Syafiqah Saufie (2017) Development of low-cost aquaponic system using Media-Filled System (MFS), Deep-Water Raft System (DWRS) and Nutrient-Film System (NFS). Masters thesis, Universiti Malaysia Sabah.
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Abstract
Aquaponic system integrates aquaculture with hydroponics by stocking of aquaculture animals with aquatic plants in a closed recirculating system. Obviously, plants grow in a soilless environment, with fish waste supplying the nutrients needed for their growth. The biological filtration carried out by nitrifying bacteria neutralizes the toxic elements that would otherwise produce in the system from nitrogenous waste of stocked animals and render the same of use by the plants. This study utilizes the fundamental elements of this biodynamic system to develop three diversified systems, namely Media-filled system (MFS), Deep-water raft system (DWRS) and Nutrient-film system (NFS), and to examine their production efficiency. Observations were made on growth and survival of cultured Nile tilapia ( Oreochromis niloticus) and green beans ( Phaseolus vulgaris) together with chinese cabbage ( Brassica rapa chinensis) in these systems. The results showed no significant differences (P>0.05) in fish performance in terms of weight gain, specific growth rate and feed conversion ratio and survival rate of nile tilapia in each of the treatment. Interestingly, significant differences (P<0.05) were noticed in biomass gain of green beans and chinese cabbage in different treatments. Nutrients concentrations in these three aquaponics systems ranged from 0.23 ± 0.02 mg/L to 0.29 ± 0.11 and 0.39 ± 0.22 mg/L to 0.61 ± 0.19 mg/L for NHrN and NOrN, respectively. These values showed no significant difference (P<0.05). However, significant differences {P<0.05) were seen in the concentrations of NOrN and PO4- P which were in the range of: 0.89 ± 0.37 mg/L to 1.4 ± 0.39 mg/L (NOrN) and 0.45 ± 0.04 mg/L to 0.57 ± 0.2 mg/L (PO4-P) indicated plants taken up nutrients of NOrN and PO4-P to grow. The result also showed highest production efficiency is in the MFS; approximately 1 kilogram of green beans was produced where no significant difference (P>0.05) detected with DWRS, while, MFS and DWRS do have significant difference (P<0.05) with NFS. For Chinese cabbage productions, the biomass produced within the three systems were not achieved the marketable size. Then, the next experiment was the comparison between combined aquaponic system (MFS+DWRS) and single DWRS carried out to evaluate the growth performances of GIFT (genetically improved farmed tilapia) and tomato (Solanum lycopersicum) plant. It was revealed that the GIFT gained 94 % of body weight whereas height of tomato plant increased by 96.3 % and starting the flowering process (early stage of fruit formation) in the combined aquaponic system. The water quality parameters recorded throughout the study period were within the acceptable range for fish culture. The concentrations of NOrN and PO4 were evidently adequate for plants to grow. The data leave no doubt on the effectiveness of combined aquaponic system compared to single DWRS. As a conclusion, the presence of aquaponic in the aquaculture system did not give any deleterious effect to fish growth performances. Wastewater within the aquaculture system was possible to become main source of nutrient for the plants that grow without the presence of soils. The developed aquaponic sub-systems were not only suitable for integrating system for biomass crop production, but also useful to reused nutrient rich water available in the aquaculture system.
| Item Type: | Thesis (Masters) |
|---|---|
| Keyword: | Aquaponics, Integrated aquaculture, Hydroponics, Media-filled system |
| Subjects: | S Agriculture > SH Aquaculture. Fisheries. Angling > SH1-691 Aquaculture. Fisheries. Angling > SH20.3-191 Aquaculture |
| Department: | INSTITUTE > Borneo Marine Research Institute |
| Depositing User: | DG MASNIAH AHMAD - |
| Date Deposited: | 03 Jul 2025 10:19 |
| Last Modified: | 03 Jul 2025 10:19 |
| URI: | https://eprints.ums.edu.my/id/eprint/44273 |
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