Challenges and Priorities of Municipal Solid Waste Management in Cambodia
Abstract
:1. Introduction
2. Methodologies and Search Strategy
3. MSW Generation, Characteristics and Composition
3.1. MSW Generation
3.2. MSW Characteristics and Composition
4. Legislation and Policy Framework
5. Institutional Arrangement
6. MSW Management and Treatment
6.1. Generation and Storage
6.2. Collection and Transportation
6.3. Landfill and Disposal
6.4. Recycling
6.5. Composting
6.6. Open Burning
6.7. Incineration
7. Management and Treatment of MSW in Other Countries
7.1. The United States of America
7.2. Japan
7.3. China
7.4. India
7.5. Indonesia
7.6. Thailand
7.7. Vietnam
8. Challenges and Priorities
- (1)
- Competitive service provision. To avoid the environmental burden from uncollected waste and to increase the efficiency of the MSW collection service, the competitive tendering with a clear operational plan should be transparently performed, and the short-term contract adopted. Evidence of the deficiency of service provision was seen in Phnom Penh, where the service was monopolized for a long-term contract (49 years) [38];
- (2)
- Redefine service fee. Willingness to pay for the service is key to a successful MSW management system. A standard service fee setting model should be advised, notwithstanding different urban areas, and the successful experience from other countries should not be overlooked. i.e., “pay-as-you-throw” adopted in Japan, Korea, and Vietnam, or waste/sanitation tax in Switzerland and India;
- (3)
- Stakeholder engagement. Sustainable waste management cannot be achieved without involvement from all stakeholders, including the national government in developing policy and strategy frameworks, sub-national authorities in implementing the policy and management of the system, the private sector in providing the service, development partners in conducting research and development and providing financial support, and residents in waste separation;
- (4)
- Capacity building and awareness-raising. The participation of local people is a driving force in achieving the 3Rs strategy by reducing waste disposal and sorting out waste for recycling. Hence, environmental education is vital for both formal and informal education systems. Informal education can be made through environmental campaigns, media, and social media, while formal education can be made by integrating environmental education into the school curriculum. An incentive program should also be introduced, for example, the bonus point incentive system, implemented in some cities of China;
- (5)
- Promoting resource recovery. In a circular economy, waste is regarded as a resource. The private sector and local people get involved by reducing consumption and waste generation, reusing materials, recycling (recyclable and compostable), and recovering energy from the remaining materials before they up in landfill. The existing informal recyclers should be promoted and upgraded. WTE incineration has also been seen as an alternative to landfill. It diverts the waste that remains after recycling into energy or steam, reducing the environmental burden at the landfills and minimizing the investment in landfill construction. However, this system is highly technological and requires a huge investment cost, which requires a subsidy from the government to secure its sustainability;
- (6)
- Community-based solid waste management formation. Cambodia already has many forms of community-based organizations. Therefore, it is important to learn about the experience of Thailand and Indonesia in improving waste recycling and management via waste banks. The potential application of waste banks should be in schools, pagodas, communities, or a combination thereof;
- (7)
- Formulation of incentive provision. An enabling environment should be created for the MSW management sector by regulating incentive-supporting policy and strategy. Several incentive mechanisms include capital cost subsidy, import tax exemption, tax breaks, material bans, and material controls [1];
- (8)
- Application of advanced digital technologies in MSW management. The use of digital technology offers a new generation approach to improving waste management systems effectively. Artificial Intelligence (AI) has been seen as a powerful technology increasingly attaining popularity and application in many sectors, including MSW management [131]. The emerging technologies have been applied in many areas, including waste generation, bin level monitoring (Internet of Things), waste collection and vehicle route, waste sorting, waste treatment, and waste management planning [132]. Incorporating AI in MSW infrastructure has been successful in many developed countries in Europe, Asia, and America to increase the recycling rate, minimize labor, reduce cost, maximize efficiency, and improve management methods [131,132]. Hence, shifting conventional MSW management methods to AI-based systems should be an option for Cambodia to foster its circular economy strategy in the industry 4.0 era.
- (9)
- Enhancement of data collection. The unavailability of data is the critical barrier to developing management systems, designing treatment facilities, and financial resources allocation. Hence, to help the government and private sector develop a strong management plan, great efforts should be made to collect such extensive data and make them publicly available. The research and development on this topic should also be accelerated.
9. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Acknowledgments
Conflicts of Interest
References
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Year | Population (million) a | GDP a | MSW Generation (million ton) | Per Capita c (kg/day) | |||
---|---|---|---|---|---|---|---|
Per Capita (USD) | Annual (million USD) | Annual Growth (%) | b | c | |||
2008 | 13.88 | 746 | 10,352 | 6.69 | 3.74 | 3.71 | 0.73 |
2009 | 14.09 | 738 | 10,402 | 0.09 | 3.78 | 3.79 | 0.74 |
2010 | 14.31 | 786 | 11,242 | 5.96 | 3.85 | 3.85 | 0.74 |
2011 | 14.54 | 882 | 12,830 | 7.07 | 3.91 | 3.92 | 0.74 |
2012 | 14.78 | 951 | 14,054 | 7.31 | 3.99 | 3.99 | 0.74 |
2013 | 15.03 | 1013 | 15,228 | 7.36 | 4.09 | 4.06 | 0.74 |
2014 | 15.28 | 1093 | 16,703 | 7.14 | 4.16 | 4.14 | 0.74 |
2015 | 15.52 | 1163 | 18,050 | 7.12 | 4.18 | 4.41 | 0.78 |
2016 | 15.77 | 1270 | 20,017 | 6.94 | 4.24 | 4.49 | 0.78 |
2017 | 16.01 | 1385 | 22,177 | 6.84 | - | 4.58 | 0.78 |
2018 | 16.25 | 1512 | 24,572 | 7.47 | - | 4.67 | 0.79 |
2019 | 16.49 | 1643 | 27,089 | 7.05 | - | 4.69 | 0.78 |
2020 | 16.72 | 1513 | 25,291 | −3.14 | - | 4.78 | 0.78 |
Province | Waste Composition (%) | |||||||
---|---|---|---|---|---|---|---|---|
Food Waste | Paper | Plastic | Metals | Textile | Glass | Wood and Dry Matter | Other | |
Country a | 55 | 3 | 10 | 7 | - | 8 | - | 17 |
Phnom Penh b | 49 | 7 | 21 | 1 | 8 | 1 | 7 | 6 |
Battambang c | 71 | 2 | 10 | 3 | 2 | 4 | 6 | 2 |
Siem Reap c | 54 | 6 | 11 | 1 | 3 | 3 | 11 | 11 |
Kampong Cham c | 60 | 5 | 12 | 1 | 1 | 2 | 3 | 16 |
Kampong Chhnang d | 80 | 2 | 3 | 8 | 1 | 1 | - | - |
Pursat e | 50–65 | 2–4 | 10–15 | 2–6 | 2–4 | 4–6 | 1–2 | 10–15 |
Kampong Thom f | 61 | 5.3 | 13.5 | 0.6 | 3.7 | 2.6 | 3 | 4 |
No | Province/ Municipality | Cities/ Districts (number) | Cities/ Districts with Service (number) | MSW Generation (ton/day) | MSW Collection (ton/day) | Collection Efficiency (%) | Landfill (number) | Landfill Size (ha) | Incinerator (number) |
---|---|---|---|---|---|---|---|---|---|
1 | Banteay Meanchey | 9 | 9 | 310 | 228 | 74 | 11 | 45.50 | 2 |
2 | Battambang | 14 | 11 | 365 | 234 | 64 | 14 | 13.20 | 3 |
3 | Kampong Cham | 10 | 10 | 173 | 130 | 75 | 14 | 15.50 | 1 |
4 | Kampong Chhnang | 8 | 7 | 125 | 41 | 33 | 5 | 23.90 | - |
5 | Kampong Speu | 8 | 8 | 91 | 68 | 75 | 12 | 31.10 | 4 |
6 | Kampong Thom | 9 | 8 | 146 | 49 | 34 | 10 | 75.00 | 3 |
7 | Kampot | 9 | 8 | 98 | 77 | 79 | 8 | 13.10 | - |
8 | Kandal | 11 | 11 | 561 | 518 | 92 | 10 | 31.90 | 5 |
9 | Koh Kong | 7 | 4 | 106 | 106 | 100 | 2 | 4.30 | 1 |
10 | Kratie | 6 | 4 | 101 | 40 | 40 | 6 | 44.00 | 1 |
11 | Mondul Kiri | 5 | 4 | 20 | 11 | 55 | 4 | 25.50 | 2 |
12 | Phnom Penh | 14 | 14 | 3076 | 2830 | 92 | 1 | 31.00 | 6 |
13 | Preah Vihear | 8 | 3 | 63 | 31 | 49 | 5 | 28.50 | 3 |
14 | Prey Veng | 13 | 12 | 767 | 123 | 16 | 9 | 10.00 | 2 |
15 | Pursat | 7 | 7 | 331 | 301 | 91 | 11 | 7.50 | 2 |
16 | Ratanak Kiri | 9 | 4 | 87 | 20 | 23 | 6 | 16.50 | - |
17 | Siem Reap | 12 | 11 | 316 | 234 | 74 | 11 | 25.60 | 4 |
18 | Preah Sihanouk | 5 | 5 | 285 | 273 | 96 | 2 | 100.50 | 6 |
19 | Stung Treng | 6 | 1 | 65 | 22 | 34 | 2 | 101.00 | - |
20 | Svay Rieng | 8 | 8 | 381 | 224 | 59 | 4 | 4.50 | 1 |
21 | Takeo | 10 | 10 | 166 | 32 | 19 | 7 | 4.90 | 4 |
22 | Oddar Meanchey | 5 | 5 | 106 | 41 | 39 | 4 | 19.70 | 1 |
23 | Kep | 2 | 2 | 78 | 50 | 64 | 1 | 13.39 | 1 |
24 | Pailin | 2 | 2 | 53 | 19 | 36 | 1 | 5.50 | - |
25 | Thboung Khmum | 7 | 7 | 93 | 47 | 51 | 4 | 9.50 | 2 |
Total | 204 | 175 | 7963 | 5749 | 72 | 164 | 701.09 | 54 |
