膜技術(shù)在印染廢水深度處理中的工程應(yīng)用及效益分析
發(fā)布時(shí)間：2018-10-29 11:02
【摘要】：我國人均淡水量較少,隨著城鎮(zhèn)用水量劇增,水資源短缺已成為制約我國社會經(jīng)濟(jì)發(fā)展的重要因素。中水回用作為一種提高水資源重復(fù)利用率的技術(shù)手段,為緩解印染行業(yè)高水耗的特點(diǎn),越來越受到廣泛的應(yīng)用。同時(shí)國家及地方針對印染行業(yè)出臺了一系列整治措施,目前迫切要求尋找一種有效、穩(wěn)定的回用工藝用于印染生產(chǎn)企業(yè),以滿足節(jié)水、減污的目的。本論文針對印染廢水二級生化出水,采用過濾、超濾澄清和反滲透濃縮的膜集成工藝進(jìn)行深度處理后回用于生產(chǎn)過程。具體包括以下內(nèi)容：超濾試驗(yàn)中通過改變化學(xué)清洗藥劑種類和有無氣洗的調(diào)整,考察運(yùn)行工藝的穩(wěn)定性。結(jié)果顯示：在自動(dòng)氣洗的情況下投加DBNPA為最佳工況參數(shù),超濾去除了部分細(xì)小懸浮物,經(jīng)過超濾后水質(zhì)較為澄清,出水濁度降至1NTU以下,滿足反滲透進(jìn)水水質(zhì)預(yù)處理要求。通過藥劑定期的反洗,超濾膜中試的透過液流量和循環(huán)液流量穩(wěn)定通量分別為1600L/H和3100L/H,同時(shí)反洗后的通量恢復(fù)性能較好,運(yùn)行均較穩(wěn)定。反滲透系統(tǒng)在廠家設(shè)定工況條件下,連續(xù)運(yùn)行一段時(shí)間,考察系統(tǒng)的穩(wěn)定性及進(jìn)出水水質(zhì)。結(jié)果表明：反滲透工藝進(jìn)水電導(dǎo)率波動(dòng)較大,出水電導(dǎo)率波動(dòng)較��；出水電導(dǎo)率與進(jìn)水電導(dǎo)率的大小基本無關(guān),且維持在一較低水平；同時(shí)檢測其出水的COD值均達(dá)到相關(guān)回用水質(zhì)設(shè)計(jì)標(biāo)準(zhǔn)。最后對本項(xiàng)目進(jìn)行經(jīng)濟(jì)效益與環(huán)境效益分析,結(jié)果顯示：項(xiàng)目投入運(yùn)營后,每天可節(jié)省自來水2000m3,減排污染物濃度按進(jìn)水濃度計(jì),年投入使用時(shí)問為330天,年收益88.44萬元,項(xiàng)目投資償還期為5.28年,內(nèi)部收益率為10.29%,其經(jīng)濟(jì)效益顯著且風(fēng)險(xiǎn)較小。同時(shí)每年可減排廢水量66萬m3,減排CODCr132t/a、BOD533 t/a、NH3-N 13.2t/a、TP0.99t/a,其環(huán)境效益明顯,為當(dāng)?shù)毓?jié)能減排作出較大的貢獻(xiàn)。
[Abstract]:With the rapid increase of urban water consumption, the shortage of water resources has become an important factor restricting the social and economic development of our country. Reclaimed water reuse as a technical means to improve the reuse of water resources is more and more widely used in order to alleviate the characteristics of high water consumption in printing and dyeing industry. At the same time, the state and the local government have issued a series of treatment measures for the printing and dyeing industry. At present, it is urgent to find an effective and stable recycling process for printing and dyeing production enterprises, in order to meet the purpose of saving water and reducing pollution. In this paper, the membrane integrated process of filtration, ultrafiltration clarification and reverse osmosis concentration was used for advanced treatment and reuse of secondary biochemical effluent from printing and dyeing wastewater. The main contents are as follows: in the ultrafiltration test, the stability of the operation process is investigated by changing the type of chemical cleaning agent and adjusting whether there is air washing or not. The results show that under the condition of automatic air washing, adding DBNPA is the best operating condition parameter, and ultrafiltration removes some fine suspended matter. After ultrafiltration, the water quality is clarified, and the turbidity of effluent drops below 1NTU, which meets the requirement of pretreatment of reverse osmosis influent water quality. The steady flux of permeating liquid and circulating liquid were 1600L/H and 3100L / H, respectively, and the flux recovery performance after backwash was better and the operation was stable. The reverse osmosis system was operated continuously for a period of time under the conditions set by the manufacturer to investigate the stability of the system and the water quality in and out of the system. The results show that the influent conductivity of reverse osmosis process fluctuates greatly, the fluctuation of effluent conductivity is small, the effluent conductivity is independent of the influent conductivity, and it is maintained at a low level. At the same time, the COD values of the effluent reached the relevant reuse water quality design standard. Finally, the economic and environmental benefits of the project are analyzed. The results show that after the project is put into operation, the tap water can be saved 2000m3 per day, the pollutant concentration can be reduced according to the influent concentration, the annual input time is 330days, and the annual income is 884400 yuan. The repayment period of the project investment is 5.28 years and the internal rate of return is 10.29. The economic benefit is significant and the risk is small. At the same time, the amount of waste water can be reduced by 660000 m3 per year, and the amount of NH3-N13.2t / a TP0.99t / a is reduced by CODCr132t/a,BOD533 t / a / N13.2t / a / a, which has obvious environmental benefits and makes a great contribution to local energy saving and emission reduction.
