本文選題：電鍍廢水　切入點(diǎn)：絡(luò)合態(tài)鎳　出處：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：含絡(luò)合鎳的電鍍廢水一般采用先破絡(luò)后混凝沉淀的處理方式,而破絡(luò)是該類廢水處理的關(guān)鍵。目前,工程中常用的破絡(luò)方法為芬頓法,該方法雖然操作簡(jiǎn)單,但也存在水力停留時(shí)間長(zhǎng)、處理費(fèi)用高、產(chǎn)泥量大的問(wèn)題,且出水難以穩(wěn)定達(dá)標(biāo)。目前,基于臭氧的高級(jí)氧化工藝越來(lái)越受重視。課題組在前期研究中發(fā)現(xiàn),采用臭氧催化聯(lián)用工藝“O_3/H_2O_2+Fe~(2+)”處理含次亞磷酸鹽的電鍍廢水具有良好效果,同時(shí)具有水力時(shí)間短、處理成本低、產(chǎn)泥量小等優(yōu)勢(shì)。次亞磷酸鹽與絡(luò)合鎳的去除原理接近,因此臭氧催化聯(lián)用工藝具有有效處理含絡(luò)合鎳廢水的潛力。本研究考察了芬頓和臭氧催化聯(lián)用工藝處理含絡(luò)合鎳廢水的特性,確定了合適的絡(luò)合鎳廢水處理工藝,在此基礎(chǔ)上,對(duì)該工藝進(jìn)行系統(tǒng)優(yōu)化,并以實(shí)際廢水為處理對(duì)象,進(jìn)行中試研究。通過(guò)小試試驗(yàn),對(duì)比了芬頓和臭氧催化聯(lián)用工藝對(duì)絡(luò)合鎳廢水的處理效果。實(shí)驗(yàn)結(jié)果表明,針對(duì)絡(luò)合鎳含量為50 mg/L的Ni-EDTA模擬廢水,在最佳投加量下進(jìn)行單級(jí)芬頓反應(yīng),出水鎳的含量最低達(dá)0.7 mg/L;臭氧催化聯(lián)用工藝出水鎳濃度能夠達(dá)到0.1 mg/L的排放標(biāo)準(zhǔn),但同時(shí)存在臭氧投加成本過(guò)高的問(wèn)題。通過(guò)兩種工藝的對(duì)比發(fā)現(xiàn),在高濃度模擬廢水下,芬頓工藝與臭氧催化聯(lián)用工藝相比,具有反應(yīng)速率快的優(yōu)勢(shì);而臭氧催化聯(lián)用工藝適用于低濃度絡(luò)合鎳廢水。因此,針對(duì)絡(luò)合鎳含量較高的廢水,宜采用“芬頓+臭氧催化聯(lián)用”兩段式組合,且兩種工藝之間的濃度為15 mg/L左右為宜。針對(duì)模擬廢水對(duì)“芬頓+臭氧催化聯(lián)用”組合進(jìn)行優(yōu)化可知,芬頓段出水只需達(dá)到15 mg/L以下,后續(xù)工藝可將水中鎳濃度處理至0.1 mg/L以下。因此,對(duì)兩段式高級(jí)氧化組合進(jìn)行優(yōu)化試驗(yàn)。結(jié)果表明:減少芬頓段的試劑投加量,可以將芬頓段出水鎳濃度維持在15 mg/L左右;芬頓出水不進(jìn)行加堿沉淀有利于與后續(xù)工藝的結(jié)合;芬頓工藝出水中殘留的過(guò)氧化氫可以保證后續(xù)臭氧工藝的高效運(yùn)行,同時(shí)可將臭氧催化聯(lián)用工藝中過(guò)氧化氫的投加過(guò)程進(jìn)行簡(jiǎn)化;經(jīng)過(guò)工藝對(duì)比,O_3和Fe~(2+)同時(shí)投加對(duì)處理效果具有一定的提升作用。因此,針對(duì)含絡(luò)合鎳廢水,適宜采用的工藝為“芬頓+O_3/Fe~(2+)”兩段式高級(jí)氧化工藝,并對(duì)該工藝進(jìn)行參數(shù)優(yōu)化。基于上述研究成果,考察了“芬頓+O_3/Fe~(2+)”兩段式高級(jí)氧化工藝對(duì)實(shí)際廢水的處理效果。實(shí)驗(yàn)結(jié)果表明,針對(duì)絡(luò)合鎳含量為2~20mg/L的實(shí)際廢水時(shí),該工藝經(jīng)過(guò)參數(shù)優(yōu)化,體現(xiàn)了穩(wěn)定高效的處理效果,出水鎳能穩(wěn)定達(dá)到0.1 mg/L的電鍍廢水排放標(biāo)準(zhǔn),且能同步高效去除Cu、COD和TP,去除率分別可達(dá)到93%、76%和99%。與傳統(tǒng)兩段芬頓工藝相比,該工藝處理成本節(jié)省30~50%,可以實(shí)現(xiàn)含鎳廢水高效經(jīng)濟(jì)處理的目的。
[Abstract]:The electroplating wastewater containing complexed nickel is usually treated by first breaking the complexing and then coagulating and precipitating, and breaking the complexing is the key to the treatment of this kind of wastewater.At present, Fenton method is commonly used in engineering. Although the method is simple, it also has the problems of long HRT, high treatment cost and large sludge production, and it is difficult to reach the standard of effluent stability.At present, more and more attention has been paid to the advanced oxidation process based on ozone.In the previous study, it was found that the treatment of electroplating wastewater containing hypophosphite by ozone catalytic combined process "O_3/H_2O_2 Fe~(2" had a good effect, and had the advantages of short hydraulic time, low treatment cost and low sludge production.The removal principle of hypophosphite and complexed nickel is similar, so the combined ozone catalytic process has the potential to effectively treat wastewater containing complexed nickel.In this study, the characteristics of Fenton combined with ozone catalytic process for treating nickel complex wastewater were investigated, and the suitable treatment process of nickel complex wastewater was determined. On the basis of this, the process was systematically optimized, and the actual wastewater was treated as the object.Pilot study was carried out.The effect of Fenton combined with ozone catalysis on the treatment of nickel complex wastewater was compared.The experimental results show that for the simulated wastewater of Ni-EDTA containing 50 mg/L complex nickel, single stage Fenton reaction is carried out under the optimum dosage, the lowest nickel content in effluent is 0.7 mg / L, and the effluent nickel concentration of ozone catalytic combined process can reach the discharge standard of 0. 1 mg/L.But at the same time there is the problem of excessive cost of ozone addition.By comparing the two processes, it is found that the Fenton process has the advantage of faster reaction rate compared with the ozone catalytic combined process under the high concentration simulated wastewater, while the ozone catalytic combined process is suitable for the low concentration complex nickel wastewater.Therefore, for the wastewater with high nickel complexing content, a two-stage combination of "Fenton ozone catalytic combination" and the concentration of about 15 mg/L between the two processes should be adopted.According to the optimization of "Fenton ozone catalytic combination" combination of simulated wastewater, the effluent of Fenton section only needs to be less than 15 mg/L, and the nickel concentration in water can be treated to less than 0.1 mg/L by the subsequent process.Therefore, the two-stage advanced oxidation combination was optimized.The results show that the nickel concentration in Fenton section can be maintained at about 15 mg/L by reducing the dosage of reagents in Fenton section, and that no alkali precipitation in Fenton effluent is beneficial to the combination with subsequent processes.The hydrogen peroxide residue in the effluent of the Fenton process can guarantee the efficient operation of the subsequent ozone process and simplify the addition process of hydrogen peroxide in the combined ozone catalytic process.The addition of O _ 3 and Fe~(2 at the same time can improve the treatment effect.Therefore, for the wastewater containing complexed nickel, the suitable process is "Fenton O_3/Fe~(2" two-stage advanced oxidation process, and the parameters of the process are optimized.Based on the above research results, the effect of "Fenton O_3/Fe~(2" two-stage advanced oxidation process on actual wastewater treatment was investigated.The experimental results show that when the nickel complexing content is 2~20mg/L, the process is optimized by parameters, and the effluent nickel can reach the discharge standard of 0. 1 mg/L electroplating wastewater.And the removal rate of COD and TPcould reach 9376% and 99% respectively.Compared with the traditional two-stage Fenton process, the cost of this process can be reduced by 30% and 50%, and the purpose of high efficiency and economic treatment of nickel wastewater can be realized.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X781.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 戴文燦;周發(fā)庭;;電鍍含鎳廢水治理技術(shù)研究現(xiàn)狀及展望[J];工業(yè)水處理;2015年07期

