Abstract
Municipal solid waste (MSW) management poses significant environmental and health risks due to lack of source segregation, and reliance on landfills. To address these challenges, a prototype segregator is designed to process MSW, eliminating the need for a bio-drying process. A lab-scale density media separator (DMS) is developed for pre-experimentation and feasibility analysis of nine samples ranging from 100 to 500 g. Feasibility analysis indicates the possibility of the proposed process being implemented as a prototype and also creates the baseline considerations for designing the prototype segregator. Performance analysis of the prototype reveals the segregation of mixed MSW into plastic waste (lower specific density, larger particle size: 30–50 mm) with recovery of 81%, while Inert waste (higher specific density, smaller particle size: 5–45 mm) with recovery of 42%; and degradable waste (specific density closer to water and particle size 5–20 mm) with recovery of 78%. Furthermore, parametric optimization redefines the recovery of plastic by 78% (at 55 mm particle size, 300–400 L water), degradable by 48% (at 40 mm particle size, 250–375 L water, agitation 21.8–10.9 min). Thus the proposed system offers promising solutions to improve MSW management and alleviate environmental impact.
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Abbreviations
- MSW::
-
Municipal solid waste
- MSWM::
-
Municipal solid waste management
- DMS::
-
Density media separation
- PW::
-
Plastic waste
- DW::
-
Degradable waste
- IW::
-
Inert waste
- WSP::
-
Waste separation press
- CNN::
-
Computer neural network
References
Worldbank, Urban population (% of total population) – India | Data. Worldbank. https://data.worldbank.org/indicator/SP.URB.TOTL.IN.ZS?locations=IN. Accessed 10 Sept 2023
Statista (2017) Municipal solid waste generation globally by select country. Statista. https://www.statista.com/statistics/916749/global-generation-of-municipal-solid-waste-by-country/. Accessed 8 Jan 2023
Agarwal R, Chaudhary M, Singh J (2015) Waste management initiatives in India for human well being. Eur Sci J June, no. Special Edition:1857–7881. http://home.iitk.ac.in/~anubha/H16.pdf. Accessed 21 May 2019
Zhang X, Liu C, Chen Y, Zheng G, Chen Y (2021) Source separation, transportation, pretreatment, and valorization of municipal solid waste: a critical review. Environ Dev Sustain 24:11471–11513. https://doi.org/10.1007/S10668-021-01932-W
Rahmandoust A, Hafezalkotob A, Rahmani Parchikolaei B, A. (2023) Azizi, government intervention in municipal waste collection with a sustainable approach: a robust bi-level problem. Environ Dev Sustain 25(4):3323–3351. https://doi.org/10.1007/S10668-022-02181-1/FIGURES/9
Dai F, Chen Y (2023) Integrated dynamic municipal solid waste transfer station location decision study based on the dynamic MSW generation. Environ Dev Sustain 25(7):6033–6047. https://doi.org/10.1007/S10668-022-02292-9/METRICS
Dharia SV, Khushwah AJ, Choudhari CM, Kavre MS (2023) Optimum source segregation bin for household solid waste and waste plastic recycling. J Mater Cycles Waste Manag 25(4):2312–2325. https://doi.org/10.1007/S10163-023-01689-6/METRICS
Widyatmika MA, Bolia NB (2023) Understanding citizens’ perception of waste composting and segregation. J Mater Cycles Waste Manag 25(3):1608–1621. https://doi.org/10.1007/S10163-023-01636-5/FIGURES/4
Mandpe A, Bhattacharya A, Gedam VV, Paliya S, Hussain A, Kumar S (2023) A life cycle analysis-based comprehensive study on municipal solid waste management: a case study of central India. Environ Dev Sustain 2023:1–20. https://doi.org/10.1007/S10668-023-03548-8
Shukla P, Sharma PK, Pandey S, Chintala V (2021) Unsegregated municipal solid waste in India-current scenario challenges and way forward. NEPT. https://doi.org/10.46488/NEPT.2021.v20i02.048
Rajkumar J, Sirajuddin A (2016) Status and challenges of municipal solid waste management in India: a review. Cogent Environ Sci 2(1):1–18. https://doi.org/10.1080/23311843.2016.1139434
Pandey S, Malik JK (2015) Industrial and urban waste management in India. Available: https://www.teriin.org/projects/green/pdf/National-Waste.pdf. Accessed 11 Mar 2022
Wright S (2020) PART 3: Different methods of sorting and preparing waste | waste management. Inciner8 Limited. https://www.inciner8.com/blog/waste-management/part-3-different-methods-of-sorting-preparing-waste/. Accessed 18 July 2021
