Charles Mbohwa

Charles Mbohwa
University of Johannesburg | uj · Faculty of Engineering and the Built Environment

B. Sc. Hon Eng; MSc OMMS; D. Eng.

About

480
Publications
325,370
Reads
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2,836
Citations
Additional affiliations
July 2007 - January 2017
University of Johannesburg
Position
  • Professor (Full)

Publications

Publications (480)
Conference Paper
Full-text available
In order to improve the socioeconomic development of any nation, such factors as the amount and type of energy resources available, conversion and extraction pathways employed, the rate of utilization and sustainability must be addressed appropriately. Nigeria is one of the developing countries that is lagging in that regard because of poor and dis...
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To achieve sustainable management of PSWs, numerous drivers are key for influencing implementation. The chapter discusses in detail the numerous drivers that influence sustainable management of PSWs from the developed and developing economy perspectives. The drivers include incorporation of IWS into formalized systems, economic incentives, appropri...
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The evolution of sustainability is discussed for the purposes of presenting the current status in developing economies. From the definitions of sustainability presented by the United Nations, the developing economies are working with the same definition. In this regard, the chapter presents an overview of sustainability by discussing the three pill...
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Sustainable management of PSWs is a challenge faced by developing economies. To this end, the book focused on various aspects that contribute to the sustainable management of PSWs in developing economies while using the success stories of developed economies.
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This chapter summarizes the key drivers for managing PSWs from the economic, environmental and social perspectives. Drivers such as economic incentives, household education, personal behavior, environmental awareness, climate change and global warming are discussed. The chapter indicates that producer and consumer responsibility are key drivers in...
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This chapter discusses the different technologies for managing PSWs. Literature works on the different technologies are reviewed with the aim of establishing sustainable technologies for developing economies.
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The chapter provides an overview of sustainable solid waste management (SSWM). In order to understand SSWM, the definitions of solid wastes (SWs) are reviewed and gaps are identified. From the identified gaps, a new definition of plastic solid wastes (PSWs) is developed.
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An overview of the different types of plastics is presented in this chapter. Plastics are categorized into thermoplastics and thermosetting. The different types of plastics under the two categories and the purposes for which they are manufactured are discussed.
Book
This book discusses sustainable waste management technologies for managing end-of-life (EoL) post-consumer and packaging plastic solid waste (PSW) from domestic and commercial waste streams. It does so particularly in the context of providing a way forward for developing economies. Treating recycling and composting of, and energy recovery from, pla...
Article
In recent time effort is been made by researchers all over the world to developed composites materials that will be eco-friendly and low cost. Based on these, this current study focused on the development of improved thermal and fire properties of the polymer (epoxy) using Cucumeropsis mannii shell granules (CMSg). Epoxy + 20wt% CMSg composite was...
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Over the years, there has been growing calls for academia to work closely with industry and several models have been developed such as the Triple Helix framework. Generally, such models were premised on the basis of close collaboration of academia, governments and industry in such a way that academia provided the tuition and development of human re...
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The direct and dynamic relationship linking academia with industry has been the ability by academia to provide practical solutions and innovations to solve industry’s challenges. In recent years and in response to the rapid changes in technology, higher education institutions have invested in innovation hubs for incubating novel ideas as well as te...
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The ultimate expectation from any innovations that are nurtured through incubation and product development was to commercialise them for wealth creation, entrepreneurships and industrialisation. Several centres of excellence have been established in Southern Africa, either housed at or in collaboration with tertiary institutions, some of which have...
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Systems thinking has been an effective approach to managing organisations going through changes as synthesis allowed the observation of how different entities interacted and influenced how an overall system operated. The rapid changes in technology due to the fourth Industrial Revolution demanded regular and corresponding changes in skills to cope...
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Several studies carried out in Sub-Saharan Africa have pointed to the perennial and persistent shortage of skills, let alone the access to modern equipment and technology by engineering academics, resulting in the compromised quality of engineering graduates and mismatch of skills required by industry and those that tertiary institutions produced....
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Industrial operations have evolved through massive transformations and in recent years, the rate of change has been so rapid, equally requiring rapid transformations in the engineering education system. This chapter focusses on the various industrial transformations, particularly the current Industry 4.0, its impact and implications on the educatio...
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While collaborations between polytechnics and industry existed and were well pronounced in the earlier revolutions where apprenticeship training was key to driving industry, the relationship between industry and universities was not well pronounced. The transformations in the engineering education sector, especially from the third to the fourth Ind...
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Unlike during the earlier industrial transformations, tertiary institutions have adopted a new pedagogy of problem-based learning (PBL) in which practical industry problems are used as case studies in lectures to quicken the students’ understanding of industrial operations. Industry-based learning (IBL) involves the professional placement of underg...
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The provision of solutions for industry in terms of modelling and simulations, ultimately leading to optimisation of manufacturing, mining or other engineering processes, is usually the preserve of production and process engineers. However, the shortage of such professionals often force companies to engage foreign expertise, which is usually quite...
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Collaborations among tertiary institutions for research and other related activities have never been more important, particularly in this era of dynamic and rapid changes in technology. Performance of institutions have also become topical as more ranking organisations have been created to assess the integrity and competitiveness of tertiary institu...
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Despite rapid and dynamic changes in technology and the disruptive but necessary innovations orchestrated by the fourth Industrial Revolution that required the production of goods and services in industry to be driven by technology and knowledge transfer from tertiary institutions, the gap between academia and industry remained wide. This has been...
