Presence of Heavy Metals in Slaughterhouse Wastewater, A Study at Al Sahafa Abattoir Khartoum, North Sudan

Authors : Khalid Fadol Ahmed, Babiker Karama Abdalla, Sheikh Idris, Kamble Suresh Arjun Rao, Quadri shujat Hussain

Volume/Issue : Volume 5 - 2020, Issue 3 - March

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Heavy metals have been classified under environmental pollutant category because of their toxic effects on both environment and public health. Consumption of plants which irrigated by untreated wastewater or contaminated soils will have effects on animals and human health on the long term. The animals which were going to be slaughtered should consume unpolluted plant and water. The negative environmental impacts of heavy metals on water, air and soil make the significance of this study. This research paper aimed to determine the presence of heavy metals in Al SahafaAbattoir effluents and evaluation of the performance of existing aerobic plant on the removal of the above mentioned dissolved metals. Three composite samples were collected from different sources Drinking water which being utilized for the hole process, Process inlet and Process outlet. All samples were collected, preserved and prepared following APHA Standard methods. The studied parameters were pH and temperature using Hanna HI99163, TDS measured with Hanna HI98302, TSS Method APHA 2540-D, Turbidity using Method APHA 2130 and BOD5 using Method APHA 5210-B. Total coliform count test carried out using Standard method SM 9222D.Other tests for dissolved metals such as Ni, Fe, Cd, pb, Zn and Cu were carried out using the below standard methods APHA 3111 Flame atomic absorption spectrometry.Results from the work carried out reflected that there were no presences of heavy metals in the drinking water. Process inlet found with high iron 12.1ppm and that may be due to blood was not segregated from slaughtering process wastewater.Iron was removed efficiently with the existing process treatment however; the treated effluent did not meet the discharge limits of bothKhartoum state 2008 and Local order 1970 and hence it cannot be discharge as such to river, surface water or public sewer.TDS, pH, temperature and dissolved heavy metals meet the discharge limits while TSS, Turbidity and BOD5 were not. The existing treatment process plant needs some modification to enhance the BOD removal efficiency. The treated effluents generated from Al Sahafa slaughterhouse meet the discharge limits in terms of heavy metals removal while it needs process modification to meet the discharge limits in terms of BOD removal.Further studies to be carried out in order to propose a cost effective treatment unit of AL Sahafaslaughterhouse wastewater.

Keywords : Abattoirs, Treatment, Heavy Metals.


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