Eco-friendly Waste Management Research Articles

Valorization of Grape Pomace: A Review of Phenolic Composition, Bioactivity, and Therapeutic Potential.

Vitis vinifera L., commonly known as grapes, is one of the most widely cultivated crops worldwide, with over 80% used for wine production. However, the winemaking process generates substantial residues, including grape pomace (GP), wine lees, and wastewater, which can pose significant environmental and economic challenges. Among these, GP stands out not only as a waste product but also as a rich source of polyphenols-bioactive compounds with recognized antioxidant and anti-inflammatory properties. Recent advancements have expanded the application of GP-derived extracts, particularly in the health and food industries, due to their potent bioactive properties. This review provides a comprehensive overview of the valorization of GP, focusing on its phenolic composition and therapeutic potential. It evokes innovative, environmentally friendly extraction techniques and integrated methods for the chemical analysis of these valuable compounds. Additionally, the health benefits of GP polyphenols are explored, with recent experimental findings examining their metabolism and highlighting the key role of gut microbiota in these processes. These insights contribute to a deeper understanding of the biological activity of GP extracts and underscore their growing significance as a high-added-value product. By illustrating how winemaking by-products can be transformed into natural therapeutic agents, this review emphasizes the importance of sustainable development and eco-friendly waste management practices, significantly contributing to the advancement of a circular economy.

Effects of process parameters on biogas production from food waste using aspen plus simulator

This study explores the potential of converting food waste (FW) in South Africa to biogas via anaerobic digestion (AD) using the Aspen Plus Simulator version 11. The simulation modeled the AD process, focusing on hydrolysis, acidogenesis, acetogenesis, and methanogenesis stages, with unconverted substrate recycling at the acetogenesis stage, employing a Non-Random Two-Liquid (NRTL) model for the polar mixture components. The FW used contained 49.86 % volatile solids (VS) of carbohydrates, 39.31 % VS of proteins, and 10.83 % VS of lipids. The results revealed that biogas yield at mesophilic temperature (37 °C) was 50 % higher than at thermophilic temperature (55 °C) with a residence time of 35 days, and methane composition was 45.98 % higher. Methane and carbon dioxide percentage compositions increased with hydraulic retention time (HRT), varying between 37.5–45.5 % and 34.3–39.9 % at mesophilic conditions. Economic analysis indicated a profitable outlook, with a payout period of 3 years, 5 months, and a 15-year positive revenue forecast. The project exhibited an internal rate of return (IRR) of 59.6629 %, suggesting strong economic viability and potential for investment. This study underscores the potential for optimized AD processes to enhance biogas production from FW in South Africa, presenting a viable, eco-friendly waste management solution.

Biodecolorization and Biodegradation of Sulfur Black by the Strain Aspergillus sp. DS-28

The textile industry significantly contributes to environmental pollution through its use of synthetic dyes, especially sulfur black, known for its toxicity and resistance to degradation. This research focuses on a fungal strain, Aspergillus sp. strain DS-28, isolated from activated sludge, which exhibits an exceptional ability to biodegrade sulfur black dye. This study systematically assessed the biodegradation capacity of this strain through a series of experiments conducted over a 7-day period. Analytical techniques including high-performance liquid chromatography time-of-flight mass spectrometry (HPLC-TOF/MS), scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR) were employed to monitor the degradation process. SEM showed a significant reduction in particle size, with surfaces becoming smoother and flatter post treatment. XRD indicated a decrease in the intensity of several chemical bonds, and FTIR analysis demonstrated the enhanced vibrational absorption peaks of benzene ring bonds, with the disappearance of -C-S- and -C-S-S-C- groups. The results demonstrate that Aspergillus sp. DS-28 degrades sulfur black by initiating the oxidative breakdown of its complex structures into simpler forms. This study not only elucidates the biodegradation pathway facilitated by Aspergillus sp. DS-28, but also highlights its potential application in developing eco-friendly waste management strategies for treating dye-contaminated wastewater.

