三氯化铁法絮凝鱼糜漂洗有机废水的机理研究

Study on the Mechanism of Flocculating Surimi Wastewater with Ferric Chloride

DOI：10.3969/j.issn.1673-1689.2018.08.014

中文关键词: 三氯化铁 鱼糜漂洗废水 絮凝机理 zeta电位 扫描电镜

英文关键词: ferric chloride,surimi waste-water,mechanism of flocculation,zeta potential,scanning electron microscope（SEM）

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中文摘要:

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。

英文摘要:

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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