Clarification of rubber mill wastewater by a plant based biopolymer- comparison with common inorganic coagulants

Sumona Mukherjee, Agamuthu Pariatamby, Jaya Narayan Sahu, Bhaskar Sen Gupta  

    Research output: Contribution to journalArticle

    15 Citations (Scopus)


    Background: In this study, the efficiency of Guar gum as a biopolymer has been compared with two other widely used inorganic coagulants, ferric chloride (FeCl3) and aluminum chloride (AlCl3), for the treatment of effluent collected from the rubber-washing tanks of a rubber concentrate factory. Settling velocity distribution curves were plotted to demonstrate the flocculating effect of FeCl3, AlCl3 and Guar gum. FeCl3 and AlCl3 displayed better turbidity removal than Guar gum at all settling velocities.

    Result: FeCl3, AlCl3 and Guar gum removed 92.8%, 88.2% and 88.1% turbidity, respectively, of raw wastewater at a settling velocity of 0.1 cm min-1, respectively. Scanning electron microscopic (SEM) study conducted on the flocs revealed that Guar gum and FeCl3produced strong intercoiled honeycomb patterned floc structure capable of entrapping suspended particulate matter. Statistical experimental design Response Surface Methodology (RSM) was used to design all experiments, where the type and dosage of flocculant, pH and mixing speed were taken as control factors and, an optimum operational setting was proposed.

    Conclusion: Due to biodegradability issues, the use of Guar gum as a flocculating agent for wastewater treatment in industry is highly recommended.
    Original languageEnglish
    Pages (from-to)1864-1873
    Number of pages10
    JournalJournal of Chemical Technology and Biotechnology
    Issue number10
    Publication statusPublished - Oct 2013


    • biopolymer;biodegradable;wastewater treatment;flocculant;flocs
    • Inorganic Chemistry
    • Waste Management and Disposal
    • Pollution
    • Organic Chemistry
    • Renewable Energy, Sustainability and the Environment
    • Biotechnology
    • Chemical Engineering(all)
    • Fuel Technology

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