Volume Of Waste Research Articles

Ancaman Keselamatan dan Kenyamanan Lingkungan Hidup di Sekitar Area Pembuangan Sampah

The increasing volume of waste is now a new problem that needs to be solved. This research aims to determine the threat of safety and environmental comfort around the waste disposal area, specifically at the Bantar Gebang Integrated Waste Management Site. The method used in this research is a literature study obtained from the results of literature studies sourced from journals, literature, publications, and other relevant sources. The results of this study can be a recommendation to prevent various threats to the safety and comfort of the environment around the Integrated Waste Management Site that have the potential to threaten the sustainability of the environment and the living conditions of the surrounding community.

Estimation of landfill gas emissions at the solid waste disposal site of low-population regions with LandGEM and tabasaran–rettenberger mathematical models

ABSTRACT In developing countries, solid waste most commonly ultimately ends up is landfill. Landfill sites release significant amounts of air pollutants, such as methane (CH4) and carbon dioxide. It is thus important to reduce, control, and recycle these gases. In this study, we aimed to calculate gas emissions and energy production from landfill sites serving low-population areas. Future landfill gas production was estimated using LandGEM and Tabasaran – Rettenberger models, based on population and waste volume predictions. In both models, total amount of landfill gas and CH4 produced reached their highest values in 2035. According to the LandGEM model, this will amount to 11,230 and 3,179 Mg/year, respectively, while the Tabasaran – Rettenberger model predicted 14,986 and 4,014 Mg/year, respectively. The volume of landfill gas calculated using the Tabasaran – Rettenberger model was 3.730 million m3/year for 2021, while this was 2.544 million m3/year using the LandGEM model. In 2021, 84007 Mg of waste was disposed of at the landfill site. According to data from the electricity generation plant at the site, the electrical energy generated in 2021 was 5,309 kWh. Comparing the results from these two models with actual landfill data, the Tabasaran – Rettenberger model came closest to the estimate. Therefore, the Tabasaran – Rettenberger model can be used to estimate the potential for gas production at landfill sites in cities with similar waste components.

Effect of temperature on the ability to synthesize SiC from rice husks

Abstract Agricultural production in Vietnam annually generates a substantial volume of by-products and waste, with rice husks constituting the predominant fraction. Due to their meager economic value, rice husks are typically deemed agricultural waste and are commonly disposed of through incineration or discharge into rivers, contributing significantly to environmental pollution. In this investigation, rice husks were employed as the principal raw material for synthesizing silicon carbide. A blend of rice husks and silica gel in a ratio of 1.4/1 was subjected to sintering in a CO2 environment within the temperature range of 800 – 1200 oC for 30 minutes. The chemical composition of the resultant product post-pyrolysis was ascertained in accordance with the ISO 21068-2:2008 standard. The capacity for SiC formation was further assessed utilizing Fourier transform infrared spectroscopy and X-ray diffraction. The outcomes revealed that the optimal temperature for SiC synthesis was 1200 oC. The composition of the sample post-pyrolysis was determined as 20.4% SiC, 51.2% SiO2, and 26.4% C (%wt.). The primary phase constituents encompass amorphous carbon, cristobalite, α-SiC, and β-SiC. Scanning Electron Microscopy/ Energy Dispersive X-ray imaging of the product at 1200 oC exhibited dispersed SiC crystals on a SiO2-C substrate. The presence of SiC suggests the potential application of the product as a wear-resistant material.

