| 引用本文: | 张杰,张朝祥,李冬,郑纪芳,曾辉平.氨氮和天然有机物对滤柱铁锰净化性能的影响[J].哈尔滨工业大学学报,2023,55(2):1.DOI:10.11918/202108064 |
| ZHANG Jie,ZHANG Zhaoxiang,LI Dong,ZHENG Jifang,ZENG Huiping.Effect of ammonia nitrogen and natural organic matter on purification performance of filter column for iron and manganese[J].Journal of Harbin Institute of Technology,2023,55(2):1.DOI:10.11918/202108064 |
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| 摘要: |
| 为探究氨氮和天然有机物对滤柱铁锰净化性能和所需滤层厚度的影响,针对受铁锰氨天然有机污染（TFe 4.7~5.4 mg/L,Mn(Ⅱ) 1.1~1.3 mg/L,NH+4-N 1.4~1.8 mg/L,CODMn 5.9~7.4 mg/L）的地下水,采用模拟生物滤柱在水温14~17 ℃的条件下进行各污染物同层净化试验。试验所用滤柱为除铁锰成熟生物滤柱,利用循环接种和自然挂膜的方法历时79 d完成氨氮和天然有机物同层净化工艺的启动。结果表明,氨氮的存在会使得滤柱Mn(Ⅱ) 去除区间下移,对滤柱的铁锰去除能力无显著影响。在溶解氧（DO）充足的条件下,Fe(Ⅱ)、Mn(Ⅱ)和氨氮三者可同时被氧化去除。天然有机物的存在可造成滤层铁锰净化能力下降,高效铁锰去除区间显著下移,净化铁锰所需滤层厚度增加,对氨氮的去除有一定的促进作用。适当的反冲洗不会对成熟滤层的净化性能造成影响。 |
| 关键词: 地下水 铁锰 氨氮 天然有机物 同池净化 氧化去除区间 反冲洗 |
| DOI：10.11918/202108064 |
| 分类号:X703.1 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51678006)；北京高校卓越青年科学家计划(BJJWZYJH01201910005019) |
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| Effect of ammonia nitrogen and natural organic matter on purification performance of filter column for iron and manganese |
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ZHANG Jie1,2,ZHANG Zhaoxiang1,LI Dong1,ZHENG Jifang1,ZENG Huiping1
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(1.Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering (Beijing University of Technology), Beijing 100124, China; 2. State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology), Harbin 150090, China)
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| Abstract: |
| The influence of ammonia nitrogen and natural organic matter on the performance of filter column for iron and manganese removal was analyzed, and the thickness of filter layer required by the filter column was explored. A pilot-scale biofilter column was constructed to remove iron, manganese, ammonia nitrogen, and natural organic matter (TFe 4.7-5.4 mg/L, Mn(Ⅱ) 1.1-1.3 mg/L, NH+4-N 1.4-1.8 mg/L, CODMn 5.9-7.4 mg/L) from simulated groundwater under the conditions of water temperature of 14-17 ℃. The filter column used in the test was a mature biofilter column for iron and manganese removal. The startup of purifying ammonia nitrogen and natural organic matter in the same layer by means of cyclic inoculation and natural membrane hanging lasted for 79 d. Results show that the presence of ammonia nitrogen caused the Mn(Ⅱ) removal section of the filter column to move down, but it had no significant effect on the removal of iron and manganese by filter column. Fe(Ⅱ), Mn(Ⅱ), and ammonia nitrogen could be removed simultaneously under the condition of sufficient dissolved oxygen (DO). The presence of natural organic matter reduced the ability of the filter layer to purify iron and manganese. The efficient removal section for iron and manganese moved down, and the required filter thickness increased significantly. Natural organic matter could promote the removal of ammonia nitrogen to some extent. Proper backwashing had no effect on the purification performance of mature filter layer. |
| Key words: groundwater iron and manganese ammonia nitrogen natural organic matter single biofilter oxidation and removal section backwashing |
