Volume Of Solid Waste Research Articles

Students’ Perception Towards Solid Waste Management and Environmental Sustainability of Nnamdi Azikiwe University Campus, Awka

Nigeria’s rising population makes waste generation an inevitable endeavour. In the journey of national development, waste generation is static. With a population of over 170 million, Nigeria produces a staggering volume of solid waste, of which less than 20% is collected through a formal system. Waste generation on the Nnamdi Azikiwe University campus, Awka, has remained contentious as generated waste is neither categorised nor recycled for re-usage purposes. The survey research method was adopted for this research, with the questionnaire utilised as research instrument. This study included the entire population due to size manageability. Statistically, descriptive and inferential statistical analyses were fit for purpose and, hence, utilised. Findings revealed that biological processing of waste and environmental waste management education would result in the environmental sustainability of the Nnamdi Azikiwe University campus, Awka. This study recommends that the university management prioritise building a biological waste processing facility and champion the creation of environmental waste management education awareness for improved harmful waste generation and control.

An assessment of household solid waste management in Mainpuri, Uttar Pradesh, India

<p>Rapid industrialization, urbanization, population growth, and migration from rural areas have resulted in increased solid waste generation in developing cities, which is commonly regarded as the most significant urban issue. The improper disposal of waste and inefficient collection methods is a significant problem in most of the municipalities in Indian cities. This challenge is further compounded by unscientific waste treatment practices, lack of modern technology, and limited resources. This study aims to assess the status of solid waste generation and disposal across different household income groups and to evaluate how Mainpuri manage and handles the solid waste management system. The study is based on primary data collected through a household survey in Mainpuri city, covering a sample of 1,836 households from various income groups. The data used in this assessment was collected from household surveys and government records. Although there is a recycling plant in operation, its capacity is inadequate to address the increasing waste generation and demands of the community. This shortfall underscores the need for enhanced waste management strategies and infrastructure to effectively cope with the rising volumes of solid waste. As a result, large quantities of solid waste accumulate in low-lying areas near the Isan River and the proximity of the plant. Without a comprehensive solid waste management plan in the municipality, the situation is likely to deteriorate further. Mainpuri City urgently needs a sustainable strategy to effectively manage its solid waste, addressing both current challenges and future demands. Implementing such a strategy is essential for improving public health, environmental conditions, and overall quality of life in the city.</p>

Unlocking the potential of environmentally friendly adsorbent derived from industrial wastes: A review.

With increasing urbanization and industrialization, growing amounts of industrial waste, such as red mud (RM), fly ash (FA), blast furnace slag (BFS), steel slag (SS), and sludge, are being produced, exposing substantial threats to the environment and human health. Given that numerous researchers associate with conventional adsorbents, developing and utilizing industrial wastes derived from adsorption technology still has received limited attention. Utilizing this waste contributes to developing alternative materials with superior performance and significantly reduces the volume of solid waste. The excellent physical and chemical characteristics of these wastes are also investigated in this paper. This review attempts to demonstrate a comprehensive overview of the application of industrial waste-based adsorbent in the adsorption process for removing organic pollutants, dyes, metallic ions, non-metallic ions, and radioactive substances. In addition, industrial waste-based adsorbents are among the most promising and applicable techniques for pollutant removal, offering remarkable adsorption efficiency, rich surface chemistries, reasonable cost, simple operation, and low energy consumption. This review summarizes state-of-the-art advancements in engineered adsorbents (including physical and chemical modifications). It provides a holistic view regarding a comprehensive understanding of the mechanism involved in adsorption for water remediation. The challenges and the prospects for future research in applying these adsorbents are also elucidated, contributing to sustainable waste management and environmental sustainability.

