Application of Natural Clays and Poly Aluminium Chloride (pac) for Wastewater Treatment

Release of wastewater into the environment due to anthropogenic industrial or commercial activities is an emerging challenge for developing countries. This study was conducted to investigate the use of two kinds of available clay coagulants namely Shendi and Singa, and their combination with Poly Aluminium Chloride (PAC) for wastewater treatment. The experiments were designed in Completely Randomized Design (CRD) in three replicates using jar test apparatus for coagulation-flocculation process. The efficiency was calculated by evaluating turbidity, COD, and colour removal. The removal efficiency for PAC and its combined use with Shendi and Singa for turbidity was 96.2%, 94.8%, and 95.7%, for COD was 70.7%, 63.2%, and 61.1% and for colour removal was 82.1%, 78.1% and 80.7% respectively. While the efficiency of sole use of Shendi and Singa for turbidity was 59.2% and 27.9%, for COD was 26.3% and 28.1% and for colour was 26.3% and 10.3% respectively.