本文選題：微納米曝氣 + 氧傳質(zhì)速率��； 參考：《廣西大學(xué)》2015年碩士論文

【摘要】：近年來隨著國家城鎮(zhèn)化建設(shè)的發(fā)展,及人們對生活質(zhì)量及居住環(huán)境要求的提高,中心城市、鄉(xiāng)鎮(zhèn)中開發(fā)建造了人造景觀水體,以滿足人民物質(zhì)文化需求。在景觀水體富營養(yǎng)化、黑臭現(xiàn)象頻繁發(fā)生的背景下,本文通過對去氧水及景觀污染水體的曝氣實驗,考察了微納米曝氣技術(shù)修復(fù)城市景觀水體效果,并對其氧傳質(zhì)特性及影響因素進行了研究。主要研究結(jié)果如下：(1)改變微納米曝氣器通氣量,其氧傳質(zhì)系數(shù)(KLa)隨著空氣流量增大而增加。標準氧傳質(zhì)效率(SOTE)隨著曝氣流量增加而減小。進行水體溫度對KLa的影響,微納米曝氣組的KLa和SOTE隨著溫度升高而增加,KLa隨著pH增加先下降后上升,在pH=7.2達到最小。曝氣組KLa隨著NH4Cl增大而下降,隨著濁度的增大而增大。而SOTE隨著溫度升高而增加,鼓風(fēng)微孔曝氣組趨勢與其相同,但值比微納米曝氣組小。相對于其他影響因素而言,微納米曝氣KLa與SOTE對于曝氣通氣量變化更敏感。(2)通過對實際景觀水體進行曝氣模擬修復(fù)實驗,微納米曝氣法的氧傳質(zhì)特性較鼓風(fēng)微孔曝氣要好。經(jīng)過21天的實驗可知,微納米曝氣能有效改善水體環(huán)境,其21天平均氣含率為1.09%。(3)在模擬實驗中,對于景觀水體水質(zhì)處理效果方面,微納米曝氣組中CODCr、TP、NH4+-N、TN最終去除率為67.59%、17.30%、70.20%、66.75%,Chl-a上升了14.03%。鼓風(fēng)微孔曝氣組CODCr、TP、NH4+-N、TN最終去除率為56%、13.46%、54.35%、55.6%,Chl-a上升了15.69%。(4)通過記錄微納米曝氣在不同曝氣時間下水體DO的變化規(guī)律,建立了水體DO與不同影響因素和時間之間的經(jīng)驗?zāi)Ｐ�。該模型可以結(jié)合水體條件因素計算達到飽和DO所需曝氣時間。通過對水體DO經(jīng)驗方程進行反算,可得到曝氣KLa預(yù)測模型。本研究探討微納米曝氣技術(shù)對景觀污染水體進行修復(fù)的可行性。研究微納米曝氣KLa的影響因素及DO變化規(guī)律等,建立的經(jīng)驗?zāi)Ｐ蛯ζ貧馊苎跻?guī)律研究具有指導(dǎo)意義,同時為曝氣氧傳質(zhì)特性的研究提供了思路
[Abstract]:In recent years, with the development of national urbanization construction and the improvement of people's requirements for quality of life and living environment, artificial landscape water bodies have been developed and built in central cities and towns to meet the material and cultural needs of the people.Under the background of eutrophication of landscape water body and frequent occurrence of black-odor phenomenon, the effect of micro-nano aeration technology on the restoration of urban landscape water body was investigated through aeration experiments of deoxygenated water and polluted water body.The oxygen mass transfer characteristics and influencing factors were studied.The main results are as follows: 1) the oxygen mass transfer coefficient (KLa) increases with the increase of air flow rate.Standard oxygen mass transfer efficiency (SOTEE) decreases with the increase of aeration rate.Under the influence of water temperature on KLa, the KLa and SOTE of micro-nano aeration group increased with the increase of temperature, and then decreased with the increase of pH, and reached the minimum in pH=7.2.The KLa of aeration group decreased with the increase of NH4Cl and increased with the increase of turbidity.However, SOTE increased with the increase of temperature, and the trend of blast micropore aeration group was the same, but the value was smaller than that of micro-nano aeration group.Compared with other influencing factors, micronano aeration KLa and SOTE are more sensitive to aeration volume change. Through aeration simulation restoration experiment of the actual landscape water body, the oxygen mass transfer characteristics of micro nano aeration method is better than that of blast micro pore aeration.After 21 days of experiments, the results show that micro-nano aeration can effectively improve the water environment, and the average gas holdup in 21 days is 1.09. in the simulation experiment, the final removal rate of CODCrN TPN NH _ 4-NTN in the micro-nano aeration group is 67.590.70.200.2066.75Chl-a increased 14.033.In the simulation experiment, the final removal rate of COD _ (rn) TPN _ (NH _ 4-NTN) in the micro-nano aeration group is 67.59% and 17.30%, and 66.75% Chl-a increases 14.03%.The final removal rate of CODCrTP-NH4-NTN in microporous aeration group was 56 and 54.3554.35. Chl-a increased 15.69.4. by recording the variation of do in water under different aeration time, an empirical model was established between water body do and different influencing factors and time.The aeration time needed to reach saturation do can be calculated by this model combined with water condition factors.The KLa prediction model of aeration can be obtained by inverse calculation of do empirical equation of water body.In this study, the feasibility of micro-nano-aeration technology for remediation of polluted landscape water was discussed.The influence factors of micro and nano aeration KLa and the variation law of do are studied. The established empirical model is of guiding significance for the study of aeration dissolved oxygen law, and also provides a way for the study of aeration oxygen mass transfer characteristics.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X52

