本文關鍵詞： 交聯(lián)胍膠廢水 鐵碳微電解 Fenton氧化 絮凝沉淀 預處理　出處：《東北石油大學》2017年碩士論文　論文類型：學位論文

【摘要】：交聯(lián)胍膠有機廢水是油田開發(fā)過程中產(chǎn)生的一種工業(yè)廢水。廢水中含有大量的溶解性有機物、固體懸浮物、帶電膠粒、重金屬、各種無機鹽以及化學添加劑等,造成其成分復雜、COD含量高、色度高、毒害大、難降解等特點。如果不經(jīng)過處理直接外排,將會對周圍的水體環(huán)境乃至人類健康造成很大的危害。因此,有機廢水處理是工業(yè)廢水處理中亟待解決的一大難題。本實驗中以化學需氧量(COD)的變化為分析指標,研究了鐵炭微電解法和Fenton試劑氧化法的原理、特點、影響因素以及在廢水處理中的應用,并通過單因素影響試驗,確定最佳的運行參數(shù),運用正交試驗確定各影響因素的重要程度;進行了提出適合有機物降解的微電解-Fenton氧化-絮凝沉淀組合工藝法。試驗結果表明:鐵碳微電解技術的最佳操作條件為:連續(xù)通入氧的情況下原污水稀釋2倍,進水pH為3,Fe/C質(zhì)量比2:3,Fe-C總加量為50 g/L,反應時間為100 min,鐵碳微電解對廢水COD的去除率可達到54.8%左右,正交實驗結果表明,各因素對實驗結果的影響主次順序為:鐵碳投加量鐵碳質(zhì)量比反應時間pH值,鐵碳微電解工藝對該瓜膠廢水有良好的處理效果;本研究選取30%雙氧水和硫酸亞鐵作為Fenton試劑配制材料,通過單因素和正交實驗,確定了Fenton法處理瓜膠廢水的最佳操作條件為Fenton氧化最佳組合條件為pH為4,H2O2/Fe2+摩爾比為25,H2O2加量為12 ml/L且分三次加入,反應時間為80 min,COD的去除率在47.4%以上,正交實驗結果表明,各因素對實驗結果的影響主次順序為:pH值H2O2加量H2O2/Fe2+摩爾比反應時間;絮凝沉淀過程過考察了實驗考察了CPAM加量、攪拌速率、攪拌時間、反應溫度、pH值等因素對污水COD降解的影響,最終處理后污水COD由1440 mg/L降到238 mg/L,總去除率達到83.7%。最后,實驗在得出的最佳處理條件下對不同組合處理工藝路線進行對比,對實驗處理前后污水進行顯微鏡觀察和紫外-可見光吸收光譜對比分析,發(fā)現(xiàn)有機物已被很好的降解除去,水樣特征吸收峰發(fā)生藍移,在近紫外區(qū)200 nm處一直存在一個較低的肩峰,表明溶解性大分子有機物分子結構被破壞降解成無機物和一些小分子有機物,得出了微電解-Fenton氧化-絮凝沉淀組合能有效改善交聯(lián)胍膠污水水質(zhì)。
[Abstract]:The organic wastewater of crosslinked guanidine gum is a kind of industrial wastewater produced in the course of oilfield development. The wastewater contains a large amount of dissolved organic matter, solid suspended matter, charged colloid, heavy metal, various inorganic salts and chemical additives, etc. It has the characteristics of high COD content, high chromaticity, high toxicity, difficult to degrade and so on. If it is not treated directly, it will cause great harm to the surrounding water environment and even human health. Organic wastewater treatment is a difficult problem to be solved urgently in industrial wastewater treatment. The principle and characteristics of iron and carbon microelectrolysis and Fenton reagent oxidation are studied in this experiment with the change of chemical oxygen demand (COD) as the analysis index. Influence factors and their application in wastewater treatment, and through the single factor influence test, determine the best operating parameters, use orthogonal test to determine the importance of each factor; The combined process of micro-electrolysis Fenton oxidation and flocculation precipitation suitable for organic degradation was put forward. The experimental results showed that the optimum operating conditions of iron-carbon microelectrolysis were as follows: the original wastewater was diluted twice under continuous oxygen supply. When the influent pH is 3% Fe / C ratio of 2: 3% Fe-C is 50 g / L, the reaction time is 100 min, the removal rate of COD in wastewater by iron and carbon microelectrolysis can reach about 54.8%. The results of orthogonal experiment show that, The influence of various factors on the experimental results was in the following order: the weight of iron and carbon was higher than the pH value of reaction time, and the process of iron and carbon microelectrolysis had a good effect on the treatment of the melon gum wastewater; In this study, 30% hydrogen peroxide and ferrous sulfate were selected as Fenton reagents to prepare the materials. The optimum operating conditions for the treatment of melon gum wastewater by Fenton process were determined as follows: the optimal combination condition of Fenton oxidation was pH 4 / H _ 2O _ 2 / Fe _ 2 = 25% H _ 2O _ 2 = 12 ml/L, and the reaction time was 80 min. The removal rate of Fenton was more than 47.4%. The influence of various factors on the experimental results was in the following order: the molar ratio of H _ 2O _ 2 to H _ 2O _ 2 and H _ 2O _ 2 / Fe _ 2 molar ratio of H _ 2O _ 2 to H _ 2O _ 2.The flocculation and precipitation process was carried out and the addition of CPAM, stirring rate and stirring time were investigated. The effect of reaction temperature, pH and other factors on the degradation of COD in wastewater. After the final treatment, the COD of wastewater was reduced from 1 440 mg/L to 238 mg / L, and the total removal rate reached 83.7%. Finally, under the optimum treatment conditions, the different combined treatment process routes were compared. The microscopical observation and UV-Vis absorption spectra of sewage before and after treatment showed that organic compounds had been well degraded and the absorption peaks of water samples were blue shifted. There has been a lower acromial at 200 nm near ultraviolet, indicating that the molecular structure of dissolved macromolecular organic compounds is destroyed and degraded into inorganic compounds and some small molecular organic compounds. It is concluded that the combination of microelectrolysis-Fenton oxidation and flocculation precipitation can effectively improve the water quality of crosslinked guanidine gel wastewater.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：X741
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本文編號：1501983