本文選題：致嗅物質(zhì)　切入點(diǎn)：氧化　出處：《西安建筑科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：為解決C市汛期存在的飲用水嗅味問(wèn)題,通過(guò)現(xiàn)場(chǎng)調(diào)查分析了S水庫(kù)主要的致嗅物質(zhì)及其濃度,以及A水廠常規(guī)處理工藝對(duì)致嗅物質(zhì)的去除效果;針對(duì)原水中主要的致嗅物質(zhì),分別研究了氧化、吸附、曝氣及聯(lián)用工藝對(duì)致嗅物質(zhì)的去除性能,建立了氧化、吸附、曝氣去除致嗅物質(zhì)的動(dòng)力學(xué)模型,預(yù)測(cè)了不同工藝去除致嗅物質(zhì)的效果;通過(guò)技術(shù)經(jīng)濟(jì)分析,篩選了適宜的嗅味控制技術(shù)。主要研究成果如下:(1)本次現(xiàn)場(chǎng)調(diào)查期間,S水庫(kù)原水中主要致嗅物質(zhì)是二甲基異茨醇(2-MIB),其濃度分別為7.06-136.32 ng/L;其次是土臭素(GSM),其濃度范圍為0-93.98 ng/L;2-MIB和GSM在庫(kù)內(nèi)的空間分布很不均勻,主要存在于壩前主庫(kù)區(qū)的表層水域;A水廠常規(guī)處理工藝基本不能去除致嗅物質(zhì)。(3)GSM和2-MIB的去除率隨高錳酸鉀投加量的增加和氧化時(shí)間的延長(zhǎng)而逐漸增大;在原水致嗅物質(zhì)濃度50~200ng/L的條件下,高錳酸鉀氧化(伴以攪拌)對(duì)致嗅物質(zhì)的去除率分別約為80~100%左右,其中高錳酸鉀氧化對(duì)致嗅物質(zhì)的實(shí)際去除率約為20%左右,且高錳酸鉀對(duì)GSM的氧化去除效果略優(yōu)于2-MIB,且受原水水質(zhì)影響。(4)GSM和2-MIB的去除率隨二氧化氯投加量的增加而增大,二氧化氯氧化去除GSM的效果略優(yōu)于2-MIB;相對(duì)高錳酸鉀而言,在其他條件相同的情況下,二氧化氯氧化去除致嗅物質(zhì)的效果更好。(5)在GSM和2-MIB濃度一定的條件下,粉末活性炭吸附對(duì)致嗅物質(zhì)的吸附速率和去除率隨粉末活性炭投加量的增加而增大;同等條件下,粉末活性炭吸附2-MIB的效果差于GSM,且受原水水質(zhì)影響較大。(6)曝氣吹脫對(duì)GSM的去除效果優(yōu)于2-MIB;曝氣吹脫對(duì)致嗅物質(zhì)的去除率隨氣水比增加而增大,與致嗅物質(zhì)初始濃度無(wú)關(guān);確定了對(duì)應(yīng)不同氣水比的原水致嗅物質(zhì)的上限濃度。(7)建立了高錳酸鉀氧化、粉末活性炭吸附、曝氣吹脫去除致嗅物質(zhì)的動(dòng)力學(xué)模型,運(yùn)用所建的相關(guān)動(dòng)力學(xué)模型,準(zhǔn)確預(yù)測(cè)了不同工藝去除致嗅物質(zhì)的效果,確定了適宜的工藝參數(shù)。(8)針對(duì)對(duì)高錳酸鉀氧化、二氧化氯氧化、粉末活性炭吸附、曝氣吹脫等4種單元工藝和高錳酸鉀氧化-粉末活性炭吸附聯(lián)用、曝氣吹脫-粉末活性炭吸附聯(lián)用等2種聯(lián)用工藝,進(jìn)行了技術(shù)經(jīng)濟(jì)比較;在原水GSM或2-MIB濃度較低時(shí),推薦采用高錳酸鉀氧化或二氧化氯氧化;在原水GSM或2-MIB濃度較高時(shí),首先推薦采用高錳酸鉀氧化工藝,其次推薦高錳酸鉀氧化-粉末活性炭吸附聯(lián)用工藝,如果供氣成本低廉,也可采用曝氣吹脫-粉末活性炭吸附聯(lián)用工藝;不同原水水質(zhì)條件下的適宜工藝參數(shù)可應(yīng)用相關(guān)動(dòng)力學(xué)模型加以確定,但模型參數(shù)需要適當(dāng)調(diào)整。
[Abstract]:In order to solve the problem of sniffing in drinking water in flood season in C City, the main odorous substances and their concentrations in Reservoir S were investigated and analyzed, as well as the removal effect of the main odorous substances in the raw water by the conventional treatment process of A Waterworks, and the main odorous substances in the raw water were analyzed. The effects of oxidation, adsorption, aeration and combined process on the removal of olfactory substances were studied. The kinetic models of oxidation, adsorption and aeration were established, and the effects of different processes on the removal of olfactory substances were predicted. Through technical and economic analysis, The main results of this study are as follows: 1) during the field investigation, the main odorous substance in the raw water of the reservoir was dimethyl isoctadol 2-MIBN, the concentrations of which were 7.06-136.32 ng / L respectively, and the next was GSMN, whose concentration was in the range of 7.06-136.32 ng / L, respectively. The spatial distribution of 0-93.98 ng / L ~ (2-MIB) and GSM in the reservoir is very uneven. The removal rate of GSM and 2-MIB can not be removed basically by the conventional treatment process of the surface water plant in the main reservoir