Microbiological and Physicochemical Evaluation of Jakara Canal Wastewater Used for Irrigation in Kano
Municipal wastewater as alternative sources of water for urban agricultural (irrigation) in Kano, was analyzed to determined the coliform and physicochemical parameters. Three sampling units were designed along the canal. Seven (7) samples were collected at each point. Coliform counts were determined by most probable number (MPN) techniques. Total suspended solids (TSS), total dissolved solids (TDS), organic carbon (OC), nitrates (NO3-), ammonium-nitrogen (NH3-), calcium (Ca), magnesium (Mg), potassium (K), sodium (Na), dissolve oxygen (DO), temperature, pH, conductivity and biological oxygen demand (BOD), were all determined by standard methods. Mean fecal coliform count ranged from 64.43 ± 63.20 MPN 100/ml to 216.85 ± 350.16 MPN 100/ml with a significant different (P < 0.05) in the first point as compared to second and third points. Mean conductivity value ranged from 3.33 ± 21 dS/m to 3.44 ± 40 across the canal. There were fluctuations in pH, Temperature, TDS, DO, BOD and Na, values, but within normal range. A remarkable decrease in the mean values for NH3-, NO3-, TSS, K and Mg, was observed. In contrast, the mean values for OC = 87.43 ± 3.78, 89.86 ± 7.80 and 92.43 ±3.91, Ca = 0.38 ± .20, 0.40 ± .13, .40 ± .14 and MPN = 64.4 ± 63.2, 172.1 ± 210.6, 216.9 ± 350.2 for point 1, 2 and 3 respectively, increases as the water moved along. All physicochemical parameters were within FEPA and WHO/FAO acceptable limits, except for conductivity which need to be monitored to avoid salinity.
Coliform, Physicochemical Parameters, Wastewater Quality, Salinity and Urban Agriculture
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