本文選題：電子電鍍 + 高COD　； 參考：《南昌航空大學(xué)》2017年碩士論文

【摘要】：電子電鍍行業(yè)生產(chǎn)過(guò)程中會(huì)產(chǎn)生大量既含高濃度有機(jī)物、又含重金屬的混合廢水。目前單一COD廢水和單一重金屬?gòu)U水的處理研究報(bào)道比較多,但同時(shí)對(duì)含有兩者的廢水處理研究卻較少。針對(duì)這種現(xiàn)狀,本論文從某電子線路板企業(yè)現(xiàn)場(chǎng)調(diào)研出發(fā),得出廢水污染源主要來(lái)自銅板刷磨、化學(xué)鍍銅鍍鎳、微蝕酸洗和退膜等工序,通過(guò)對(duì)公司進(jìn)行一個(gè)月的水質(zhì)監(jiān)測(cè),發(fā)現(xiàn)綜合廢水中總銅濃度范圍在53.80~140.94 mg/L之間、總鎳濃度在0.199~9.602 mg/L之間、COD濃度在1113.42mg/L~2490.16 mg/L之間,屬于典型的高濃度COD銅鎳混合廢水。對(duì)此分別采用臭氧光催化法、中和沉淀法、鐵碳微電解法處理該廢水,考察單一工藝方法的去除效果,并得出各個(gè)工藝的最佳參數(shù),通過(guò)實(shí)驗(yàn)研究表明:(1)臭氧光催化法降解廢水COD時(shí),控制條件為:pH=3、臭氧流量在70mg/min、UV紫外光照射時(shí)間在70 min、雙氧水投加量為70 ml/L,結(jié)果表明廢水中COD濃度從1691.87 mg/L降低至200.19 mg/L,去除率達(dá)到88.17%。(2)中和沉淀法處理有機(jī)物銅鎳混合廢水時(shí),pH=9為最佳工藝參數(shù),此時(shí)Cu2+的濃度從102.35 mg/L降低至3.38 mg/L,去除率為96.70%;Ni2+的濃度從9.24mg/L降低至0.77 mg/L,去除率為91.67%;COD的濃度從1691.87 mg/L降低至1258.23 mg/L,去除率為25.63%。(3)鐵碳微電解法處理有機(jī)物銅鎳混合廢水時(shí),分別設(shè)計(jì)了單因素實(shí)驗(yàn)和正交實(shí)驗(yàn),結(jié)果表明對(duì)Cu2+去除的最佳工藝條件為:pH值為4、鐵屑投加量為55g/L、鐵碳質(zhì)量比為1/1、反應(yīng)時(shí)間為80 min,Cu2+濃度從102.35 mg/L降低至2.61mg/L,去除率為97.45%;對(duì)Ni2+去除的最佳工藝條件為:pH值為4、鐵屑投加量為50 g/L、鐵碳質(zhì)量比為1/1、反應(yīng)時(shí)間為80 min,Ni2+濃度從9.24 mg/L降低至1.03 mg/L,去除率為88.85%。可以看出臭氧光催化法對(duì)COD、中和沉淀和鐵碳微電解法對(duì)銅鎳離子,都有良好的去除效果,但是都無(wú)法同時(shí)使廢水中COD和銅鎳離子達(dá)到排放標(biāo)準(zhǔn)。因此本文最后結(jié)合各單一工藝確定的最佳處理?xiàng)l件,確定了“臭氧光催化/微電解中和”的組合工藝,對(duì)高濃度COD銅鎳混合廢水進(jìn)行處理研究。最終使廢水中Cu2+濃度從102.35 mg/L降至0.46 mg/L、去除率為99.55%,Ni2+濃度從9.24 mg/L降至0.39 mg/L、去除率為95.78%,COD濃度從1691.87 mg/L降至172.56 mg/L、去除率為89.80%。結(jié)果表明“臭氧光催化/微電解中和”組合工藝在最佳的實(shí)驗(yàn)條件下,對(duì)高濃度COD銅鎳混合廢水進(jìn)行處理時(shí),達(dá)到了本課題研究的目的。
[Abstract]:A large amount of mixed wastewater containing both high concentration of organic matter and heavy metal will be produced in the production process of electronic electroplating industry. At present, there are many reports on the treatment of single COD wastewater and single heavy metal wastewater, but there are few researches on the treatment of wastewater containing both of them at the same time. In view of this situation, based on the field investigation of an electronic circuit board enterprise, this paper draws the conclusion that the pollution source of wastewater mainly comes from the processes of copper brushing, electroless copper plating and nickel plating, micro-etching acid washing and film removal, etc. Through the monitoring of the water quality of the company for one month, It was found that the concentration of total copper in the wastewater ranged from 53.80 to 140.94 mg/L, and the concentration of total nickel between 0.199 and 9.602 mg/L was found to be in the range of 1113.42mg/L~2490.16 mg/L, which was a typical high concentration COD copper-nickel mixed wastewater. The wastewater was treated by ozone photocatalytic method, neutralization precipitation method and iron-carbon micro-electrolysis method respectively. The removal effect of the single process was investigated, and the optimum parameters of each process were obtained. The experimental results show that COD is degraded by ozone photocatalytic method. The results showed that the concentration of COD in wastewater decreased from 1691.87 mg/L to 200.19 mg / L, and the removal rate reached 88.17% 路L ~ (-1). The optimum technological parameters were pH 9. At this time, the concentration of Cu2 was reduced from 102.35 mg/L to 3.38 mg / L, the removal rate of 96.70% Ni2 was reduced from 9.24mg/L to 0.77 mg / L, the concentration of Cu2 was reduced from 1691.87 mg/L to 1258.23 mg / L, and the removal rate was 25.63%. Single factor experiment and orthogonal experiment were designed respectively. The results show that the optimum process conditions for Cu2 removal are as follows: the pH value is 4, the iron chip dosage is 55g / L, the iron-carbon mass ratio is 1 / 1, the reaction time is 80 mg/L and the concentration of Cu2 is reduced from 102.35 mg/L to 2.61 mg / L, and the removal rate is 97.45%. 4, the amount of iron scraps is 50 g / L, the ratio of iron to carbon is 1 / 1, and the reaction time is 80 mg/L. The concentration of Ni2 is reduced from 9.24 mg/L to 1.03 mg / L, and the removal rate is 88.85. It can be seen that the ozone photocatalytic method has a good effect on the removal of copper-nickel ions from COD, neutralization precipitation and iron-carbon micro-electrolysis, but neither of them can make the COD and Cu-Ni ions in the wastewater meet the discharge standard at the same time. Therefore, the combined process of "ozone photocatalysis / micro-electrolysis neutralization" was determined according to the optimal treatment conditions determined by each single process, and the treatment of high concentration COD copper-nickel mixed wastewater was studied. Finally, the Cu2 concentration in the wastewater was reduced from 102.35 mg/L to 0.46 mg / L, the removal rate was 99.55% from 9.24 mg/L to 0.39 mg / L, the removal rate was 95.78% from 1691.87 mg/L to 172.56 mg / L, and the removal rate was 89.80%. The results show that the combined process of "ozone photocatalysis / micro electrolysis neutralization" can achieve the purpose of this research when the mixed wastewater of high concentration COD copper and nickel is treated under the optimum experimental conditions.
【學(xué)位授予單位】：南昌航空大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：X781.1

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