Ellouze E, Amar R B, Boufi S, Salah A B
Laboratoire des Sciences de Matériaux et Environnement, Faculté des Sciences de Sfax BP 759 Route de Soukra Km 4, 3000 Sfax, Tunisia.
Environ Technol. 2003 Nov;24(11):1357-66. doi: 10.1080/09593330309385680.
Coagulation-flocculation of the colloids particles present in the cuttlefish effluents was investigated using a coagulation step with aluminium sulphate (SA), followed by a flocculation step with starch, SiO2 or MgO and then poly dimethyl ammonium chloride (PDMAC), in order to reduce the turbidity and chemical oxygen demand (COD). Kinetic aspects, adsorption equilibrium, pH and conductivity were studied in order to determine the optimum coagulation conditions and SA quantities. The addition of organic polymer as a flocculant agent gave a better performance than the use of salt alone with a reduction of 50% of the SA consumption. Polymer molecular weight of PDMAC and charge density of starch have been also investigated. The best result, which is 90% of removal rate in chemical oxygen demand (COD) and a turbidity value of 7 NTU was obtained with the combination using 165.5 mg l(-1) of aluminium sulphate, 750 mg l(-1) of MgO and 35 mg l(-1) of PDMAC 400000.
为了降低浊度和化学需氧量（COD），对乌贼废水里存在的胶体颗粒进行了混凝-絮凝研究，采用硫酸铝（SA）进行混凝步骤，接着用淀粉、二氧化硅或氧化镁进行絮凝步骤，然后使用聚二甲基氯化铵（PDMAC）。研究了动力学方面、吸附平衡、pH值和电导率，以确定最佳混凝条件和硫酸铝用量。添加有机聚合物作为絮凝剂比单独使用盐的性能更好，硫酸铝消耗量减少了50%。还研究了聚二甲基氯化铵的聚合物分子量和淀粉的电荷密度。使用165.5 mg l(-1)硫酸铝、750 mg l(-1)氧化镁和35 mg l(-1) 400000的聚二甲基氯化铵组合，获得了最佳结果，化学需氧量（COD）去除率达90%，浊度值为7 NTU。
