聚硅酸鋁鐵(PSAF)處理印染廢水實驗研究

論文編號:HJ008  論文字數:20593,頁數:34

聚硅酸鋁鐵(PSAF)處理印染廢水實驗研究

摘  要

 印染廢水的治理是我國現行工業廢水治理領域的幾大難題之一。本文以聚硅酸鋁鐵(PSAF)為混凝劑，通過實驗找出影響混凝效果的主要因素，研究了聚硅酸鋁鐵處理印染廢水的最佳工藝條件，如聚硅酸鋁鐵投加量、Al/Fe摩爾比及廢水酸度。實驗結果表明，水樣的pH為7.0，聚硅酸鋁鐵Al/Fe摩爾比為3/1，質量濃度為64mg/L時，脫色率可達79.70%，SS的去除率為83.2%，CODCr去除率為73.3%；與傳統的聚合氯化鋁(PAC)和聚合硫酸鐵(PFS)相比，聚硅酸鋁鐵的除濁、脫色等效果均好于聚合氯化鋁和聚合硫酸鐵，其污泥沉降體積最小，沉降時間最短，處理廢水后水中殘余量低，處理費用低等特點。
 
關鍵詞：聚硅酸鋁鐵(PSAF) 印染廢水 脫色率

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   錄
 
 摘  要 I
 ABSTEACT Ⅱ
1概述 1
1.1我國的水資源現狀 1
1.2印染廢水來源、水質及水量 2
1.2.1印染廢水的來源 2
1.2.2印染廢水的水質及水量 2
1.3印染廢水的特點和危害 3
1.3.1廢水的特點 3
1.3.2廢水的危害 3
1.4印染廢水的處理方法及研究進展 3
1.4.1印染廢水的處理方法 3
1.4.2 研究進展 7
1.5混凝過程與混凝劑 8
1.5.1混凝過程 8
1.5.2混凝作用的基本原理 8
1.5.3混凝劑的分類 9
1.5.4混凝劑的發展趨勢 9
1.6研究的意義 10
2實驗部分 11
2.1實驗目的 11
2.2 PSAF混凝實驗原理 11
2.3 實驗主要儀器及試劑 11
2.4實驗步驟 12
2.5聚硅酸鋁鐵的制備 13
2.6 PSAF膠凝時間的測定 13
2.7 廢水來源、水量與水質 13
2.7.1廢水來源、水量與處理工藝 13
2.7.2廢水水質 14
2.7.3印染廢水的排放標準 14
2.8水污染項目的分析方法 15
2.9  脫色率的測定 15
3結果與討論 16
3.1 pH對聚硅酸穩定性的影響 16
3.2 Al/Fe摩爾比對PSAF混凝性能的影響 17
3.3 Al/Fe摩爾比對廢水脫色效能的影響 17
3.4 混凝劑投加量對混凝效果的影響 18
3.5 pH值對混凝效果的影響 19
3.6 沉降時間對脫色效果的影響 20
3.7不同混凝劑對污染因子去除率的比較 21
3.8不同混凝劑混凝沉降性能的比較 22
4.結論與展望 24
4.1 結論 24
4.2展望 24
 參考文獻： 26
謝  辭 29