DEVELOPMENT OF NOVEL WATER TREATMENT PROCESSES USING MULTI-ELECTRODE SYSTEM
Project/Area Number |
11650556
|
Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Civil and environmental engineering
|
Research Institution | Gunma University |
Principal Investigator |
SAKAKIBARA Yutaka GUNMA UNIV., CIVIL ENGNG., ASSSOCIATE PROFESSOR, 工学部, 助教授 (80143204)
|
Project Period (FY) |
1999 – 2000
|
Project Status |
Completed (Fiscal Year 2001)
|
Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1999: ¥2,400,000 (Direct Cost: ¥2,400,000)
|
Keywords | Multi-electrode system / novel water treatment process / heavy metal ion / nitrate / phosphorus compound / 電流 / 電荷輸送 / 電極反応 / 水処理 / 電気化学的処理 / 電解 / 直流 |
Research Abstract |
Three novel processes for the treatments of heavy metal (Cu^<2+>) ion, nitrate, and phosphorous compounds, respectively, were proposed and their performances were studied experimentally and theoretically. In the process for heavy metal ion removal, it was found that removal efficiency of a model metal ion (Cu^<2+>) was enhanced comparing with former electrolytic process, because electric current was effectively utilized for the metal reduction on the cathode surface (i.e. Cu^<2+> to Cu) in the multi-electrode system. This enhanced performance is attributable to smaller electric current density below limiting current density. Furthermore, it was shown that the multi-electrode system consisting of GAC also increased bio-electrochemical denitrification rate several times, in comparison with former BER studies. Moreover, the multi-electrode system was successfully applied to a novel phosphorous removal process, where phosphorus precipitation occurred with no addition of chemicals and was facilitated by a unique alkaline zone-formation in the multi-electrode system. This invention was applied as domestic, US and EU patents.
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Report
(3 results)
Research Products
(10 results)