2 “Johkasou” in Japan 8,600,000 units of “Johkasou” placed in Japan Approx.160,000 units of “Johkasou” were installed in Japan in 2008 for domestic use.In 1969, we started development of “Johkasou” That can treat only night soil(flush toilet water)In 1986, we launched new “Johkasou” that can treat both night soil and gray water.Since then, a new high-performance product development continues.Now we manufacture approx. 20,000 “Johkasou” in a year.
3 Price concerning “Johkasou” in Japan “Johkasou” Catalog Price6,000～12,000 dollarsConstruction CostIncluding “Johkasou”7,500～12,500 dollarsMaintenance and Operation cost a year500～900 dollars
4 Perspective cross section Air-lift pumpBlowerInfluentEffluentAnaerobic filter tankFirst chamberDisinfection tankAnaerobic filter tankSecond chamberSedimentation tankSuspended solids are settled and supernatant flows tooverflow weirRemove solids in the wastewater and anaerobic microbe attached to the filer decompose organic matter．Sludge is stored in these tanksContact aeration tankAerobic microbe grows on the surface of contact mediain the condition of aeration by blower
5 Flow sheet Blower Anaerobic filter tank Anaerobic filter tank Anaerobic filter tankAnaerobic filter tankContact aeration tankSedimentation tankDisinfection tankBOD20mg/LBOD200mg/L200L/P・DKitchenLaundrySinkBathToiletRegular water circulationSloughed sludge transfer
6 Term and conditions of design Average daily wastewater53gal／P／D(200L/P/D)Influent BOD200mg／LEffluent BOD20mg／L ≥BOD removal rate90％ ≤
7 TRANSPARENCY(Tr) CHECK Treated Water Tr>20cm ≒BOD<20mg/L
9 CharacteristicsEnvironment Ministry’s government subsidy compliance type in JapanCertified by the Ministry of Construction (Notification No.1292,No.1-2 in Japan)Adopting Anaerobic Filter Contact Aeration Process (Anaerobic-aerobic treatment process, Denitrification process with nitrified mixed liquor recycle), Effluent quality is stable.Adopting six valves and air-lift pump with adjustment device, Maintenance is easy.FRP (Fiberglass Reinforced Plastic) Body
10 KUBOTA Corporation Johkasou Division Shiga factory Takamatsu, Konan-shi, Shiga-ken, Japan Head Office Shikitsuhigashi, Naniwa-ku, Osaka, Japan URL http://jokaso.kubota.co.jp/