Study on the Mechanism of Flocculating Surimi Wastewater with Ferric Chloride

Abstract:

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.