本文關(guān)鍵詞： 復(fù)合絮凝劑 制備 印染廢水 COD 脫色　出處：《山東理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著國家對水質(zhì)問題的關(guān)注,廢水的處理成為環(huán)境問題的難題。印染廢水水量大、成份復(fù)雜、有機物含量高、并且大部分水質(zhì)無法生物降解,印染廢水處理技術(shù)成為廢水處理的瓶頸之一,現(xiàn)階段國內(nèi)紡織一般采用“強化厭氧水解+生物化學(xué)處理+混凝沉淀過濾”的組合工藝對廢水進行處理,其中COD、SS等指標得到較好控制,但出水色度卻很難能達到國家標準要求。本文從印染廢水脫色出發(fā),在充分文獻調(diào)研的基礎(chǔ)上合成并改一種多功效的新型有機-無機復(fù)合絮凝劑。首先以雙氰胺、甲醛為主要原料,氯化銨為催化劑(分批加入),合成絮凝劑A,優(yōu)化催化劑投加量以確定最佳反應(yīng)時間。其次,加入硫酸鋁(飽和溶液)和硫酸亞鐵,結(jié)合污水處理預(yù)期指標,確定最佳合成工藝條件。固定雙氰胺:甲醛:催化劑:硫酸鋁的摩爾比為1:1.5:0.57:0.2,亞鐵離子加入的質(zhì)量分數(shù)為1.5%,80℃反應(yīng)2h得到淡黃色、透明、粘稠的液體復(fù)合絮凝劑B。絮凝劑B對廢水的COD、磷去除率分別為65.5%、82.6%,酸性水質(zhì)及堿性水質(zhì)的脫色率分別達到80.5%和90.0%以上。紅外光譜顯示復(fù)合絮凝劑B中含有大量胺鹽基。胺鹽基可與廢水絕大部分色素中的磺酸基發(fā)生反應(yīng),亞鐵離子的存在使染料分子更容易結(jié)合反應(yīng),增加的鋁離子以聚合態(tài)存在,在絮凝過程中具有很強的吸附和中和作用,,有效降低了廢水污染因子降解對傳統(tǒng)絮凝劑的大分子量要求。
[Abstract]:With the national attention to the quality problem, the problem has become an environmental problem of wastewater treatment. The printing and dyeing wastewater water, complex composition, high organic content, and most of water can not be biodegradable, printing and dyeing wastewater treatment technology has become one of the bottlenecks of wastewater treatment, the domestic textile generally use the "combined process of anaerobic hydrolysis + enhanced biological treatment + coagulation sedimentation filtration" treatment of wastewater COD, SS and other indicators have been well controlled, but the color is difficult to meet the national standard requirements. The decolorization of dyeing wastewater, a new type of inorganic organic composite flocculant based on the literature research on the synthesis and modification of a multi function. First, with dicyandiamide and formaldehyde as main raw material, ammonium chloride as catalyst (batch addition), synthetic flocculant A, optimization of catalyst dosage to determine the optimum reaction time. Secondly, adding Aluminum sulfate (saturated solution) and ferrous sulfate, combined with sewage treatment is expected index, the optimum synthesis conditions. Fixed dicyandiamide: formaldehyde: Catalyst: molar ratio of aluminum sulfate was 1:1.5:0.57:0.2, the mass fraction of ferrous ions added is 1.5%, 80 DEG C 2H was light yellow, transparent, liquid viscous B. composite flocculant flocculant B on the COD of the wastewater, phosphorus removal rate were 65.5%, 82.6%, water and alkaline water decolorization rate reached 80.5% and 90% respectively. The infrared spectra showed that B composite flocculant containing large amounts of ammonium salt and ammonium salt. The vast majority of wastewater in the pigment sulfonic acid reaction of ferrous ions to exist more dye molecules easy binding reaction, aluminum ions to increase the polymerization state which has strong adsorption and neutralization, flocculation process, effectively reducing the pollution factor degradation of traditional flocculant Large molecular weight requirements.

【學(xué)位授予單位】：山東理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X791

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本文編號：1503001