| 污水土地处理水旱轮作条件下磷素在土层中迁移特征的模拟实验 |
| 摘要点击 952 全文点击 1497 投稿时间：1999-06-03 |
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| 中文关键词 污水土地处理 磷迁移 土壤溶液 水田 旱地 水旱轮作 |
| 英文关键词 wastewater,phosphorous removal,soil solution,paddy field,dry land,water dry cultivation. |
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| 中文摘要 |
| 为了解污水土地处理过程中不同土壤类型土壤溶液 P含量和迁移特征 ,在一种特殊的大型人工模拟土层和地下水实验装置中进行试验 .研究结果表明 :水田条件下 1.5m～ 0.5m土壤溶液 P含量极低 (≤ 0.02 mg/L ) ,但在旱地条件下 ,P含量上升至 0.045mg/L～ 0.628mg/L,P素随入渗污水向下迁移距离可达 1.1 m.在低水力负荷率和较长停留时间的运行条件下 ,1.3m以下土壤溶液和地下水的 P含量处于安全水平 . |
| 英文摘要 |
| In order to understand the concentration of P element of soil solution and the transfer characteristics in different soil type during the wastewater land treatment operation,the experiment was conducted in a special experimental equipment which is a large artificial simulating soil layer and groundwater.The results of experimental researches showed that P content of the soil solution in 1 5m～0 5m soil horizon is very low(≤0 02mg/L)under paddy field condition and 0 045mg/L～0 628mg/L under dry land condition,that the removal distance of P element following percolated wastewater down to bottom slice soil is 1 1m during the dry land condition.The P content of soil solution and groundwater below 1 3m soil horizon is in a safe level under the operation condition of the low hydraulic loading rate and the longer remaining time. |
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