MITIGATION EFFORTS FOR QUICK DETECTION OF POLUTAN GAS AT PUTRI CEMPO TPA USING PROTOTYPE ZnOTiO2GO

The impact of the increasing volume of waste in the Putri Cempo TPA causes the emergence of pollutants in the form of liquid, gas or solid. Gas is a dangerous pollutant because it can cause respiratory disease and even death. methane gas (CH4), sulfurdioxide (SO2), ammonia (NH3), and hydrogen sulfide (H2S), so that it can be the cause of respiratory (respiratory)-related diseases cardiovascular, and physiological changes such as pulmonary function and blood pressure. This study tries to identify pollutant gases that arise in the Putri Cempo TPA and the detection method uses ZnO-TiO2-GO Material which previously used an adsorbent solution. The use of this material has the advantages of being practical, safer and easier to recycle. The gas identification carried out includes SO2, O3, NO2, H2S and NH3 gases. ZnO-TiO2 and GO materials were varied into variation A, B, C ,D And E. The results showed that The results show that the composition of TiO2; ZnO Graphene C (45%; 45%, 10%) shows better results for detecting NO2 gas than the p-aminodimethylaniline working solution used for laboratory measurements. The results show that the composition of TiO2; ZnO Graphene E (60%; 30%, 10%) shows the composition's ability to detect 10 times more H2S gas than the p-aminodimethylaniline working solution but the ability to detect NH3 is lower than the p-aminodimethylaniline working solution. composition variations in TiO2; ZnO ; Graphene B (30%; 60%, 10%), and D (80%; 15%, 5%) can detect exposure to SO2 and O3 gases 6 times more than p-aminodimethylaniline solution. From various compositions, it shows that TiO2, ZnO, Graphene materials are more dominant than aminodimethylaniline solution except for the detection of NH3 pollutant. The results of the research recommendations need to be developed prototypes for the detection of the five pollutant gases without having to go through laboratory testing. The development of a prototype of the pollutant gas detection tool can speed up the measurement of gas pollutants. So that it is easier for analysts to measure gas pollutants. It is necessary to develop the effect of the concentration of adsorbed pollutant gas on the composition of materials with various conductivity of material compositions for further research

Evaluating the Environmental Impacts of Pretreatment and Nanoparticles in Solid-State Anaerobic Digestion Using Life Cycle Assessment

AbstractThe yield of green energy from solid-state anaerobic co-digestion (SSAD) has recently been enhanced by incorporating innovative pretreatment methods and nanoparticles. However, the environmental consequences of employing new processes have not been fully examined. In this study, the environmental impacts of three high-methane-yielding scenarios including SSAD of corn stover blended with dairy manure (DM) denoted as (SYM1), calcium hydroxide-pretreated corn stover (CpCS) blended with DM (SYM2), and the CpCS blended with DM and nanoparticles (SYM3) were assessed and compared the baselines of solid-state and semi-solid-state anaerobic digestion using a life cycle assessment (LCA) approach. The approach investigated the best management practices that would result in high methane yield and low environmental impact. Results of the life cycle assessment indicate the inclusion of calcium hydroxide and nanoparticle has minimal negative environmental impact. There was an environmental gain in GWP when corn stover was co-digestion with DM (SYM1) relative to DM mono-digestions (baselines) and the carbon footprint of SYM1 was less by more than 85% compared to SYM2 and SYM3. However, the large volume of untreated corn stover harnessed for SYM1 scenario resulted in over 75% fossil fuel depletion compared to the other scenarios. The surplus methane from the SYM3 (at least twofold of other scenarios and baselines) in conjunction with being the least with the environmental implication makes the scenario the most attractive option for on-farm practice capable of harnessing the growing organic waste volume. These outcomes can guide trade-off between pretreatment and nanoparticle application to reduce solid-state anaerobic digestion’s negative environmental impact.

A laboratory study on the durability of limestone wastes in harsh environments for their suitability as aggregate in concrete

One of the critical environmental issues in the Chegeni area (Lorestan Province, western Iran) is the production of a large volume of limestone wastes during the quarrying operations. Releasing limestone wastes in the areas neighboring the quarries has caused visual damage to the environment, and adverse effects on the quality of the soil, running water, and groundwater used for agricultural and drinking water purposes. One solution to this issue can be recycling limestone wastes to produce building materials. In the present study, a comprehensive laboratory program is planned for the durability evaluation of the limestone wastes under harsh environments for their suitability as aggregate in concrete. For this purpose, five aging tests, including freeze-thawing (F-T), salt crystallization (SC), acid attack (AA), wetting-drying (WD), and heating-cooling (HC), were conducted on the limestone sample up to 60 cycles. After every 10 cycles, the physico-mechanical characteristics of the sample, including porosity (n), Brazilian tensile strength (BTS), point load index (PLI), and P-wave velocity (Vp) were determined. Moreover, the pores structure modification of the sample subjected to aging tests was examined through scanning electron microscopy (SEM). Data analyses revealed that the sample is highly vulnerable to the AA and SC processes but is durable against FT, WD, and HC actions. These results were in good agreement with the SEM data such that the sample exposed to AA and SC underwent more changes in their pore structure compared to FT, WD, and HC. Among the physico-mechanical characteristics, the Vp and PLI had the highest and the lowest accuracy, respectively, in the durability evaluation of the sample exposed to aging tests. Based on the data analysis, limestone wastes can be used as aggregate in concrete in environments with the possibility of FT, WD, and HC. However, this type of concrete is not suitable for conditions with occurrences of the AA and SC. Finally, in addition to reducing the environmentally harmful impacts of the study area, using limestone wastes as aggregate in the construction of concrete can also be a practical solution for sustainable development from an economic viewpoint. The results of the present study can be used for assessing limestone wastes produced in other areas of Iran and the world.

