本文選題：涂裝廢水 + 物化處理法��； 參考：《大連海事大學(xué)》2015年碩士論文

【摘要】：涂裝工藝在汽車表面處理中運用極其廣泛,我國汽車涂裝廢水主要采用磷化處理,產(chǎn)生污水中磷酸鹽含量較多,對環(huán)境污染嚴(yán)重。隨著人民日益提升的生產(chǎn)、生活需求及汽車產(chǎn)業(yè)的蓬勃發(fā)展,汽車企業(yè)生產(chǎn)過程中排放的廢水量逐年增多,對環(huán)境的污染與日俱增。尤其汽車生產(chǎn)工藝過程中排放的高濃度倒槽廢水,其污染物質(zhì)種類多、濃度高,處理難度大。汽車產(chǎn)業(yè)廢水的處理已成為當(dāng)今污水處理工程的重要課題。通過多年的摸索和工程實踐,發(fā)現(xiàn)采用物化加生化處理汽車涂裝廢水是經(jīng)濟有效的,但在實際的應(yīng)用中也存在一些問題,需要對此工藝進行優(yōu)化和改進,使汽車涂裝廢水處理更加穩(wěn)定和有效。主要針對某汽車生產(chǎn)企業(yè)生產(chǎn)過程中產(chǎn)生的涂裝高濃度廢水物化處理藥劑的選擇展開研究。確定某企業(yè)高濃度汽車涂裝廢水最佳反應(yīng)pH條件為11；選用氯化鈣與氫氧化鈉混合藥劑對涂裝廢水中Ni及磷酸鹽去除率效果良好,最佳反應(yīng)加藥量為氫氧化鈉0.4kg/t廢水,氯化鈣0.8kg/t廢水；成本為3.72元/t廢水。使用氫氧化鈉與氫氧化鈣混合藥劑投加對磷化廢水進行處理,原理上可行,效果良好,最佳反應(yīng)投藥配比為1：4；最佳加藥量為氫氧化鈉0.048kg/t,氫氧化鈣的投加量為0.48kg/t,單噸廢水藥劑處理成本為1.57元/t廢水。并在此基礎(chǔ)上得出最佳反應(yīng)加藥量為聚合氯化鋁0.15kg/t,聚丙烯酰胺2.5×10-3kg/t。最終得出優(yōu)化藥劑選擇為氫氧化鈉與氫氧化鈣混合藥劑投加并使用PAC、PAM輔助絮凝的方法處理高濃度涂裝廢水。處理后出水磷酸鹽≤0.5mg/L,達到國家《污水綜合排放標(biāo)準(zhǔn)》中的一級排放標(biāo)準(zhǔn)；單噸廢水成本為1.49 元/t廢水。較原處理藥劑的成本2.33元/t節(jié)省了0.84元/t。研究成果可為企業(yè)污水處理降低成本和同類廢水物化處理藥劑的選擇提供參考。
[Abstract]:Coating process is widely used in automobile surface treatment. Phosphating treatment is mainly used in automobile painting wastewater in our country, which produces more phosphate in sewage and causes serious environmental pollution. With the increasing production of people, the demand of life and the vigorous development of automobile industry, the amount of waste water discharged in the production process of automobile enterprises is increasing year by year, and the pollution to the environment is increasing day by day. In particular, the high concentration inverted tank wastewater discharged in the process of automobile production has many kinds of pollutants and high concentration, so it is difficult to treat. The treatment of automobile industry wastewater has become an important subject of sewage treatment engineering. After many years of exploration and engineering practice, it is found that it is economical and effective to treat automobile painting wastewater with physicochemical and biochemical treatment, but there are some problems in practical application, which need to be optimized and improved. The treatment of automobile coating wastewater is more stable and effective. This paper focuses on the selection of physicochemical agents for the treatment of high concentration wastewater from an automobile production enterprise. The optimum reaction pH condition of high concentration automobile painting wastewater is determined to be 11, the removal efficiency of Ni and phosphate in painting wastewater is good by using mixed reagent of calcium chloride and sodium hydroxide, and the best reaction amount is sodium hydroxide 0.4kg/t wastewater. Calcium chloride 0.8kg/t wastewater; cost 3.72 yuan / t wastewater. Sodium hydroxide and calcium hydroxide are used to treat phosphating wastewater. The principle is feasible and the effect is good. The best ratio of reaction is 1: 4; The optimum dosage of sodium hydroxide is 0.048 kg / t, the dosage of calcium hydroxide is 0.48 kg / t, and the cost of single ton wastewater treatment is 1.57 yuan / t. On the basis of these results, the optimum dosages were obtained as follows: polyaluminium chloride 0.15 kg / t, polyacrylamide 2.5 脳 10 -3 kg / t. Finally, it is concluded that the optimal reagent is the mixture of sodium hydroxide and calcium hydroxide and the PACPAM assisted flocculation method is used to treat the high concentration coating wastewater. The phosphate of treated effluent is less than 0.5 mg / L, which meets the first class discharge standard of the National Comprehensive Wastewater discharge Standard, and the cost of single ton wastewater is 1.49 yuan / t wastewater. The cost of the original treatment was 2.33 yuan / t saving 0.84 yuan / t. The research results can provide a reference for reducing the cost of wastewater treatment and the selection of physicochemical agents for the same kind of wastewater treatment.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X703

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