本文選題：高級氧化技術(shù) + TRO　； 參考：《大連海事大學(xué)》2013年碩士論文

【摘要】：水是人類賴以生存的資源,尤其飲用水的安全會對人體健康產(chǎn)生直接影響。在水污染日趨嚴重的形勢下,目前常規(guī)的飲用水處理技術(shù)對飲用水的處理往往存在微生物殺滅效果難以達標、消毒劑本身對健康產(chǎn)生危害、消毒反應(yīng)產(chǎn)生二次污染等眾多問題,生活飲用水安全難以得到保障。高級氧化技術(shù)(Advanced Oxidation Technologies, AOT)是利用活性極強的羥基自由基(Hydroxyl Radical,-OH)分解水中有害物質(zhì)的新型氧化技術(shù)。該技術(shù)具有廣譜殺菌特性,殺滅微生物的速度極快,同時不會產(chǎn)生消毒副產(chǎn)物和二次污染,是理想的新一代飲用水消毒技術(shù)。目前高級氧化技術(shù)在飲用水處理方面的研究大多只局限于理論研究階段,缺乏規(guī)�；膶嶒炑芯�,本論文從實際應(yīng)用方向出發(fā),通過建立飲用水高級氧化處理實驗系統(tǒng),研究了高級氧化技術(shù)在飲用水處理中的最佳應(yīng)用條件,為高級氧化技術(shù)在飲用水消毒滅菌領(lǐng)域的應(yīng)用提供了實驗依據(jù)。 本研究以處理量為1t/h的飲用水高級氧化處理實驗系統(tǒng)為平臺,通過對原料氣體流量、功率調(diào)節(jié)方式和處理工藝系統(tǒng)的不斷優(yōu)化與改進,建立了一套較為完善的工藝實驗裝置。在不同的反應(yīng)路徑、反應(yīng)時間和活性氧自由基濃度下對不同水質(zhì)狀況的人工配水和天然水體進行滅菌處理,得到以下結(jié)果： 1.基于高級氧化技術(shù)的飲用水消毒滅菌方法能夠滿足飲用水消毒滅菌的需求。在人工配水實驗中,當總氧化劑(TRO)濃度為0.7mg/L時,對細菌濃度為104～106cfu/mL的人工配水進行處理,殺滅率均可達到100%；對細菌濃度為105cfu/mL,濁度為1-3NTU或總有機碳(TOC)為0.279-2.65mg/L的人工配水進行處理,殺滅率也可達100%。在天然水體實驗中,當TRO濃度為1.2mg/L時,對水質(zhì)狀況最差的7月份水源水進行處理,各項微生物指標能夠達到國標要求； 2.同常規(guī)方法相比較,基于高級氧化技術(shù)的飲用水處理方法具有更快的消毒火菌速度。在對天然水體的處理中,氯、二氧化氯消毒技術(shù)一般需要維持消毒劑濃度在1.5mg/L左右,接觸時間在20min以上時才能達到較好的滅菌效果,而高級氧化技術(shù)在TRO濃度為1.2mg/L時,僅需1min左右的反應(yīng)時間即可使符項微生物指標達到國標要求； 3.水體的濁度和有機物濃度會對活性氧自由基的殺菌效果產(chǎn)生影響,其中有機物濃度對其影響最為嚴重。因此,在飲用水高級氧化技術(shù)消毒滅菌處理中,可通過增加過濾、微絮凝等前處理工藝,有效降低水體的濁度和有機物濃度,可大幅提高高級氧化技術(shù)對飲用水的消毒滅菌效果。
[Abstract]:Water is a resource for human survival, especially the safety of drinking water will have a direct impact on human health.Under the situation of water pollution becoming more and more serious, there are many problems in the treatment of drinking water by the conventional drinking water treatment technology, such as the microorganism killing effect is difficult to reach the standard, the disinfectant itself is harmful to health, the disinfection reaction produces the secondary pollution and so on.The safety of drinking water is difficult to guarantee.Advanced Oxidation Technologies (AOT) is a new oxidation technology for the decomposition of harmful substances in water using highly active hydroxyl radical hydroxy radical Hydroxyl Radicala-OH.This technology has broad spectrum bactericidal property, the speed of killing microorganism is extremely fast, at the same time will not produce disinfection by-products and secondary pollution, so it is an ideal new generation of drinking water disinfection technology.At present, the research of advanced oxidation technology in drinking water treatment is limited to the stage of theoretical research, lacking of large-scale experimental research. In this paper, the experimental system of advanced oxidation treatment of drinking water is established from the practical application direction.The optimum application conditions of advanced oxidation technology in drinking water treatment were studied, which provided experimental basis for the application of advanced oxidation technology in the field of disinfection and sterilization of drinking water.Based on the experimental system of advanced oxidation treatment of drinking water with 1t/h as the processing capacity, a set of perfect experimental equipment was set up through the optimization and improvement of the flow rate of raw gas, the mode of power regulation and the treatment process system.Under different reaction paths, reaction time and the concentration of reactive oxygen free radicals, the artificial and natural water bodies with different water quality conditions were sterilized, and the following results were obtained:1.The method of disinfection and sterilization of drinking water based on advanced oxidation technology can meet the need of disinfection and sterilization of drinking water.In the artificial water distribution experiment, when the concentration of total oxidant Tro is 0.7mg/L, the killing rate of artificial water with bacterial concentration of 104~106cfu/mL can reach 100%, and the artificial water with bacterial concentration of 105 cfur / mL, turbidity of 1-3NTU or total organic carbon (TOC) as 0.279-2.65mg/L is treated.The killing rate can also reach 100.In the natural water experiment, when the concentration of TRO is 1.2mg/L, the source water with the worst water quality in July can be treated, and the microbial indexes can meet the requirements of the national standard.2.Compared with the conventional methods, the advanced oxidation-based drinking water treatment method has a faster rate of disinfection of fire bacteria.In the treatment of natural water, the disinfection technology of chlorine and chlorine dioxide usually needs to maintain the disinfectant concentration around 1.5mg/L, and the contact time is more than 20min to achieve better sterilization effect, while the advanced oxidation technology can achieve better sterilization effect when the concentration of TRO is 1.2mg/L.Only the reaction time of 1min can make the microbial index of the symbol reach the national standard.3.The turbidity and concentration of organic compounds in water will affect the bactericidal effect of reactive oxygen free radicals, and the concentration of organic compounds has the most serious influence on the bactericidal effect of Ros.Therefore, in the disinfection and sterilization of drinking water by advanced oxidation technology, the turbidity and organic concentration of water can be effectively reduced by adding filtration, micro-flocculation and other pretreatment processes.It can greatly improve the disinfection and sterilization effect of advanced oxidation technology on drinking water.
【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】：2013
【分類號】：TU991.25

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