Waste solution of acrylic-based emulsion with low solid content for cement concrete curing: a lab-scale study

In this study, we investigate using acrylic and acrylic-styrene emulsions as curing solution to enhance water resistance and prevent cracking in cement concrete surfaces. Our main objective is to investigate the possibilities of utilizing washing waste generated during the Rhomn & Haas factory - Dow Chemical Vietnam production process. This waste is currently being treated as solid even though it contains anywhere from 10-45% solid content. Through laboratory-scale experiments and analysis, we aim to assess the feasibility of employing this waste material as a cost-effective, technically sound, and environmentally sustainable solution for curing compound of concrete. The findings of this research have the potential to contribute to the advancement of eco-friendly waste management techniques while improving the durability and effectiveness of cement structures.

Sugar beet (Beta vulgaris L.) leaves as natural colorant for cotton dyeing using an ecofriendly approach toward industrial progress.

In the industrial sector, vegetable residual materials have received attention in the production of bio-colorant for textile dyeing. The current research endeavor is centered on investigating the possibility of using sugar beet leaves as a natural source of dye for the purpose of dyeing cotton fabrics. Different extraction methods were utilized to isolate the bio-colorant present in sugar beet residual material, and the most favorable colorant yield was obtained using a 5% methanolic KOH solution. For optimal dyeing results, the cotton fabric performed dyeing for a duration of 45 min at a temperature of 60 °C, using a salt solution concentration of 6 g/100 mL and 50 mL of the extracted dye solution. Characterization of dye using Fourier transform infrared spectroscopy analysis confirmed the presence of quercetin in the leaf extract. For the creation of a range of color variations, mordants that were chemical in nature, such as tannic acid, iron sulfate, potassium dichromate, and copper sulfate, as well as mordants that were bio-based, such as onion peel, pomegranate peel, henna, golden shower bark, and turmeric, were employed in harmony. In comparison, the utilization of bio-mordants resulted in darker shades that exhibited enhanced color intensity and superior color fastness properties with the value of 4-5 for wash, 4 for wet rubbing, 4-5 for dry rubbing, and 4-5 for light. The findings of this study hold significant value in terms of ecofriendly waste management and contribute to advancements in the industrial sector by utilizing waste residual materials as a natural source of colorants.

Evaluation of the addition of cement ash to the PVA/TEOS/HCl gel electrolyte on the performance of aluminium air batteries

Cement manufacturing presents substantial environmental challenges due to the volume of waste generated, including cement ash. Therefore, it is crucial to discover novel methods to utilize cement waste effectively. This study aimed to examine the impact of different concentrations of cement ash (1, 1.5, 2, and 2.5 g) on the conductivity of PVA/TEOS/HCl (PTH) gel electrolyte materials. The primary goal was to determine the ideal concentration of cement ash that would yield maximum conductivity. The research findings demonstrated that the PTH2.5CA sample attained the greatest conductivity of 2.78 mS/cm when adding 2.5 g of cement ash. In addition, this material exhibits a capacity of 0.354 mAh, a specific capacity of 0.12826 mAh/g, and a density capacity of 0.11813 mAh/cm2. The power and power densities were measured as 6.48 mW/cm2 and 25.94 mW, respectively. These findings offer promising prospects for implementing sustainable practices in the industry and highlight the viability of utilizing cement waste as a significant element in battery membrane materials. This technique addresses environmental issues related to cement waste and contributes to advancing a more eco-friendly waste management system.

The Effect of Education on Waste Management Activities 3R Method (Reduce, Reuse, Recycle) in RW 016 Pagambiran Ampalu Nan XX Village, Lubuk Begalung District, Padang City in 2023

The Padang City Environment Agency reports that, on average, the city produced 643.76 tons of trash per day in 2021–2022. In an interview with the head of RW 016, it was revealed that the community's garbage disposal to the TPS was due to a lack of suitable land. The purpose of this study is to determine how education influences 3R waste management initiatives in RW 016 Pagambiran Ampalu Nan XX Village, Lubuk Begalung District, Padang City in 2023. This type of research employs a quantitative approach, namely utilizing pretests and posttests to evaluate knowledge variables. The paired sample t-test methodology is employed in a descriptive study design. In the research sample, there were forty housewives. Field observations and questionnaire distribution were used to collect data. Following the computerization and processing of the data, a frequency distribution table was used to illustrate the examination findings. The study findings on the application of the 3R method in waste management education in RW 016 Pagambiran Ampalu Nan XX Village, Lubuk Begalung District, Padang City in 2023, as determined by statistical tests, show a statistically significant difference in waste management and knowledge between the pre- and post-education periods. The mean was 29.10 prior to schooling and 36.23 following education. A p-value of 0.000 exceeded the alpha value (α). Urban village agencies are expected to be mandated to create the necessary infrastructure to facilitate effective waste management, such as segregated landfills, recycling facilities, and eco-friendly waste management systems.

