發(fā)布時間：2018-04-19 15:43

  本文選題：飲用水處理 + 復合型微污染地下水��； 參考：《沈陽建筑大學》2014年碩士論文

【摘要】：我國地下水中自然有機物主要含有腐殖質或多環(huán)芳香烴化合物,一般情況下其含量甚微�，F在北方地區(qū)部分含有過高鐵、錳的地下水受到有機物和氨氮的影響,這是由于工業(yè)廢水、生活污水的排放污染了地表水源,經過常年滲透累積,地下水受有機物和氨氮污染呈現上升趨勢。這不僅加重了地下水受污染程度,同時也加大了去除地下水中鐵、錳的困難。因此,對有機物與氨氮、鐵、錳共存的復合型微污染地下水源尋求經濟實用的飲用水處理方法,成為集中式供水的一個技術問題。采用三級曝氣-接觸氧化過濾法處理復合型微污染地下水,選擇錳砂和陶粒濾料,構成四組不同組合的濾柱系統(tǒng)：陶粒-陶粒-陶粒、錳砂-陶粒-陶粒、陶粒-錳砂-陶粒、錳砂-陶粒-錳砂,錳砂與陶粒粒徑1.25～1.60mm。各級濾柱濾層均0.5m,濾層總厚度1.5m,以保證對復合型微污染地下水的過濾時間,同時為微生物提供了一定的生存空間,有利于微生物的大量附著生長。濾速范圍1.0-3.0m/h,試驗共運行242d。試驗用水水質,鐵1.0～3.0mg/L,錳2.0～3.5mg/L,氨氮2.5～4.5mg/L,CODMn2.5～5.0mg/L。溶解氧充足條件下,四種濾柱組合方式,對鐵、錳和氨氮均有很好的去除效果。3.0m/h濾速下平均出水濃度,鐵不超過0.17mg/L,錳不超過0.09mg/L,氨氮不超過0.15mg/LCODMn去除效果全陶粒組合濾柱較差,3.0m/h濾速下平均出水濃度2.46mg/L。錳砂-陶粒-錳砂組合方式去除效果最好。3.0m/h濾速下出水濃度,鐵0.04～0.28mg/L平均0.16mg/L；錳0.03～0.08mg/L,平均0.06mg/L；氨氮0～0.22mg/L,平均0.07mg/L;CODMn0.5～2.63mg/L,平均1.46mg/L。陶粒-陶粒-陶粒、錳砂-陶粒-陶粒和陶粒-錳砂-陶粒組合,平均出水濃度,鐵：0.17mg/L、0.11mg/L、0.14mg/L;錳：0.08mg/L、0.06mg/L、0.06mg/L;氨氮：0.15mg/L、0.09mg/L、0.09mg/L; CODMn:2.46mg/L、1.52mg/L、1.84mg/L試驗采用的濾速范圍內,濾速對處理效果影響不大。1.0m/h、1.5m/h、2.0m/h、3.0m/h下,4項指標出水濃度均達標。對比發(fā)現,濾速升高,鐵的平均去除率略有降低,錳和氨氮受溶解氧影響較大,溶解氧均值,一級進水7.82mg/L,二級進水8.00mg/L,三級進水5.97mg/L條件下,濾速在1.0-3.0m/h范圍內變動,錳和氨氮出水濃度幾乎沒有變化。由于氨氮和錳共存時對溶解氧的需求量很大,復合型微污染地下水采用生物接觸氧化法處理,對溶解氧有較高的需求,對錳和氨氮的去除影響較大。1.0m/h下簡單跌水曝氣,出水錳和氨氮濃度均較高。在二級進水口增加曝氣頭后,該處溶解氧值平均增加3.10mg/L,達標后四組濾柱對錳的平均去除率分別為：陶粒-陶粒-陶粒97.69%、錳砂-陶粒-陶粒97.39%、陶粒-錳砂-陶粒90.91%、錳砂-陶粒-錳砂96.45%,氨氮的平均去除率分別是：95.39%、94.44%、94.35%、97.44%;由于CODMn進水濃度較低,在跌水曝氣階段出水濃度已達標,增大溶解氧含量后,有機物的去除率得到進一步提高。通過研究發(fā)現,三級曝氣-接觸氧化過濾法對鐵、錳、氨氮、有機物的去除達到了良好的凈化效果,4項指標出水濃度均達到國家飲用水標準。三級曝氣-過濾法處理復合型微污染地下水,最優(yōu)濾料組合方式是錳砂-陶粒-錳砂。濾料粒徑1.25-1.60mm,濾層厚度1.5m,濾速可達3.0m/h,平均需消耗溶解氧16.29mg/L。
[Abstract]:The natural organic matter in the underground water of our country mainly contains humus or polycyclic aromatic hydrocarbons. In general, the content of the organic matter is very small. Now the northern part contains high iron, and the groundwater of the manganese is affected by the organic and ammonia nitrogen. This is due to the industrial waste water, the discharge of domestic sewage pollutes the surface water source, and is accumulated through perennial infiltration. The pollution of organic matter and ammonia nitrogen is rising. It not only aggravates the pollution degree of groundwater, but also increases the difficulty of removing iron and manganese in groundwater. Therefore, it is a technique to seek economical and practical drinking water treatment method for the organic matter and ammonia nitrogen, iron and manganese coexisting micro polluted underground water source. The three stage aeration contact oxidation filtration method was used to treat the compound micro polluted groundwater and select manganese sand and ceramsite filter material to form four different combinations of filter column system: ceramsite ceramsite ceramsite, manganese sand ceramsite, ceramsite manganese sand pottery, manganese sand ceramsite manganese sand, manganese sand and ceramsite particle size from 1.25 to 1.60mm. filter layers of 0.5m, The total thickness of the filter layer is 1.5m, in order to ensure the filtration time of the compound Micropolluted groundwater, and provide a certain living space for microbes. It is beneficial to the microorganism's mass attachment and growth. The filter speed range is 1.0-3.0m/h. The test water quality of 242d. test is run, iron 1 ~ 3.0mg/L, manganese 2 to 3.5mg/L, ammonia nitrogen 2.5 ~ 4.5mg/L, CODMn2.5 