本文選題：造紙廢水 + Fenton�。� 參考：《鄭州大學(xué)》2015年碩士論文

【摘要】：目前造紙廢水主要采用比較成熟的“物化+生化”處理工藝,但隨著國家對污染物排放標(biāo)準(zhǔn)的不斷提升,出水越來越難以達標(biāo)排放,亟需探索出處理效果良好又經(jīng)濟可行的深度處理方法。本論文采用“Fenton流化床+混凝沉淀”組合工藝對造紙廢水進行深度處理研究,造紙廢水取自新密市造紙群工業(yè)污水處理廠收集的來自于周邊多家造紙企業(yè)經(jīng)內(nèi)部污水站處理后排入的混合廢水。論文中還闡述了造紙廢水的來源與深度處理的必要性,并對相關(guān)深度處理技術(shù)研究進展進行介紹。首先,采用Fenton流化床深度處理造紙廢水,通過單因素試驗和曲面響應(yīng)分析,得出影響因素之間的顯著關(guān)系為:進水p H值H2O2的投加量載體填充率[H2O2]/[Fe2+]摩爾比反應(yīng)時間。運用Box-Behnken設(shè)計對去除指標(biāo)COD的去除率和影響因素之間建立二次擬合方程,其相關(guān)系數(shù)的平方為0.937,表明擬合模型精度很高。此后進行優(yōu)化分析,得出理論最佳運行條件為:初始p H值為3.6,H2O2的投加量為1.52 ml/L,載體填充率為28.8%,[H2O2]/[Fe2+]摩爾為4.86,反應(yīng)時間為58min,在此條件下運行后預(yù)測的COD去除率為74.8%;通過重復(fù)試驗得出,實際的COD去除率為72.4%,與預(yù)測值相對偏差3.14%,表明曲面響應(yīng)分析對運行條件優(yōu)化和COD去除效率的預(yù)測較為準(zhǔn)確。此后進行對比試驗得出,Fenton流化床添加有覆膜鐵氧化物的石英砂載體后,COD的去除效率較傳統(tǒng)Fenton反應(yīng)提升15.8%。然后對Fenton流化床出水進行混凝沉淀試驗,當(dāng)控制反應(yīng)條件為:初始p H值為7.0,質(zhì)量分?jǐn)?shù)為0.1%的PAM投加量為1.2ml/L時,COD和色度的去除效率分別為21.5%和69.3%。本論文研究對即將開展的實際工程建設(shè)具有一定的理論指導(dǎo)作用,同時對工業(yè)廢水深度處理的工藝選擇方面提供相關(guān)的技術(shù)參考。
[Abstract]:At present, papermaking wastewater is mainly treated by "physical, chemical and biochemical" treatment process. However, with the continuous improvement of the national standards for pollutant discharge, the effluent is becoming more and more difficult to meet the discharge standard. It is urgent to explore an effective and economical advanced treatment method. In this paper, the advanced treatment of papermaking wastewater was studied by "Fenton Fluidized bed Coagulation sedimentation" process. The papermaking wastewater is collected from the industrial wastewater treatment plant of Xinmi papermaking group. It comes from the mixed wastewater discharged by several paper making enterprises in the surrounding area after being treated by the internal sewage station. The source of papermaking wastewater and the necessity of advanced treatment are also discussed in this paper, and the research progress of related advanced treatment technology is also introduced. Firstly, Fenton fluidized bed was used for advanced treatment of papermaking wastewater. By single factor test and surface response analysis, the significant relationship between the influencing factors was obtained: the reaction time of carrier filling rate [H2O2] / [Fe2] molar ratio of influent pH value H2O2 was obtained. The quadratic fitting equation between the removal rate of COD and the influencing factors is established by using Box-Behnken design. The square of the correlation coefficient is 0.937, which indicates that the precision of the fitting model is very high. After that, the optimization analysis was carried out. The optimal operating conditions are as follows: the initial pH value of 3.6N H _ 2O _ 2 is 1.52 ml / L, the carrier filling rate is 28.885, the mole of [H2O2] / [Fe2] is 4.86, the reaction time is 58min, and the predicted COD removal rate is 74.8% after running under this condition. The actual COD removal rate is 72.4, which is 3.14 relative deviation from the predicted value, which indicates that the surface response analysis is more accurate in predicting the operation conditions optimization and COD removal efficiency. The results show that the removal efficiency of Fenton in Fenton fluidized bed is 15. 8% higher than that in traditional Fenton reaction after adding quartz sand carrier with coated iron oxide. Then the coagulation sedimentation test was carried out on the effluent of Fenton fluidized bed. When the initial pH value was 7.0 and the dosage of PAM 0.1% by mass fraction was 1.2ml/L, the removal efficiency of PAM and chromaticity were 21.5% and 69.3%, respectively. The research in this paper has a certain theoretical guidance function for the actual engineering construction to be carried out, and provides relevant technical reference for the process selection of advanced treatment of industrial wastewater at the same time.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X793

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本文編號：1975294