Year | Junkshop (number) a | Recyclable Waste (ton) a | Revenue Recovered (USD) b | |||||
---|---|---|---|---|---|---|---|---|
Paper and Cardboard | Plastic | Aluminum | Iron | Glass | Total | |||
2010 | 259 | 26,522 | 23,583 | 8449 | 63,077 | 1367 | 122,997 | 25,578,460 |
2011 | 313 | 25,340 | 21,689 | 7297 | 68,336 | 14,469 | 137,130 | 25,415,510 |
2012 | 421 | 14,856 | 13,960 | 9866 | 30,013 | 9083 | 77,777 | 19,556,430 |
2013 | 450 | 18,004 | 12,820 | 10,113 | 19,955 | 13,652 | 74,544 | 18,559,020 |
2014 | 483 | 22,838 | 15,842 | 15,942 | 29,930 | 14,311 | 98,863 | 27,426,040 |
2015 | 439 | 14,769 | 12,678 | 100,050 | 17,184 | 9028 | 153,709 | 114,686,375 |
2016 | 445 | 33,857 | 30,907 | 87,741 | 74,328 | 20,134 | 246,967 | 115,820,995 |
2017 | 462 | 63,719 | 28,871 | 89,430 | 105,770 | 16,256 | 304,046 | 124,993,065 |
2018 | 462 | 36,829 | 23,886 | 26,664 | 45,723 | 7269 | 140,371 | 43,796,765 |
2019 | 498 | 38,180 | 27,208 | 27,973 | 46,282 | 7532 | 147,175 | 45,972,940 |
2020 | NA | NA | NA | NA | NA | NA | NA | - |
2021 | 692 | 67,701 | 36,389 | 31,120 | 64,348 | 2170 | 201,728 | 56,267,615 |
Parameters | USA | Japan | China | India | Cambodia | Indonesia | Thailand | Vietnam |
---|---|---|---|---|---|---|---|---|
Population (million) | 331.5 | 125.8 | 1410.0 | 1380.0 | 16.7 | 254.5 | 70.1 | 97.3 |
MSW generation (million ton) | 262.0 | 42.7 | 428.1 | 52.0 | 4.8 | 64 | 27.1 | 27.8 |
MSW generation rate (kg/capita/day) | 2.03 | 0.93 | 0.73 | 0.85 | 0.78 | 0.70 | 1.14 | 0.80 |
MSW management role | States | Local government | Local government | Local government | Local authorities | Local authorities | ULBs | DONRE |
MSW service provider | Local government and private | Local government and private | Local authorities | ULBs | Private | ULBs and private | LAOs | URENCO |
Source segregation rule | Yes | Yes | Yes | Yes | No | Yes | Yes | Yes |
MSW collection model | Door to door | Collection point | Community bins | Door to door | Door to door | TPS | Curbside | Door to door |
MSW collection rate (%) | 100 | 100 | 98 | 70 | 56 | 45–50 | 80 | 85 |
Landfilling (%) | 53 | 1 | 61 | 75 | 44 | 66.4 | 29 | 63 |
Recycling (%) | 26 | 19 | 4.4 | 10–20 | 4 | 5 | 21 | 10 |
Composting (%) | 8.9 | - | 3 | - | 2 | 7 | 2 | - |
Incineration (%) | 13 | 80 | 35 | 14 | 4 | 2 | 3 | 14 |
WTE plants (number) | 86 | 358 | 69 | 11 | 0 | - | 1 | 10 |
Incentive policy | Yes | Yes | Yes | Yes | No | Yes | No | Yes |
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Pheakdey, D.V.; Quan, N.V.; Khanh, T.D.; Xuan, T.D. Challenges and Priorities of Municipal Solid Waste Management in Cambodia. Int. J. Environ. Res. Public Health 2022, 19, 8458. https://doi.org/10.3390/ijerph19148458
Pheakdey DV, Quan NV, Khanh TD, Xuan TD. Challenges and Priorities of Municipal Solid Waste Management in Cambodia. International Journal of Environmental Research and Public Health. 2022; 19(14):8458. https://doi.org/10.3390/ijerph19148458
Chicago/Turabian StylePheakdey, Dek Vimean, Nguyen Van Quan, Tran Dang Khanh, and Tran Dang Xuan. 2022. "Challenges and Priorities of Municipal Solid Waste Management in Cambodia" International Journal of Environmental Research and Public Health 19, no. 14: 8458. https://doi.org/10.3390/ijerph19148458
APA StylePheakdey, D. V., Quan, N. V., Khanh, T. D., & Xuan, T. D. (2022). Challenges and Priorities of Municipal Solid Waste Management in Cambodia. International Journal of Environmental Research and Public Health, 19(14), 8458. https://doi.org/10.3390/ijerph19148458