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A study on the application of Fenton process followed by coagulation for treatment of landfill leachate

Dung, N.T. and Van Thanh, B. and Huy, N.N. (2020) A study on the application of Fenton process followed by coagulation for treatment of landfill leachate. Vietnam Journal of Chemistry, 58 (6). pp. 792-797. ISSN 25728288

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Abstract

In this study, leachate from Quang Hanh landfill (Quang Ninh) was treated by a combination of Fenton and coagulation processes. The experiment was conducted with various Fenton (i.e., pH, H2O2/Fe(II) ratio and dosage, and reaction time) and coagulation (i.e., dosage, aeration time, and flocculant concentration) conditions to determine the best condition for treatment of the leachate. Regarding Fenton process, under the best condition, the COD removal efficiency of around 80 % with an inlet concentration of 624±80 mg/L, meeting QCVN 25:2009/BTNMT (Column B2) while 75 % of color, 25 % of ammonia, and 12 % of TSS were removed, creating favorable conditions for the next stage of treatment by coagulation. In terms of coagulation, CaO and polyaluminum chloride (PAC) were sequentially used for treating the leachate after Fenton process. After treatment with CaO (6 g/L, 180 min), PAC (1,500 mg/L), and A101 (2 mg/L), the removal efficiencies achieved 85 %, 99 %, 99-99.5 %, and 88 % for COD, color, ammonia, and TSS, respectively, and the effluent can meet the treatment requirement by the discharge standards. © 2020 Vietnam Academy of Science and Technology, Hanoi & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Item Type: Article
Divisions: Faculties > Faculty of Physical and Chemical Engineering
Identification Number: 10.1002/vjch.202000084
Uncontrolled Keywords: Ammonia; Calcium oxide; Chlorine compounds; Coagulation; Efficiency; Effluent treatment; Effluents; Hydrogen peroxide; Oxidation; Coagulation process; COD removal efficiency; Discharge standards; Favorable conditions; Flocculant concentrations; Inlet concentration; Polyaluminum chloride; Removal efficiencies; Leachate treatment
Additional Information: Language of original document: English.
URI: http://eprints.lqdtu.edu.vn/id/eprint/8847

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