 2026-08-17 17:15:44 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no. EV-02-6 30050160076831 2026-08-17 17:15:44 2026-08-17 40