【參考文獻】

相關(guān)期刊論文 前8條

1 夏哲韜;史惠祥;李遙;;食藻蟲引導(dǎo)的沉水植被修復(fù)景觀水體的應(yīng)用研究[J];中國給水排水;2011年17期

2 張金梅;劉保偉;;人工濕地在景觀水處理技術(shù)中的應(yīng)用研究——以上水灣東湖山領(lǐng)地人工濕地為例[J];環(huán)境科學(xué)與管理;2013年10期

3 劉書宇;馬放;張建祺;;景觀水體富營養(yǎng)化模擬過程中藻類演替及多樣性指數(shù)研究[J];環(huán)境科學(xué)學(xué)報;2007年02期

4 高靜思;張錫輝;宋乾武;;黑臭水體臭氧化純氧曝氣處理[J];建設(shè)科技;2008年21期

5 葉春;張保君;李春華;曹蓉;;微納米曝氣對植物浮床處理支浜水脫氮效果的影響[J];環(huán)境科學(xué)研究;2012年10期

6 陳旭露;王洪臣;齊魯;羅濤;范海濤;李美娣;;陰離子表面活性劑對微孔曝氣氧傳質(zhì)過程影響的研究[J];環(huán)境科學(xué)學(xué)報;2013年02期

7 胡綿好;奧巖松;朱建坤;楊肖娥;;pH和曝氣對水生植物去除富營養(yǎng)化水體中氮磷等物質(zhì)的影響[J];水土保持學(xué)報;2008年04期

8 葉小梅;熊凱祥;常志州;陳廣銀;杜靜;付廣青;;pH與曝氣耦合調(diào)控厭氧發(fā)酵相分離技術(shù)研究[J];中國沼氣;2013年03期

相關(guān)博士學(xué)位論文 前1條

1 叢海兵;揚水曝氣水源水質(zhì)改善技術(shù)研究[D];西安建筑科技大學(xué);2007年

相關(guān)碩士學(xué)位論文 前2條

1 李園芳;人工濕地對景觀水處理效果研究[D];天津大學(xué);2012年

2 楊盼;城市污水處理廠表曝與鼓風(fēng)曝氣系統(tǒng)能耗比較研究[D];武漢科技大學(xué);2012年

，

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