本文選題：直接染料廢水 + 預(yù)處理��； 參考：《蘭州大學(xué)》2015年碩士論文

【摘要】：直接染料是染料行業(yè)產(chǎn)量最大的一類染料。直接染料廢水具有水量大、成分復(fù)雜、色度高、酸堿度變化大、可生化性差等特點(diǎn),處理難度大,需要對(duì)其進(jìn)行預(yù)處理。傳統(tǒng)廢水預(yù)處理技術(shù)(如吸附法、臭氧氧化法等)處理直接染料廢水都存在著處理效果不好或處理成本高等不足,研究經(jīng)濟(jì)有效的直接染料廢水預(yù)處理技術(shù)具有較強(qiáng)的理論意義以及社會(huì)實(shí)踐價(jià)值。本文針對(duì)配制的直接染料大紅廢水進(jìn)行染料廢水處理模擬研究。采用微電解技術(shù)對(duì)直接染料廢水進(jìn)行預(yù)處理,以色度去除率和COD去除率作為評(píng)價(jià)指標(biāo),通過多次單因素實(shí)驗(yàn)確定微電解技術(shù)預(yù)處理染料廢水的最佳條件,確定最佳條件后擴(kuò)大廢水處理規(guī)模。針對(duì)出水顏色偏黃問題,在微電解技術(shù)處理后采用絮凝沉淀法和砂濾技術(shù)對(duì)出水做進(jìn)一步深度預(yù)處理,提高廢水的處理效果。研究成果如下：(1)微電解技術(shù)預(yù)處理染料廢水的最佳反應(yīng)條件為：pH為1.2-1.3,鐵碳比為1：1,鐵碳投加量為45克/L(廢水)；該條件下廢水色度去除率在99%左右；COD去除率30%左右。(2)染料廢水經(jīng)過微電解技術(shù)預(yù)處理后再進(jìn)行絮凝沉淀和砂濾處理,可使出水色度與COD去除率分別提高至99.8%、60%左右；同時(shí)可將出水中99.9%以上的鐵去除。(3)與單獨(dú)微電解技術(shù)相比,微電解聯(lián)合絮凝沉淀法及砂濾技術(shù)處理模擬染料廢水能夠更加有效地去除廢水色度和COD,提高廢水處理效果。
[Abstract]:Direct dyes are the most productive dyes in the dyestuff industry. Direct dye wastewater has the characteristics of large water quantity, complex composition, high chromaticity, large change of pH and alkalinity, poor biodegradability and so on. Traditional wastewater pretreatment techniques (such as adsorption, ozone oxidation, etc.) for direct dye wastewater treatment have some shortcomings, such as poor treatment efficiency or high treatment cost. It is of great theoretical significance and social practical value to study the economic and effective pretreatment technology of direct dye wastewater. In this paper, the treatment of direct dye red wastewater was simulated. The direct dyestuff wastewater was pretreated by microelectrolysis technology. The color removal rate and COD removal rate were taken as the evaluation indexes. The optimum conditions for pretreatment of dyestuff wastewater by microelectrolysis technology were determined through many single factor experiments. The scale of wastewater treatment was expanded after the optimum conditions were determined. Aiming at the problem of yellowing of effluent color, flocculation precipitation method and sand filtration technology were used to further pre-treat the effluent after micro-electrolysis treatment to improve the treatment effect of wastewater. The results are as follows: (1) the optimum reaction conditions for the pretreatment of dye wastewater by microelectrolysis are as follows: the pH value is 1.2-1.3, the ratio of iron to carbon is 1: 1, and the dosage of iron and carbon is 45 g / L (wastewater removal rate is about 99%, COD removal rate is about 30%, and COD removal rate is about 30%.) The dye wastewater was treated by flocculation precipitation and sand filtration after pretreatment with micro-electrolysis technology. The chromaticity of effluent and the removal rate of COD can be increased to about 99.8%, and the iron removal rate of more than 99.9% in effluent can be compared with that of micro-electrolysis. The treatment of simulated dyestuff wastewater by microelectrolysis combined with flocculation precipitation and sand filtration can effectively remove the chroma and COD of the wastewater and improve the treatment effect of the wastewater.
【學(xué)位授予單位】：蘭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X788

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