聚硅酸铝铁(PSAF)处理印染废水实验研究

论文编号:HJ008 论文字数:20593,页数:34

聚硅酸铝铁(PSAF)处理印染废水实验研究

摘 要

印染废水的治理是我国现行工业废水治理领域的几大难题之一。本文以聚硅酸铝铁(PSAF)为混凝剂，通过实验找出影响混凝效果的主要因素，研究了聚硅酸铝铁处理印染废水的最佳工艺条件，如聚硅酸铝铁投加量、Al/Fe摩尔比及废水酸度。实验结果表明，水样的pH为7.0，聚硅酸铝铁Al/Fe摩尔比为3/1，质量浓度为64mg/L时，脱色率可达79.70%，SS的去除率为83.2%，CODCr去除率为73.3%；与传统的聚合氯化铝(PAC)和聚合硫酸铁(PFS)相比，聚硅酸铝铁的除浊、脱色等效果均好于聚合氯化铝和聚合硫酸铁，其污泥沉降体积最小，沉降时间最短，处理废水后水中残余量低，处理费用低等特点。

关键词：聚硅酸铝铁(PSAF) 印染废水 脱色率

Studies on Treatment of Dyeing Wastewater with

Polysilic Aluminium Ferric Flocculants

ABSTEACT

Treatment of dyeing wastewater is one of the few major problem areas in the current industrial wastewater treatment. Through the experiment flocculation effect affecting the main factors, dyeing treatment by using polysilicate aluminum ferric (PSAF) as coagulant was studied. The optim altreatment conditions with the combined coagulant system were investigated, such as coagulant dosage, Al/Fe mole ratio, acidity of waste water. Experimental results show that the optimal parameters were polysilicate aluminum ferric: the best pH was 7.0, Al/Fe mole ratio was 3/1, dosage of 64mg/L, the best removal of decolorization rate, SS and CODCr was 79.70%, 83.20% and 73.30%. In comparison with the conventional coagulants , such as PAC (polyaluminium chloride) and PFS (polyferric sulfate) , the coagulation performance of PSAF is characterized by higher settlement rate, smaller sludge volume , lower remains of pollutants in the treater dyeing effluent and lower cost of treatment.

Keywords: polysilicate-aluminum-ferric dyeing wastewater decolorization rate

目 录

摘 要I

ABSTEACTⅡ

1概述1

1.1我国的水资源现状1

1.2印染废水来源、水质及水量2

1.2.1印染废水的来源2

1.2.2印染废水的水质及水量2

1.3印染废水的特点和危害3

1.3.1废水的特点3

1.3.2废水的危害3

1.4印染废水的处理方法及研究进展3

1.4.1印染废水的处理方法3

1.4.2 研究进展7

1.5混凝过程与混凝剂8

1.5.1混凝过程8

1.5.2混凝作用的基本原理8

1.5.3混凝剂的分类9

1.5.4混凝剂的发展趋势9

1.6研究的意义10

2实验部分11

2.1实验目的11

2.2 PSAF混凝实验原理11

2.3 实验主要仪器及试剂11

2.4实验步骤12

2.5聚硅酸铝铁的制备13

2.6 PSAF胶凝时间的测定13

2.7 废水来源、水量与水质13

2.7.1废水来源、水量与处理工艺13

2.7.2废水水质14

2.7.3印染废水的排放标准14

2.8水污染项目的分析方法15

2.9 脱色率的测定15

3结果与讨论16

3.1 pH对聚硅酸稳定性的影响16

3.2 Al/Fe摩尔比对PSAF混凝性能的影响17

3.3 Al/Fe摩尔比对废水脱色效能的影响17

3.4 混凝剂投加量对混凝效果的影响18

3.5 pH值对混凝效果的影响19

3.6 沉降时间对脱色效果的影响20

3.7不同混凝剂对污染因子去除率的比较21

3.8不同混凝剂混凝沉降性能的比较22

4.结论与展望24

4.1 结论24

4.2展望24

参考文献：26

谢 辞29