Hydrogen from food waste: Energy potential, economic feasibility, and environmental impact for sustainable valorization

Globally, inefficient management of municipal solid waste, composed primarily of food waste poses concern for human and environmental well-being. Food waste can be converted into hydrogen gas, which can be utilized to generate power without emitting any harmful pollutants. This solution would also help with the issue of disposing of food waste. The conversion of food waste into hydrogen is a practical energy source with potential financial benefits. This study explores the transformative potential of converting food waste into renewable energy through hydrogen production, focusing on Bangladesh from 2023 to 2042. Notably, the study forecasts a surge in food waste from 23 million tons in 2023–110 million tons by 2042. By 2042, food waste is expected to generate 2480 MW of power, a rise from 489 MW in 2023. Based on the results of the economic study, the food waste into hydrogen via gasification project is financially viable in all of Bangladesh's main cities. Metrics such as internal rate of return, payback period, levelized cost of energy, net present value, and total life cycle cost were used to assess economic viability. The hydrogen production cost, payback period, and internal rate of return are 2.05 $/kg, 11 years and 14% respectively. It was discovered that using the available electricity from hydrogen gas may displace 1428 M liters of diesel fuel combustion. The quantity of diesel fuel saved can cut carbon dioxide emissions by 3.85 million tons. It was also found that using hydrogen as a source of energy generation has an attractive ecological efficiency of 99.98%. This research provides novel and pertinent data for investors contemplating gasification-based energy projects in Bangladesh. It pioneers a path toward eco-friendly waste management, reduced greenhouse gas emissions, and the adoption of sustainable energy solutions for the country.

Assessing microbial exoelectrogenicity for enhanced industrial waste water management and power generation

The quest for eco-friendly waste management and renewable sources of energy is rapidly increasing. Microbial fuel cell is promising form of renewable energy, which treat and convert organic matter in wastewater to electricity through the aid of microorganisms present in the wastewater. This study assessed for electrogenic microorganisms that generate power during wastewater treatment at a referenced pH of 8.5 and temperature of 37 0C. The exoelectrogenicity and identity of the microbial isolates were confirmed using microbial fuel cell (MFC) and molecular characterization, respectively. Two bacterial isolates: N4- Providencia species, N6- Proteus species, and three fungal isolates: S9- Clavispora lusitaniae, S10- Candida parapsilosis ,S14- Clavispora lusitaniae with accession numbers; KX548357.1, KX548358.1 and KX548359.1, KX548360.1, KX548361.1, respectively showed exoelectrogenic properties. Proteus species and Candida parapsilosis generated relative high-power densities of 1.59 and 1.55 W/m2, respectively. Significant difference (p < 0.05) in wastewater treatment was also observed. When compared with the control wastewater, S10 recorded about 38% of contaminant removal with the following parameters; biochemical oxygen demand (536.38mg/l), chemical oxygen demand (1974mg/l), total dissolved solid (640mg/l) and conductivity (512µS/cm). The findings showed that, not only bacteria, but fungi are good exoelectrogenic microorganisms for industrial wastewater treatment and power generation in MFC setup.

Microbial degradation of low-density polyethylene (LDPE) and polystyrene using Bacillus cereus (OR268710) isolated from plastic-polluted tropical coastal environment

The study focused on marine bacteria, specifically Bacillus cereus, sourced from heavily polluted coastal areas in Tamil Nadu, aiming to assess their efficacy in degrading low-density polyethylene (LDPE) and polystyrene over a 42-day period. When LDPE and polystyrene films were incubated with Bacillus cereus, they exhibited maximum weight losses of 4.13 ± 0.81 % and 14.13 ± 2.41 %, respectively. Notably, polystyrene exhibited a higher reduction rate (0.0036 day−1) and a shorter half-life (195.29 days). SEM images of the treated LDPE and polystyrene unveiled surface erosion with cracks. The energy dispersive X-ray (EDX) analysis revealed elevated carbon content and the presence of oxygen in the treated LDPE and polystyrene films. The ATR-FTIR spectra exhibited distinctive peaks corresponding to functional groups, with observable peak shifts in the treated films. Notable increases were detected in carbonyl, internal double bond, and vinyl indices across all treated groups. Additionally, both treated LDPE and polystyrene showed reduced crystallinity. This research sheds light on Bacillus cereus (OR268710) biodegradation capabilities, emphasizing its potential for eco-friendly waste management in coastal regions.