Lemann MF (2008) Waste management. Peter Lang, https://books.google.com/books/about/Waste_Management.html?id=bjhC3fKkGbgC. Accessed 7 July 2020
Tillman DA, Duong DNB, Harding NS (2012) Waste fuel-coal blending. Solid Fuel Blending. https://doi.org/10.1016/B978-0-12-380932-2.00005-2
Zhang Y, Kusch-Brandt S, Gu S, Heaven S (2019) Particle size distribution in municipal solid waste pre-treated for bioprocessing. Resources 8(4):166. https://doi.org/10.3390/RESOURCES8040166
Sullivan JF (2013) Screening. Theory Pract. https://doi.org/10.1201/9780429179587
Paraschiv G et al (2021) Optimization issues of a hammer mill working process using statistical modelling. Sustain 13(2):973. https://doi.org/10.3390/SU13020973
Chen L, Xiong D (2015) Magnetic techniques for mineral processing. prog Filtr Sep. Elsevier, pp 287–324
Tun MM, Juchelková D (2019) Drying methods for municipal solid waste quality improvement in the developed and developing countries: a review. Environ Eng Res 24(4):529–542. https://doi.org/10.4491/eer.2018.327
Bhatsada A et al (2023) Improvement of energy recovery potential of wet-refuse-derived fuel through bio-drying process. J Mater Cycles Waste Manag 25(2):637–649. https://doi.org/10.1007/S10163-022-01545-Z/FIGURES/9
Health and safety executive. Waste management: sorting/processing of waste. health and safety executive. https://www.hse.gov.uk/waste/processing.htm. Accessed 18 July 2021.
Sambyal SS, Agarwal R (2018) Forum of cities that segregate. https://www.cseindia.org/model-framework-for-segregation-8603. Accessed 3 May 2021
Srichandan H, Mohapatra RK, Parhi PK, Mishra S (2019) Bioleaching approach for extraction of metal values from secondary solid wastes: a critical review. Hydrometallurgy 189:105122. https://doi.org/10.1016/j.hydromet.2019.105122
Srinilta C, Kanharattanachai S (2019) Municipal Solid Waste Segregation with CNN. 2019 5th International conference on engineering applied sciences and technology ICEAST. Germany
Al Rakib MA, Rana MS, Rahman MM, Abbas FI (2021) Dry and wet waste segregation and management system. Eur J Eng Technol Res 6(5):129–133. https://doi.org/10.24018/ejers.2021.6.5.2531
Annepu RK (2012) Sustainable solid waste management in India. Columbia Univ 2:1–89
Miliute-Plepiene J, Fråne A, Almasi AM (2021) Overview of polyvinyl chloride (PVC) waste management practices in the Nordic countries. Clean Eng Technol 4:100246. https://doi.org/10.1016/j.clet.2021.100246
Indian centre for plastics in the environment (ICPE). ICPE polyvinyl chloride (PVC) a unique polymer. https://icpe.in/polyvinyl_Chloride.htm. Accessed 5 Feb 2023
CPCB (2015) Assessment & Characterisation of Plastic Waste Generation in 60 Major Cities – Central pollution control board (CPCB) Ministry of Environment, Forest & Climate Change. Pollut. Control Board. India, Cent, p 92
ASTM international. ASTM D6683–19 Standard test method for measuring bulk density values of powders and other bulk solids as function of compressive stress. https://www.astm.org/Standards/D6683.htm. Accessed 23 Oct 2020
ASTM international. ASTM D570–98 (2018) Standard test method for water absorption of plastics. https://www.astm.org/Standards/D570. Accessed 23 Oct 2020
ASTM international. ASTM D4442 - 20 Standard test methods for direct moisture content measurement of wood and wood-based materials. https://www.astm.org/Standards/D4442.htm. Accessed 23 Oct 2020
Michaud D (2016) Sink and float separation process. 911metallurgy corp’s private library. https://www.911metallurgist.com/blog/sink-float-separation-process. Accessed 6 Apr 2020
Eriez floatation. Hydrofloat separator. Eriezfloatation. https://www.eriezflotation.com/pdfs/FGB105Hydrofloat.pdf. Accessed 10 July 2020
Haith Group. Sink float tanks/floatation tanks and de-stoning equipment from the Haith Group. https://www.haith-recycling.com/sink_float_tank_stone_separation_de-stoning.html. Accessed 15 Mar 2021
Amstar Machinery. Plastic recycling machines - plastic pelletizers, shredders and granulators. https://www.plasticrecyclingmachine.net/. Accessed 10 July 2020
Michaud D (2015) Tromp curve–example of partition curve, 911metallurgist. https://www.911metallurgist.com/blog/tromp-curve-example-partition-curve. Accessed 28 Apr 2020
Firth B, Hart G (2008) Some aspects of modeling partition curves for size classification. Int J Coal Prep Util 28(3):174–187. https://doi.org/10.1080/19392690802274740
