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Title Treatment of wastewater from vegetable oil industry using modified laterite adsorbent
Journal International journal of Engineering And Applied Science
Publisher Faculty of Engineering, Nnamdi Azikiwe University, Awka Nigeria.
Issue 1
ISSN 1119-8109
Pages 46-51
Subject Chemical Engineering
Date of Publication 2008

AUTHOR(S) V. I. Ugonabo, O.D. Onukwuli, P.K. Igbokwe

ABSTRACT

The treatment of vegetable oil refining wastewater using modified laterite adsorbent was undertaken. The effluent quality parameters of interest were; colour, electrical conductivity, chlorides, iron, copper, nitrates, manganese, lead, chemical oxygen demand (COD) Biochemical oxygen demand(BOD), dissolved oxygen (DO), total dissolved solids (TDS), total suspended solids (TSS), oil and grease. Effluent waste water samples were treated in an adsorption column set-up using different dosages of low-cost laterite adsorbent. Results obtained after the treatment process showed that all the parameters tested for conformed to the Federal Ministry of Environment, Housing and Urban Development (FMEHUD) specification guidelines, with exception of the following parameters which the values were astronomically - BOD (179.425mg/l) TSS (111.25 mg/l), oil and grease (4.20 mg/l) and electrical conductivity (1.26 x 103 Ωcm-1). The maximum percentage reduction of the pollutants was achieved at a high dosage of laterite (350g). The adsorption process also obeyed the Freudlich and Langmuir Isotherms and modified laterite was also found to be a promising adsorbent for heavy metal uptake from vegetable oil refining wastewater.


Keywords: Removal; Pollutants; Vegetable oil refining wastewater; Laterite adsorbent




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