Due to the expanding demand for plastics, waste polyethylene (PE) management has become a global challenge. This study focuses on two pivotal techniques applicable for waste PE utilization as life cycle scenarios, that is, (1) polymer-modified asphalt production and (2) pyrolysis oil production. The study applies standard life cycle assessment (LCA) methodology to evaluate life cycle material flows, energy flows and environmental impacts for the two scenarios processing 1 tonne of waste PE in municipal solid wastes. Utilization of waste PEs at a ratio of 250 tonnes of polymer-modified asphalt/tonne of waste saves 8.19% of energy compared to the normal asphalt preparation process. At the same time, pyrolysis yields a net energy ratio of 1.07. Moreover, results reveal that utilizing waste PEs for polymer-modified asphalt production is more environmentally benign compared to pyrolysis. These implications have significant variations mainly due to yield parameters. Further interpretation of LCA results and sensitivity parameters are analysed to support future implementations.
AbdyCZhangYWangJ, et al. (2022) Pyrolysis of polyolefin plastic waste and potential applications in asphalt road construction: A technical review. Resources, Conservation and Recycling180: 106213.
2.
AisienFAAisienET (2023) Production and characterization of liquid oil from the pyrolysis of waste high-density polyethylene plastics using spent fluid catalytic cracking catalyst. Sustainable Chemistry for Climate Action2: 100020.
3.
AntelavaADamilosSHafeezS, et al. (2019) Plastic solid waste (PSW) in the context of life cycle assessment (LCA) and sustainable management. Environmental Management64(2): 230–244.
4.
AntelavaAJablonskaNConstantinouA, et al. (2021) Energy potential of plastic waste valorization: a short comparative assessment of pyrolysis versus gasification. Energy & Fuels35(5): 3558–3571.
5.
AsterayDBElsaighWA (2024) Waste plastic to roads – HDPE-modified Bitumen and PET plastic fibres for road maintenance in South Africa: A review. Waste Management & Research42(10): 932–946.
6.
AttiqueSBatoolMYaqubM, et al. (2020) Highly efficient catalytic pyrolysis of polyethylene waste to derive fuel products by novel polyoxometalate/kaolin composites. Waste Management & Research38(6): 689–695.
7.
BäckströmEOdeliusKHakkarainenM (2017) Trash to treasure: Microwave-assisted conversion of polyethylene to functional chemicals. Industrial & Engineering Chemistry Research56(50): 14814–14821.
8.
BudsaereechaiSHuntAJNgernyenY (2019) Catalytic pyrolysis of plastic waste for the production of liquid fuels for engines. RSC Advances9(10): 5844–5857.
9.
ButtAABirgissonBKringosN (2016) Considering the benefits of asphalt modification using a new technical life cycle assessment framework. Journal of Civil Engineering and Management22(5): 597–607.
10.
ChenLLiuWYangT, et al. (2023) Probabilistic material flow analysis of eight commodity plastics in China: Comparison between 2017 and 2020. Resources, Conservation and Recycling191: 106880.
11.
ChhabraVParasharAShastriY, et al. (2021) Techno-economic and life cycle assessment of pyrolysis of unsegregated urban municipal solid waste in India. Industrial & Engineering Chemistry Research60(3): 1473–1482.
12.
DiazLZhangKPhanA (2018) Monomer recovery through advanced pyrolysis of waste high density polyethylene (HDPE). RSC Green Chemistry20(8): 1813–1823.
13.
EnfrinMGiustozziF (2022) Recent advances in the construction of sustainable asphalt roads with recycled plastic. Polymer International71(12): 1376–1383.
14.
EricksonE (2024) Shaping a federal strategy for chemical recycling: Moving toward sensible applications of emerging technologies in US plastic waste management. Environmental Progress & Sustainable Energy43(1): e14333.
15.
FerronatoNGorritty PortilloMAGuisbert LizarazuEG, et al. (2020) Application of a life cycle assessment for assessing municipal solid waste management systems in Bolivia in an international cooperative framework. Waste Management & Research38(1_suppl): 98–116.
16.
FerronatoNMaaloufAMertenatA, et al. (2024) A review of plastic waste circular actions in seven developing countries to achieve sustainable development goals. Waste Management & Research42(6): 436–458.
17.
GradyBP (2021) Waste plastics in asphalt concrete: A review. SPE Polymers2(1): 4–18.
18.
IdumahCINwuzorIC (2019) Novel trends in plastic waste management. SN Applied Sciences1(11): 1402.
19.
JeswaniHKrügerCRussM, et al. (2021) Life cycle environmental impacts of chemical recycling via pyrolysis of mixed plastic waste in comparison with mechanical recycling and energy recovery. Science of the Total Environment769: 144483.
20.
JiangJShiKZhangX, et al. (2022) From plastic waste to wealth using chemical recycling: A review. Journal of Environmental Chemical Engineering10(1): 106867.
21.
JiangQWangFLiuQ, et al. (2021) Energy consumption and environment performance analysis of induction-healed asphalt pavement by life cycle assessment (LCA). Materials14(5): 1244.
22.
JoshiCSeayJBanaddaN (2019) A perspective on a locally managed decentralized circular economy for waste plastic in developing countries. Environmental Progress & Sustainable Energy38(1): 3–11.
23.
KassargyCAwadSBurnensG, et al. (2017) Experimental study of catalytic pyrolysis of polyethylene and polypropylene over USY zeolite and separation to gasoline and diesel-like fuels. Journal of Analytical and Applied Pyrolysis127: 31–37.
24.
KhooHH (2019) LCA of plastic waste recovery into recycled materials, energy and fuels in Singapore. Resources, Conservation and Recycling145: 67–77.
25.
