Status Of Waste Management Research Articles

Current status and trend of municipal solid waste management in the Mekong delta

Current status and trend of municipal solid waste management in the Mekong delta

Affordable and sustainable clean energy generation potentials from municipal dumpsites: case study of Oke saje dumpsite, Abeokuta, Ogun State, Nigeria

The operating method of final waste disposal in Oke saje area of Abeokuta is direct open dumping and burning. This study was conducted at a major dumpsite in Abeokuta, to investigate the existing waste management systems, characterize solid wastes generated, and estimate for the sustainable energy generation potentials. Exploratory study design was adopted for a period of six (6) months, May to November, 2023. Seven (7) randomly selected plots of 1sq.m were located on Oke saje dumpsite, from where solid wastes were collected from top to the depth of 300 mm. Waste components were weighed to obtain the weight-based characterizations. Sorting into major waste components was in accordance with College and University Recycling Council (CURC) grouping system with modifications to accommodate peculiar waste stream generated in Oke saje dumpsite. Waste samples were taken to laboratory to carry our necessary physical, chemical and proximate analyses. Estimated total solid waste generation in Oke- saje, dumpsite was 3,718,832.03 kg (3718.83 tonnes). Estimated energy content of solid wastes was 46370.47MJ. This implies that there is possibility of electricity generation up to 12.881MWh from daily steam production. An integrated solid waste management concept adoptable to Oke- saje, dumpsite, has zero waste concept of about 46 % waste material recyclable (from composting, bio-fuel production and recyclables), with electricity generating potential of 5.923 KWh and 56 % energy recovery (from electricity generation, incineration-derived ash and residual ash for landfilling or soil enhancement), of about 6.956 KWh. Considering the high material recyclability, reusability and energy recovery potentials from solid wastes generated from Oke saje dumpsite, it was recommended that the Ogun State Waste Management Authority adopts affordable, sustainable and integrated waste management options of waste minimization and sorting from the source, reuse, recycling, and incineration of solid waste generated from the large communities within the state.

Evaluation of Medical Waste Generated from Government Hospitals and Healthcare Centers in the City of Hodeidah, Yemen

In the present study, the current status of medical waste management in the city of Hodeidah was presented in terms of its definition, components, sources, and threats that may result from improper handling. This investi-gation aims to study the potential environmental and health impacts of existing medical waste produced by the government hospitals and healthcare entities in Hodeidah City, in addition to comparing the applied methods and procedures with the methods and procedures that are applied in developed countries. The research study was carried out from January 2022 until January 2023, and targeted ten government hospitals and healthcare institutions in Hodeidah City. It relied on descriptive and analytical scientific methods, which aim to describe and analyze medical solid waste generated from the selected institutions. The result of the study showed that the total quantities of waste produced in all studied government health facilities amounted to approximately 599,038 kg/year. The percentage of non-hazardous waste was about 67% against hazardous waste which was 33%. Hospitals that receive more patients and have more beds as well as a multiplicity of their specialties generate larger medical wastes. The present research investigation revealed that government hospitals and healthcare centers in the city of Al-Hodeidah have low levels of health and safety conditions. They do not meet the local and international standards and requirements in the Medical Waste Management Guides and Recommendations. The poor management situation of medical waste could expose Yemeni citizens to danger. The healthcare insti-tutions should be supervised and controlled and ensure management of medical waste following environmental regulations and laws.

Investigating the Operational Feasibility of Waste Management at Integrated Waste Management Sites in Balikpapan City