The Efficiency of Black Soldier Fly Larvae with Vegetable, Fruit and Food Waste as Biological Tool for Sustainable Management of Organic Waste

This study investigated the sustainable management of wet organic waste using Black Soldier Fly Larvae (BSFL) for an innovative biological approach to waste management. The organic wet wastes such as fruit, vegetable, and food wastes were processed and fed to BSFL larvae from day 5 and the bioconversion process was carried out at Black Soldier Fly Unit, Tamil Nadu Agricultural University for 21 days. Among the three wastes, the highest bioconversion efficiency was recorded in fruit waste with 67% Substrate Reduction, 10.8% Efficiency of Conversion of Digested feed, 5.7% Bio Conversion Rate, and 4.18 Waste Reduction Index after 21 days. Whereas vegetable and food waste achieved similar bioconversion efficiency. The results suggest that BSFL-based bioconversion can be an effective and eco-friendly waste management and resource recovery technique to significantly lower the volumes of organic wet waste while converting it into high-value biomass and leading to a circular economy model.

Integrated biorefinery approach for bioconversion of fish manure to volatile fatty acids and its valorization by Schizochytrium sp for docosahexaenoic acid, squalene, and carotenoids production

To meet environmental sustainable goals, an integrated approach was used to generate volatile fatty acids (VFAs) from fish manure through acidogenic fermentation and their valorization by Schizochytrium limacinum SR21 for value-added biomass production. Acidogenic fermentations were conducted at different pH values (5.0–9.0) and total solid (TS) contents (5 %, 8 %, and 12 %). The highest VFA yield from thermally pretreated fish manure was obtained at pH 9.0 and TS 12 %. In batch culture, 84.0 % of the acidogenic fermentation VFAs were utilized by Schizochytrium limacinum SR21. The highest significant biomass, total fatty acids (TFA), and docosahexaenoic acid (DHA) production were 19, 10.1, and 3.0 g/L, respectively, at C/N ratio of 90 in batch culture with yeast extract as a nitrogen source. Analysis of the effects of three nitrogen feeding strategies with simulated VFA in pH-auxostat fed-batch culture shows that DHA concentration of 15.3 g/L and TFA yield of 53.56 g/L were achieved with low nitrogen (10 g/L) feeding. Squalene and carotenoid contents were 85 mg/g and 0.43 mg/g of dry biomass in fed-batch culture. These findings shows that the production of bio-based volatile fatty acids (VFA) is a cost-effective eco-friendly waste management method and provides high-value-added biomass for biofuel and aquaculture feed production.

Towards Sustainable Solid Waste Management Systems: Empirical Evidence From Northern Malawi.

Solid waste management system in Mzuzu City is a growing concern due to its inefficiency and the resulting effect of accumulation of solid waste. In light of this environmental challenge, a study was conducted to assess the system's effectiveness. Through a mixed methods approach and random sampling, 400 respondents from 5 different areas of the city of Mzuzu were selected to provide comprehensive and unbiased responses. It was found that both the public and private sectors lack a complete commitment to sustainable waste management, citing reasons such as limited knowledge on recycling benefits, inadequate infrastructure and budgetary constraints. As a solution, the study proposes a government-led campaign to change attitudes towards waste production and promote recycling. Additionally, a Public-Private Partnership (PPP) should be utilised to develop policies and strategies that encourage private sector involvement in eco-friendly waste management. To further enhance recycling practices, support is needed in transitioning to circular economy waste management practices through regular education and training.

Eco-Friendly Waste Management: A Segregation and Composting System for Domestic Use

The proper disposal of home garbage has recently emerged as a pressing issue on a global scale. Also, the city government has been trying to get people to separate their dry and moist trash. But there is still a problem with trash management and a big domestic population that isn’t helping out. This paper details the process of creating a waste management system that separates organic kitchen trash into dry and moist categories. Both models are part of the proposed system: The first step is to design a bin that can separate dry and moist trash. Additionally, a composting facility is showcased for the purpose of transforming organic waste into compost. Twenty homes’ worth of garbage was fed into the suggested model, and the results show promise for trash segregation and composting.

