18 Study on the Quantitative Evaluation of Greenhouse Gas (GHG) …
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Table 18.5
GHG emissions from different sources for the nine sewage-sludge treatment scenarios (kgCO
2 e/d)
Total
Sewage treatment
Sludge treatment
Direct GHG emissions
Indirect GHG emissions
Direct GHG emissions
Indirect GHG emissions
CO2
N2O
Chemicals
Electricity
AAO
landfill
S1
3.44E+05
5.64E+03
2.78E+05
1.65E+01
4.03E+04
1.99E+04
2.74E+02
comp.
S2
3.47E+05
5.64E+03
2.78E+05
1.65E+01
4.03E+04
2.30E+04
1.43E+01
comb.
S3
3.34E+05
5.64E+03
2.78E+05
1.65E+01
4.03E+04
8.88E+03
1.62E+03
OD
landfill
S4
3.35E+05
3.45E+04
1.66E+05
4.10E+02
8.06E+04
5.24E+04
7.23E+02
comp.
S5
3.42E+05
3.45E+04
1.66E+05
4.10E+02
8.06E+04
6.07E+04
3.79E+01
comb.
S6
3.09E+05
3.45E+04
1.66E+05
4.10E+02
8.06E+04
2.34E+04
4.29E+03
SBR
landfill
S7
1.62E+05
2.57E+04
6.02E+04
3.86E+01
6.78E+04
7.94E+03
1.10E+02
comp.
S8
1.63E+05
2.57E+04
6.02E+04
3.86E+01
6.78E+04
9.19E+03
5.74E+00
comb.
S9
1.58E+05
2.57E+04
6.02E+04
3.86E+01
6.78E+04
3.55E+03
6.49E+02