Referring to the Balikpapan City Medium-Term Development Plan for 2021-2026, the percentage of waste transported to the Final Waste Processing Site (FWPS) is 75.45%, which is higher than the percentage of waste management. As of now, there are 2 Integrated Waste Management Sites (IWMS) in Balikpapan, namely MRF and ITF. Based on data from 2019, waste management at MRF decreased by 51.14%. Meanwhile, ITF only utilizes 25.98% - 31.31% of total incoming waste, with the remainder being sent to Manggar FWPS. This decline in performance is also related to the deteriorating condition of approximately 62% of waste management infrastructure in Balikpapan, so evaluation of the operational aspects of waste management becomes a crucial factor in addressing this issue. In addition, the ideal condition of waste management according to standards serves as the main indicator in assessing the performance of waste management. This research aims to evaluate operational aspects of waste management at Balikpapan IWMS by applicable regulations. Analysis methods used are mass balance analysis and operational performance analysis. Research findings show that waste management at IWMS Balikpapan City can reduce the volume of waste in Balikpapan City. However, the operational performance of MRF did not meet established standards, especially in terms of waste removal and processing systems, with a score of 19. On the other hand, ITF is considered sufficient by provisions of PUPR Minister Regulation Number 03 of 2013 and Indonesian National Standard 19-2454-2002 with a score of 23.

Integrated Environmental Management: Achieving Sustainable Development through the Lens of Water, Air and Waste

This paper explores the global status, primary issues, challenges, and implications of water, air, and waste management for sustainable development. Water management is crucial to achieving sustainable development goals. Currently, half of the global population faces severe water shortages annually, and a quarter faces "extremely high" water stress. Air management is closely tied to energy consumption, urbanization, and industrialization, with air pollution causing millions of premature deaths each year, especially in low- and middle-income countries. Waste management faces challenges from plastic pollution, electronic waste, and food waste, urgently requiring global improvements in infrastructure and regulations. The paper emphasizes the importance of an integrated approach to water, air, and waste management, as they are interconnected and impact the environment, health, and the economy. It calls for policy innovation, technological advancements, and societal behavior change, and emphasizes global cooperation and local action to achieve sustainable development goals.

Research on households’ willingness to pay for the options of price calculation of household solid waste management services in Hanoi

This study used the contingent valuation method (CVM) to investigate and analyse the current status of household solid waste management and evaluate people’s consensus and willingness to pay (WTP) for household solid waste collection, transportation, and treatment services among urban, rural, and mountainous areas in Hanoi. It also utilised regression analysis to assess factors affecting people’s WTP. The study surveyed a sample size of 405 households. To ensure a basis for comparison among urban, rural, and mountainous areas, the study distributed and conducted an equal number of 135 surveys in each area through random sampling. The research results indicate that the average household solid waste in Hanoi is highest in urban areas at 1.27 kg/household/day, followed by rural areas at 1.21 kg/household/day, and mountainous areas at 1.067 kg/household/day. However, most household solid waste has not been classified at the source. Regarding WTP for household solid waste collection, transportation, and treatment services, the results show that 85% of urban households agreed to pay higher than the proposed price, with an average WTP of 1,136 VND/kg. In rural households, 47% agreed to pay 778.96 VND/kg, and 11% of mountainous households agreed to pay an average of 673.04 VND/kg. These insights can guide tailored waste management pricing strategies across diverse urban and rural settings.

Evaluation of Municipal Solid Waste Management in Brazilian Cities According to the Updated Waste Management Condition Index –ICGRA

Evaluation of Municipal Solid Waste Management in Brazilian Cities According to the Updated Waste Management Condition Index –ICGRA

Integrated Environmental Management: Achieving Sustainable Development through the Lens of Water, Air and Waste

This paper explores the global status, primary issues, challenges, and implications of water, air, and waste management for sustainable development. Water management is crucial to achieving sustainable development goals. Currently, half of the global population faces severe water shortages annually, and a quarter faces "extremely high" water stress. Air management is closely tied to energy consumption, urbanization, and industrialization, with air pollution causing millions of premature deaths each year, especially in low- and middle-income countries. Waste management faces challenges from plastic pollution, electronic waste, and food waste, urgently requiring global improvements in infrastructure and regulations. The paper emphasizes the importance of an integrated approach to water, air, and waste management, as they are interconnected and impact the environment, health, and the economy. It calls for policy innovation, technological advancements, and societal behavior change, and emphasizes global cooperation and local action to achieve sustainable development goals.

