A comparative study of biopolymers and alum in the separation and recovery of pulp fibres from paper mill effluent by flocculation

Sumona Mukherjee, S Mukhopadhyay, A Pariatamby, M A Hashim, Bhaskar Sen Gupta

    Research output: Contribution to journalArticle

    Abstract

    Recovery of cellulose fibres from paper mill effluent has been studied using common polysaccharides or biopolymers such as Guar gum, Xanthan gum and Locust bean gum as flocculent. Guar gum is commonly used in sizing paper and routinely used in paper making. The results have been compared with the performance of alum, which is a common coagulant and a key ingredient of the paper industry. Guar gum recovered about 3.86 mg/L of fibre and was most effective among the biopolymers. Settling velocity distribution curves demonstrated that Guar gum was able to settle the fibres faster than the other biopolymers; however, alum displayed the highest particle removal rate than all the biopolymers at any of the settling velocities. Alum, Guar gum, Xanthan gum and Locust bean gum removed 97.46%, 94.68%, 92.39% and 92.46% turbidity of raw effluent at a settling velocity of 0.5 cm/min, respectively. The conditions for obtaining the lowest sludge volume index such as pH, dose and mixing speed were optimised for guar gum which was the most effective among the biopolymers. Response surface methodology was used to design all experiments, and an optimum operational setting was proposed. The test results indicate similar performance of alum and Guar gum in terms of floc settling velocities and sludge volume index. Since Guar gum is a plant derived natural substance, it is environmentally benign and offers a green treatment option to the paper mills for pulp recycling.


    Original languageEnglish
    Pages (from-to)1851-1860
    Number of pages10
    JournalJournal of Environmental Sciences
    DOIs
    Publication statusPublished - Sep 2014

    Fingerprint

    settling velocity
    flocculation
    comparative study
    mill
    effluent
    locust
    sludge
    polysaccharide
    cellulose
    turbidity
    recycling
    pulp
    fibre
    paper
    experiment
    index

    Keywords

    • Biopolymer; Recovery of fibres; Guar gum; Flocculation; Paper industry

    Cite this

    @article{d461f7e127f74f1380484357eb601fe2,
    title = "A comparative study of biopolymers and alum in the separation and recovery of pulp fibres from paper mill effluent by flocculation",
    abstract = "Recovery of cellulose fibres from paper mill effluent has been studied using common polysaccharides or biopolymers such as Guar gum, Xanthan gum and Locust bean gum as flocculent. Guar gum is commonly used in sizing paper and routinely used in paper making. The results have been compared with the performance of alum, which is a common coagulant and a key ingredient of the paper industry. Guar gum recovered about 3.86 mg/L of fibre and was most effective among the biopolymers. Settling velocity distribution curves demonstrated that Guar gum was able to settle the fibres faster than the other biopolymers; however, alum displayed the highest particle removal rate than all the biopolymers at any of the settling velocities. Alum, Guar gum, Xanthan gum and Locust bean gum removed 97.46{\%}, 94.68{\%}, 92.39{\%} and 92.46{\%} turbidity of raw effluent at a settling velocity of 0.5 cm/min, respectively. The conditions for obtaining the lowest sludge volume index such as pH, dose and mixing speed were optimised for guar gum which was the most effective among the biopolymers. Response surface methodology was used to design all experiments, and an optimum operational setting was proposed. The test results indicate similar performance of alum and Guar gum in terms of floc settling velocities and sludge volume index. Since Guar gum is a plant derived natural substance, it is environmentally benign and offers a green treatment option to the paper mills for pulp recycling.",
    keywords = "Biopolymer; Recovery of fibres; Guar gum; Flocculation; Paper industry",
    author = "Sumona Mukherjee and S Mukhopadhyay and A Pariatamby and Hashim, {M A} and {Sen Gupta}, Bhaskar",
    note = "M1 - Article",
    year = "2014",
    month = "9",
    doi = "10.1016/j.jes.2014.06.029",
    language = "English",
    pages = "1851--1860",
    journal = "Journal of Environmental Sciences",
    issn = "1001-0742",
    publisher = "Chinese Academy of Sciences",

    }

    A comparative study of biopolymers and alum in the separation and recovery of pulp fibres from paper mill effluent by flocculation. / Mukherjee, Sumona; Mukhopadhyay, S; Pariatamby, A; Hashim, M A; Sen Gupta, Bhaskar.