area in front of the dam with the increase of potassium permanganate dosage and the prolongation of oxidation time. Under the condition of 50 ~ 200ng / L olfactory substance concentration in raw water, the removal rate of olfactory substance by potassium permanganate oxidation (accompanied by stirring) is about 80 ~ 100%, and the actual removal rate of olfactory substance by potassium permanganate oxidation is about 20%. The removal efficiency of potassium permanganate on GSM was slightly better than that of 2-MIB, and the removal rates of GSM and 2-MIB increased with the increase of chlorine dioxide dosage, compared with potassium permanganate, compared with potassium permanganate, the removal rate of KMnO _ 2 and 2-MIB increased with the increase of the amount of chlorine dioxide, compared with potassium permanganate, the removal efficiency of KMnO _ 2 was better than that of 2-MIB. Under the same conditions, chlorine dioxide oxidation is more effective in removing odorous substances. 5) under certain concentrations of GSM and 2-MIB, The adsorption rate and removal rate of odorous substances by powder activated carbon increased with the increase of the dosage of powder activated carbon. The adsorption effect of 2-MIB on powdered activated carbon was worse than that of GSM, and the removal efficiency of GSM by aeration blowing was better than that of 2-MIB.The removal rate of odorous substance increased with the increase of air-water ratio, and was not related to the initial concentration of odorous substance. The upper limit concentration of olfactory substance in raw water corresponding to different air-water ratio was determined. The kinetic model of potassium permanganate oxidation, powder activated carbon adsorption and aeration desorption was established. The effects of different processes on the removal of odorous substances were accurately predicted, and the appropriate technological parameters were determined. For potassium permanganate oxidation, chlorine dioxide oxidation, powder activated carbon adsorption, The technical and economic comparison was made between the four unit processes of aeration and potassium permanganate oxidation-powder activated carbon adsorption, aeration blowing and powder activated carbon adsorption, when the concentration of GSM or 2-MIB in raw water was lower, Potassium permanganate oxidation or chlorine dioxide oxidation is recommended. When the concentration of GSM or 2-MIB in raw water is high, the process of potassium permanganate oxidation is first recommended, and the combined process of potassium permanganate oxidation and powdered activated carbon adsorption is recommended, if the gas supply cost is low, The appropriate process parameters under different raw water quality conditions can be determined by the relevant kinetic model, but the model parameters need to be adjusted appropriately.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU991.2

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