Table 1.
Summary of scenarios and determination of the patterns of the recycling rate in the developed variants
| Scenario number | Scenario description | Determining the pattern – variant I | Determining the pattern – variant II |
|---|---|---|---|
| Scenario 1 | the recycling rate is calculated as the ratio of the weight of paper, metal, plastic and glass (PMPG) prepared for re-use and recycling to the weight of total municipal waste generated | where: P – level of preparation for re-use and recycling of municipal waste, %, Mrpmpg – total mass of paper, metal, plastic and glass waste prepared for re-use and recycling, Mg, MwREAL – total mass of generated (collected) municipal waste, Mg | where: P – level of preparation for re-use and recycling of municipal waste, %, Mrpmpg – total mass of paper, metal, plastic and glass waste prepared for re-use and recycling, Mg, MwCSO – total mass of generated municipal waste, Mg |
| Scenario 2 | the recycling rate is calculated as the ratio of the weight of paper, metal, plastic and glass waste prepared for re-use and recycling, and bio-waste transferred to the recycling process (input into the recycling process) to the total weight of municipal waste generated | where: P – level of preparation for re-use and recycling of municipal waste,%, Mrpmpg+BIOrec – total weight of paper, metal, plastic, glass and recycled bio-waste, Mg, MwREAL – total mass of generated (collected) municipal waste, Mg | where: P – level of preparation for re-use and recycling of municipal waste, %, Mrpmpg+BIOrec – total weight of paper, metal, plastic, glass and recycled bio-waste, Mg, MwCSO – total mass of generated municipal waste, Mg |
| Scenario 3 | the recycling rate is calculated as the ratio of the weight of paper, metal, plastic and glass waste and bio-waste collected and collected selectively in municipal waste management systems to the total weight of municipal waste generated | where: P – level of preparation for re-use and recycling of municipal waste, %, Mrsel(pmpg+BIO) – total mass of separately collected waste paper, metals, plastics, recycled glass and bio-waste, Mg, MwREAL – total mass of generated (collected) municipal waste, Mg | where: P – the level of preparation for re-use and recycling of municipal waste, expressed in %, Mrsel(pmpg+BIO) – total mass of separately collected waste paper, metals, plastics, recycled glass and bio-waste, Mg, MwCSO – total mass of generated municipal waste, Mg |
Table 2.
Recycling rates [%] in the analyzed scenarios in two variants
| Description | Large municipalities Recycling rate [%] | Medium municipalities Recycling rate [%] | Small municipalities Recycling rate [%] | Average value of the recycling rate [%] | ||
|---|---|---|---|---|---|---|
| Scenario number | Variant Number | |||||
| Scenario 1 | Variant I | 12.96 | 15.08 | 12.22 | 13.42 | 16.65 |
| Variant II | 18.48 | 21.20 | 19.94 | 19.87 | ||
| Scenario 2 | Variant I | 21.74 | 17.37 | 16.52 | 16.52 | 22.95 |
| Variant II | 31.03 | 24.12 | 26.90 | 26.90 | ||
| Scenario 3 | Variant I | 29.38 | 33.12 | 18.26 | 18.26 | 33.55 |
| Variant II | 42.72 | 47.99 | 29.81 | 29.81 | ||
Figure 1.
Investment gap and investment outlays in the treatment of municipal waste. Source: Own study based on data from KPGO 2022 [18]
Figure 2.
Tendency of changes in the recycling rate [%] in the adopted variants. Source: Own study
Table 3.
Recycling rates [%] in the analysed scenarios according to two variants for GMK in 2018-2020
| Description | 2018 | 2019 | 2020 | |
|---|---|---|---|---|
| Recycling levels achieved by the City of Krakow | 42.00 | 55.92 | 69.49 | |
| Scenario number | Variant Number | Recycling rate [%] | Recycling rate [%] | Recycling rate [%] |
| Scenario 1 | Variant I | 12.78 | 14.04 | 17.35 |
| Variant II | 20.92 | 22.88 | 26.91 | |
| Scenario 2 | Variant I | 18.14 | 19.67 | 27.52 |
| Variant II | 29.69 | 32.05 | 42.66 | |
| Scenario 3 | Variant I | 32.20 | 34.26 | 40.55 |
| Variant II | 52.71 | 55.83 | 62.88 | |