The factors influencing waste management for economic development—the perspective of Nelson Mandela bay municipality residents

The rapid increase in volume and variety of solid waste as a result of continuous economic growth, urbanization, and industrialization has become an intractable problem for the public and private sectors, making it difficult to ensure effective and sustainable waste management. The study sought to understand the perspective of Nelson Mandela Bay Municipal residents on their perceived influence of municipal waste management on economic development. The study used a quantitative techniques approach, with a structured questionnaire. Data was collected from 255 respondents. The quantitative question aimed to determine if the influence was positive or negative, and the Likert scale question had a scale of 1 to 5. This research identified various types of waste, assessed challenges, and evaluated waste's potential for resource creation. The study concluded that municipal waste includes organic, paper, plastic, metal, glass, food, garden, hazardous, construction, demolition, and non-recyclable waste. Environmental pollution is a major challenge, and 26 factors positively influence waste to wealth. Waste to wealth can be achieved through social behavior, education/knowledge, MSWM governance, and economic feasibility for MSWM. The research also highlighted the importance of land attributes, budget allocation, trained personnel, and government regulations. The framework proposed aims to minimize urban poverty while preserving the environment and supporting the present urban economy. Urban communities can utilize solid waste management as a mechanism to foster economic development. The fundamental question is whether stakeholders will continue to ignore waste's potential demands and benefits for urban economic growth.

Legal aspects of solid waste recycling and disposal in Kazakhstan: international standards and national regulation in the context of a circular economy

The Republic of Kazakhstan, possessing significant natural resources and a rapidly developing economy, is faced with growing volumes of municipal solid waste (MSW), which requires effective measures for their processing and disposal. The main purpose of this study is to analyze the legal aspects of solid waste management in Kazakhstan, assess the compliance of national legislation with international standards and explore the potential for integrating the principles of a circular economy. The study covers the current state of the legal regulation of solid household waste in Kazakhstan and identifies key problems. The use of methods of political and legal analysis, comparative legal approach and system analysis helps to assess how modern initiatives can contribute to improving solid waste management and maintaining environmental balance. The conclusions of the study indicate the need to improve the legislative framework of Kazakhstan for the management of solid household waste. The introduction of a new Ecological Code based on the European principles of waste management hierarchy and extended producer responsibility is an important step forward. However, further progress requires the adoption of the Law “On Waste”, which would specify the implementation of the principles of the circular economy. The importance of creating conditions for small and medium-sized businesses in the field of waste recycling and increasing environmental awareness of the population through informing and involving public organizations and the media is also emphasized.

Experimental evaluation of municipal solid waste air-gasification in a pilot-scale reciprocating moving-grate furnace

The increasing volume of municipal solid waste (MSW) worldwide presents significant environmental challenges, necessitating the development of efficient waste-to-energy (WtE) solutions. Among various thermochemical methods, gasification offers a promising approach for converting MSW into syngas, which can be utilized for energy generation. This study investigates the gasification characteristics of MSW in a pilot-scale reciprocating moving-grate furnace, focusing on the effect of key operating parameters such as equivalence ratio (ER), gasification temperature, and gasifying agent-staged ratio on gasification characteristics.Seven experimental schemes were tested with varying lower heating values (LHV) of MSW (ranging from 6.98 to 15.1 MJ/kg) and throughputs (ranging from 0.77 to 1.67 tons per day) to assess the adaptability and stability of the moving-grate system under different conditions. The results indicate that an ER between 0.6 and 0.7, a gasification temperature of 760 °C, and a gasifying agent-staged ratio of 7:3 are optimal for achieving a maximum energy conversion efficiency of 71.6 %. It was observed that the LHV of syngas decreases when the gasification temperature exceeds 850 °C due to increased oxidation of light hydrocarbons. Moreover, the study highlights the influence of grate moving speed on residence time and reaction completeness, which are critical for optimizing syngas yield and quality.The findings demonstrate that while the maximum energy conversion efficiency of the moving-grate system is lower than other reactor types, its lower capital and operating costs, due to the lack of dedicated feedstock pretreatment, make it a viable option for small-scale and pilot-scale applications. This study provides valuable insights into optimizing MSW gasification processes and underscores the potential of the moving-grate furnace for adaptable and cost-effective WtE applications. The novelty of this work lies in the comprehensive evaluation of the moving-grate gasification process under varied operating conditions, providing a foundation for future research on improving efficiency and reducing environmental impact in large-scale MSW management.