A novel solid waste instance creation for an optimized capacitated vehicle routing model using discrete smell agent optimization algorithm

This paper presents an optimal vehicle routing model for an efficient waste collection process using the Ogun State Waste Management Agency (OGWAMA) as a case study. Just like in many cases, the current manual predetermined routing method used by OGWAMA is inefficient and contributes to excessive fuel usage. These challenges, in addition to the small instances reported in most literature, inspire this research to propose an improved routing scheme that takes into account real-time costs and eventually develops a novel instance based on OGWAMA's operation mode. The developed model was optimized using a new discrete smell agent optimization (SAO) algorithm and compared to firefly algorithm (FA) and particle swarm optimization (PSO). The SAO outperformed FA and PSO, achieving 3.92 % and 19.38 % improvements in service cost (SC) and 2.65 % and 14.96 % improvements in total travel distance (TTD), respectively. The convergence rates of the algorithms were also compared; using the Optimized Depot (OD) techniques and results shows the acceptability of the proposed approaches.

NATURE AND EFFECT OF WASTE GENERATED IN NASARAWA STATE, NIGERIA

The problem of indiscriminate waste disposal dates back to the earliest urban settlements in human society. The trend has been on the increase across many societies including Nigeria. This paper examined the nature and effect of waste generated in Nasarawa State, Nigeria. The study adopted the Reasoned Action Theory to explain the nature of waste generated in the study area. A cross-sectional survey design was adopted for the study. A sample of400 respondents was drawn through simple random, systematic sampling, clustered and purposive sampling techniques in the selection of Local Government Areas, electoral wards, towns/villages, main streets, houses, households and individuals. Primary data were generated through the use of questionnaire and in-depth interview. The questionnaire copies were analysed quantitatively using simple percentage while test frequency tables, mean and in-depth interview were unbundled using content analysis. The findings revealed that decomposed food items, empty sachet water packs and water bottles, empty engine oil gallons, used and unused drinking straw, sachets of all kinds, biscuit, condemned zincs and building materials were the solid wastes indiscriminately disposed in the study area. The study recommends that the Nasarawa State Waste Management Board should intensify the collection of solid wastes from the doorsteps of residents for appropriate recycling to mitigate the associated health and environmental hazards associated with the indiscriminate disposal of solid waste in the study area.

Spatial analysis of leachate penetration at Lemna dumpsite, Calabar: Implications for sustainable waste management in Cross River State

This study rigorously investigated the spatial analysis of leachate penetration at Lemna dumpsite, located in Calabar, Cross River State, Nigeria. Purposeful soil sampling, performed at specific intervals (5 m, 25 m, and 50 m) along the Electrical Resistivity profile line within the dumpsite, was augmented by water sample collection from five boreholes near Lemna dumpsite. Utilizing Electrical Resistivity Tomography (ERT) and Vertical Electric Sounding (VES) survey techniques, resistivity data were systematically gathered to comprehensively analyze the Leachate Penetration in the Lemna dumpsite. Laboratory analysis of soil and borehole water quality focused on Benzene, Toluene, Ethylbenzene, and Xylene (BTEX), with paired sample t-tests applied for statistical scrutiny. Analyzing the ERT and VES data employed sophisticated techniques embedded in Resistivity Two Dimension Invasion software and Advanced Geosciences Incorporation Earth Imager software. Substantial disparities (p < 0.05) emerged in the paired sample t-tests for BTEX in soil compared to National Environmental Standard Regulation and Enforcement Agency (NESREA) limits. Similarly, BTEX in borehole water displayed significant differences (p < 0.05) when compared to World Health Organization (WHO) standards, raising alarming concerns about the safety and portability of groundwater in the area. The examination of dumpsite leachate penetration revealed a resistivity anomaly of 8.01 Ωm and an inverse depth of 12.4 m, underscoring profound environmental implications and necessitating immediate remediation efforts. Additionally, Vulnerability and Aquifer Protective Capacity Index (VES) results, with a rating of <0.1, indicated severely compromised aquifer protective capacity, emphasizing the vulnerability of groundwater resources to further contamination. Our study advocates for strategic management, remediation, and monitoring measures to prevent contamination and safeguard water quality in the region.