2 劉新秀;王英華;孫賢波;劉勇弟;;UV/O_3處理酒石酸-銅絡(luò)合體系廢水的研究[J];華東理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年06期

3 陳振國(guó);汪曉軍;;兩級(jí)沉淀法處理電鍍含鎳廢水[J];電鍍與涂飾;2014年21期

4 劉敏敏;于水利;侯立安;;重金屬?gòu)U水處理技術(shù)概述[J];中國(guó)工程科學(xué);2014年07期

5 張博廉;劉銳;顧寒松;操衛(wèi)平;趙繼偉;;臭氧高級(jí)氧化技術(shù)深度處理氣田鉆井廢水應(yīng)用研究[J];廣東化工;2013年20期

6 LIU Bingjie;WANG Dongfeng;YU Guangli;MENG Xianghong;;Adsorption of Heavy Metal Ions,Dyes and Proteins by Chitosan Composites and Derivatives-A Review[J];Journal of Ocean University of China;2013年03期

7 丁凱揚(yáng);周瑜;;催化濕式氧化技術(shù)研究進(jìn)展[J];廣東化工;2013年12期

8 甘枝能;姚建霞;;淺談我國(guó)電鍍廢水處理現(xiàn)狀與發(fā)展趨勢(shì)[J];廣東化工;2012年14期

9 倪曉曉;;O_3/H_2O_2高級(jí)氧化法預(yù)處理酒精廢水的實(shí)驗(yàn)研究[J];廣州化工;2012年03期

10 賈瑞平;盛敏奇;張輝;陳燁璞;;臭氧分析方法的研究和進(jìn)展[J];工業(yè)水處理;2008年02期

相關(guān)碩士學(xué)位論文 前2條

1 周倍立;臭氧/過(guò)氧化氫/亞鐵工藝去除次磷酸鹽的效能研究[D];哈爾濱工業(yè)大學(xué);2014年

2 左鳴;電鍍廢水處理工藝優(yōu)化研究[D];華南理工大學(xué);2012年

，

本文編號(hào)：1708255