Kokusai Kogyo Co., Ltd. (2016) Data Collection Survey on Solid Waste Management in the Democratic Socialist Republic of Sri Lanka. Japan International Cooperation Agency (JICA)16: 29. Available at: https://openjicareport.jica.go.jp/pdf/12250213.pdf (accessed 11 November 2024).
26.
LaoJSongHWangC, et al. (2021) Reducing atmospheric pollutant and greenhouse gas emissions of heavy duty trucks by substituting diesel with hydrogen in Beijing-Tianjin-Hebei-Shandong region, China. International Journal of Hydrogen Energy46(34): 18137–18152.
27.
LiuXLeiTBoréA, et al. (2022) Evolution of global plastic waste trade flows from 2000 to 2020 and its predicted trade sinks in 2030. Journal of Cleaner Production376: 134373.
28.
Martín-LaraMAMorenoJAGarcia-GarciaG, et al. (2022) Life cycle assessment of mechanical recycling of post-consumer polyethylene flexible films based on a real case in Spain. Journal of Cleaner Production365: 132625.
29.
NizamuddinSJamalMGravinaR, et al. (2020) Recycled plastic as bitumen modifier: The role of recycled linear low-density polyethylene in the modification of physical, chemical and rheological properties of bitumen. Journal of Cleaner Production266: 121988.
30.
PaliukaiteMVaitkusAZofkaA (2014) Evaluation of bitumen fractional composition depending on the crude oil type and production technology. Proceedings of the International Conference on Environmental Engineering9: 1–7.
31.
PhanisankarBSSVasudeva RaoNManikantaJE (2020) Conversion of waste plastic to fuel products. Materials Today: Proceedings33: 5190–5195.
32.
PiaoZMikhailenkoPKakarMR, et al. (2023) Comparative environmental analysis for using waste polyethylene and steel slag in semi-dense asphalt pavements. Journal of Testing and Evaluation51(4): 1912–1923.
33.
Pires CostaLVaz de MirandaDMPintoJC (2022) Critical evaluation of life cycle assessment analyses of plastic waste pyrolysis. ACS Sustainable Chemistry & Engineering10(12): 3799–3807.
34.
RahmadSMd YusoffNIFadzilSM, et al. (2021) The effects of polymer modified asphalt binder incorporating with chemical warm mix additive towards water quality degradation. Journal of Cleaner Production279: 123698.
35.
RahmanMNAhmeduzzamanMSobhanMA, et al. (2013) Performance evaluation of waste polyethylene and PVC on hot asphalt mixtures. American Journal of Civil Engineering and Architecture1(5): 97–102.
36.
S AtmajaASetyawanAPranoloSH, et al. (2021) The use of energy in the production process of hot mix asphalt in asphalt mixing plant (AMP). Journal of Physics: Conference Series1912(1): 012060.
37.
SamarasingheKPawan KumarSVisvanathanC (2021) Evaluation of circular economy potential of plastic waste in Sri Lanka. Environmental Quality Management31(1): 99–107.
38.
SantosJPhamAStasinopoulosP, et al. (2021) Recycling waste plastics in roads: A life-cycle assessment study using primary data. Science of the Total Environment751: 141842.
39.
SantosMBDCandidoJBauléSDS, et al. (2020) Greenhouse gas emissions and energy consumption in asphalt plants. Revista Eletrônica em Gestão, Educação e Tecnologia Ambiental24: e7.
40.
SharuddinSDAAbnisaFDaudWMAW, et al. (2018) Pyrolysis of plastic waste for liquid fuel production as prospective energy resource. IOP Conference Series: Materials Science and Engineering334(1): 012001.
41.
Somoza-TornosAGonzalez-GarayAPozoC, et al. (2020) Realizing the potential high benefits of circular economy in the chemical industry: Ethylene monomer recovery via polyethylene pyrolysis. ACS Sustainable Chemistry & Engineering8(9): 3561–3572.
42.
Thoden van VelzenEUChuSAlvarado ChaconF, et al. (2021) The impact of impurities on the mechanical properties of recycled polyethylene. Packaging Technology and Science34(4): 219–228.
43.
TiwariRAzadNDuttaD, et al. (2023) A critical review and future perspective of plastic waste recycling. Science of the Total Environment881: 163433.
44.
UkardeTMPawarHS (2021) A Cu doped TiO2 catalyst mediated catalytic thermo liquefaction (CTL) of polyolefinic plastic waste into hydrocarbon oil. Fuel285: 119155.
45.
VanapalliKRSamalBDubeyBK, et al. (2019) Emissions and environmental burdens associated with plastic solid waste management. In: SalemSM (ed.) Plastics to Energy. William Andrew Publishing, pp. 313–342. Available at: https://linkinghub.elsevier.com/retrieve/pii/B9780128131404000121 (accessed 11 November 2024).
46.
VidalRMolinerEMartínezG, et al. (2013) Life cycle assessment of hot mix asphalt and zeolite-based warm mix asphalt with reclaimed asphalt pavement. Resources, Conservation and Recycling74: 101–114.
47.
WalkerTRFequetL (2023a) Current trends of unsustainable plastic production and micro(nano)plastic pollution. TrAC Trends in Analytical Chemistry160: 116984.
48.
XuFZhaoYLiK (2022) Using waste plastics as asphalt modifier: A review. Materials15(1): 110.
49.
XuMZhangY (2020) Analysis of leachate contaminants metals in polyphthalamide-modified asphalt and their environmental effects. Journal of Cleaner Production275: 123239.
50.
YouLLongZYouZ, et al. (2022) Review of recycling waste plastics in asphalt paving materials. Journal of Traffic and Transportation Engineering (English Edition)9(5): 742–764.
51.
ZhaoXKoreyMLiK, et al. (2022) Plastic waste upcycling toward a circular economy. Chemical Engineering Journal428: 131928.
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