Universiti Teknologi Malaysia Institutional Repository

Application of ez-enzyme in bioremediation of oily sludge

Ho, Jenny and Mohd. Yusoff, Mohd. Rashid (2008) Application of ez-enzyme in bioremediation of oily sludge. Jurnal Teknologi (48F). pp. 21-32. ISSN 0127-9696

[img] PDF (Full Text) - Published Version
[img] HTML


Sludge farming is commonly used in petroleum refinery as a method of treatment for oily waste containing degradable constituents into materials that are not hazardous to human health or the environment. The sludge is left on a designated plot of land to be biodegraded naturally, but the process could take a considerable length of time. In this study, an enzyme known as EZ-Enzyme was tested to bioremediate the oily sludge sample in a laboratory scale experiment. Results shown that there was a consistent reduction in the oil and grease (O&G) content of the tested sludge (~ 60% in average). The O&G content decreased with increase in the concentration of enzyme. The O&G content in a sludge sample decreased the most with the application of 100 pm EZ-Enzyme, which decreased from 8% to 2% within a period of nine weeks. In general, the temperature and pH of the system were maintained at optimum condition, which were 35°C and pH 7 respectively. The quality of the leachate was also improved by the end of the study, where chemical oxygen demand (COD) was 25 mg/l and pH was 6.45 respectively

Item Type:Article
Uncontrolled Keywords:bioremediation, enzyme, oil and grease content, sludge farming
Subjects:T Technology > TD Environmental technology. Sanitary engineering
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:6742
Deposited By: Norhayati Abu Ruddin
Deposited On:30 Oct 2008 08:13
Last Modified:08 Jun 2014 01:37

Repository Staff Only: item control page