Household solid waste management in a recently established municipality of Bangladesh: Prevailing practices, residents’ perceptions, attitude and awareness

Increasing population, economic activities, and the associated factors put a serious strain on municipal solid waste management in developing nations. We assessed the amount of solid waste generated and elucidated the existing management practices at household level in Mymensingh City Corporation, Bangladesh. We also investigated residents’ perceptions and attitudes on waste management and their awareness on waste-induced health and environmental problems. Data were gathered by a questionnaire survey of 352 households and two key informants’ interviews. The Kruskal-Wallis H and Pearson Chi-Squared tests were used for statistical analysis. Results show that a household generated about 0.62 kg of waste per day of which 99% was organic. Following the door-to-door approach, the city corporation collects unsegregated waste. More than 50% of the households reused fresh food waste as green fertilizer, and either reused or sold paper, metal, and plastic waste. Small, higher-income, and educated households generated higher amounts of organic waste than their counterparts. Respondents were satisfied with the existing door-to-door waste collection system, like to use of bioenergy and organic fertilizer, and were willing to pay for sustainable and eco-friendly waste management. More than 80% of respondents were aware of public health and environmental issues caused by waste mismanagement. The corporation has a plan to establish an energy and compost plant for which we suggest providing incentives for source segregation and designated bins to households. The city planners can take the findings of this study as useful baseline information for planning sustainable municipal solid waste management.

Unraveling the challenges of waste-to-energy transition in emerging economies: Implications for sustainability

The recent geopolitical events, such as the conflict between Russia and Ukraine, have strained the available resources worldwide. In emerging economies like Bangladesh, which is heavily reliant on imported gas, oil, and coal, this has created a severe energy crisis. In response to the energy crisis and to support eco-friendly waste management, converting waste into energy is being recognized as a promising solution. However, introducing waste-to-energy systems in developing economies faces many intricate challenges that require careful examination. This study, therefore, aims to explore and evaluate the challenges associated with adopting a waste to energy (WtE) conversion system in emerging economies like Bangladesh. The research methodology involves identifying challenges from an extensive review of existing literature and expert feedback and then combining Bayesian theory with Best Worst Method (BWM) to evaluate the challenges. Among the 21 challenges analyzed, the ‘need for well-developed planning and incentivized policymaking’, ‘ineffectiveness in waste segregation at the source’, and ‘high cost for installation, maintenance, and infrastructure development’ appear to be the most significant challenges with weight values 0.071, 0.067, and 0.066, respectively. The study can enhance managers' understanding of the challenges faced by this sector and thus facilitate informed decision-making. The outcomes of this study are expected to enrich the existing body of knowledge, promote the diffusion of WtE technology in emerging economies, reduce dependency on the international energy market, and achieve global sustainable development goals (SDGs) such as affordable and clean energy (SDG 7), sustainable cities and communities (SDG 11), and climate action (SDG 13).

Application of Tofu Waste Treatment Installation to Produce Land Remediation Culture in Punge Blang Cut Banda Aceh

Purpose: This research paper explores an integrated solution for managing tofu waste from the SOLO Tofu Factory. By combining anaerobic digestion technology with urban organic farming, the study aims to provide a sustainable waste management model that benefits the factory and the surrounding community.
 Method: The study utilized mixed methods, including qualitative interviews and quantitative on-site observations. Anaerobic digestion technology was employed for waste treatment, and its effluent was analyzed for its potential as a bio-fertilizer. A sustainable urban organic farming system was developed, utilizing treated waste for cultivation. Data analysis involved qualitative thematic and quantitative measurement analysis.
 Practical Applications: The integrated approach offers helpful solutions. It provides the factory with an eco-friendly waste management solution, reducing pollution. The urban organic farming system promotes sustainable agriculture and remediates land, making it cultivable. This model serves as a blueprint for similar industries, fostering community development and environmental awareness.
 Conclusion: The research demonstrates the effectiveness of integrating anaerobic digestion and urban organic farming for tofu waste management. This approach offers practical, scalable solutions, reducing pollution, promoting sustainable agriculture, and fostering community development.

