Skip to main content

Table 6 Environmental impacts from the production of mineral fertilizers options (Ecoinvent v.3.6 database)

From: Life cycle analysis of potential municipal solid wastes management scenarios in Tanzania: the case of Arusha City

Category

Unit

 

Value

Total

Fertilizer (Nitrogen)

Fertilizer

(Phosphate)

Fertilizer

(Potassium)

Fresh water eutrophication

kg P eq

SN-2

5.1 × 10 - 4

7.8 × 10 −4

1.2 × 10 - 4

1.4 × 10 − 3

SN-3

6.3 × 10 - 4

4.3 × 10 − 4

2.0 × 10 - 5

1.1 × 10 − 3

Human toxicity

kg1,4-DCB eq

SN-2

0.99

0.54

0.19

1.7

SN-3

1.2

0.3

0.03

1.6

Particulate matter formation

kg PM10

SN-2

4.9 × 10 - 3

3.7 × 10 −3

1.4 × 10 - 3

1.0 × 10 −2

SN-3

6.1 × 10 - 3

2.0 × 10 − 3

2.4 × 10 - 4

8.4 × 10 − 3

Fresh water ecotoxicity

kg 1,4-DCB eq

SN-2

0.15

0.07

0.02

2.4 × 10 −1

SN-3

0.18

0.04

3.02 × 10 - 3

2.2 × 10 − 1

Climate change

kg CO2 eq

SN-2

3.6

0.7

0.68

5.0

SN-3

4.5

0.38

0.12

5.0

Terrestrial ecotoxicity

kg 1,4-DCB eq

SN-2

2.8 × 10 - 4

2.8 × 10 −4

1.2 × 10 - 4

6.8 × 10 − 4

SN-3

3.5 × 10 - 4

1.5 × 10 − 4

2.1 × 10 - 5

5.2 × 10 − 4

Photochemical oxidant formation

kg NMVOC eq

SN-2

9.0 × 10 - 3

3.2 × 10 −3

3.3 × 10 - 3

1.5 × 10 −2

SN-3

0.01

1.7 × 10 −3

5.6 × 10 - 4

1.2 × 10 − 2

Terrestrial acidification

kg SO2 eq

SN-2

0.02

7.7 × 10 − 3

3.6 × 10 - 3

3.1 × 10 − 2

SN-3

0.02

4.2 × 10 − 3

6.1 × 10 - 4

2.5 × 10 − 2

  1. SN-2; (RCL_CP_LF) and SN-3; (RCL_AD_LF), where RCL Recycling, LF Landfilling, CP Composting, AD Anaerobic digestion, DCB Dichlorobenzene, NMVOC Non-methane volatile organic compounds