6th EWA / JSWA / WEF Joint Conference „The Resilience of the Water Sector“ 15-18 May 2018, Munich, Germany Conversion of sewage sludge into solid fuel project in the City of Osaka – For creation of a recycling-oriented society and prevention of global warming – Tsuyoshi Sanjo Osaka, JAPAN 17 May 2018 1
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Conversion of sewage sludge into solid fuel project in the ... · Primary sludge Wastewater Treatment 4 Final settling tank Excess sludge Gravity thickener Thickening Dewatering Digested
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6th EWA / JSWA / WEF Joint Conference
„The Resilience of the Water Sector“
15-18 May 2018, Munich, Germany
Conversion of sewage sludge into solid fuel project in the City of Osaka
– For creation of a recycling-oriented society and prevention of global warming –
Tsuyoshi Sanjo
Osaka, JAPAN
17 May 2018
1
6th EWA / JSWA / WEF Joint Conference
„The Resilience of the Water Sector“
15-18 May 2018, Munich, Germany
• Background
• Three Key Points
• Overview
• Benefits
• The future plan for further utilization of
biomass energy
• Conclusions
Contents
2
6th EWA / JSWA / WEF Joint Conference
„The Resilience of the Water Sector“
15-18 May 2018, Munich, Germany
Osaka pref.
City area : 222 km2
Resident population: 2.66 million JAPAN
Profile of Osaka City
Osaka Castle
Dotonbori River
Universal studios
Japan
3
Tokyo
Kyoto Sewage Treatment Plants (STPs) : 12 (●)
Hirano STP
Maishima sludge treatment plant
G20 summit Osaka 2019
6th EWA / JSWA / WEF Joint Conference
„The Resilience of the Water Sector“
15-18 May 2018, Munich, Germany
Influx Reaction tank Primary
settling tank Effluent
Primary sludge
Wastewater Treatment
4
Final settling tank
Excess sludge
Gravity thickener
Thickening Dewatering
Digested sludge
(from other STPs)
Dehydrator Dewatered
sludge
Slag
Recycling (Construction
materials)
Melting furnace (2000- )
City gas
Melting
Sludge Treatment
Incineration
Ash Landfill
disposal
(waste) Kerosene
Incinerator (1982- )
New sludge-recycling facility
6th EWA / JSWA / WEF Joint Conference
„The Resilience of the Water Sector“
15-18 May 2018, Munich, Germany
waste
End products
Ash Landfill disposal
New approach for sludge recycling
Treatment method
5
Incineration (800ºC)
End use
Incinerator
Construction work Melting (1200ºC) Slag Slag
Sewer pipe
Material
use
(Backfilling sand additive)
GL Melting
furnace
Dewatered
sludge
Energy
use Combustion with coal
Coal-fired
power plant
Solid fuel
Carbonizing facility
Conversion of sewage sludge into solid fuel project