Сharacteristics of demolition waste management in the regions of Ukraine

The volume of waste left from war-related destruction amounts to 10-12 million tons per year. Such volume is comparable to the annual volume of municipal solid waste generated in Ukraine. This situation led to formation of unauthorized landfills and complicated the existing problem of industrial, consumer, construction and demolition waste management. Consequently, the issue of destruction waste management became a pressing environmental and socio-economic problem. The objective of this research is to assess the characteristics of destruction waste management in the regions of Ukraine. Destruction waste is generated during construction of new buildings and public structures, as well as during renovation or demolition of existing buildings and structures; including general-use facilities. It is estimated that, before the war, nearly 7 million tons of construction and demolition waste was generated annually, with more than 50% being transported to municipal solid waste landfills. Specialized landfills for its disposal were virtually non-existent in the regions of Ukraine, so this waste, despite its resource value, was taken to municipal solid waste landfills or unauthorized dumps. Some components of construction and demolition waste are toxic. Destruction waste includes parts (fragments) of damaged (destroyed) objects, as well as materials and items that were inside or next to such objects at the time of damage (destruction) and/or during disassembly activities, including those that fully or partially lost their consumer properties and cannot be reused at the place of their origin or discovery. Destruction waste pollutes the environment, so one of the ways to reduce environmental risks is to develop an effective waste management system to stop chaotic processes during disassembly activities. Destruction waste differs from construction and demolition waste by the presence of accompanying hazardous components, complicating the development of a waste management system. The main components of destruction waste should be used as secondary raw materials for construction, production of building materials and other purposes. Provided that appropriate physical-geographic, engineering-geological, hydrogeological, technical, and socio-economic conditions are available, it is advisable to create temporary waste storage sites, with their subsequent use as secondary raw materials in the post-war period for restoration of civil, industrial, and transport infrastructure in the regions of Ukraine.

Hazard reduction of heavy metals by co-pyrolysis of modified vermiculite with paper mill sludge/municipal solid waste: Characterization, risk and reaction mechanism study in pyrolytic environment

The increasing volume of paper mill sludge (PM) and municipal solid waste (MW) poses environmental problems associated with heavy metals. Co-pyrolysis of PM/MW with additives effectively reduces the risk of heavy metal contamination. In this study, co-modified vermiculite (LMV) was prepared using the modification methods of intercalation-exfoliation, Mg2+ impregnation, and thermal activation. PM and MW were mixed at different doping ratios, and a non-doping experiment was performed to compare the pyrolysis processes and the retention rates for different heavy metals (Zn, Cr, Cu, Cd, and Pb), as well as the potential ecological risks, and the form distribution of the heavy metals. The addition of LMV reduced the risk posed by heavy metals. In the absence of doping, a higher pyrolysis temperature is conducive to an increase in the oxidizable and residual fractions of heavy metals without higher retention rates. Among these heavy metals, Zn, Cr, and Cu had higher retention rates and low risks, whereas Cd had a relatively high risk with low retention rates. Simulations showed that there was a transfer of the Mulliken charge after the reaction, indicating that all the heavy metals can interact with O, Al, and Si in the LMV; this reaction mainly occurs around the No. 17 O atom of the LMV. The monomers, oxides, and chlorides of Zn/Cr/Cu exhibited better adsorption on vermiculite compared to that of Pb/Cd.

