1996 Fiscal Year Final Research Report Summary
RESEARCH ABOUT THE DEVEROPMENT OF THE URBAN ENVIRONMENT PRESERVATION SYSTEM ADAPTED TO THE GLOBAL ENVIRONMENT PRESERVATION
| Project/Area Number |
07305023
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 総合 |
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| Research Field |
Civil and environmental engineering
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
NOIKE Tatsuya TOHOKU UNIVERSITY,DEPERTMENT OF CIVIL ENGINEERING,PROFESSOR, 工学部, 教授 (90005398)
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| Co-Investigator(Kenkyū-buntansha) |
OHTA Yukio HOKKAIDOUNIVERSITY,DEPARTMENT OF SANITARY ENGINEERING,PROFESSOR, 工学部, 教授 (00100058)
WATANABE Yoshikimi HOKKAIDOUNIVERSITY,DEPARTMENT OF SANITARY ENGINEERING,PROFESSOR, 工学部, 教授 (00040999)
HANAKI Keisuke UNIVERSITY OF TOKYO,RESEARCH CENTER FOR ADVANCED SCIENCE AND TECHNOLOGY,PROFESSO, 先端科学技術研究センター, 教授 (00134015)
MATSUO Tomonori UNIVERSITY OF TOKYO,DEPARTMENT OF URBAN ENGINEERING,PROFESSOR, 工学部, 教授 (80010784)
MIYAHARA Takashi TOHOKU UNIVERSITY,DEPERTMENT OF CIVIL ENGINEERING,ASSISTANT PROFESSOR, 工学部, 講師 (70239432)
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| Project Period (FY) |
1995 – 1996
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| Keywords | EARTH / METHANE / NITROUS OXIDE / HEAT PUMP / WASTE / ANOXIC TANK |
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| Research Abstract |
METHANE,THE MOST ABUNDANT AND STABLE HYDROCARBON GAS IN THE ATMOSPHERE,PLAYS AN IMPORTANT ROLE IN THE PHOTOCHEMISTRY OF BACKGROUND TROPOSPHERE.THE GREENHOUSE EFFECT OF METHANE IS CONSIDERED TO BE 25 TIMES OF THAT OF CARBON DIOXIDE IN THE ATMOSPHERE.NITROUS OXIDE IS ONE OF THE EFFECTIVE CREENHOUSE GASES.THE CURRENT ATMOSPHERIC NITROUS OXIDE IS PAAROXIMATELY 310 PPB AND IS INCRESING AT A RATE OF 0.2-0.3%/YR.IN THIS PROJECT,WE STUDY ABOUT THE DEVEROPMENT OF THE URBAN ENVIRONMENT PRESERVATION SYSTEM ADAPTED TO THE GLOBAL ENVIRONMENT PRESERVATION.HYDROGEN FERMENTATIONS BECAME STABLE AFER 50 DAYS.AND IT DID NOT EFFECT THE DIFERENCE OF SEED SLUDGE.NITROUS OXIDE DISSOLVED IN THE EFFLUENT FROM THE FIRST REACTOR WAS EFFECTIVELY CONSUMED IN THE SECOND REACTOR (ANOXIC TANK) BY DENITRIFICATION.ADDITION OF METHANOL INTO THE FIRST REACTOR WAS AN ORGANIC CARBON SOURCE FOR DENITRIFIERS WAS EFFECTIVE TO SUPPRESS NITROUS OXIDE PRODUCTION IN THE REACTOR.ENVIRONMENTAL ADVANTAGE OF DISTRICT HEATING SYSTEM UTILIZING THE WASTE HEAT FROM SEWAGE WAS EXAMINED BY USING THE METHOD OF LIFE CYCLE ASSESSMENT.CARBONDIOXIDE EMISSION IN OPERATION STAGE IS LOWER WHEREAS THAT IN CONSTRUCTION STAGE IS HIGHER IN THE DISTINCT HEATING SYSTEMEMIT LESS CARBONDIOXIDE THAN THE CURRENT CONDITION.
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