In-Situ Nutrient Removal From Clarias gariepinus Hatchery by Vegetable on Floating Bed Coupled With Attached Growth Media
Abstract
Aquaponics is a method of combining aquaculture and hydroponics. Aquaculture farming generates both solid and liquid waste, which comes from faeces and leftover fish feed. The accumulation of waste can lead to a deterioration in water quality, which affects the physiological processes, behaviour, growth, and mortality of fish. Thus, this study was designed to measure the water quality of the aquaponic system incorporating Ipomoea Aquatica, also known as the water spinach and Clarias Gariepinus, commercially known as the African Catfish and to observe the performance of the hybrid attached growth media on the system. The plant component was isolated from the fish rearing operation so that nutrient removal could be evaluated independently. The attached growth media were placed together in the second tank with the plant. The results obtained from the experimental data showed that the aquaponics recirculating system was able to sustain the dissolved oxygen (DO) at the average value of 6.1 mg/L, average ammonia nitrogen reading of 0.14 mg/L and pH value within 7.15 and 7.19 for inlet and outlet point, respectively. It was found that all nutrient removal in the aquaponic system and water quality were maintained within the acceptable and safe limits for the growth and survival of fish. Therefore, this study has given substantial evidence to support the claim that the aquaponics system is efficient in producing catfish and water spinach.
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