The studies on biodegradation and adsorption of dissolved organic carbon (molasses) in sand medium through batch experimental design.

Endut, Azizah and Goh Eng Giap, Sunny and Eng, Bee Kien and Jusoh, Ahmad (2011) The studies on biodegradation and adsorption of dissolved organic carbon (molasses) in sand medium through batch experimental design. In: Challenges in Environmental Science and Engineering, 25 – 30 Sept 2011, Tainan City, Taiwan.

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Abstract

Dissolved Organic Carbon (DOC) in river system is either naturally produced or artificially introduced through human activities. It can alter the properties of aquatic ecosystem by transporting contaminants or metal throughout the freshwater ecosystem. The current work is to investigate the individual and the combined effect of biodegradation and adsorption in reducing DOC (molasses) through batch test studies. The adsorption, biodegradation and adsorption-biodegradation experimentation were carried out in laboratory scale. The former experimentation was carried out on sand medium sampled from river system, while the latter two experimentations were conducted on river water and/or sand medium. Different concentration of molasses (0-30 ppm), sand sizes (from very fine to coarse sand) and masses (10-50 g) were investigated. High concentration of DOC caused high degradation rate and adsorption rate. Increasing the masses of sand and decreasing the particles sand sizes increase the adsorption rate. The results indicate that a treatment system with a detention time of 15 days is required to effectively reduce DOC in the river water with the presence of sand medium. In modeling, First-Order Exponential Decay model, Goh’s Biodegradation Model and Pseudo-First-Order Model provided better goodness of fit with R-squared greater than 0.95.

Item Type: Conference or Workshop Item (Paper)
Keywords: adsorption on sand; biodegradation in river water; treatment of molasses; DOC; batch studies
Subjects: Q Science > Q Science (General)
Faculty / Institute: East Coast Environmental Research Institute (ESERI)
Depositing User: AP DR AZIZAH ENDUT
Date Deposited: 08 Nov 2015 03:51
Last Modified: 08 Nov 2015 06:51
URI: http://erep.unisza.edu.my/id/eprint/3783

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