Kumar D, Kumar D (2018) Coking coal washing, no. Ccl. https://doi.org/10.1016/b978-0-12-812632-5.00007-0
Lambert N, Ryan G (2011) Multiple partition curve analysis estimate sampling induced uncertainty. 5th World Conference on Smapling and Blending. Santiago, Chile
Shukla P, Sharma PK, Pandey S (2023) Experimental investigation of lab scaled sink and float-based segregation process for mixed municipal solid waste. Int J Environ Waste Manag 32(1):98–112. https://doi.org/10.1504/IJEWM.2023.132128
Dlamini MF, Powell MS, Meyer CJ (2005) A CFD simulation of a single phase hydrocyclone flow field. J South Afr Inst Min Metall 105:711–718
Pascoe RD (2006) Investigation of hydrocyclones for the separation of shredded fridge plastics. Waste Manag 26:1126–1132. https://doi.org/10.1016/j.wasman.2005.06.017
Shah M (2012) Course material process engineering: agitation and mixing. http://www.dduanchor.org/site/wp-content/uploads/2014/11/Process-Engineering-Agitation-Mixing.pdf. Accessed 20 Oct 2021
CD fluid (2020) Agitator impeller types –tank agitator mixer manufacturer of China. http://cdfluid.com/agitator-impeller-types/. Accessed 23 Feb 2020
Dynamix Agitators (2013) Mixing 101: flow patterns and impellers dynamix agitators. https://dynamixinc.com/mixing-101-the-basic-principles-of-mixing-and-impellers/. Accessed 23 Feb 2020
Abster equipment. Types of agitators, agitators design and usages for mixing. http://www.sigmamixerkneader.com/types-of-agitators-design-and-usage/. Accessed 23 Feb 2020
Jirout T, Rieger F (2011) Impeller design for mixing of suspensions. Chem Eng Res Des 89(7):1144–1151. https://doi.org/10.1016/j.cherd.2010.12.005
Shukla P, Sharma PK, Pandey S, Shastry GG, Chinatala V, Choudhary S (2023) A mixed municipal waste segregation system. IPR India, 436823, 2023
Shukla P, Sharma PK, Pandey S, Shastry GG, Chinatala V, Choudhary S (2021) Design of ‘a mixed municipal waste segregation system’. IPR India, 331395–001, 2021
Ministry of new and renewable energy (2016) In: Standing committee on energy (2015–16). Available: http://164.100.60.131/lsscommittee/Energy/16_Energy_24.pdf. Accessed 23 Jan 2020
Sharholy M, Ahmad K, Mahmood G, Trivedi RC (2008) Municipal solid waste management in Indian cities — a review. Waste Manag 28(2):459–467. https://doi.org/10.1016/j.wasman.2007.02.008
Shwetmala, Chanakya H, Ramachandra T (2011) ICON SWM 2011 2 nd International conference on solid waste management and exhibition assessment of solid wastes choking open sewers and vulnerability to urban flooding. Accessed 08 Sep 2017. http://wgbis.ces.iisc.ernet.in/energy/paper/iconswm_urban_flooding/ufsw.pdf. Accessed 8 Sept 2017
Padilla AJ, Trujillo JC (2017) Waste disposal and households’ heterogeneity identifying factors shaping attitudes towards source-separated recycling in bogotá Colombia. Waste Manag. https://doi.org/10.1016/j.wasman.2017.11.052
Yaqoob M (2018) Much-hyped waste segregation at source non-starter greater Kashmir. Greaterkasmir.com. https://www.greaterkashmir.com/news/srinagar/much-hyped-waste-segregation-at-source-non-starter/. Accessed 15 June 2019.
Swati Singh Sambyal R A (2018) Is Swachh bharat mission ensuring waste segregation systems?. Down to Earth. https://www.downtoearth.org.in/blog/waste/is-swachh-bharat-mission-ensuring-waste-segregation-systems--61885. Accessed 15 June 2019.
CPCB (2018) CPCB annual report as per MSW rules 2016. Available: https://cpcb.nic.in/uploads/MSW/MSW_AnnualReport_2017-18.pdf. Accessed Jan 20 2020
Shukla P, Choudhary S (2022) A critical review of the impact of covid-19 on plastic and food waste. Nat Environ Pollut Technol 21(5):2283–2290
Feed mill machinery glossary. Hammer mills. feed mill machinery glossary. https://www.feedmachinery.com/glossary/equipment/hammer_mill/. Accessed 26 Sep 2021
Air separator to separate different fractions N M Heilig. https://www.heiligbv.com/products/air-separator/. Accessed 02 Feb 2024
Michaud LD. Hammer Mill Operating Principle. https://www.911metallurgist.com/blog/hammer-milloperating-principle. Accessed 7 May 2020
Trommel screen machine mechanical screening idea wikipedia, PNG, 900x400px, trommel screen, auto part, compost, conveyor belt, definition download free. https://favpng.com/png_view/municipal-solid-waste-trommel-screen-machine-mechanical-screening-idea-wikipedia-png/N4z8kriX. Accessed 26 Sep 2021.