Rapid Composting Using a Novel Agricultural Waste Shredder

Agricultural waste causes social and environmental pollution, affecting global health. Converting agricultural waste to organic manure reduces the problems of pollution. Existing machine used in conversion has low efficiency in terms of throughput capacity and size reduction, leading to slow composting. This study focuses on the evaluation of a specially developed waste shredder for fast composting (maize straw). The machine was designed to handle substantial volumes of agricultural waste, operated at different speeds (i.e. 300, 600, 900, 1200 and 1500 rpm) and time (i.e. 0.5, 10, 1.5, 2.0 and 2.5 hr). The components of the machine included shredding drum equipped with three sets of blades, a feeding tray, sieve, engine seat and an outlet. Performance evaluation carried on the machine includes shredding efficiency and throughput capacity. A standardized Response surface methodology (RSM) was employed to maximize efficiency varying the operational speeds and shredding time. Results showed achieved maximum shredding efficiency of 91% and maximum throughput capacity of 585 kg/hr when the machine was operated at 1,500 rpm for 1.5 hr. In addition, the machine is portable, low energy and easy to operate for any agricultural waste.

Waste Management Based On Waste To Energy Technology In Palopo City

The volume of waste in Indonesia especially in Palopo City increases every year, while the quality of waste management does not show good performance. The large population makes high consumption including energy needs, even though most of the national energy needs come from coal which is a source of pollutants. Waste to energy (WTE) is a modern waste management that utilizes waste into renewable energy, the conversion of waste into energy can be done with landfill gas (LFG) technology and incineration. The study aims to analyze the potential of waste management based on waste-to-energy technology in Palopo City. Quantitative descriptive research with observation and documentation instruments. To calculate the potential energy produced using LandGem-v302 and mathematical equations, to assess the feasibility of economic value using the criteria npv, irr, brc, and pp. The results of this study show that gas landfill technology has the potential to produce renewable energy. The results of the economic feasibility assessment of gas landfill technology meet all four criteria, thus the development of gas landfill technology can provide economic benefits. The results of incineration technology research have the potential to produce renewable energy. But from the results of the economic feasibility assessment unlike gas landfills, the combustion technology does not meet one of the economic value feasibility criteria. So the development of centration technology is not recommended to obtain economic benefits, the development of incineration technology is recommended to reduce waste.

Assessing the Potential Climate Impacts and Benefits of Waste Prevention and Management: A Case Study of Sweden

This study employs a life cycle perspective to analyze the carbon footprints of various waste streams, evaluating 52 cases across 26 types of household waste in Sweden, with a focus on waste prevention and management. It demonstrates that while recycling can reduce carbon emissions, prevention could significantly enhance these benefits, with savings ranging from −36.5 to −0.01 kg-CO2-eq per kg of waste. Notably, Waste Electrical and Electronic Equipment (WEEE), textiles, tires, residual household, and plastic waste are the top five fractions most amenable to prevention on a per mass basis. Further analysis, considering waste volumes, shows that targeted recycling of materials like WEEE, metals, and paper could account for over 80% of potential carbon savings. However, the majority of potential climate impact is attributed to the energy recovery of unsorted (mixed) waste, contributing to more than 90% of total impacts. Redirecting all mixed waste to recycling could triple carbon savings, but focusing on prevention could potentially increase benefits twenty-sevenfold, particularly for waste like WEEE, food, and textiles. This research provides a valuable tool for identifying key areas in waste management to optimize climate benefits and enhance public awareness. However, it advises using local data for precise planning due to inherent uncertainties.

