三级接触氧化过滤法处理复合型微污染地下水效能试验

发布时间：2018-04-19 15:43

本文选题：饮用水处理 + 复合型微污染地下水　；参考：《沈阳建筑大学》2014年硕士论文

【摘要】：我国地下水中自然有机物主要含有腐殖质或多环芳香烃化合物,一般情况下其含量甚微。现在北方地区部分含有过高铁、锰的地下水受到有机物和氨氮的影响,这是由于工业废水、生活污水的排放污染了地表水源,经过常年渗透累积,地下水受有机物和氨氮污染呈现上升趋势。这不仅加重了地下水受污染程度,同时也加大了去除地下水中铁、锰的困难。因此,对有机物与氨氮、铁、锰共存的复合型微污染地下水源寻求经济实用的饮用水处理方法,成为集中式供水的一个技术问题。采用三级曝气-接触氧化过滤法处理复合型微污染地下水,选择锰砂和陶粒滤料,构成四组不同组合的滤柱系统：陶粒-陶粒-陶粒、锰砂-陶粒-陶粒、陶粒-锰砂-陶粒、锰砂-陶粒-锰砂,锰砂与陶粒粒径1.25～1.60mm。各级滤柱滤层均0.5m,滤层总厚度1.5m,以保证对复合型微污染地下水的过滤时间,同时为微生物提供了一定的生存空间,有利于微生物的大量附着生长。滤速范围1.0-3.0m/h,试验共运行242d。试验用水水质,铁1.0～3.0mg/L,锰2.0～3.5mg/L,氨氮2.5～4.5mg/L,CODMn2.5～5.0mg/L。溶解氧充足条件下,四种滤柱组合方式,对铁、锰和氨氮均有很好的去除效果。3.0m/h滤速下平均出水浓度,铁不超过0.17mg/L,锰不超过0.09mg/L,氨氮不超过0.15mg/LCODMn去除效果全陶粒组合滤柱较差,3.0m/h滤速下平均出水浓度2.46mg/L。锰砂-陶粒-锰砂组合方式去除效果最好。3.0m/h滤速下出水浓度,铁0.04～0.28mg/L平均0.16mg/L；锰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、锰砂-陶粒-陶粒和陶粒-锰砂-陶粒组合,平均出水浓度,铁：0.17mg/L、0.11mg/L、0.14mg/L;锰：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试验采用的滤速范围内,滤速对处理效果影响不大。1.0m/h、1.5m/h、2.0m/h、3.0m/h下,4项指标出水浓度均达标。对比发现,滤速升高,铁的平均去除率略有降低,锰和氨氮受溶解氧影响较大,溶解氧均值,一级进水7.82mg/L,二级进水8.00mg/L,三级进水5.97mg/L条件下,滤速在1.0-3.0m/h范围内变动,锰和氨氮出水浓度几乎没有变化。由于氨氮和锰共存时对溶解氧的需求量很大,复合型微污染地下水采用生物接触氧化法处理,对溶解氧有较高的需求,对锰和氨氮的去除影响较大。1.0m/h下简单跌水曝气,出水锰和氨氮浓度均较高。在二级进水口增加曝气头后,该处溶解氧值平均增加3.10mg/L,达标后四组滤柱对锰的平均去除率分别为：陶粒-陶粒-陶粒97.69%、锰砂-陶粒-陶粒97.39%、陶粒-锰砂-陶粒90.91%、锰砂-陶粒-锰砂96.45%,氨氮的平均去除率分别是：95.39%、94.44%、94.35%、97.44%;由于CODMn进水浓度较低,在跌水曝气阶段出水浓度已达标,增大溶解氧含量后,有机物的去除率得到进一步提高。通过研究发现,三级曝气-接触氧化过滤法对铁、锰、氨氮、有机物的去除达到了良好的净化效果,4项指标出水浓度均达到国家饮用水标准。三级曝气-过滤法处理复合型微污染地下水,最优滤料组合方式是锰砂-陶粒-锰砂。滤料粒径1.25-1.60mm,滤层厚度1.5m,滤速可达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.

【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：X523;TU991.2

【参考文献】