Figure 2

van Krevelen diagram for sewage sludge (SS) and sewage sludge biochar (SSB) produced at the pyrolysis temperatures of 350 (SSB350), 450 (SSB450) and 600 (SSB600).

van Krevelen diagram for sewage sludge (SS) and sewage sludge biochar (SSB) produced at the pyrolysis temperatures of 350 (SSB350), 450 (SSB450) and 600 (SSB600).