Investigation of thermal behaviour and synergistic effect in co-pyrolysis of municipal solid waste and sewage sludge through thermogravimetric analysis

Municipal solid waste (MSW) and sewage sludge (SS) co-pyrolysis have the potential to revolutionize waste management and address energy challenges. Consequently, it is crucial to explore the thermal and synergistic effect of MSW, SS and their blends using thermogravimetric analysis. Different blending ratios (MSW90%SS10 %, MSW80%SS20 % and MSW65%SS35 %) were analyzed under an inert nitrogen (N2) gas atmosphere, at various heating rates (10,20 and 30 K min−1), from 30 °C to 900 °C. This paper specifically addressed the effect of heating rate and blending ratio on separate and jointed pyrolysis of the two raw materials. The analysis revealed two significant decomposition stages observed in the individual pyrolytic processes and their blends. Results showed that a higher heating rate slowed down the decomposition rate due to less effective heat transfer. The blending ratio of 35 % SS at 20 K min−1 exhibited a positive synergistic effect while an antagonistic effect was observed in another mixing ratio. Activation energy determined using the Coats-Redfern model in the second stage of active pyrolysis for MSW90%SS10 %, MSW80%SS20 % and MSW65%SS35 % was 41.879, 43.365 and 40.271 kJ mol−1 respectively. The negative ΔS (entropy) and positive ΔH (enthalpy) values indicated a decrease in disorder and an endothermic reaction respectively. This finding was consistent with the formation of complex products from the feedstock and the endothermic nature of the pyrolysis process. Therefore, strategic co-pyrolysis optimization of MSW and SS with the precise blending ratio of 35 % sewage sludge and controlled heating rate of 20 K min−1, exhibits substantial potential for advancing eco-friendly waste management practices while enabling effective energy recuperation.

Computational insights into deep eutectic solvent design: Modeling interactions and thermodynamic feasibility using choline chloride & glycerol

To address climate change and environmental concerns, the chemical process industries are increasingly adopting green technology and exploring eco-friendly waste management practices. Deep Eutectic Solvents (DES) have emerged as promising green solvents with diverse applications in the industries in separation processes, catalysis, drug design, and a lot more. However, the ideal way for modeling ionic interactions within the hydrogen-bond acceptor (HBA) during DES synthesis remains uncertain, and theoretical insight on the formation mechanism of energetically stable DESs from choline chloride (CHL) and urea (URE) is yet to be explored. In this study, we investigate different modeling approaches (no bond, generic bond, or single bond) for ionic interactions in hydrogen-bond acceptor (HBA) molecules during DES synthesis and the thermodynamic feasibility of forming an energetically stable DES using choline chloride (CHL) and urea (URE) through theoretical calculations (PM3, HF, and DFT). Our findings indicate that the choice of modeling approach does not significantly affect the outcomes across calculation levels. The H-X DES formation pathway emerges as the most viable route for CHL: GLC DES synthesis, offering strong binding energy and high exothermicity. This pathway provides a robust solution for synthesizing energetically stable DES with potential applications in various industries. Researchers can consider alternative calculation levels when DFT becomes cost-prohibitive to optimize computational costs. Our study contributes valuable insights into DES design and synthesis, promoting environmentally sustainable and cost-effective processes.

Sustainable Waste Management in Malaysia: Leveraging Supply Chain Solutions for a Greener Future

Sustainable waste management has become a critical global concern, and Malaysia is no exception. With the country's increasing urbanization and economic growth, waste generation has risen significantly, posing environmental and social challenges. This paper explores the concept of sustainable waste management in Malaysia and proposes leveraging supply chain solutions as a pathway towards a greener future. The study examines the current waste management practices, their limitations, and the potential environmental impacts. It highlights the need for integrated and innovative approaches encompassing the entire waste management supply chain, from collection to disposal. By adopting sustainable supply chain practices, such as waste segregation, recycling, and waste-to-energy conversion, Malaysia can achieve more efficient resource utilization, reduce greenhouse gas emissions, and minimize landfill usage. Furthermore, the paper addresses the role of government policies, private sector engagement, and public awareness in fostering a successful transition towards sustainable waste management. The findings and recommendations presented in this study contribute to the ongoing efforts to develop a comprehensive and eco-friendly waste management system in Malaysia and serve as a model for other developing nations facing similar challenges.