Assessing the circularity status of waste management among manufacturing, waste management, and recycling companies in Kigali, Rwanda

A high quantity of waste is generated from industrial activities by manufacturers across metropolitan cities compared to smaller cities with fewer industrial activities. Adopting Circular Economy principles in waste management has the potential for sustainable waste management to reduce the quantity of waste at dumpsites and harmful emissions from wastes. The study was conducted to assess circularity status and challenges for attaining higher circularity by Kigali’s manufacturing, waste collection, and waste recycling companies using the 10-R framework. The study also sought to build estimates for industrial solid waste quantity and methane emissions for the next 10 years (2020–2030) in Rwanda. A mixed method approach was utilized where primary data was collected from manufacturing, waste collection, and waste recycling companies using a validated questionnaire and an in-depth interview guide. Thematic, descriptive analysis and First Order Decay methods were used to analyze the qualitative, quantitative, and secondary data. Results show that adopting the 10-R principles of circular economy was low and varies across manufacturing, waste collection and recycling companies. There were instances of high adoption of R3-Reuse and R8-Recycle with a mean score of 7.17 and 7.21 among manufacturing companies. R7-Repurpose (8.80) recorded a high adoption rate among waste collection companies and a medium level of adoption for R7-Repurpose (3.50) and R9-Recover (3.00) among recycling companies. The overall low adoption toward attaining circularity was attributed to various economic, institutional, infrastructural, operational, attitudinal, and technological challenges. In 2030, it is projected that 922 Gg of industrial waste will be deposited in solid waste disposal sites in Rwanda; with an estimated methane emission of 157 Gg Carbon dioxide equivalence. It was recommended among others, that human resource capacity development should be prioritized to drive the adoption of the 10-R principles across manufacturing, waste collection, and waste recycling companies in Kigali, which can reduce the quantity of wastes that ends at dumpsites and methane emissions that contribute significantly to global warming.

Construction Waste Management from Environmental Law Perspective in Indonesia

Several prior studies have linked the relationship between construction activities and environmental degradation. This research focuses on one of the major issues confronting the Indonesian construction industry, namely construction waste management. In practice, construction waste cannot be avoided and thus must be managed properly. Using a descriptive normative legal study approach and a case approach, this research seeks to investigate the practices and conditions of construction waste management as well as the regulatory legal framework related to construction waste management in Indonesia. This study found that the practice of implementing construction waste management varies greatly depending on the understanding and skills of construction business actors, especially contractors and subcontractors. In addition, normative studies show that there is no regulation that specifically regulates the management of construction waste in Indonesia. Therefore, this research contributes by: (1) encouraging the government to make policies that specifically regulate construction waste management, (2) encouraging periodic monitoring and supervision efforts on the implementation of construction waste management, and (3) encouraging the active participation of the community to participate in supervising the execution of construction projects, especially regarding the management of construction waste. Therefore, this study emphasizes the importance of a legal framework for construction waste management in order to realize sustainable construction.

