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1996 Fiscal Year Final Research Report Summary

CONSTRUCTION OF A NEW WATER METABOLIC SYSTEM BASED ON APPROPRIATE SEPARATION OF WATER COLLECTING AND DISCHARGE AREA

Research Project

Project/Area Number 07455208
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Civil and environmental engineering
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

SHIMIZU Tatsuo  Hokkaido Univ.Fac.of Eng.Pro., 工学部, 教授 (10029291)

Co-Investigator(Kenkyū-buntansha) KOBAYASHI Mitsuna  Hokkaido Univ.Fac.of Eng.Associate Pro., 工学部, 助教授 (90001221)
Project Period (FY) 1995 – 1996
Keywordswater metabolic system / advanced wastewater treatment system / natural purification / coagulation process / eutrophication / AGP / soil infiltration / reuse of once used water
Research Abstract

The objective of this study wa to propose the design and construction of urban water metabolic system which supports various water consumption with appropriate quality and quantity by an optimal use of water resource with reuse of once used water. Therefore, the following subjects of research was accomplished.
(1) Development of advanced wastewater treatment system ; The authors had proposed an anaerobic fluidized pellet bed bioreactor system as an advanced sewage wastewater treatment system. This system could be effectively nitrogenous and phosphorus compounds. In addition, by the introduction of 2nd denitrification tank and with feeding to flocculated sewage sludge, the concentration of total nitrogen and total phosphorus in the final effluent was between 0.5 and 1.0mg/l, and between 0.01 and 0.05mg/l respectively. Consequently, eutrophication potential could be greatly decreased.
(2) Natural purification system in cooperation with an advanced wastewater treatment system ; When the adv … More anced wastewater treatment process such as coagulation process was applied to the effluent from sewage treatment works, the algal growth potential (AGP) was decreased to less than 50mug CHLa/l from 120-200mugCHLa/l. Moreover, when the effluent from the coagulation process was stored in the reservoir at 40 day of retention time, the amount of algal biomass was extremely low (20-5.50mugCHLa/l) comparing the value of AGP.This result indicated that the decrease of eutrophication potential enhanced the natural purification capacity.
(3) Improvement of water quality by soil infiltration ; When the effluent from the storing reservoir was infiltrate into the soil, SS,TOC and total nitrogen could be removed physically and biologically, especially nitrogenous substances was removed above 90% by nitrification and denitrification process.
Consequently, the natural purification system combined with the advanced wastewater treatment process enabled the reuse of once used water. Moreover, the soil infiltration process enhanced the water quality. Less

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 清水達雄: "流動層造粒バイオリアクターシステムによるSS、COD、窒素およびリン除去" 水環境学会誌. 18. 142-151 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 小林三樹: "寒冷都市の水に賦存する熱エネルギーの評価" 水文・水資源学会誌. 8. 309-321 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 清水達雄: "下水造粒汚泥を用いる生物学的脱窒" 日本水処理生物学会誌. 32. 23-32 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 小林三樹: "都市の水環境と排水システムの再構築-ドイツ・ルール地域をたづねて-" 月刊下水道. 20. 8-10 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 清水達雄: "高度処理との連携による湖沼の水質改善" 第31回日本水環境学会年会講演集. 31. 315- (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 清水達雄: "捨てた水の再生を考える" 水. 38. 43- (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Shimizu, T.et al.: "A Fluidized Pellet Bed Bioreactor System for SS,COD,Nitrogen and Phosphorus Pemoval" J.of Japan Society on Water Environment. vol.18.No.2. 138-147 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Narita, S., Kobayashi, M.et al.: "Evalution of Heat Energy Within Urban Water in Cold District" J.Japan Soc.Hydrol.and Water Resour. vol.8, No.3. 309-321 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shimizu, T.et al.: "An Anaerobic Fluidized Pellet Bed Bioreactor Process For Simultaneous Removal of Organic, Nitrogenous and Phosphorus Substances" Water. vol.37, No.5. 70-76 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kobayashi, M.: "Reconstruction of urban aqua-environment and wastewater discharge system" J.of Sewerage, monthly. vol.20, No.2. 8-10 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ito, T., Shimizu, T.et al.: "Improvement of water Quality in Eutrophic Lakes by Indroduction of an Upgrading Wastewater Treatment System" Proc.of 31th Conferrence of Japan Society on Water Environment. 315 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shimizu, T.: "Reuse of once used water" Water. vol.38, No.9. 43 (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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