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Outline
This study evaluates the carbon mitigation potential of municipal solid waste (MSW) management strategies in Chengdu by integrating multi-scenario simulations with a refined classification-based accounting framework. The existing system faces compounded challenges, including inadequate source separation, limited source reduction, low resource recovery rates, and a high-emission treatment structure dominated by landfilling and energy-intensive technologies. The results demonstrate that different strategies prevail at distinct stages of the transition. In the short term (2020~2027), a full-incineration strategy reduces net emissions from 4169 to 1314.7kt CO2-eq, accounting for 95.4% of cumulative reductions. In the midterm (2028~2035), source reduction increasingly alleviates downstream treatment pressure. In the long term (post-2035), system optimization—through improved incineration performance and sludge co-treatment—enhances synergies and carbon sink effects. Among individual strategies, enhanced resource utilization (S4) yields the most immediate mitigation effect, whereas source reduction (S2) generates substantial long-term cumulative benefits. The integrated strategy (S7) outperforms all single-strategy options across most waste categories, underscoring the need for full-chain, coordinated governance. Overall, the findings highlight the importance of differentiated, time-phased, and waste-type-specific policy interventions to enable a low-carbon transition in urban MSW systems.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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