| 稀土硫铵废水高浓度氨氮回收试验研究 |
| |
| 引用本文： | 陈莉荣,武文斐,戴宝成.稀土硫铵废水高浓度氨氮回收试验研究[J].环境科学与技术,2009,32(2). |
| |
| 作者姓名： | 陈莉荣 武文斐 戴宝成 |
| |
| 作者单位： | 内蒙古科技大学能源与环境学院,内蒙古包头,014010 |
| |
| 基金项目： | 内蒙古科技大学校内基金，内蒙占高等学校科研项目 |
| |
| 摘 要： | 研究采用预处理和两级吹脱的方法处理稀土硫铵废水,并回收氨氮。试验结果表明,每吨废水投加7.7gCaO进行预处理,可以将废水的pH值提高到12.1,同时硬度可降低91.8%;一级吹脱在pH>12、气液比6000条件下,吹脱3h氨氮去除率可达97%以上;二级吹脱在pH>11.3、气液比4000条件下,吹脱2h氨氮去除率可达86.2%以上,出水满足排放标准。两级吹脱出的氨氮用浓硫酸吸收,可生成硫酸铵17.39g/t废水。
|
| 关 键 词： | 稀土 废水处理 硫铵 吹脱法 回收 |
Recovery of High Concentration Ammonia Nitrogen in Rare Earth Ammonia Sulfate Wastewater |
| |
| CHEN Li-mng,WU Wen-fei,DAI Bao-cheng.Recovery of High Concentration Ammonia Nitrogen in Rare Earth Ammonia Sulfate Wastewater[J].Environmental Science and Technology,2009,32(2). |
| |
| Authors: | CHEN Li-mng WU Wen-fei DAI Bao-cheng |
| |
| Institution: | School of Energy and Environment Engineering;Inner Mongolia University of Science and Technology;Baotou 014010;China |
| |
| Abstract: | Sedimentation and blow-off method were used to treat rare earth ammonia sulfate wastewater and recover ammonia nitrogen. Results showed that hardness can be decreased to 91.8% and pH improved to 12.1 by adding amount of 7.7gCaO into wastewater of 1t. Removal efficiency of ammonia nitrogen in the first blow-off treatment was 97% under the condition of pH 12,blow-off time 3h and gas-liquid ratio 6,000. Removal efficiency of ammonia nitrogen in the second blow-off treatment was 86.2% under the condition of pH ... |
| |
| Keywords: | rare earth wastewater treatment ammonia sulfate blow-off method recovery |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
