碳化稻壳-铁锰氧化菌耦合净化严寒村镇高铁锰地下水效能与机制

发布时间：2018-05-25 17:49

本文选题：低温 + 高铁锰地下水　；参考：《环境科学》2017年03期

【摘要】：针对严寒地区特有地理气候条件及制约当前村镇建设与发展的典型问题,以建设绿色低碳、节能环保村镇为目标,研发碳化稻壳-优势铁锰氧化菌耦合工艺净化严寒村镇高铁锰地下水,探究生物滤柱低温快速启动方式;基于接触氧化与生物法,对比分析不同滤速条件下滤柱沿程除铁效能与反应速率,研究生物滤层除铁机制;基于扫描电子显微镜(scanning electron microscope,SEM)、傅立叶红外线光谱(Fourier transform infrared spectroscopy,FTIR)、X射线光电子能谱(X-ray photoelectron spectroscopy,XPS)、拉曼光谱(Raman spectra)、电子顺磁共振(electron paramagnetic resonance,EPR)对运行不同阶段的滤料与反冲洗水泥样表征剖析生物滤层除锰机制.结果表明,优势菌液低滤速-全循环的运行方式使稻壳生物滤层成熟且稳定仅需15 d;稳定运行阶段出水铁、锰、细菌浓度分别低于0.3 mg·L~(-1)、0.1 mg·L~(-1)、100 CFU·m L~(-1),均满足国家生活饮用水卫生标准(GB 5749-2006);除铁机制主要依靠物化作用、辅以生物作用;在滤料成熟阶段与稳定运行初期除锰主要依靠生物作用,稳定运行后期物理化学作用占优势;该研究为严寒村镇Fe~(2+)、Mn~(2+)地下水集中处理应用提供了技术支撑.
[Abstract]:In view of the unique geographical and climatic conditions in severe cold areas and the typical problems restricting the construction and development of villages and towns at present, the goal is to build green, low carbon, energy saving and environmental protection villages and towns. To develop the coupling process of carbonized rice husk and dominant ferromanganese oxidizing bacteria for purifying ferromanganese groundwater in cold villages and towns, and to explore the quick start-up method of biological filter column at low temperature, based on contact oxidation and biological method, The mechanism of iron removal in biofilter was studied by comparing and analyzing the efficiency and reaction rate of iron removal along the filter column under different filtration rates. Characterization of filter media and backwash cement samples at different stages of operation based on scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy (Raman spectroscopy), electron paramagnetic resonance (EPR) Mechanism of manganese removal in biofilter. The results showed that the biofiltration layer of rice husk was mature and stable for only 15 days, and the effluent iron, manganese and manganese were stable in the stable stage. The concentration of bacteria was lower than 0. 3 mg / L, respectively, and the concentration of bacteria was less than 0. 1 mg / L ~ (-1), which met the national hygienic standard for drinking water (GB5749-2006). The mechanism of iron removal mainly depended on physicochemical action and biological action, and manganese removal mainly depended on biological action in the maturation stage and the early stage of stable operation of the filter material. The physicochemical action is dominant in the late stage of stable operation, and this study provides technical support for the application of concentrated treatment of groundwater in the cold town of Fe~(2.
【作者单位】：东北农业大学水利与土木工程学院;东北农业大学资源与环境学院;
【基金】：黑龙江省博士后科学基金项目(LBH-Z13025)
【分类号】：R123

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