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-  2018 

三氯化铁法絮凝鱼糜漂洗有机废水的机理研究

DOI: 10.3969/j.issn.1673-1689.2018.08.014

Keywords: 三氯化铁 鱼糜漂洗废水 絮凝机理 zeta电位 扫描电镜
ferric chloride
,surimi waste-water,mechanism of flocculation,zeta potential,scanning electron microscope(SEM)

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Abstract:

以鱼糜漂洗废水为处理对象,采用zeta电位仪和扫描电镜,测得不同pH下,絮凝悬浮液的zeta电位值及絮凝沉淀物的表面结构,获得了三氯化铁与鱼糜漂洗废水中蛋白质的絮凝机理。结果表明:pH 3~5之间蛋白质失稳由压缩双电层机理和电中和机理起作用,pH 5~6之间蛋白质的脱稳絮凝主要取决于电中和机理,pH 6~8之间以吸附架桥为主要絮凝机理,且存在网捕卷扫作用,pH 9~10主要是生成Fe(OH)3沉淀的网捕卷扫作用实现了对蛋白质的絮凝。
The mechanism of flocculation was investigated by zeta potential of surimi waste-water and scanning electron microscope(SEM) images of flocs at different pH. Results showed that at pH 3-5,the mechanism of charge neutralization and double layer compression mainly lead to protein instability;at pH 5-6,protein was flocculated mainly by the mechanism of charge neutralization;at pH 6-8,the mechanism of flocculating mainly depends on adsorption bridging and sweep flocculation;at pH 9-10,sweep flocculation was the main mechanism of flocculating surimi waste-water with ferric chloride

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