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Resource recovery from sewage sludge

Sewage sludge refers to the solid residue left after separating solids during
sewage or wastewater treatment. and such sewage sludge is used as a resource to produce auxiliary fuel.


Photo Procedure Expected effects
Resource recovery from sewage sludge Sewage sludge is
recycled as a cover material for domestic waste landfill through
solidification and curing processes

※ Shut down on July 1st, 2025
  • • Recycle as landfill cover material
After drying sewage sludge, organic solid fuel is produced and used as auxiliary fuel for power plants
  • • Power plant auxiliary fuel sales → Revenue creation
  • • Fossil fuel replacement effect by using biomass organic solid fuel
  • • Securing greenhouse gas reduction effect

Biogasification of food wastewater

Producing biogas by utilizing waste effluent generated from food waste


Photo Procedure Expected effects
Biogasification of food wastewater Injecting food waste effluent → Removal of impurities → Anaerobic
digestion → Pretreatment of biogas → Production of biogas
  • • Biogas production through eco-friendly treatment of food waste effluent – for internal use at SLC’s Waste-to-Energy facilities
  • • Essential facilities in the era of high oilprices

Fuelization of biogas

Collecting biogas generated in the process of leachate and food waste effluent treatment
and minimizing odor to generate power and fuel with the collected biogas


Photo Procedure Expected effects
Fuelization of biogas Hydrogen sulfide is removed from biogas via desulfurization → Biogas is used as generator fuel → Electricity is generated
  • • Power generation → revenue creation
  • • Reduce greenhouse gas and improve air quality
Removal of hydrogen sulfide in biogas through desulfurization facility → Supply to biogas purification facility → Production of automobile fuel
  • • Produce automobile fuel by refining biogas
  • • Replace fossil fuels, reduce greenhouse gas and improve air quality
  • ※ Potential for future expansion into the hydrogen reforming business