陶瓷印花废水处理的混凝剂及工艺条件

采用混凝剂聚合氯化铝（PAC）、聚丙烯酰胺（PAM）、聚合硫酸铁（PFS）对陶瓷印花废水进行混凝沉降处理，监测水样的吸光度、浊度、悬浮物，以脱色率、浊度去除率、悬浮物去除率评价混凝处理的效果。结果表明：PAC是陶瓷印花废水沉降处理的理想混凝剂；水样的吸光度、浊度、悬浮物随混凝剂用量增大和沉降时间延长而呈降低趋势，而脱色率、浊度去除率、悬浮物去除率随混凝剂和沉降时间的增大呈增大的趋势；PAC投加量为20mg／L，沉降时间约为24h，水样脱色率达到90．0％，而当PAC投加量达到100mg／L，沉降时间约为4h，陶瓷印花水的脱色率可达到96．0％。证明了药剂用量的增加与沉降时间的延长对混凝过程具有增效作用。

Coagulant and processing conditions of ceramic printing wastewater treatment

Ceramic printing wastewater was treated with the method of coagulation and sedimentation by the coagulants of PAC, PAM, PFS. The treatment effects of coagulants were evaluated by decolorization removal rate, turbidity removal rate, suspended solid removal rate by being monitored absorbency, turbidity, suspended matter of water. The results show that PAC is an ideal coagulant for the ceramic printing wastewater treatment. The treatment effect of ceramic printing wastewater was studied with the different coagulant dosages and settlement times. The experiments show that water absorbency, turbidity, suspended solids decreased with the increase of coagulant dosages and the extendion of settling time, and that decolorization, turbidity removal rate and suspended substance removal rate increased with the increase of PAC dosages and the extendion of settlement time. Under the conditions of PAC dosage of 20 mg/L, and the settling time of 24 h, the water decolorization reaches 90.0%. Under the conditions of the PAC dosage of 100 mg/L, the settling time of 4 h, ceramic printing wastewater decolorization can reach 96.0%. These prove that the increase of reagent amount and the extend of settling time has synergies to the coagulation process.