    In: Journal of Environmental Sciences, 09.2014, p. 1851-1860.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - A comparative study of biopolymers and alum in the separation and recovery of pulp fibres from paper mill effluent by flocculation

    AU - Mukherjee, Sumona

    AU - Mukhopadhyay, S

    AU - Pariatamby, A

    AU - Hashim, M A

    AU - Sen Gupta, Bhaskar

    N1 - M1 - Article

    PY - 2014/9

    Y1 - 2014/9

    N2 - Recovery of cellulose fibres from paper mill effluent has been studied using common polysaccharides or biopolymers such as Guar gum, Xanthan gum and Locust bean gum as flocculent. Guar gum is commonly used in sizing paper and routinely used in paper making. The results have been compared with the performance of alum, which is a common coagulant and a key ingredient of the paper industry. Guar gum recovered about 3.86 mg/L of fibre and was most effective among the biopolymers. Settling velocity distribution curves demonstrated that Guar gum was able to settle the fibres faster than the other biopolymers; however, alum displayed the highest particle removal rate than all the biopolymers at any of the settling velocities. Alum, Guar gum, Xanthan gum and Locust bean gum removed 97.46%, 94.68%, 92.39% and 92.46% turbidity of raw effluent at a settling velocity of 0.5 cm/min, respectively. The conditions for obtaining the lowest sludge volume index such as pH, dose and mixing speed were optimised for guar gum which was the most effective among the biopolymers. Response surface methodology was used to design all experiments, and an optimum operational setting was proposed. The test results indicate similar performance of alum and Guar gum in terms of floc settling velocities and sludge volume index. Since Guar gum is a plant derived natural substance, it is environmentally benign and offers a green treatment option to the paper mills for pulp recycling.

    AB - Recovery of cellulose fibres from paper mill effluent has been studied using common polysaccharides or biopolymers such as Guar gum, Xanthan gum and Locust bean gum as flocculent. Guar gum is commonly used in sizing paper and routinely used in paper making. The results have been compared with the performance of alum, which is a common coagulant and a key ingredient of the paper industry. Guar gum recovered about 3.86 mg/L of fibre and was most effective among the biopolymers. Settling velocity distribution curves demonstrated that Guar gum was able to settle the fibres faster than the other biopolymers; however, alum displayed the highest particle removal rate than all the biopolymers at any of the settling velocities. Alum, Guar gum, Xanthan gum and Locust bean gum removed 97.46%, 94.68%, 92.39% and 92.46% turbidity of raw effluent at a settling velocity of 0.5 cm/min, respectively. The conditions for obtaining the lowest sludge volume index such as pH, dose and mixing speed were optimised for guar gum which was the most effective among the biopolymers. Response surface methodology was used to design all experiments, and an optimum operational setting was proposed. The test results indicate similar performance of alum and Guar gum in terms of floc settling velocities and sludge volume index. Since Guar gum is a plant derived natural substance, it is environmentally benign and offers a green treatment option to the paper mills for pulp recycling.

    KW - Biopolymer; Recovery of fibres; Guar gum; Flocculation; Paper industry

    U2 - 10.1016/j.jes.2014.06.029

    DO - 10.1016/j.jes.2014.06.029

    M3 - Article

    SP - 1851

    EP - 1860

    JO - Journal of Environmental Sciences

    JF - Journal of Environmental Sciences

    SN - 1001-0742

    ER -