【摘要】：乳化液廢水是一種高濃度、難處理、風(fēng)險(xiǎn)大,排入環(huán)境會(huì)造成嚴(yán)重后果的危險(xiǎn)廢物,上�；^(qū)某危廢資源化處理企業(yè)通過物化-生化組合工藝集中處理乳化液廢水,出水無法滿足《上海市地方標(biāo)準(zhǔn)污水綜合排放標(biāo)準(zhǔn)》(DB31/199-2009)規(guī)定的二級(jí)排放標(biāo)準(zhǔn)的要求,本文選用該企業(yè)乳化液生化尾水為研究對(duì)象,研究臭氧高級(jí)氧化及其聯(lián)用技術(shù),對(duì)其進(jìn)行深度處理,通過小試研究探索單獨(dú)03高級(jí)氧化工藝及03/H202聯(lián)用高級(jí)氧化工藝對(duì)生化尾水有機(jī)物的處理效果及最優(yōu)工況條件；并從處理出水有機(jī)物濃度、可生化性變化、有機(jī)成分組成變化等多角度比較兩種高級(jí)氧化工藝；并初步確定適用于乳化液生化尾水處理的最優(yōu)工藝。結(jié)果表明：兩種高級(jí)氧化工藝對(duì)水中有機(jī)物和色度均有較好的去除效果,以CODcr、 TOC等作為評(píng)價(jià)指標(biāo),得出03高級(jí)氧化工藝和03/H202聯(lián)用高級(jí)氧化工藝最優(yōu)反應(yīng)pH分別為7和11；最佳臭氧的出氣流量均為0.5L/min,該流量條件下,臭氧投加速率分別為30mg/min和31mg/min; O3/H2O2聯(lián)用高級(jí)氧化工藝中,n[H2O2]/n[O3]的最優(yōu)投加摩爾比為0.5,H2O2的最優(yōu)投加方式為間歇式投加；在各自最佳處理?xiàng)l件下,單獨(dú)O3高級(jí)氧化工藝處理時(shí)間進(jìn)行到300min時(shí),出水CODcr、TOC濃度分別為200.6mg/L、103.6mg/L,仍未達(dá)到排放標(biāo)準(zhǔn)要求,處理效率不高,需進(jìn)一步處理,而03/H202聯(lián)用高級(jí)氧化工藝處理時(shí)間進(jìn)行到120min時(shí),出水CODcr、TOC濃度分別為82.3mg/L,28.7mg/L,已滿足排放標(biāo)準(zhǔn)要求。從多角度分析比較單獨(dú)O3高級(jí)氧化工藝和03/H202聯(lián)用高級(jí)氧化工藝的結(jié)果可以看出,在一定的反應(yīng)時(shí)間內(nèi),兩種工藝出水pH隨反應(yīng)時(shí)間的變化規(guī)律不同,前者出水pH一直下降,pH總小于4,不在達(dá)標(biāo)標(biāo)準(zhǔn)規(guī)定的范圍內(nèi),而后者先下降后上升,pH在7-9之間,滿足出水pH達(dá)標(biāo)排放要求；在反應(yīng)進(jìn)行過程中,前者臭氧利用率要低于后者；兩種高級(jí)氧化工藝都能在反應(yīng)前期提高出水可生化性,但是后者對(duì)CODcr和BOD5的去除率都較高；前者出水中有機(jī)物成分以環(huán)烷烴、烯烴和羧酸類等分子量較大,成分復(fù)雜的有機(jī)物為主,后者出水有機(jī)物不論是分子量還是復(fù)雜程度都比前者小,出水有機(jī)成分以直鏈烷烴和小分子烯烴為主。從最優(yōu)工況及多角度分析對(duì)比效果來看,03/H202聯(lián)用高級(jí)氧化工藝優(yōu)于單獨(dú)03高級(jí)氧化工藝。通過O3/H2O2聯(lián)用高級(jí)氧化工藝連續(xù)處理乳化液生化尾水,發(fā)現(xiàn)該技術(shù)廣泛適用于該企業(yè)每日不同的乳化液生化尾水,03/H202聯(lián)用高級(jí)氧化工藝在難處理有機(jī)物的深度處理領(lǐng)域有一定的突破,適用于乳化液生化尾水的深度處理。
[Abstract]:Emulsion wastewater is a kind of hazardous waste with high concentration, difficult treatment and high risk, which can cause serious consequences in the environment. A hazardous waste resource treatment enterprise in Shanghai chemical industry area can concentrate the emulsified wastewater through the physicochemical biochemical combination process. The effluent can not meet the standard of "the comprehensive discharge standard of Shanghai local standard sewage" (DB31/199-2009) two. In this paper, the biochemical tail water of the emulsion was selected as the research object. The advanced oxidation of ozone and its combined technology were studied. The treatment of the 03 advanced oxidation process and the advanced oxidation process of 03/H202 combined with the advanced oxidation process and the optimal conditions were studied. At the same time, two advanced oxidation processes were compared from various angles, such as the concentration of organic matter in the effluent, the changes of biodegradability and the composition of organic components, and the optimum process for the treatment of the biochemical tail water of the emulsion was preliminarily determined. The results showed that the two advanced oxidation processes had good removal effect on the organic matter and chromaticity in the water, with CODcr, TOC and so on. As the evaluation index, the optimal reaction pH of 03 advanced oxidation process and 03/H202 combined advanced oxidation process is 7 and 11, respectively, and the optimum ozone discharge flow is 0.5L/min. Under this flow rate, the acceleration rate of ozone is 30mg/min and 31mg/min respectively. In O3/H2O2 combined advanced oxidation process, the optimal dosage of n[H2O2]/n[O3] is 0.5, The optimal adding mode of H2O2 is batch adding; under the best treatment conditions of each O3, the effluent CODcr, TOC concentration is 200.6mg/L, 103.6mg/L, and the treatment efficiency is not high, the treatment efficiency is not high, and the treatment time of the advanced oxidation process is not high, while 03/H202 combined with advanced oxidation process treatment time. When 120min was carried out, the effluent CODcr and TOC concentration were 82.3mg/L, 28.7mg/L, respectively, which met the requirements of the emission standard. From the multi angle analysis, the results of the separate O3 advanced oxidation process and the advanced oxidation process of 03/H202 combined with 03/H202 can be found that the variation of the two process effluent pH with the reaction time is different in a certain reaction time. The former effluent P is p H has been decreasing, pH is less than 4, not within the range of standard standard, and the latter descends first and then rises, and pH is 7-9 to meet the discharge requirements of the effluent pH standard; in the process of the reaction, the former ozone utilization rate is lower than that of the latter; the two advanced oxidation processes can improve the biodegradability of the effluent at the early stage, but the latter is to CODcr and the latter. The removal rate of BOD5 is high. The organic compounds in the former are large in naphthenic, alkene and carboxylic acids, and the complex organic compounds are the main components. The organic matter in the effluent is smaller than the former, and the organic components in the effluent are mainly alkane and small molecular olefin. From the optimal conditions and multi angles. The analysis and contrast results show that the 03/H202 combined advanced oxidation process is superior to the single 03 advanced oxidation process. Through the O3/H2O2 combined advanced oxidation process, the biochemical tail water of the emulsion is continuously treated. It is found that the technology is widely applicable to the daily biochemical tail water of the emulsified liquid in this enterprise, and the advanced oxidation process of 03/H202 is used in the depth of the refractory organic matter. There is a breakthrough in the field of treatment, which is suitable for advanced treatment of emulsion biochemical tail water.
【學(xué)位授予單位】：華東師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：X703

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