Abstract:

The new composite bioflocculant MBF-737 has been prepared by the inexpensive swine wastewater medium. It can be combined with chemical flocculant FeCl₃ for treating actual printing and dyeing wastewater. The optimum technical conditions are ascertained as follows:when 100 mL of printing and dyeing wastewater,2 mL 2.5 g/L of MBF-737,4 mL 5 g/L of FeCl₃,and 3 mL 1% of CaCl₂ are added,its initial pH is adjusted to 9,fast stirring at 260 r/min for 300 s and slow stirring at 100 r/min for 80 s,the flocculation rate, turbidity removing rate and chroma removing rate are 73.81%,79.91% and 86.5%,respectively. It is characterized by less flocculant dosage,and high removing rate,having good pretreatment effect on printing and dyeing wastewater.

Key words: printing and dyeing wastewater, bioflocculant, composite flocculant

摘要：

以养猪废水廉价培养基制备了新型复合型生物絮凝剂MBF-737，将其与化学絮凝剂FeCl₃复配使用处理实际印染废水，并确定最佳工艺条件：对于100 mL印染废水，投加2 mL 2.5 g/L的MBF-737、4 mL 5 g/L的FeCl₃、3 mL 1% CaCl₂，调节初始pH为9，在260 r/min快速搅拌300 s，100 r/min慢速搅拌80 s，絮凝率、除浊率、色度去除率分别为73.81%、 79.91%、86.5%。复合絮凝剂投加量少、去除率高，对印染废水具有较好的预处理效果。

关键词: 印染废水, 生物絮凝剂, 复合絮凝剂

CLC Number: 

• X703