Public Opinion Survey on the Status of Waste Management in Sri Lanka

Solid waste and wastewater management is a critical issue in Sri Lanka. Self-administered 18 questions were used for primary data collection covering 1,158 responses within 25 districts randomly. Age groups of the respondents and their contribution (as a percentage) for the survey were; below 18yrs (3.01%), 18-30yrs (90.59%), 30-45yrs (3.17%) and above 45yrs (1.90%). Among the respondents; 75.09% were undergraduates, 8.89% were employed, 6.13% were school students and, 5.76 were in other institutes of higher education. The time period of the survey was from 20th July 2021 to 6th August 2021. Survey was carried out using online platform (google forms). Questioner was developed to acquire information related to; solid waste, water quality (using taste as a parameter), waste disposal, disposal methods, type of wastes collected, were obtained. This was not merely a household survey, but included waste management done by Municipal councils as well. The objectives of this survey were; to find the quality of water in each area of Sri Lanka, to get an idea about household wastes and the availability of methodical waste disposal facilities, and to obtain ideas from the respondents. According to the data obtained from the survey, 83.77% of the respondents claimed that the consumed water doesn‘t contain hardness. Also, 56.30% respondents reuse household wastewater while 54.58% respondents dispose of less than 1kg of waste daily. Open dumping areas don't exist for 78.93% of the respondents, 56.39% of the respondents were aware of land-filling but 8.98 % thought that landfill process was not a good solution for garbage disposal. The disposal of non-degradable wastes to the environment was 50.07%. Burnt and open dumping percentages of household wastes were 34.54% and 10.47% respectively. Waste collection by the municipal councils does not happen systematically according to 55.01% respondents. Garbage recycling centers do not exist for 69.34% respondents. The survey showed that knowledge of waste disposal methods and environmental impacts must be improved. Awareness programs have to be conducted to acknowledge the community. Solutions from the respondents included establishing more sanitary land-filling facilities in necessary areas. Encouraging recycling of waste among the communities by conducting awareness programs about recycling companies that buy separated wastes like plastics, papers, glasses etc. which would provide an additional income. &#x0D; Keywords: Solid waste, Wastewater, Disposal, Land-filling, Garbage

Investigating waste disposal methods and public perceptions of government-supervised contractors in selected Port Harcourt residential communities

This research investigates waste disposal methods and the public's perceptions of government-supervised contractors in selected residential communities within Port Harcourt, Nigeria. The study focuses on the Public Private Partnership (PPP) approach implemented by the Rivers State Government through the establishment of the Rivers State Waste Management Agency (RIWAMA). It explores various dimensions of waste management, encompassing practices of refuse disposal, public attitudes, waste segregation, household waste disposal behaviours, community satisfaction levels, and community involvement. The study unveils a spectrum of refuse disposal methods utilized by households, emphasizing their regulatory and environmental implications. Public perceptions of the waste management system exhibit considerable diversity across different aspects, underscoring the necessity of addressing concerns and enhancing overall public satisfaction. Furthermore, the research highlights a lack of waste segregation practices among residents and service providers, stressing the importance of promoting waste segregation for recycling and environmental sustainability. Private waste handlers are predominantly relied upon by residents for household waste disposal, necessitating vigilant regulation and environmental considerations. In light of these findings, recommendations are put forth, including bolstered regulation, increased infrastructure investment, educational campaigns, advocacy for recycling, and enhancements in service quality. These recommendations aim to establish a more efficient and sustainable waste management system in Port Harcourt, aligning with global sustainability objectives and environmental preservation.

Status of Solid Waste Management in Kaduna and Bauchi of Nigeria

Status of Solid Waste Management in Kaduna and Bauchi of Nigeria

An assessment of municipal solid waste management system in Oshogbo, Osun State Nigeria: Challenges and prospects

The study empirically assessed the challenges and prospects of municipal solid waste management system in Oshogbo, Osun State, Nigeria. The study specifically looked into the current - status, the performance of municipal solid waste social control system of the city, and the households solid waste social control practice. Primary data were used and sourced through a well-design survey questionnaire, field observation, reviewing published and unpublished documents, and on spot access. Descriptive statistics was used for the data analysis. The main factors aggravating the present poor state of municipal solid waste social control of Oshogbo were revealed in the study. The results further showed that Osun state waste management agency is not leaving up to its responsibility and delay in collection of wastes, the activity of municipal solid waste social control of the town is majorly executed by micro and macro scale enterprises with very limited contribution of the agency saddled with such responsibilities. Besides this, there is no involvement of non- governmental organization and private sectors as the government of the day portrayed it. Inadequate solid waste social control pattern of the households. The first inadequacy of households is poor handling of short-lived storage material of various houses. That is, trash disposal around the waste container. Likewise, they are uncovering in the rain, light and heat, they do not take cognizance of sustainable solid social control actions for instance, reprocessing, reclaim and composting. Except, for the prohibited solid waste disposal. In addition, they are less motivated to clean their immediate environment. Thus, the study recommends that government waste management agency in conjunction with non-governmental organization should commence training on waste social control practices, with focus on women as agent of change in a community, while the institutions should leave up to their responsibilities.

