洗涤废水化学法除磷试验研究

Experiement on Chemical Removal of Phosphoris in Laundry Wastewater

对Ａｌ２（ＳＯ４）３，Ｃａ（ＯＨ）２不同反应条件下去除洗涤废水中总磷的情况作了对比试验，结果表明：按Ｃａ（ＯＨ）２∶ＴＰ＝３．７∶１．０（重量比）投加试剂，回用生成的磷灰石沉淀助凝，ＴＰ（总磷）去除率可达９５％，ＣＯＤｃｒ有少量去除。

This paper is mainly about the effects of different reaction conditions on TP removal ratio for laundry waste water with lime and alum as the sedimentation chemicals,respectively.Through technical and economic comparison,lime is proved to be an effectire and suitable TP removal chemical for laundry waste water.It is showed from the experiments results that the TP removal could reach 95% with some COD cr reduction when lime is added with the ratio of Ca(OH)∶P=3.7∶1.0(W/W) and the crystal Ca 5OH(PO 4) 3 as accelerative coagulant without adjustment of the onitial pH of the raw waste water.