Development of a simple nitrate removal reactor using biofilm-electrode.

使用生物膜电极开发简单的硝酸盐去除反应器。

• 批准号: 07555461
• 负责人: SAKAKIBARA Yutaka
• 金额: $ 0.83万
• 依托单位: Gunma University.
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555461/
• 关键词: Biofilm-electrode system; Hydrogen; nitrate; Denitrification; Groundwater; Multi electrodes system; 生物膜電極法; 多重電極法; 電気分解; 地下水硝酸汚染; 脱窒反応; 浄水; 網目状電極; 生物膜反応器; 電気分解反応

Denitrification rates of a biofilm-electrode system were first analyzed based on a mathematical biofilm model. The model takes into cinsideration the mass transfer rates in the electric field, biological reaction rates, and electrochemical reaction rates. Calculation results from the model showed that the response of the denitrification rates to applied electric current can be divided into three regions ; linear, and declined regions. From a view point of process design and control as well as a long term performance of laboratory-scale reactors, the biofilm-electrode system can be operated in the linear region. On the other hand, a novel multi-polar electrode system using metal electrodes was developed for enhanced denitrification and a multi biofilm electrodes reactor (Multi BER) was designed and constructed. Continuous experiments with the Multi BER demonstrated that nitrate in groundwater was stably and quickly removed by an application of electric current and at the same time the treated water was aerated by oxygen produced from anode. Furthermore, it was also demonstrated that nitrate and pesticide were removed concurrently by BER but other major constituents such as SO_4^<2->, Cl^-, and Ca^<2+> were almost the same in the influent and effluent.

基于生物膜数学模型，首次对生物膜-电极系统的反硝化速率进行了分析。该模型考虑了电场中的传质速率、生物反应速率和电化学反应速率。模型计算结果表明，反硝化速率对外加电流的响应可分为三个区域：线性区域和下降区域。从工艺设计和控制以及实验室规模反应器的长期性能的观点来看，生物膜电极系统可以在线性区域中操作。另一方面，开发了一种新型的金属电极多极电极系统，用于强化反硝化，并设计和构建了多生物膜电极反应器（MultiBER）。Multi BER的连续实验表明，通过施加电流，地下水中的硝酸盐被稳定而快速地去除，同时处理后的水被阳极产生的氧气曝气。同时，BER对硝酸盐和农药的去除效果较好，而对SO_4 ~（2<2->-）、Cl ~（2-）和Ca ~（2+）的去除效果较好。

项目成果

T. Sakakibara: "An In-situ Denitrification of Nitrate-contaminated Groundwater Using H_2 as An External Electron Donor" Proc. of the IASTED International Conference on ADVANCED TECHNOLOGY IN THE ENVIRONMETAL FIELD. (in press). (1996)

T. Sakakibara：“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”Proc。

榊原豊: "地下水硝酸イオンの生物学的処理に及ぼす農薬の影響" 土木学会第50年次学術講演会講演概要集第2部(B). 50. 560-561 (1995)

Yutaka Sakakibara：“杀虫剂对地下水硝酸根离子生物处理的影响”日本土木工程学会第 50 届年会学术会议摘要，第 2 部分（B）（1995 年）。

Y.Sakakibara et al.: "The Denitrification and Neutralization Performance of an Electrochemically-Activated Biofiom Reactor Used to Treat Nitrate-Contaminated Groundwater." Water Science and Technology. 36 (1). 61-68 (1997)

Y.Sakakibara 等人：“用于处理硝酸盐污染地下水的电化学激活 Biofiom 反应器的反硝化和中和性能”。

榊原豊: "ガスストリップ型生物膜電極槽による脱窒処理" 第31日本水環境学会年会講演集. (1997)

Yutaka Sakakibara：“使用气条式生物膜电极槽的反硝化处理”日本水环境学会第31届年会论文集（1997年）。

井原一馬: "微生物固定電極を用いた硝酸汚染地下水の浄化に関する基礎的研究" 第30回日本水環境学会年会講演集. (印刷中). (1996)

Kazuma Ihara：“使用固定微生物电极净化硝酸盐污染地下水的基础研究”日本水环境学会第 30 届年会论文集（1996 年出版）。