Abstract
This study examined the physicochemical parameters of fish pond water to ascertain if they pose any risk to the environment after disposal. Water samples were collected from metallic, tarpaulin and concrete ponds from Anambra, Imo and Lagos states, Nigeria and analysed for minerals and physicochemical parameters using standard analytical methods. The results obtained were as follows; pH 6.30±0.06 – 6.94±0.01, turbidity 40.00±0.01-315.00±1.73 NTU, TSS 324.00±9.59 – 1346.00±20.53 mg/L, TDS 24.2 ±2.20 – 45.6 ±17.2 mg/L, hardness 18.6±3.9 – 24.3±3.80, phosphate 0.12±0.01 - 0.23±0.01, nitrate 0.42±0.02 – 1.17±0.01, BOD 1.43.33±1.41 – 577.67±2.8, DO 27.67±1.41 – 57.67±0.02, Zn 0.12±0.03-0.92±0.02, Cu 0.18±0.03 – 0.53±0.01, Fe 0.24±0.02 – 0.55±0.02 and Ca 0.19±0.02 – 0.51±0.02. The results varied from one pond to another depending on the residence time of the samples and the nature of the pond. All parameters were within the established limit for effluent disposal except biochemical oxygen demand (BOD)and dissolved oxygen (DO).
 Keywords: Physicochemical parameters, Fish pond, Aquaculture, Freshwater, Fish
Highlights
Aquaculture plays a significant role in food security and adequate nutrition (FAO, 2020)
This study examined the physicochemical parameters of fish pond water to ascertain if they pose any risk to the environment after disposal
Fish pond water is an effluent from agricultural processes (Yoboué et al, 2020; Amankwaah et al, 2014). This is why it is essential that the physicochemical quality and mineral constituents of fish pond water is routinely examined to ensure that it meets set regulatory criteria that pose no harm to the environment after disposal
Summary
Aquaculture plays a significant role in food security and adequate nutrition (FAO, 2020) It supplies fish which is a major and cheaper source of essential protein in human diet. Nigeria has embraced agriculture as one of the economy diversification strategies This has led to the noticeable increase in fish farming with the resultant corresponding increase in the volume of discharged fish pond water from land-based aquafarms. Fish pond water is an effluent from agricultural processes (Yoboué et al, 2020; Amankwaah et al, 2014) This is why it is essential that the physicochemical quality and mineral constituents of fish pond water is routinely examined to ensure that it meets set regulatory criteria that pose no harm to the environment after disposal. The conclusion drawn from the study is expected to aid in sustainable aquaculture management
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