Physicochemical quality of oily wastewater from automotive workshop in Kota Bharu, Kelantan Malaysia

Increase in the number of motor vehicle workshops around Kota Bharu has resulted in water pollution problems occur in this area. To prove this hypothesis is correct, a study was conducted where oily wastewater samples were collected from three different automotive workshops in Kota Bharu area. All the three workshops were identified as workshop K, P and T. The sampling was performed three times which were in February 2010, May 2010 and November 2011. The collected samples were analyzed for pH (4.24 - 7.57), temperature (27.2 - 29.8 ℃), biochemical oxygen demand (57.8 - 318.2 mg/L), chemical oxygen demand (137 - 9881 mg/L)), dissolved oxygen (0.15 - 9.42 mg/L)), and oil and grease (14.2 - 90,500 mg/L). The lowest dissolved oxygen was recorded in May 2010 at automotive workshops K. Meanwhile, the highest biochemical oxygen demand and chemical oxygen demand were recorded in February 2010 at automotive workshop T (318.2 ± 1.89 mg/L) and in May 2010 at automotive workshops P (9881 ± 7.46 mg/L) respectively. The results showed that, all the parameters excepted pH and temperature were high and exceeded permissible level (Standard B) listed in the Third Scheduled, Environmental Quality (Sewage and Industrial Effluents) Regulations, 1979 of Environmental Quality Act, 1974

Physicochemical Quality of Oily Wastewater from Automotive Workshop in

Abstract: Increase in the number of motor vehicle workshops around Kota Bharu has resulted in water pollution problems occur in this area. To prove this hypothesis is correct, a study was conducted where oily wastewater samples were collected from three different automotive workshops in Kota Bharu area. All the three workshops were identified as workshop K, P and T. The sampling was performed three times which were in February 2010, May 2010 and November 2011. The collected samples were analyzed for pH (4.24 -7.57), temperature (27.2 -29.8 o C), biochemical oxygen demand (57.8 -318.2 mg/L), chemical oxygen demand (137 -9881 mg/L)), dissolved oxygen (0.15 -9.42 mg/L)), and oil and grease (14.2 -90,500 mg/L). The lowest dissolved oxygen was recorded in May 2010 at automotive workshops K. Meanwhile, the highest biochemical oxygen demand and chemical oxygen demand were recorded in February 2010 at automotive workshop T (318.2 ± 1.89 mg/L) and in May 2010 at automotive workshops P (9881 ± 7.46 mg/L) respectively. The results showed that, all the parameters excepted pH and temperature were high and exceeded permissible level (Standard B) listed in the Third Scheduled, Environmental Quality (Sewage and Industrial Effluents) Regulations, 1979 of Environmental Quality Act, 197

Potential of Chromolaena odorata and Indigenous Bacterial Consortium for Oily Wastewater Treatment

This study was carried out to investigate the possibility of using Chromolaena odorata as absorbent and to ascertain as to whether indigenous bacteria has the potential to degrade hydrocarbon from oily wastewater and thereby reducing its toxicity and other negative impacts to the environment particularly on aquatic life. The potential of Chromolaena odorata and indigenous bacteria to remove oil from wastewater was evaluated by measuring total suspended solid (TSS) concentration. The result shows that, about 55% of oil substances were absorbed or removed after 4 hours of Chromolaena odorata application with the optimum dosage of 4mg/L. Growth percentage of bacterial consortium and single pure strain on medium containing oily wastewater was studied. It was found that bacterial consortium, the mixture of Bacillus cereus (KA) and Acinetobacter (TB) shows higher growth among other bacterial consortium and single pure cultures and this consortium was used for further analysis. In addition, the results have shown that, bacterial consortium (KA+TB) exhibited high efficiency to remove TSS at the optimum dosage of 1 mg/L. Absorption and biodegradation rate was increased after being treated with Chromolaena odorata and bacterial consortium mixture. The mixture of Chromolaena odorata powder and bacterial consortium in 4:1 ratio was obtained to significantly removed TSS by 75% in 24 hours