Upcycling drinking bottle waste to intercalated 2D-0D carbon architectures and its supercapacitor applications

Despite its many benefits to our modern life, plastic contributes a large volume of solid waste that increasingly threatens our environment and health. Through a hydrothermal depolymerization and carbonization process that involves nitric acid and ethanol, drinking bottles that are made of polyethylene terephthalate are successfully converted into carbon quantum dots (CDs) and thin carbon nanosheets simultaneously with the former intercalated between layers of the latter to form a unique ball-sheet architecture. When used as electrode material, the stacking carbon nanosheets in this plastic-derived, ball-sheet carbon (PBSC) structure create a conductive network to allow rapid transport of ions and electrons while the well-dispersed CDs offer a large surface area and numerous sites to host them. The supercapacitors made of these PBSC electrodes exhibit double-layer capacitor behaviors with a specific capacity reaching 237 F/g at a charge rate of 1 A/g and excellent cycling stability. Our efforts offer a new route to upcycle plastic waste as valuable energy storage materials, which may help boost its recycling and the sustainable deployment of various clean energy resources.

Assessment and characterization of solid and hazardous waste from inorganic chemical industry: Potential for energy recovery and environmental sustainability

Rapid global urbanization and economic growth have significantly increased solid waste volumes, with hazardous waste posing substantial health and environmental risks. Co-processing strategies for industrial solid and hazardous waste as alternative fuels highlight the importance of integrated waste management for energy and material recovery. This study identifies and characterizes solid and hazardous industrial wastes with high calorific values from various industrial processes at Nirma Industries Limited. Nine types of combustible industrial wastes were analyzed: discarded containers (W1), plastic waste (W2), spent ion exchange resins from RO plants (W3), sludge from effluent treatment in soap plants (W4), glycerine foot from soap plants (W5), rock wool puff material (W6), fiber-reinforced plastic waste (W7), spent activated carbon (W8), and spent cartridges from reverse osmosis plants (W9). Physical characterization, proximate and ultimate analysis, heavy metal concentration evaluation, and thermogravimetric analysis were conducted to assess their properties, revealing high calorific values exceeding 2500 kcal/kg. Notably, W1 and W2 exhibited the highest calorific values (∼10,870 kcal/kg), followed by W6 and W8 (∼6000 kcal/kg) and W9 (∼8727 kcal/kg). Safe heavy metal levels are safe, and high calorific values support the prospects of energy recovery and economic and environmental benefits, reducing landfill reliance and enhancing sustainable waste management.

Экологический аспект устойчивого развития высокогорных регионов в условиях формирования инновационной экономики

Sustainable development of high-mountain regions is one of the key tasks of the modern world in the context of growing environmental problems and the need to transition to an innovative economy. High-mountain regions, such as the territories of the North Caucasus Federal District (NCFD), are characterized by unique natural conditions, but at the same time they face many environmental challenges associated with active economic activity, climate change and anthropogenic impact. These territories are particularly vulnerable to environmental risks, which requires the development of integrated approaches for their sustainable development. The formation of an innovative economy provides new opportunities for achieving environmental sustainability in high-mountain regions. Innovative technologies and environmentally friendly approaches to production can help reduce the negative impact on the environment, improve the quality of life of the local population and increase the competitiveness of the region. However, the transition to such a development model requires a comprehensive assessment of environmental aspects, which will take into account the specifics of natural conditions, socio-economic factors and the characteristics of the economic activity of these territories. The objective of the study is to analyze current environmental problems of mountainous territories and improve initiatives taken to ensure environmental safety in the context of transition to an economy of advanced scientific and technological development. Research methods. The study was conducted on the basis of dialectical cognition, system and comparative approaches, forecasting, classification, induction and deduction, the method of processing statistical and empirical data. Research results: 1) the state of the territories of the North Caucasus Federal District was analyzed from the point of view of environmental safety; 2) world experience was studied using the example of innovation-oriented countries regarding issues of environmental conservation in the process of increasing production capacities; 3) an analysis of the tools used by government bodies was carried out in order to maintain consensus between the ongoing environmental and innovation policies; 4) innovative ways to solve the problem of ensuring environmental safety in the studied mountainous regions of the country are presented. Conclusion. The study provided a comprehensive analysis of the environmental aspects of sustainable development of the highland regions of the North Caucasus Federal District (NCFD) in the context of the formation of an innovative economy. It was revealed that the environmental situation in most regions of the North Caucasus Federal District remains unfavorable, despite significant investments in improving infrastructure and modernizing production. The main problems are air and water pollution, degradation of agricultural land, accumulation of waste and deterioration of forests. High emissions of pollutants from mobile and stationary sources, discharge of contaminated wastewater and growth in the volume of municipal solid waste have a negative impact on the environmental situation. As a result, the quality of life of the population deteriorates, health risks increase, and the productivity of agricultural land decreases, which has a negative impact on the economy of the region. To solve these problems, it is necessary to implement a comprehensive approach, including the introduction of innovative technologies in industry and agriculture, improving the waste management system, developing environmental monitoring and modernizing production. An important role should be played by government support measures aimed at stimulating environmentally oriented investments and reducing the man-made burden on the environment. China, which is actively developing “green” investments and reducing the negative impact of industrial enterprises, can serve as an example of a successful environmental policy. China’s experience can be useful for Russia in developing long-term environmental safety strategies. Thus, to ensure sustainable development of high-mountain regions in the context of an innovative economy, it is necessary to form a comprehensive system of measures aimed at protecting the environment, improving public health and increasing the competitiveness of the region.

