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Utilization of waste paper sludge as an alternative adsorbent for the adsorption of ammonia nitrogen and COD in stabilized landfill leachate

Daud, Zawawi and A Rahman, Shahril Effendi and Awang, Halizah and Abubakar, Mahmoud Hijab and Ridzuan, Mohd Baharudin and Tajarudin, Husnul Azan (2018) Utilization of waste paper sludge as an alternative adsorbent for the adsorption of ammonia nitrogen and COD in stabilized landfill leachate. International Journal of Integrated Engineering, 10 (9). pp. 105-109. ISSN 2229838X

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Abstract

Renewable and alternative fuels such as ethanol find application in several combustion devices. Fundamental characteristics of these fuels in terms of ignition and burning rate are to be understood in order to use them in these applications. In this study, a numerical analysis of auto ignition characteristics of ethanol is presented. Opposed flow configuration, in which fuel and nitrogen emerges from the bottom duct and hot air flows down from the top duct, has been employed. Commercial CFD software FLUENT is used in the simulations. Global single step mechanism is used to model kinetics. For various mass fractions of fuel, the air temperature at which auto-ignition occurs has been recorded. The numerical results are compared with the experimental data available in literature. Keywords: Renewable fuel, ethanol, numerical simulation, auto ignition, single-step mechanism Waste paper sludge (WPS) is produced by the paper industry during the wastewater treatment process of paper production. The disposal techniques of WPS pose a great concern for the environment. This study focuses on the evaluation of WPS as an alternative absorbent material to activated carbon (AC) for the removal of contaminants from stabilized landfill leachate. Ammonia (NH3-N) and chemical oxygen demand (COD) were identified as the two major contaminants in landfill leachate. Both AC and WPS were mixed together in different ratios. The optimum replacement for the absorbent was determined using the batch technique. The adsorption batch study was carried out under the optimum pH of 7, with a shaking speed of 200 rpm and a contact time of 120 minutes. The adsorption isotherms indicated that the Langmuir model was better fitted to the experimental data as it was found to have the highest regression values. The Langmuir adsorption capacities for COD and NH3-N were 32.26 mg/g and 21.60 mg/g, respectively. The optimum replacements were initially at two different ratios of 2:2 and 3:1 based on the optimum removal of COD and NH3-N, respectively. However, the final optimum replacement for the absorbents (AC: WPS) in this study was the ratio of 2:2 due to the higher removal of COD (85.9%) and NH3-N (49.3%).

Item Type: Article
Uncontrolled Keywords: Waste paper sludge; COD; NH3-N; landfill leachate; adsorption
Subjects: T Technology > TD Environmental technology. Sanitary engineering > TD1-157 Environmental technology. Sanitary engineering
Divisions: Faculty of Civil and Environmental Engineering > Department of Water and Environmental Engineering
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 30 Sep 2019 03:38
Last Modified: 30 Sep 2019 03:38
URI: http://eprints.uthm.edu.my/id/eprint/11774
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