Development and performance evaluation of a mini plastic crushing machine

Global plastic production has seen a significant surge owing to its versatile applications resulting in a large volume of plastic waste polluting the environment. However, the high cost and size of plastic crushers have hindered efficient plastic recycling efforts. This research focused on creating a cost-effective, portable plastic crusher tailored for local use. The machine comprises four main units: the feeding, grinding, power, and framework units. A 3D model was crafted using Solid Works software (2017 version 25), and essential components were constructed from mild steel. The feeder has a capacity of 837480 mm3, a 20 mm diameter shaft with a power rating of 2.078 kW, and an outlet volume of 748692 mm3. Performance tests using High-Density Polyethylene (HDPE), Low-Density Polyethylene (LDPE), Poly Vinyl Chloride (PVC), and Polyethylene Terephthalate (PET) indicated throughput capacities of 2.83, 2.71, 6.00, and 1.60 kg/h, respectively. The machine has efficiencies of 73.3%, 53.85%, 60%, and 50% for HDPE, LDPE, PVC, and PET, respectively. Notably, the portable plastic grinding machine excels in grinding HDPE, making it highly recommended for small and medium-sized enterprises. This innovation focused on bolstering plastic recycling efforts in localized contexts.

Environmental and living organisms’ disaster caused by discharge of drilling fluid waste

The oil and gas industry plays a vast and vital role in our society. Despite the numerous benefits of the production of crude oil, its activities pose a lot of dangers to the environment and living organisms because it generates a huge volume of solid and liquid wastes, thus, these wastes require treatment before disposal. The major drilling wastes are drilling muds, drilling cuttings, and obnoxious gas emissions. Parameters that should be considered during the disposal of decontaminated drilling muds and drill cuttings are heavy metals. These wastes are introduced into the environment through accidental spills as well as intentional discharge. The discharge into the environment has effects on humans, plants, birds, soil, and also aquatic life. Generally, oil based drilling fluid usage and disposal are not preferable. However, water based drilling fluid and synthetic based drilling fluid can be a technically and economically disposed because they are biodegradable. Generally, drilling waste disposal options are offshore disposal, onshore disposal and drill cuttings re-injection. Zero discharge can achieved by drill cuttings re-injection. However extensive study must be carried before drill cuttings can be re-inject to the formation. Disposal options must be evaluated based on economics, environment and operational aspects. This study aimed at evaluating the heavy metals present in the drilling fluid waste and drilling cuttings. The experiment was achieved with the aid of a Flame Atomic Absorption Spectrophotometer (FAAS). Upon the investigation, it was discovered that lead concentration in drilling cuttings was the highest with the concentration of 1,058.9 mg/l and drilling fluid was 190.3 mg/l whereas NUPRC limit is 5 mg/l; the total chromium concentration in drilling cuttings was 19.16 mg/l and drilling fluid was 8.38 mg/l whereas NUPRC limit is 8 mg/l; zinc was 58.10 mg/l in drilling cuttings while in drilling fluid it was 23.96 mg/l whereas NUPRC limit is 50 mg/l; silver concentration in drilling cuttings was 14.67 mg/l and drilling fluid 0.91 mg/l whereas NUPRC limit is 5 mg/l; Cadmium concentration in drilling cuttings was 2.17 mg/l and drilling fluid was 1.36 mg/l whereas NUPRC limit is 1 mg/l. In no doubt. The study has shown that disposal of this drilling fluid waste and drilling cutting directly into the environment without treatment will be detrimental to the living organisms and therefore should be discouraged.

The Application of Microbially Induced Calcium Carbonate Precipitation (MICP) Technology in Building Materials and its Contribution to Waste Resource Utilization

Abstract: In many countries around the world, waste generation has become an increasingly pressing issue, particularly in urban areas experiencing rapid population growth and industrialization. The volume of waste produced by human activities continues to rise, posing significant challenges to the environment, economy, and public health. Improper waste management can lead to air and water pollution, soil degradation, and the spread of diseases. Additionally, waste generation consumes substantial natural resources and energy, exacerbating resource depletion and contributing to greenhouse gas emissions.To address these challenges, sustainable waste management practices are essential to reduce waste generation and promote resource recovery and recycling. In this context, the development of innovative technologies, such as Microbially Induced Calcium Carbonate Precipitation (MICP) in building materials, offers an effective means of converting waste into valuable and sustainable applications. MICP is an environmentally friendly biogeochemical technique that employs microorganisms and chemical agents in biological processes to produce carbonate minerals, providing an energy-efficient, cost-effective, and sustainable solution to environmental and engineering challenges.Recent research indicates that waste streams can substitute for several MICP chemical components in microbial and cementitious agent growth media. MICP technology has been found not only to be effective in handling hazardous waste streams but also to be a cost-effective and sustainable solution applicable to various waste media. This comprehensive review aims to provide insights into the environmental advantages and engineering applications of MICP technology, with a particular focus on the potential contributions of waste streams. It also offers guidance for researchers on identifying and overcoming challenges associated with using waste streams for MICP technology applications.