AN ENGINEERED SYSTEM FOR SOLID WASTE COLLECTION IN SAMARU, ZARIA, NIGERIA

Solid waste includes all materials that are firm and stable in shape including semisolid materials that are no longer considered of sufficient value to be retained in a given setting. Solid waste generation rates and patterns within the study area were mapped out through GPS, Google route software, AutoCAD, ArcGIS, GPS, Route optimization software, measuring tape, Marker, Containers of equal volume, Record book, Calculator, and Stopwatch. Eleven sacks were used to collect solid waste from eleven different households daily within three months of the wet and dry seasons of the year. The highest average volume of solid waste generated per household per week in Samaru was in the dry season =0.25 m3. The dry season witnesses a substantial volume of 0.206 m³ for garbage organic materials, constituting 66.45% of the total composition. In the wet season, this volume remains significant at 0.104 m³, accounting for 61.18% of the total composition. The highest percentage of organic materials (garbage) during both seasons suggests a need for improved organic waste management. The minimum allowable capacity of the solid waste collection containers for the designed system is 10 m3 considering a minimum of two containers per city block

Mechanism study of synergistic aluminum extraction and purification by ammonium for high-value conversion of secondary aluminum dross

Secondary aluminum dross (SAD) constitutes a significant volume of hazardous solid waste with huge productions. Balancing extraction efficiency and purity within the current resourcing recovery process proves challenging and impedes high-value conversion. Consequently, the NH4HSO4-H2SO4 system was employed in this study to convert SAD into high-purity alumina nanoparticles, and the effect of ammonium was investigated. The results indicated that the leaching rate reached 85.98 % under the optimum conditions (170 °C, [Htot]=12 mol/L, 16/1,6 h); the interaction of NH4+ and H+ with the oxygen atoms on the surface of Al2O3 was demonstrated to enhance the reactivity of the aluminum atoms by DFT calculations. The incorporation of NH4+ also facilitated the separation of aluminum by leveraging the temperature-dependent solubility characteristic of NH4Al(SO4)2. Molecular dynamics simulation revealed that NH4+ inhibits the diffusion rate of Al3+, thereby regulating the doping impurities such as Mg and Ca, and improving the purity of Al2O3 (95.29–99.64 %). Additionally, Nanoscale regulation was executed through the conversion of the NH4AlO(OH)HCO3 precursor and control. The sintering and agglomeration problems brought about by pyrolysis in atmospheres such as H2O and SO3 were avoided. This research provides reference for the high-value utilization of aluminum-containing solid waste.

