alexa Abstract | Biological oxygen demand (BOD) removal of sugar industry waste water- A comparative study of adsorption capacity of PAC and GAC

Journal of Chemical and Pharmaceutical Research
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Rapid globalization leads us on the way to industrialization. Pollution of water by organic and inorganic chemicals is of serious environmental concern. Various treatment technologies have been utilized for organic load removal in waste water expressed as COD and BOD. Nevertheless, yet there is an extreme need to ascertain alternative and effective low cost treatment methods. Therefore, in this study potentials of waste water was analyzed and study of Powdered Activated Carbon (PAC) and Granular Activated Carbon (GAC) to remove variety of contaminants like COD and BOD was investigated. Both these material were prepared from wood and nutshell charcoal. PAC with specific surface area of 5602.352 cm2/gm and particle size 44 μ m and GAC with specific surface area of 10.50 cm2/gm and particle size 1.08 mm are used as adsorbents to the combined waste water of Sugar mill at room temperature. The different dosage of PAC and GAC is kept in contact for 24 hours and analyzed before and after treatment. The results of BOD removal follow the Freundlich and Langmuir adsorption isotherm. Among PAC and GAC -PAC removes 93.24% of BOD at the dose of 20 gm/L, whereas GAC removes 80% of BOD at the dose of 30 gm/L dosages. It proves that rates of adsorption increases with the reduction in particle size.

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Author(s): Lakdawala M M


Adsorption isotherm, Adsorption intensity (1/n), Adsorption energy (b x 103), Adsorption capacity (K,Ө0), Biological oxygen demand

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