Comparison of PetrifilmTM AC and Pour plate techniques used for the heterotrophic aerobic bacterial count in water.

Heterotrophic bacteria (HPC) are commonly found in water samples. While these bacterial counts do not necessarily indicate a health hazard, high counts provide a good indication of the efficiency of water disinfection and integrity of distribution systems. The aim of this study was to compare the PetrifimTM AC method to the Pour Plate technique for the testing of HPC in water samples. Artificially contaminated (192 samples) and natural water samples (25) were processed using two methods. Both methods accurately detected high, medium and low counts of HPC, producing average Z scores between -2 and+2. Paired-wise student t-test and correlation coefficient showed nonsignificant differences between the results of two methods. Acceptable repeatability and reproducibility was obtained using both the methods. Uncertainty of measurement for PetrifilmTM AC and Pour Plate method was found to be 2.9% and 5.4% respectively. PetrifilmTM AC proved to be robust at 33°C and 37°C. In conclusion, PetrifimTM AC, which is easy to process, read and less time consuming, proved to be comparable to the conventional Pour Plate method in establishing HPC in water. In addition, PetrifimTM AC requires less space for the processing and incubation, generate small volume of waste for disposal and requires no equipment, except for the incubator.

WASTEWATER TREATMENT DESIGN OF KAMPAR STATE POLYTECHNIC CPO PURIFICATION LABORATORY

Kampar Polytechnic has a miniplan laboratory for processing CPO into cooking oil, biodiesel, and soap. During its operation, this processing produces liquid waste and solid waste. The waste released must be treated before being discharged into the environment, provided that the amount of COD reduction efficiency is good enough (63,41%). The COD content in wastewater is still above environmental quality standards. To reduce COD according to permissible standards, recycling is carried out with effluent from the sedimentation process returned to the equalization unit. The design of equalization, coagulation, and flocculation tubs has been successfully carried out. The results obtained are the dimensions of the equalization bath at 2m length, 2m width, and 1.2m height. The dimensions of the coagulation bath are 1.5m long, 1.0m wide, and 1.2m high. The dimensions of the flocculation bath are 2.5m long, 1.5m wide, and 1.2m high, with the provision that consideration meets the volume of liquid waste treated.

The former industrial site of the Angarsk Metallurgical Plant (Svirsk, Russia) 10 years later: current geochemical state and interannual change analysis based on Earth remote sensing data

