Optimization of sewage treatment and fish propagation in pond | |
| Author | Gullaya Wattayakorn |
| Call Number | AIT Thesis no. 976 |
| Subject(s) | Sewage Fish-culture Algae |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science of the Asian Institute of Technology, Bangkok, Thailand. |
| Publisher | Asian Institute of Technology |
| Abstract | Attempts were made to cultivate selected freshwater fish in a wastewater stabilization pond and in fish ponds receiving stabilization pond effluent. Suitable environmental conditions for the culture of fish could be maintained where the effluent was diluted with surface water. In the case where no dilution water was used, excessive growth of algae led to depletion of dissolved oxygen causing to fish mortality. Stabilization pond liquor was found to be too toxic for Carp and Tilapia to survive when the pond was loaded at 224 kg BOD5 /hectare-day. Catfish can survive for some time in this pond but was found to be very sensitive to bacterial infection. The 33% and 50% diluted algal effluent were found to be optimum for the growth of Carp and Tilapia, respectively, in fish ponds. A stocking density of 10 fish/m2 was still too high for fish to reach a marketable size within a reasonable time. Under these conditions, the high production yields of 10,000 and 26,400 kg/hectare-year (8,928 and 23,571 lb/ acre-year) were estimated for Carp and Tilapia, respectively. Economic analysis of the oxidation-fish pond system indicated that the operating costs of waste treatment could be markedly reduced or even turned into a profit for the community involved. This preliminary investigation has shown that it is possible to convert the polluting organic matter in domestic sewage into algal protein and in turn to edible fish protein. |
| Year | 1976 |
| Type | Thesis |
| School | Student Research Before 1980 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Pescod, M.B.; |
| Examination Committee(s) | Samorn Muttamara ;Yang, Yi Ping |
| Scholarship Donor(s) | Asian Institute of Technology ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1976 |