The Planning of Reduced, Reuse, and Recycle-Based Temporary Disposal Site

Abstract The community-based waste management methods through reduce, reuse and recycle-based temporary disposal sites (3R-TDS) was one of the possible municipal solid waste management strategies for reducing the volume of waste. The aims of this studied were to planned and design 3R-TDS in densely populated areas by combining various 3Rbased waste management methods for obtaining a reducing volume of municipal solid waste to FDS. This studied was conducted into five main steps, that were collected primary data, calculated the density and composition of municipal solid waste, designed the 3R-TDS to determine the appropriate space based on functional processing. The results had identified the waste generation 4,454.72 kg/day or 0.431 kg/person/day, and it was predicted up to 8,930 kg/day within 10 years. The highest percentage of municipal solid waste was organic food waste 58%, and the lowest composition was leather 0.2%. Design of 3R-TDS could been applied to managed municipal solid waste had been the concept of 3R-TDS leads to arrange 973 m2, which provided area for in ordered to facilitate dropping, separating, sorting, waste processing for plastic, inorganic, organic, residue, leachate, and supporting area.

The Role of the Environmental Engineers in Environmental Sustainability

Environmental degradation has been caused by human activities in order to achieve his developmental needs. This paper examines the role of professionals and professional organizations in environmental sustainability; with specific attention to the role of the environmental engineers in environmental sustainability. Examination of environmental engineering and the environmental engineer was made; some human activities and their consequences on the environment which lead to environmental unsustainability were explained. Sustainable development is the development that meets the needs of the present without compromising the ability of future generations to meet their own needs. The environmental engineer remains the vehicle to bring about environmental sustainability by some of the following ways; devising and promoting concepts of eco-design and resource efficiency, delivering solutions for corporate and regional sustainability and low carbon economy; improving ways of assessing and treating contamination at polluted sites; devising recycling systems and developing uses for recycled materials, and reducing the volumes of solid and hazardous waste through conservation.

Boboiboy Animation Episode, Care of the Earth: Managing Solid Waste with the 3R Method

The increasing volume of domestic solid waste needs a sustainable solution to avoid complex environmental issues. The 3R practice of reuse, reduce, and recycle is said to be one of the efforts taken to educate the community on how to manage residential solid waste. A practice that wants to be cultured in the community must begin as early as childhood. As the saying goes, strike while the iron is hot. The application of environmental care practices to the younger generation can be implemented in the form of entertainment by inserting animation which attracts children’s attention. This study analyses solid waste management with the 3R method featured in Boboiboy animation. There are three episodes of Boboiboy’s animation of “Jagalah Bumi” used as the main study text (episodes 21, 22, and 23). Based on this analysis, it was found that this animation have successfully highlighted the 3R concept in three episodes of "Jagalah Bumi" including showing how the does solid waste management process is carried out at the landfill. The explanation of this method was successfully presented clearly and easily understood by the audience. This is able to influence and leave an impression on the audience indirectly.

Performance of incineration bottom ash amended marine soft clay stabilized by cement in seawater

Incineration serves as an effective waste management method driven by its ability to reduce mass and volume of municipal solid waste. However, this process generates incineration bottom ash (IBA), which is commonly disposed of in landfills in many countries, especially when dealing with fine IBA. To address this issue, recycling fine IBA for soft marine clay (MC) stabilization is a sustainable option compared to landfilling. Previous studies revealed that aggregate-like and weak hydration properties of fine IBA may increase the strength and decrease compressibility of MC. Nevertheless, when using IBA-MC in land reclamation or coastal protection, the performance may deteriorate, particularly in the presence of seawater. Therefore, this study employed chemical stabilization method combined with ordinary Portland cement (OPC), to solidify/stabilize IBA-MC (OPC-IBA-MC). The aim was to improve the performance of IBA-MC in seawater. The appearance, water content, strength, mineralogy, and microstructure of IBA-MC and OPC-IBA-MC soaked in seawater were investigated. The results showed that the strength of OPC-IBA-MC (4075 kPa) cured in air for three months was significantly higher than that of IBA-MC (983 kPa). Nevertheless, after soaking in seawater, OPC-IBA-MC was dismantled, rendering its strength untestable. The mineralogy and microstructure of OPC-IBA-MC revealed that the formation and growth of ettringite caused instability in OPC-IBA-MC in seawater.

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.

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.