Arslan E Işil, Aslan Sibel, Ipek Ubeyde, Altun Samet, Yazicioğlu Salih
Firat University, Engineering Faculty, Environmental Engineering Department, Elazig, Turkey.
Waste Manag Res. 2005 Dec;23(6):550-9. doi: 10.1177/0734242X05059668.
In the first part of this study, the treatability of marble processing wastewater by the coagulation-flocculation process was investigated. Optimum coagulant-flocculant doses for turbidity removal in wastewater from the cutting, faience and equalization processes were determined as 500, 200 and 500 ppm of Al2(SO4)3; 300, 500 and 300 ppm of FeCl3 and 600, 400 and 200 ppm of Agrofloc 100 (AGRON Water Treatment Technologies and Chemical Marketing Industry and Trade Limited Company, Izmir, Turkey), respectively. It was found that the removal of total solids from cutting and equalization process wastewaters was highest for the 100 ppm dosage of all chemicals used. The amount of total solids removed from faience process wastewater by Agrofloc 100 was higher than that removed by the other chemicals used. The removals of suspended solids from cutting, faience and equalization process wastewaters were similar to each other for each of the chemicals. The pH values after treatment by Agrofloc 100 were higher than the values determined after treatment by other chemicals for all process wastewater. Electrical conductivity values, however, were lower for Agrofloc 100 than for the others. Settled sludge volume experiments showed that settled sludge volumes decreased with time. The results of the quiescent settling experiment showed that the settling type could be termed flocculent settling. In the second part of the study, the usage of waste sludge from marble processing as an additive material in cement was investigated. The waste sludge originated from the wastewaters of different steps of the marble processing plant. Waste sludge was replaced with cement at various percentages by weight to prepare the mixtures of mortar. The specimens poured into the moulds were held for 24 h, removed from the moulds and held again for 28 days in lime-saturated water at 23 degrees C. Compressive and flexural strengths were evaluated with respect to percentages of waste sludge replaced with cement. The maximum compressive and flexural strengths were observed for specimens containing a 6% waste sludge when compared with control and it was also found that waste sludge up to 9% could effectively be used as an additive material in cement.
在本研究的第一部分，对混凝-絮凝工艺处理大理石加工废水的可行性进行了研究。确定了用于去除切割、彩陶和均衡工艺废水中浊度的最佳混凝剂-絮凝剂剂量，分别为500、200和500 ppm的硫酸铝；300、500和300 ppm的氯化铁以及600、400和200 ppm的Agrofloc 100（AGRON水处理技术与化工营销工业贸易有限公司，土耳其伊兹密尔）。结果发现，对于所使用的所有化学品，100 ppm剂量时从切割和均衡工艺废水中去除的总固体量最高。Agrofloc 100从彩陶工艺废水中去除的总固体量高于其他所使用的化学品。对于每种化学品，切割、彩陶和均衡工艺废水中悬浮固体的去除情况彼此相似。对于所有工艺废水，经Agrofloc 100处理后的pH值高于经其他化学品处理后测定的值。然而，Agrofloc 100的电导率值低于其他化学品。沉淀污泥体积实验表明，沉淀污泥体积随时间减少。静态沉降实验结果表明，沉降类型可称为絮凝沉降。在研究的第二部分，研究了大理石加工产生的废污泥作为水泥添加剂材料的用途。废污泥来自大理石加工厂不同步骤的废水。按不同重量百分比用废污泥替代水泥来制备砂浆混合物。倒入模具中的试样放置24小时，从模具中取出，然后在23摄氏度的饱和石灰水中再放置28天。根据用水泥替代的废污泥百分比评估抗压强度和抗折强度。与对照相比，含6%废污泥的试样观察到最大抗压强度和抗折强度，还发现高达9%的废污泥可有效地用作水泥中的添加剂材料。
