Development of a H_2 utilizing In-situ denitrification system used for nitrate-contaminated groundwater.

利用原位反硝化系统开发H_2，用于处理受硝酸盐污染的地下水。

• 批准号: 08650639
• 负责人: SAKAKIBARA Yutaka
• 金额: $ 1.41万
• 依托单位: Gunma University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650639/
• 关键词: In-situ purification system; Nitrate; Groundwater; Denitrification; Electrode; Hydrogen; Bioremediation; Autotrophic; 硝酸イオン

A novel in-situ denitrification systemis proposed for treating nitrate in groundwater in shallow aquifers. In the system, H_2 is used as an electron donor which is produced from water by passing electric current to electrodes embedded in aquifer. Laborratory-scale experiments showed that stable and complete denitrification could be achieved over one year without clogging problem. That is, the Present in-situ denitrification process is suitable for treating polluted groundwater under oligotrophic conditions.To enhance the denitrification rate, the effect of the electrode configurations was investigated. The denitrification rates were affected by the configuration especially when the anode and cathode were installed parallel to the groundwater flow direction because pH in the aquifer was increased by the polarization of electrolytic constituents. On the other hand, a mathematical model describing the in-situ system is developed and compared with the experimental results. The denitrification performances calculated at different electric currents were very similar to experimental results. Finally, apossibility of utilizing natural wind and solar energies were investigated in three case studies. A combined in-situ system with wind (or solar) Power generation is considered feasible in some area in Japan.

提出了一种新型的浅层地下水原位反硝化系统。在该系统中，H_2被用作电子供体，其通过将电流传递到嵌入含水层中的电极而从水中产生。小试结果表明，该工艺可在一年以上的时间内实现稳定、完全的反硝化，且无堵塞问题。为提高反硝化速率，研究了电极结构对反硝化效果的影响。反硝化速率的影响，特别是当阳极和阴极平行于地下水流动方向安装的配置，因为在含水层的pH值增加的电解成分的极化。另一方面，开发了描述原位系统的数学模型，并与实验结果进行了比较。在不同电流下计算的脱氮性能与实验结果非常接近。最后，通过三个案例研究探讨了利用自然风能和太阳能的可能性。在日本的一些地区，与风力（或太阳能）发电相结合的原位系统被认为是可行的。

项目成果

Y.Sakakibara: "An In-situ Deritrification with an Application of Electric Current" Proc.of IAWQ Asian-Pacific Regional Conference ASIAN Water Qual'97. 1. 234-244 (1997)

Y.Sakakibara：“应用电流进行原位除铁”，IAWQ 亚太地区会议 ASIAN Water Qual97 议程。

Y.Sakakibara: "An In-situ Denitrification with an Application of Electric Current" Proc.of 6th IAWQ Asia-Pacific RegionalConference. 1. 234-244 (1997)

Y.Sakakibara：“应用电流进行原位反硝化”，第六届 IAWQ 亚太地区会议论文集。

Y.Sakakibara et al.: "An In-situ Denitrification of Nitrate Contaminated Groundwater Using H_2 as an External Electron Donor." Proc.of the IASTED International Conference -Advanced Technology in the Environmental Field-. 116-120 (1996)

Y.Sakakibara 等人：“使用 H_2 作为外部电子供体对硝酸盐污染的地下水进行原位反硝化。”

Y.Sakakibara: "An In-situ Biological Denitrification with in Application of Electric Current" Proc. of IAWQ Asia-Pacific Regional Conference Asian Water guall'97. (in press). (1997)

Y.Sakakibara：“应用电流的原位生物反硝化”Proc。

榊原 豊: "生物膜電極を用いた窒素除去に関する研究" 浄化槽研究. 9(2). 3-9 (1997)

Yutaka Sakakibara：“使用生物膜电极去除氮的研究”化粪池研究 9(2) (1997)。