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TOP > English > Research & Development > Improvement of combined sewerage
Prevention of rainwater overflow from combined sewer systems is one of the most important and urgent issues. The amendment in 2003 of the Enforcement Order of the Sewerage Act of Japan stipulates that the improvements must be completed within the specified period (by FY 2013 in principle; however, by FY 2023 if the pertinent areas are extensive) and encourages more efficient and effective sewerage operation. Aiming at the creation of a good social environment, JIWET has been working on the improvement of combined sewer systems via joint research.
Joint research already conducted
「A research on countermeasures against combined sewer overflow (CSO)」、
「Surveillance study on retention facility execution basis plan related toimprovement of combined sewer system works」
「Research on Performance Evaluation of High-Rate Filtering Facility」
etc.
Recent research
「Joint Study on the Improvement of CSO by the Use of Infiltration Facilities」
etc.
- +Result
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- +2012
- +2010
- +2009
- +2008
- +2007
- +2006
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- Research on Combined Sewer Overflow During and After Rainfall by Nagoya City
- Research on the high-speed fiber filtration with chemical precipitation for improving a combined sewerage system
- Study on the fiber filtration technology for CSO control
- Research on Performance Evaluation of High-Rate Filtering Facility in Shibaura Water Reclamation Center
- +2005
- +2004
- +2003
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- Research on confluence improvement that uses disk filter
- Surveillance study on Otsu City combined sewer system urgent improvement plan
- Surveillance study on destination of primary effluent discharge related to confluence improvement works
- Surveillance study on effect of infiltration facilities introduction in Fukuoka City
- Survey study on the combined sewer system improvement program of Kitakyushu City
- Investigation research on circular diversion Weir of improving confluence in the Otsu City
- +2002
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- Investigation on the improvement of the combined sewer overflows by filtering screen
- Research on gate for combined sewer system improvement
- Survey study on monitoring for the establishment of improvement program of combined sewer system
- Surveillance study on retention facility execution basis plan related to improvement of combined sewer system works
- Research on Otsu City combined sewer system urgent improvement plan
- Surveillance study on Kitakyushu City combined sewer system improvement plan decision
- Surveillance study on Chiba City central rain water trunk line confluence improvement facilities plan
- +2001
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- Study on the utilization of the technology of high-rate coagulation-precipitation treatment
- Research on the discharge load reduction of combined sewer overflows by high-rate fabric filtration
- Study on setting goals of the improvement program in combined sewer
- Study on the condition of untreated wastewater in combined sewer
- Survey study on the improvement of combined sewer in Otsu city
- +1999
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- Investigation of a measure for combined sewer system overflow water
- Survey study on the separation of combined sewer system
- Survey study on rain water drain plan of Chiba City center processing district
- Investigation of actual conditions and research on making of combined sewer system separation
- Basic study on the establishment of improvement plan for combined sewer
- Study on measures for CSO in Europe
- Study on the improvement of combines sewer in Otsu City
- +1998