Assessment of waste management practices and waste banks in urban areas of Indonesia: A case study of East Jakarta and Depok City

The rapid population growth in major cities in Indonesia, including East Jakarta and Depok City, has resulted in increased consumption patterns that have an impact on the quantity and quality of generated waste. These communities’ current waste management practices are inadequate, encompassing sorting, collection, and processing—evaluating existing waste management conditions involve sampling, observation, interviews, and questionnaires. In Pancoran Mas, the average waste generation was found to be 0.24 kg per person per day, with food waste comprising 51% and plastic waste 18%. Pulo Gebang exhibited similar results, with a waste generation rate of 0.22 kg per person per day, consisting of organic waste accounting for 46.7% and plastic waste at 19%. However, both districts have established Waste Banks, namely Hasvil (HWB) and Sekar Wangi (SWB) in Pancoran Mas and Pulo Gebang. The waste bank data revealed that HWB had a waste generation rate of 0.08 kg per person per day, while SWB had a rate of 0.12 kg per person per day, predominantly paper waste. HWB successfully reduced individual waste going to landfills by 33% for approximately 120 people, whereas SWB achieved a reduction of 52% for around 80 people.

Hazardous Waste Management in the Cement Industry for Alternative Raw Material (ARM) or Alternative Fuel (AF)

Hazardous waste from the cement industry can pollute the environment and human health. The use of cement industry waste can be done to minimize this impact. This study aims to analyze the initial conditions of hazardous waste management in the cement industry and its potential utilization. This research was conducted by field observation through three stages, namely the stages of preparation, implementation, and preparation of reports. The XYZ cement industry has two procurement schemes, polutter payment and purchase. The XYZ cement industry permits hazardous waste as an alternative raw material (ARM) for fly ash, bottom ash, paper sludge, drilling cutting, crude oil, contaminated soil, and bleaching earth/eco oil, EAF (electric arc), and dust furnaces. Meanwhile, alternative fuel (AF) consists of used bag cloth, majun (contimated textile waste), used oil, kluber, used grease, resin, and pure SBE (spent bleaching earth).

Spatial Pattern of Generation and Management of Household Hazardous Waste in Enugu Metropolis, Enugu, Nigeria

The paper examined the spatial pattern of Household Hazardous Waste (HHW) generation and management options in the Enugu Metropolis. Ten (10) layouts were randomly selected from forty one (41) residential layouts that make up Enugu Metropolis. A total of 300 structured questionnaires were randomly administered to households, while oral interviews were conducted in the Enugu State Waste Management Agency (ESWAMA). The study showed that home cleaning waste was the most frequently generated HHW, accounting for 19%. This was followed by glasses (17%) and batteries (14.8) while the less generated include e-waste (10.4%), motoring products (8.7%), and paints (7.1%). Government Residential Area (G.R.A) generated the highest amount of HHW with a percent value of 13.1%, followed by New Haven (12.7%), Iva-Valley (10.6%), Ogui (10.2%) and Independence layout (10%). The relationship between dwelling type and quantity of HHW generated showed that the buildings with multiple rooms generated the highest (31%) amount of HHW, followed by three bedroom apartments. Lowest income earners (5,000-20,000 naira) were known to generate highest quantity, while houses with income above 250,000 naira generate less quantity. The study showed that 22.7% of the households indicated that they have no means of disposing of HHW, 2.7% indicated that they keep them or reuse them, 2.6% pour liquid HHW down their sinks or drains, 5% take them to a landfill site, the remaining 67% dispose of them in anyhow. Thus, there is a need for sensitization as this will encourage waste sorting, as well as help in educating the public on the need to purchase fewer hazardous products.