Japan s Challenge HIDETO YOSHIDA DIRECTOR-GENERAL WASTE MANAGEMENT & RECYCLING MINISTRY OF THE ENVIRONMENT, JAPAN
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1 Japan s Challenge for the Environmental Sanitation HIDETO YOSHIDA DIRECTOR-GENERAL WASTE MANAGEMENT & RECYCLING DEPARTMENT MINISTRY OF THE ENVIRONMENT, JAPAN
2 International Status of Environmental lsanitation ti 2.6billion people cannot access environmental sanitation facilities. Halvethe number ofpeople without sustainable access to basic sanitation by (MDG target10) In the Hashimoto Action Plan, Without radical change, g, we will not achieve the MDG sanitation target. National Governments formulate clearcut strategic sanitation policies and plans. 12billion 1.2 people Improved from 1990 to billion people including 1 billion children Without access
3 Japan s Challenge Japan is willing to work together th with the international ti community to improve worldwide sanitary environment, because Japan has a lot of experience of developing hygienic night soil treatment systems. Night soil recycling system which h was developed d in the past. Johkasou, which is a JAPAN ORIGINAL on site waste water treatment system Night soil treatment facilities Improvement of sanitary environment Prevention of water pollution
4 Dissemination Approach on Environmental lsanitation ti Areas without t flush toilets- t increase of vault toilets Pit Latrine Lti ECO San Container type type toilet(japan) Areas with water worksincrease of flush toilets Public Sewerage Septic Tanks Johkasou (Japan original) Stool/urine separation Type Toilet (1950) Johkasou(Anaerobic Filtration Type)
5 Requirements for toilet Installation ti of sanitary toilets t Separation of night soil from inhabitants Prevention of waterborne disease Clean toilets Smell free Quick removal of night soil by flush toilet Sf Safe and sanitary life Water pollution control
6 Crucial point on Septic Tank Dissemination i of flush toilet t follows water works extension Problems with septic tanks Effluent may be discharged without sufficient treatment. May cause drinking water pollution & untreated sludge dumping Septic tank Threat to the safe and sanitarylife ditch Well Penetrate non- treatment, nondisinfection water polluted wellwater is used for neighborhood An appropriate on site waste treatment facility replaced for septic tank is required, whena flush toilet is installed.
7 Japan s experience of night ihtsoil treatment t tsystem In the past (Until 1950) Night soil had been utilized as a good fertilizer Establishment of recycling systems in urban & rural areas (straw) (Big vault toilet) Since 1950s (transportation of night soil by a person) (tank) Anaerobic digestion Safety & sanitary Fertiliser Faced difficulty with night soil recycling because of rapid urbanization and increasing production of chemical fertilizers Japan has developed hygienic night soil treatment technology.
8 Japan s proposal p -Johkasou- Advanced domestic waste water treatment system (tank) developed in Japan Treats wastewater as clean as 20 ppm as BOD Treats not only wastewater but night soil Operated for 11 million Japanese people in less populated areas around Japan, as a technique which is cost effective and able to be installed in a short time. Johkasou (Anaerobic filter contact aeration type)
9 Japan s proposal p -Johkasou-(continued)( ) Properly disinfected i d effluent Protect water environment and ensure rural water resources Employ such technologies as Biological contactor ditch process Trickling filter process Anaerobic filter contact aeration process Biofilm filtration tank Moving bed biofilm tank, etc. Varieties of Johkasou with different treatment capacity to conform to the required effluent level and cost in each country
10 Japan s proposal -Johkasou-(continued) Requires periodical maintenance such as maintenance of biofilm andremoval of sludge Requires certified technicians/engineers i i for maintenance (examination) Johkasou manager (inhabitant) Request Technical supervisor (maintenance) Entrusted Specified inspecting agency Entrusted (desludging) Johkasou maintenance vendor Johkasou desludging vendor Figure. Organization for maintenance, desludging and inspection in Japan
11 Japan s proposal -Night soil treatment system- Collects night soil from each home and transfers it to central night soil treatment plants Operated for 14 million Japanese people in rural areas around Japan Recovery of methane or production of fertilizer
12 Japan s proposal -Night soil treatment system-(continued) Treat night soil in sanitary manner to meet standards d influent Anaerobic digestion process screening Equalisation tank 1st digestion tank 2 nd digestion tank water Aeration tank Sedimenta tion tank disinfection effluent Measuring tank Sludge Sludge Aerobic digestion process Dehydration sludge Dehydration sludge Sludge thickening tank Double step activated sludge (biological denitrogen) process, etc.
13 Features of Japan s on site treatment system (container type toilet) 1.Johkasou More cost effective and short installation time in less populated areas Joint treatment with night soil and domestic waste water with effluent ascleanas that of sewage. (20mg/L of BOD and less) Effluent is disinfected properly. Ensure the rural water resources (Johkasou) (Sludge) (Effluent) BOD20mg/L and less 2.Honey truck (Vacuum car) Effective and sanitary transportation of night soil and sludge Treatment Facility 3.Night Soil Treatment Facility Treats high concentration of night soil and sludge hygienically. Resource recovery (ex. Methane, Fertilizer)
14 Cost comparison of collective systems and on site systems Per Capit construction costs) ta Cost ( n and ma (including aintenance Balance point On-site system Collective system Population density On-site system (Johkasou) for less populated areas Collective system (Sewage) for densely populated areas
15 Japan s international cooperation Disseminate i Japan s experience of night ihtsoil treatment t t Capacity building on night soil treatment Suggest night soil treatment system/technology which is applicable for developing countries Provide relevant technical cooperation Water Environment Partnership in Asia (WEPA) aims to promote good governance in water environment management Japan China Cooperation including model project for decentralized wastewater treatment in rural and other areas in China.
16 Strategy of Water Environment Partnership in Asia (WEPA) What s WEPA? WEPA is aninitiative that the Ministry of the Environment of Japan proposed at the 3 rd World Water Forum held in Japan in WEPA aims to strengthen governance through capacity building and sharing knowledge and information on water environmental governance. The 2 nd WEPA International Forum that stakeholders representing gg government, academia, the private sector and NGOs participated in was held last December as an open event of the 1 st Asia Pacific Water Summit. Myanmar Lao Korea Indonesia China Information platform db.net Collection and analysis of information each countries Promoting dialogues among various stakeholders Promoting water environment governance Malaysia Philippines Thailand Vietnam Japan Cambodia Enhancement of networks among counties 11 countries in the Asian monsoon region
17 Japan China Cooperation for water environment protection The current conditions of water environment problems in China The issue of water pollution is becoming more serious The Algae outbreak in Taihu Lake (The Yomiuri Shimbun 12 JUL Y 2007) Japan s cooperation for water environment Model project for decentralized wastewater treatment in rural and other areas Discharge Treatment Plant Drainage into the Chang Jiang( Joint Statement by Japan and the People's Republic of China on the Further Enhancement of Cooperation for Environmental Protection (Provisional Translation) 11 April 2007 Tokyo 1.Cooperation will be implemented to enhance the protection of drinking water reservoir areas, prevention of pollution of rivers, lakes, seas and groundwater, in particular water pollution prevention measures in important water basins including the Bo Hai and Huang Hai regions and the Yangtze basin. Construction of small size wastewater treatment facilities Study of valuation and management Examples of decentralised wastewater treatment plant adapted to the each areas Rock bed filter Rotating biological contactor Trickling filter process Extend to all China Prevention of pollution of rivers, lakes, seas and groundwater
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