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008 030411s2002 th uu m rtt 00| a1eng d
035 _a.b11880247
099 9 _aAIT Thesis no. EV-02-6
100 0 _aDang Ngoc Hanh
245 1 0 _aBioremediation of sediments from intensive aquaculture shrimp farms by using calcium peroxide
260 _aBangkok :
_bAsian Institute of Technology,
_c2002
300 _a104 leaves :
_bill.
490 1 _aThesis ;
_vno. EV-02-6
502 _aThesis (M.Eng.) - Asian Institute of Technology, 2002
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. School of Environment, Resources and Development
520 _aShrimp 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.
650 0 _aBioremediation
650 0 _aMarine sediments
700 1 _aAnnachhatre, Ajit P.,
_eChairperson
700 1 _aNguyen Thi Kim Oanh,
_eExamination Committee
700 1 _aTrankler, Josef,
_eExamination Committee
710 2 _aSwedish International Development Cooperation Agency (Sida),
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tThesis;
_vno. EV-02-6
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B07586
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