本文關(guān)鍵詞： MET 氨氮 地下水 模型　出處：《東華理工大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：為解決滲透性反應(yīng)墻和抽出處理法投資大、工程難改動(dòng)等問(wèn)題,發(fā)明并設(shè)計(jì)一種將物理化學(xué)、生物修復(fù)和植物修復(fù)有機(jī)結(jié)合的新型地下水污染修復(fù)技術(shù),并命名為MET(Multi-layer Enhance groundwater remediation Technology,多級(jí)強(qiáng)化地下水修復(fù)技術(shù))。為研究MET對(duì)地下水污染物去除情況,選擇地下水氨氮為目標(biāo)污染物,搭建MET小試試驗(yàn)裝置,研究MET對(duì)模擬污染地下水和實(shí)際污染地下水中氨氮的去除機(jī)理及效果,并分析MET去除地下水氨氮過(guò)程中氮轉(zhuǎn)化情況,構(gòu)建氮變量以及氮變量影響因素的MET氮素轉(zhuǎn)化模型,在此基礎(chǔ)上,通過(guò)MET野外現(xiàn)場(chǎng)工程試驗(yàn)進(jìn)一步驗(yàn)證MET去除地下水中氨氮機(jī)理及效果。研究結(jié)論如下:(1)通過(guò)MET小試試驗(yàn)的研究,表明模擬污染地下水在進(jìn)水水力負(fù)荷為14.68m3/(m2·d)、氨氮濃度為25mg/L和連續(xù)運(yùn)行45d的條件下,氨氮總?cè)コ试?2%以上;實(shí)際污染地下水在進(jìn)水水力負(fù)荷為6.18~8.10m3/(m2·d)、氨氮濃度10.53~13.79mg/L和連續(xù)運(yùn)行37d的條件下總?cè)コ试?2%以上。同時(shí)研究結(jié)果表明MET沸石在吸附氨氮基礎(chǔ)上,與陶粒共同作為微生物繁殖的附著載體,極大地提高了硝化細(xì)菌去除地下水氨氮的效果。(2)通過(guò)分析MET去除地下水氨氮過(guò)程中氮轉(zhuǎn)化情況,構(gòu)建MET氮素轉(zhuǎn)化模型,并對(duì)MET小試數(shù)據(jù)擬合,求取了氮素轉(zhuǎn)化模型中未知參數(shù),采用Estonia Constructed Wetland的試驗(yàn)數(shù)據(jù)對(duì)氮素轉(zhuǎn)化模型進(jìn)行驗(yàn)證,驗(yàn)證結(jié)果為氮素轉(zhuǎn)化模型預(yù)測(cè)值與實(shí)測(cè)值結(jié)果接近,一定程度上表明構(gòu)建的氮素轉(zhuǎn)化模型可用于MET技術(shù)長(zhǎng)期處理地下水中氮去除效果的預(yù)測(cè)。(3)MET現(xiàn)場(chǎng)工程試驗(yàn)在小試獲取的成果基礎(chǔ)上,利用沸石對(duì)氨氮吸附方法去除地下水氨氮污染,試驗(yàn)結(jié)果表明去除率在74%以上,并分析了進(jìn)出水“三氮”濃度、DO、ORP、p H和電導(dǎo)率的變化規(guī)律,驗(yàn)證微生物硝化作用的存在,初步肯定MET用于實(shí)際去除地下水氨氮的效果。
[Abstract]:In order to solve the problems of high investment in permeable reactive wall and extraction treatment method, and difficult to change in engineering, a new type of groundwater pollution remediation technology combining physical chemistry, bioremediation and phytoremediation was invented and designed. And named MET(Multi-layer Enhance groundwater remediation technology, multilevel enhanced groundwater remediation technology. In order to study the removal of groundwater pollutants by MET, the ammonia nitrogen of groundwater was selected as the target pollutant, and the MET experimental equipment was built. This paper studies the mechanism and effect of MET on ammonia nitrogen removal from simulated polluted groundwater and actual polluted groundwater, analyzes the nitrogen conversion in the process of MET removal of groundwater ammonia nitrogen, and constructs a MET nitrogen conversion model of nitrogen variable and its influencing factors. On this basis, the mechanism and effect of MET removal of ammonia nitrogen in groundwater are further verified by MET field engineering experiments. The conclusions are as follows: 1) through the small scale test of MET, The results show that the total removal rate of ammonia nitrogen is more than 92% under the condition of hydraulic load of 14.68 m3 / m ~ 2 路dL, concentration of 25 mg / L ammonia nitrogen and continuous operation for 45 days. The total removal rate of actual polluted groundwater was above 72% under the conditions of hydraulic loading of 6.18o8.10m3 / m3 / m2 路dL, ammonia nitrogen concentration of 10.53g / L 13.79mg / L and continuous operation of 37d. The results also showed that MET zeolites were adsorbed on the basis of ammonia nitrogen. The effect of nitrifying bacteria on the removal of ammonia nitrogen from groundwater was greatly improved by using ceramsite as the attachment carrier of microbial reproduction. By analyzing the nitrogen transformation in the process of MET removal of groundwater ammonia nitrogen, a MET nitrogen transformation model was constructed. The unknown parameters in the nitrogen conversion model were obtained by fitting the data of the MET experiment. The model was verified by the experimental data of Estonia Constructed Wetland. The results showed that the predicted value of the model was close to the measured value. It is indicated to some extent that the nitrogen conversion model can be used to predict the nitrogen removal effect of long-term treatment of groundwater by MET technology. The ammonia nitrogen pollution of groundwater was removed by zeolite adsorption method. The results showed that the removal rate was more than 74%. The variation law of "three nitrogen" concentration and electrical conductivity were analyzed to verify the existence of microbial nitrification. The effect of MET on the removal of ammonia nitrogen from groundwater was preliminarily confirmed.
【學(xué)位授予單位】：東華理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：X523

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 劉景濤;孫繼朝;林良俊;張玉璽;荊繼紅;;廣州市地下水環(huán)境三氮污染初探[J];中國(guó)地質(zhì);2011年02期

2 金婧靚;;農(nóng)業(yè)非點(diǎn)源污染的管理及控制對(duì)策研究[J];今日科苑;2010年21期

，

本文編號(hào)：1543083