to 5.0mg/L. Under the condition of dissolved oxygen sufficient conditions, the combination of four filter columns has a good removal effect on iron, manganese and ammonia nitrogen, the average effluent concentration at.3.0m/h filtration rate, iron not more than 0.17mg/L, manganese not more than 0.09mg/L, ammonia nitrogen not more than 0.15mg/LCODMn removal effect, the whole ceramic composite filter column is poor, the average effluent concentration under 3.0m/h filtration rate 2.46mg/L. manganese sand ceramic grain - The removal effect of manganese sand combination method is best at.3.0m/h filtration rate, 0.04 ~ 0.28mg/L of iron, average 0.16mg/L, manganese 0.03 ~ 0.08mg/L, average 0.06mg/L, ammonia nitrogen 0 ~ 0.22mg/L, average 0.07mg/L, CODMn0.5 to 2.63mg/L, average 1.46mg/L. ceramsite ceramsite ceramsite, manganese sand pottery pottery and ceramsite - manganese sand - ceramsite combination, the average effluent concentration, iron 0.17mg/L, 0.11mg/L, 0.14mg/L; manganese: 0.08mg/L, 0.06mg/L, 0.06mg/L; ammonia nitrogen: 0.15mg/L, 0.09mg/L, 0.09mg/L; CODMn:2.46mg/L, 1.52mg/L, and 1.52mg/L, the filtration rate has little effect on the treatment effect. The removal rate is slightly reduced, manganese and ammonia nitrogen are greatly affected by dissolved oxygen, the mean of dissolved oxygen, the first order water 7.82mg/L, the two stage influent 8.00mg/L, the three stage influent 5.97mg/L condition, the filtration speed is changed in the 1.0-3.0m/h range, and the concentration of the effluent of manganese and ammonia nitrogen almost does not change. The contaminated groundwater is treated with biological contact oxidation method, which has a high demand for dissolved oxygen. The removal of manganese and ammonia nitrogen has a great influence on the simple fall aeration under.1.0m/h. The concentration of manganese and ammonia in the effluent is high. The average increase of dissolved oxygen in the two level inlet is 3.10mg/L, and the average removal rate of manganese by the four groups of filter columns after the standard reaches the standard. Respectively: ceramsite ceramsite ceramsite 97.69%, manganese sand ceramic grain 97.39%, ceramsite manganese sand ceramic grain 90.91%, manganese sand ceramsite manganese sand 96.45%, the average removal rate of ammonia nitrogen is 95.39%, 94.44%, 94.35%, 97.44%. Because of low influent concentration of CODMn, the effluent concentration in the stage of water aeration has reached the standard, and the organic matter will be increased after the dissolved oxygen content is increased. The removal rate has been further improved. Through the study, it is found that the removal of iron, manganese, ammonia nitrogen and organic matter by the three stage aeration contact oxidation filtration method has achieved good purification effect. The water concentration of the 4 indexes all reached the national drinking water standard. The three stage aeration filtration method was used to treat the composite micro polluted groundwater, and the best combination method of the filter material was the manganese sand ceramsite. Manganese sand filter material. The particle size of 1.25-1.60mm, thickness of the filter layer 1.5m, the filtration rate can reach 3.0m/h, the average consumption of dissolved oxygen 16.29mg/L.

【學位授予單位】：沈陽建筑大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：X523;TU991.2

【參考文獻】

相關期刊論文 前10條

1 趙玉華;李艷鳳;于軍;閆，

本文編號：1773708