【學(xué)位授予單位】：浙江工商大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X791
本文編號：2297512
[Abstract]:With the rapid increase of urban water consumption, the shortage of water resources has become an important factor restricting the social and economic development of our country. Reclaimed water reuse as a technical means to improve the reuse of water resources is more and more widely used in order to alleviate the characteristics of high water consumption in printing and dyeing industry. At the same time, the state and the local government have issued a series of treatment measures for the printing and dyeing industry. At present, it is urgent to find an effective and stable recycling process for printing and dyeing production enterprises, in order to meet the purpose of saving water and reducing pollution. In this paper, the membrane integrated process of filtration, ultrafiltration clarification and reverse osmosis concentration was used for advanced treatment and reuse of secondary biochemical effluent from printing and dyeing wastewater. The main contents are as follows: in the ultrafiltration test, the stability of the operation process is investigated by changing the type of chemical cleaning agent and adjusting whether there is air washing or not. The results show that under the condition of automatic air washing, adding DBNPA is the best operating condition parameter, and ultrafiltration removes some fine suspended matter. After ultrafiltration, the water quality is clarified, and the turbidity of effluent drops below 1NTU, which meets the requirement of pretreatment of reverse osmosis influent water quality. The steady flux of permeating liquid and circulating liquid were 1600L/H and 3100L / H, respectively, and the flux recovery performance after backwash was better and the operation was stable. The reverse osmosis system was operated continuously for a period of time under the conditions set by the manufacturer to investigate the stability of the system and the water quality in and out of the system. The results show that the influent conductivity of reverse osmosis process fluctuates greatly, the fluctuation of effluent conductivity is small, the effluent conductivity is independent of the influent conductivity, and it is maintained at a low level. At the same time, the COD values of the effluent reached the relevant reuse water quality design standard. Finally, the economic and environmental benefits of the project are analyzed. The results show that after the project is put into operation, the tap water can be saved 2000m3 per day, the pollutant concentration can be reduced according to the influent concentration, the annual input time is 330days, and the annual income is 884400 yuan. The repayment period of the project investment is 5.28 years and the internal rate of return is 10.29. The economic benefit is significant and the risk is small. At the same time, the amount of waste water can be reduced by 660000 m3 per year, and the amount of NH3-N13.2t / a TP0.99t / a is reduced by CODCr132t/a,BOD533 t / a / N13.2t / a / a, which has obvious environmental benefits and makes a great contribution to local energy saving and emission reduction.
【學(xué)位授予單位】：浙江工商大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X791
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2 田晴;肖玉男;陳季華;;生物活性炭法深度處理紡織廢水二級出水中生物活性的研究[J];環(huán)境污染治理技術(shù)與設(shè)備;2006年03期
相關(guān)博士學(xué)位論文 前1條
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，本文編號：2297512
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