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    Home > Chemicals Industry > Chemical Technology > Synthetic organic cationic sludge dewatering agent

    Synthetic organic cationic sludge dewatering agent

    • Last Update: 2021-12-31
    • Source: Internet
    • Author: User
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    Synthetic organic polymer sludge dewatering agent has the characteristics of large molecular weight, many active groups in the molecule, and easy to mutually adsorb with sludge colloidal particles to form large flocs.
    It has an absolute advantage in the market

    .
    At present, synthetic polymer sludge dehydrating agents mainly use
    propylene , maleic acid, etc.
    as raw materials,
    and one or more of —COOH, —CONH
    2 , —OH, —CO, etc.
    , as active groups.
    The relative Water-soluble linear compounds with molecular masses ranging from tens of thousands to tens of millions

    .
    About 80% of foreign organic polymer sludge dewatering agents are synthetic.
    China only began to conduct professional research on synthetic sludge dewatering agents in the 1990s

    .
    Product types generally include aqueous solution type, dry powder type and latex type

    .

    In sludge dewatering, cationic and amphoteric polymer sludge dewatering agents have better application effects
    .

    Synthetic organic cationic sludge dewatering agent

    Since most of the sludge adsorbs negatively charged ions, the sludge is generally negatively charged
    .
    Adding cationic sludge dewatering agent can neutralize its negative charge and weaken the repulsive force of the same charge between the internal bacterial micelles, thereby having the opportunity to combine in the collision to form larger bacterial micelles and finally detach from the sewage At the same time, the cationic sludge dewatering agent with large molecular weight also has the bridging ability, which promotes its flocculation and dewatering

    .
    Therefore, it has become the main product of sludge treatment in sewage treatment plants and occupies most of the sludge dewatering market

    .
    In recent years, with people’s in-depth research on the dewatering performance of different types of cationic sludge dewatering agents and practical application requirements, the cationic sludge dewatering agents used in the treatment of sludge have begun to shift from a single cationic homopolymer to several cations.
    Copolymers of monomers or their composites

    .
    For example, amidine cationic polymers, cationic cellulose derivatives and cationic polymers containing quaternary ammonium groups obtained by acid hydrolysis of copolymers of N-vinyl methyl ether amine and acrylonitrile are used to treat sludge

    .
    The advantages of using copolymers or composite flocculants are: it can reduce the cost of flocculants and improve the efficiency of dehydration

    .
    The reason may be that cationic groups with different structures have different ability to attract negative charges, so they have a strong adsorption and bridging effect on various types of sludge particles with different charges, thereby improving the dehydration efficiency

    .

    In terms of product formulation, in addition to traditional powder and water-in-oil emulsion products, people have recently developed water-in-water cationic emulsions
    .

     

     

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