Perazzini H, Freire FB, Freire FB, Freire JT (2016) Thermal treatment of solid wastes using drying technologies: a review. Drying Technol 34:39–52. https://doi.org/10.1080/07373937.2014.995803
Al-Salem SM, Lettieri P, Baeyens J (2009) Recycling and recovery routes of plastic solid waste (PSW): a review. Waste Manag 29(10):2625–2643. https://doi.org/10.1016/j.wasman.2009.06.004
Serranti S, Bonifazi G (2019) “Techniques for separation of plastic wastes”, in use of recycled plastics in eco-efficient concrete. Elsevier. https://doi.org/10.1016/b978-0-08-102676-2.00002-5
Ministry of housing and urban affairs Standing committee on urban development, solid waste management including hazardous waste, medical waste and e-waste twenty. 2019. [Online]. Available: http://164.100.47.193/lsscommittee/Urban Development/16_Urban_Development_25.pdf. Accessed 11 Aug 2019
Waste sorting - A look at the separation and sorting techniques in today’s European market | WMW. https://waste-management-world.com/artikel/waste-sorting-a-look-at-the-separation-and-sorting-techniques-in-today-rsquo-s-european-market/. Accessed 13 Aug 2022
Jank A, Müller W, Schneider I, Gerke F, Bockreis A (2015) Waste Separation Press (WSP): a mechanical pretreatment option for organic waste from source separation. Waste Manag 39:71–77. https://doi.org/10.1016/j.wasman.2015.02.024
Jribi S, Ben Ismail H, Doggui D, Debbabi H (2020) COVID-19 virus outbreak lockdown: what impacts on household food wastage? Environ Dev Sustain 22:3939–3955. https://doi.org/10.1007/s10668-020-00740-y
Protega Global (2021) Which is more eco-friendly...paper, or biodegradable plastic?–Protega Global. https://protega-global.com/2021/01/05/which-is-more-eco-friendly-paper-or-biodegradable-plastic/. Accessed 28 Dec 2022.
Smith DS (2019)Advantages of cardboard for the environment. https://www.dssmith.com/tecnicarton/about/newsroom/2019/6/advantages-of-cardboard-for-the-environment. Accessed 28 Dec 2022
Andrew Krosofsky (2021) What Fabrics Are Biodegradable?. https://www.greenmatters.com/p/what-fabrics-are-biodegradable. Accessed 30 Dec 2022
Kharlamov E (2018) Determination of the magnetic separator separation function. MATEC Web Conf 251:4–11. https://doi.org/10.1051/matecconf/201825103027
Eddy Current Separator : ZAR. https://zar-ch.ch/en/home/competencesprojects/optimizations/eddy-current-separator/. Accessed 02 Feb 2024.
Chowdhury R, Billah MM, Roy S, Banik SC, Barua A (2024) Analyzing the effect of the density of medium on efficiency of hydrocyclone separator in sorting of PVC and PET using CFD. Results Mater 21:100497. https://doi.org/10.1016/J.RINMA.2023.100497
Fu S, Qian Y, Yuan H, Fang Y (2022) Effect of cone angles of a hydrocyclone for the separation of waste plastics with low value of density difference. Waste Manag 140:183–192. https://doi.org/10.1016/J.WASMAN.2021.11.028
Kökkılıç O, Mohammadi-Jam S, Chu P, Marion C, Yang Y, Waters KE (2022) Separation of plastic wastes using froth flotation – An overview. Adv Colloid Interface Sci 308:102769. https://doi.org/10.1016/J.CIS.2022.102769
SDS windshifter air separator recycling - Nihot. https://nihot.nl/products/sds-windshifter/. Accessed 11 Dec 2022
Air Separator - pneumatic separator erga zzflow. https://ergaglobal.com/catalog/gravity-separators/zig-zag-air-separator/. Accessed 01 Feb 2024.
Acknowledgements
This research work was supported by SEED, UPES, Dehradun, India. We thank the R&D Deptt. UPES, Dehradun, India, for providing all the infrastructural support to perform this research work.
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Shukla, P., Sharma, P.K., Pandey, S. et al. Optimizing municipal solid waste recovery through density-based waste plastic segregation. J Mater Cycles Waste Manag (2024). https://doi.org/10.1007/s10163-024-01971-1
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DOI: https://doi.org/10.1007/s10163-024-01971-1