   As part of proactive geoecological research, the purpose of which was to assess the impact of waste from the industrial site of the Vostsibelement plant on the ecosystem of the town of Svirsk (Irkutsk region), the authors discovered anomalies with strong arsenic and polymetallic contamination located 200 m north-west from the boundary of the industrial site of the “Vostsibelement” plant. Part of the contaminated site is the former industrial site of the Angarsk Metallurgical Plant, which was successfully remediated in 2009–2013. This raised the questions of a detailed study of the current environmental and geochemical situation at the site and identification of the processes causing the presence of significant contamination on the previously successively reclaimed site. To estimate the current geochemical state of the site, an environmental-geochemical survey, which was four times more detailed than the requirements of the state standard, was carried out, accompanied by rapid X-ray fluorescence analysis of samples. As a result, it was found out that on the area of more than 30 hectares,13 hectares of which belong to the former industrial site of the Angarsk Metallurgical Plant, the present pollution exceeded the standards for arsenic, lead, copper and zinc by tens and hundreds of times. At the same time, it was determined that the nature of pollution and the spatial localization of the main anomalies had changed relative to the initial situation in 2009: currently, pollution is concentrated in the peripheral areas of the industrial site and beyond and is chaotic in nature (pollutant concentrations in neighboring samples, even taken over a mesh of 50×50 m, may differ by hundreds of times). The sites reclaimed with soil removal feature no significant contamination. For a retrospective analysis of changes in the situation at the site during reclamation works in 2009–2013 and after their completion, until the summer of 2022, the analysis of Landsat and Sentinel satellite multispectral sensing data was applied. With a time resolution of no worse than one image per month, the materials in the visible and near-infrared range were analyzed. The normalized differential vegetation biomass index (NDVI) was chosen to be the main informative indicator as it clearly reflects the facts of changes in the surface type of the industrial site and allows to assess the vegetation development on the site, which is an important indirect indicator of the environmental and geochemical situation. As a result, a good convergence of geochemical and remote sensing data was established and it was shown that reclamation measures had been carried out to the required extent and gave a noticeable result: the measures taken to remove the polluted soil and deliver conditionally clean and conditionally fertile soil are clearly recorded. A positive geobotanical effect from these measures is noticeable since there is the change in the vegetation type and biomass increase in the reclaimed areas compared to peripheral areas left for self-overgrowth by native vegetation. It is shown that with the time this effect disappears and a single type of vegetation is formed on the area. However, no obvious facts of significant technogenic impact on the industrial site after the end of monitoring activities in 2016 according to multispectral satellite data were revealed. There was not any soil removal or delivery of large volumes of waste on the site. The vegetation developed synchronously with the background areas. Thus, the study reliably confirmed the fact of pollution and described it in detail, tracked the progress of reclamation measures and proved the presence of positive environmental effects. It also refuted the hypothesis about the possibility of secondary pollution as a result of obvious anthropogenic influence. At the same time, it is shown that geochemical studies of such objects conducted in accordance with current state standards can distort understanding about their condition, while greater methodological freedom of scientific research compared to the work within the framework of government assignments allows to reveal the chaotic nature of pollution in the peripheral areas of the area and beyond. But even the achieved detailed description definitely does not allow us to consider the ecological and geochemical characteristics of the object presented in the article as final as it seems necessary to thicken the sampling mesh at least by four times. The degree of probable “soft” gradual pollution of the industrial site due to the transfer and migration of pollutants from nearbyт objects (up to II hazard class), which can be sources of additional secondary pollution with all detected elements, also remains unexplored. Thus, the data obtained indicate the need for an additional set of engineering and environmentalт work that goes far beyond the scope of the proactive scientific research. The methodological conclusion from the work is the proof of the applied approach effectiveness and applicability to geoecological research, which can make it possible to assess the current situation quickly, reliably and at low cost as well as to analyze, confirm or refute the hypotheses about the development of the situation and therefore can be successfully used in other similar cases.

Waste Management System: A Case Study of Waste Bank Management Toward a Circular Economy in Maros Regency

Waste management has been in the spotlight recently due to the annual escalating volume of waste generated. The concept of a circular economy has emerged as a viable economic framework that aligns with sustainable development objectives, particularly those concerning responsible consumption and production practices to support local economies. This article seeks to assess the efficacy of waste bank management in fostering the development of an efficient municipal waste management system conducive to a circular economy with a robust waste recycling infrastructure. This study employed a descriptive qualitative interpretative approach underpinned by a phenomenological framework. Data were gathered from diverse reputable sources such as journals, books, and other relevant references, which the author subsequently analyzed. The findings indicate that waste management in Maros Regency has been operating optimally, driven by stakeholder involvement in promoting waste disposal practices within the community. Establishing the Turikale Main waste bank is a testament to the success of transitioning waste management towards a circular economy model. This initiative facilitates waste recycling and empowers the local economy, generating substantial monthly revenue independently. The significance of this research lies in its capacity to offer valuable insights and recommendations for researchers seeking to evaluate and formulate waste management strategies anchored in the concept of waste banks, which can be replicated in other regions.

