| Nitrogen Removal in Wastewater Irrigation Systems and Its Influence on Groundwater Pollution |
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| 作者姓名： | Wang Min Wu Yongfeng Tang Minggao Zhong Zuoxin Shen ZhaoliHydrogeological |
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| 作者单位： | Wang Min Wu Yongfeng Tang Minggao Zhong Zuoxin Shen ZhaoliHydrogeological Department，China University of Geosciences，Beijing 100083 |
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| 基金项目： | The study is supported by the National Natural Science Foundation of China |
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| 摘 要： | The experiment included ten soil columns and field investigation in 1-2 year duration. Data on the columns continuously flooded with waste water indicated that when total input of NH_4-N reached to above 70％ of the NH_4-N adsorption capacity in soil the breakthrough would appear in the output . Adequate removal of nitrogen from the waste water would require at least 170 cm deep groundwater table . Fine textured soil would promote denitrification . The columns simulating discontinuous waste water irrigation indicated that denitrification existed only in the partial microenviroument of reduction . Groundwater table depth had no strong influence on nitrogen removal . The investigation in field revealed that the groundwater recharged with waste water was not polluted by nitrogen when the aeration profile was in finer textures owing to the combined contribution of nitrification and denitrification.
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Nitrogen Removal in Wastewater Irrigation Systems and Its Influence on Groundwater Pollution |
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| Wang Min,Wu Yongfeng,Tang Minggao,Zhong Zuoxin,Shen ZhaoliHydrogeological.Nitrogen Removal in Wastewater Irrigation Systems and Its Influence on Groundwater Pollution[J].Journal of China University of Geosciences,1995(2). |
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| Authors: | Wang Min Wu Yongfeng Tang Minggao Zhong Zuoxin Shen ZhaoliHydrogeological |
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| Institution: | Wang Min Wu Yongfeng Tang Minggao Zhong Zuoxin Shen ZhaoliHydrogeological Department,China University of Geosciences,Beijing 100083 |
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| Abstract: | The experiment included ten soil columns and field investigation in 1 - 2 year duration. Data on the columns continuously flooded with waste water indicated that when total input of NH4-N reached to above 70% of the NH4-N adsorption capacity in soil the breakthrough would appear in the output . Adequate removal of nitrogen from the waste water would require at least 170 cm deep groundwater table . Fine textured soil would promote denitrification . The columns simulating discontinuous waste water irrigation indicated that denitrification existed only in the partial microenvironment of reduction .Groundwater table depth had no strong influence on nitrogen removal . The investigation in field revealed that the groundwater recharged with waste water was not polluted by nitrogen when the aeration profile was in finer textures owing to the combined contribution of nitrification and denitrification . |
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| Keywords: | wastewater irrigation system nitrogen removal groundwater pollution nitrification denitrification |
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