用FeSO₄作混凝剂对含高浓度次氯酸钠的水产品加工废水进行预处理试验研究。试验结果表明,当pH控制在8.5～9.0之间,FeSO₄投加质量浓度为3g/L时,BOD₅/COD由0.13提高到0.40,次氯酸钠对废水的可生化性影响最小,废水的可生化性得以提高;经过混凝预处理后,废水的COD去除率约在26.40%-28.64%。生产试验证明,用FeSO₄作混凝剂对废水进行预处理,可保证其后续生化处理效果。

FeSO₄ regarded as coagulating agent is used for pretreating aquatic product processing wastewater containing sodium hypochlorite with high concentration． The results show that BOD_y／COD can be increased from 0．13 to 0-40 under the condition that pH is ranged from 8．5 to 9．0 and the dosage of FeSO₄ is 3 g／L． Simultan eously sodium hypochlorite has less efect on the biodegradability which Can be enhanced effectively under this condition．After the pretreatment of coagulation．the removal eficiency of COD iS from 26．40％ to 28．64％.And the fu11．scale experiment shows that using FeSO₄ as coagulant Can get better treatment efect．