Examining the Challenges for Circular Economy Implementation in Construction and Demolition Waste Management: A Comprehensive Review Using Systematic Methods

The construction industry accounts for approximately one-third of the total waste generation globally. With the United Nations projecting a population increase of 2 billion within the next three decades, there is a heightened demand for building stock, generating unprecedented volumes of construction and demolition waste (CDW). To combat this, circular economy strategies are purported to help alleviate the prevailing situation. But a number of challenges are jeopardizing their implementation in the construction industry and preventing from achieving the UN Sustainable Development Goals, net zero carbon and zero avoidable waste targets. This paper systematically analyzes 54 research articles, published in the past decade within major peer-reviewed English-language scholarly publications in the form of a systematic research review. In doing so, it aims to identify and classify the challenges that prevent improved CDW management by assimilating previous research results in support of a circular economy. The classification and analysis using a PESTLE model offers insights into gaps and differences between categories, as well as regions and countries. This initial step could contribute to a better understanding of these barriers, along with associated solutions, which could result in a significant reduction on the impact of construction activities, therefore facilitating the development of an effective circular economy in the sector.

Assessing the current status, classification, collection, and transportation of domestic solid waste in Hai Hau district, Nam Dinh province

The article presents the current status, classification, collection, and transportation of domestic solid waste in Hai Hau district, Nam Dinh province. The research results show that the volume of domestic solid waste generated in Hai Hau district, Nam Dinh province is 147.468 tons/day and the average generation coefficient is 0.53 kg/person/day. The main source of waste generation is the daily activities of households, markets, and commercial centres... The composition of domestic solid waste includes organic matter (about 74.64%), recyclable inorganic matter (about 14.32%), non-recyclable inorganic matter (about 10.36%), and a small amount of hazardous solid waste (about 0.68%). Regarding the classification of domestic solid waste at source, people are aware and have classified it themselves but still do not fully understand the meaning and benefit of classifying solid waste at source. Regarding collection and transportation, people actively participate in the environmental cleaning programs, apply solutions to minimise domestic solid waste, and coordinate with the unit in charge of collecting and transporting domestic solid waste. The amount of domestic solid waste generated by 2030 is forecasted to be 156,144 tons/day, equivalent to 56,992.62 tons/year.

Waste-to-Energy Generation: Complex World Project Analysis

Sustainable development and the circular economy mandate efficacious management of waste. The annually increasing volumes of municipal solid waste pose a formidable global challenge. Waste-to-energy conversion, utilizing thermochemical or biochemical technologies, presents a viable solution for mitigating waste disposal concerns. This study conducts a thorough analysis of extant projects to evaluate the economic viability and environmental benefits across various technologies. Employing a self-compiled, unique database, our examination spans enterprises operational from 1980 to 2022, including 37 of the most representative facilities across Europe, North America, and East and Southeast Asia. Economic efficiency is gauged through the levelized cost of electricity generated by these installations, while environmental impacts are assessed based on the statistics on prevented greenhouse gas emissions. The methodology encompasses correlation and techno–economic analyses and expert evaluation. Contrary to conventional wisdom, our findings challenge the ubiquity of scale effects among technologies and the presumed decline in electricity generation costs with newer technologies. However, they corroborate the enhanced environmental benefits of recent technological advancements. The insights derived from this research are poised to inform strategic municipal solid waste management planning in Russia and beyond, offering a foundation for the design of new facilities. The scientific novelty of this work lies in its holistic approach to analyzing the ecological and economic efficiencies of all extant technologies.

Sustainability assessment of orange peel waste valorization pathways from juice industries

AbstractA wide variety of products such as high value-added bioactive materials, biofuels, biochemicals and bioplastics can be obtained by the valorization of waste streams in a comprehensive and holistic biorefinery concept. In this study a meta-analysis of the available technologies utilizing organic waste derived from the juice industry is conducted. Initially, a mass flow analysis is performed to quantitatively illustrate the available orange peel waste volumes in the EU followed by a geographic distribution. The overall sustainability of the available valorization scenarios is then analyzed by considering critical environmental, economic and energy indicators and comparing innovative and conventional valorization technologies. Innovative technologies are better in terms of energy requirements and extraction time and also, in product yield and environmental performance than the conventional ones (85.1%, 9.5% and 47.9% lower CO2 eq values for the extraction of essential oils, pectin and phenolic compounds respectively). In terms of orange peel waste valorization scenarios, landfilling shares the largest environmental impact, followed by thermochemical and biological conversion alternatives. Complex biorefinery schemes are proportionate to environmental performance and energy consumption, but inversely proportionate to production cost. Finally, a trade-off analysis illustrates a positive correlation between environmental indicators of the most under study valorization scenarios.