Bioremediation of sediments from intensive aquaculture shrimp farms by using calcium peroxide | |
| Author | Dang Ngoc Hanh |
| Call Number | AIT Thesis no. EV-02-6 |
| Subject(s) | Bioremediation Marine sediments |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. EV-02-6 |
| Abstract | 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. |
| Year | 2002 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis; no. EV-02-6 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Annachhatre, Ajit P. |
| Examination Committee(s) | Oanh, N. T. Kim ;Traenkler, Josef |
| Scholarship Donor(s) | Swedish International Development Cooperation Agency (Sida) |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2002 |