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There are several underlying factors that are sometimes ignored while diagnosing companies with low capacity utilisation such as sustainability strategies for continuity and holistic approaches to engineering change management in this era of dynamism in technology. This chapter focusses on establishing the failures that contributed to low capacity...
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The research on bridging the gap between academia and industry in Southern Africa in collaboration with UK institutions was executed during the decade spanning from 2010 to 2020, a period in which many challenges such as the aftermath of the global financial crisis and the COVID-19 pandemic were witnessed. This was coupled with rapid changes in tec...
Article
Full-text available
Biogas from anaerobic digestion (AD) may contribute towards a green energy scene in the future. Despite many benefits, AD plant operators are still challenged by limitations of the technology. This study aimed at evaluating the effect of biochar addition to AD reactors operated at 45°C to optimize productivity, efficiency and stability of the proce...
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Agriculture diversity has become an important concept lately. It supports social, economic, and environmental improvement. It also ensures ecoefficiency within the agroindustrial sector and promotes sustainable values. This chapter focuses on ecoefficiency techniques, applying the stochastic frontier approach for environmental improvement activitie...
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The average amount of waste generated annually from agriculture and food processing amounts to 1.3 Gt globally. This is an obvious challenge that requires a timely strategy to mitigate the negative impacts on natural resources conservation. The motivation of this research is to examine the relationship, between the agrowaste management system, with...
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To improve sustainability through agrowaste diversity, the agricultural and food industry sectors need to reform their strategies and access to digitized operations management practices (eco-literacy). Already, several notable agricultural development companies have embraced digitization and knowledge transfer capabilities that can promote operatio...
Book
Full-text available
Several discussions on waste management and exploitation for productivity gains have led to the realization that very little information is available concerning the correlation between the most effective approaches and educational perspectives to achieve sustainable agro-waste diversity. Hence, it inspires the investigation into sustainable and cos...
Article
Nascent technological innovation is fast advancing, with a promise to reach the most primitive corners of the earth. Industry operations are also fast-changing. Thus, the introduction, and implementation of the different Industry 4.0 (4IR) technologies such as the cyber-physical systems (CSP), big data analytics, 3-D printing, and the Internet of T...
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The heterogeneous nature of emerging technologies viz internet connections has increased the propensities for information technology services to be available to humans, in a wide range of applications. The nascent development of digitization and proliferation of the Fourth Industrial Revolution (4IR) solution in manufacturing practices (e.g., Inter...
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Waste to energy is actualizable, especially with the new trend in research and development that has brought about a nascent improvement in the classification of energy crops. The concern for waste to energy has, therefore, become of vital interest to different private, public, and government stakeholders, leading to numerous funding programs primar...
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Agricultural waste diversity and sustainability issues have become a serious concern lately that have led to huge financial and environmental implications in developing countries and sub-Saharan Africa in perspective. The lack of proper waste management practices, following the lack of adequate information, and compliance with established protocols...
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The need to pursue waste recovery is multifaceted, relating to clean energy generation, management of unwanted and discarded items, emission control, and maximization of the use of land against uncontrolled dumping. The motivation of the study is within the purview of agricultural development economics and touching on the lackadaisical coordination...
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The world population growth rate directly influences the increase in food productivity and agricultural expansion within and outside the boundaries of a nation, and Africa is significantly affected by this narrative. The need to assimilate the potential of the various waste management processes and optimization for value creation, replacing signifi...
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The development of renewables and alternative technologies to ensure eco-friendly measures and meet the production of natural gas shows considerable growth potential for the electrification of modern cities and isolated or rural communities. Biofuels are achieved from oil-based producing crops and other biodegradable agricultural residues and bioma...
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This timely research examines the interlink between sustainability and the ideals for economic progress amid the risk and uncertainty that threatens the advancement of agriculture diversity in Africa. Inferences to decision-making parameters based on the availability of new technologies and the implementation of Sustainable Development Goals (SDGs)...
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Sustainable innovations and strategies for natural resource utilization, without causing any significant damage to the ecological balance, promoting water, land, and forest conservation are vital subjects to be addressed. To protect the ecosystem, there is a great need to adjust our current lifestyle and explore sustainable resources for biofuel pr...
Book
This book is the result of years of research following a realization of the mismatch of engineering skills produced by universities and those that industry required, based on the situation in Sub-Saharan Africa, equally applicable to other regions in Africa and indeed worldwide. The book is meant to assist engineering academics and engineers in ind...
Article
Full-text available
Computerised software systems have undeniably continued to gain recognition in the implementation of reliable maintenance policies in today's Industries. While significant investigations corroborating the importance of management technology in developed economies abound, this study examines the level of the technology's success in a typical manufac...
Conference Paper
The urgency to transform consumption and production patterns, while combining modern strategies and techniques for long term resolve calls for more focus. "Green" terminology has been propagated in different fields of study, and continues to be the motivation for efficiency and innovation in manufacturing operations, to address the major societal,...
Conference Paper
The gathering of one hundred and ninety four delegates in Japan (2010) to endorse the 2020 strategic plan for biodiversity, and the 20 Aichi conservation targets that allay the 2030 Sustainable Development Goals (SDG), draws attention to what is achievable in 10 years. This exploratory research reviews sustainable practices and discusses different...
Conference Paper
Full-text available
Recent healthcare literature has upheld lean as a methodology for improving operational efficiency and quality of care. However, the uncertainty of implementing lean successfully is still of concern as implementation failures have been recorded. Insufficient preparedness and lack of readiness assessment among other factors have been highlighted as...
Conference Paper
Full-text available
The basic principles and definition of cooperative is very important in differentiating a cooperative from other business ventures so that cooperative members and all stakeholders fully understands the rights, responsibilities and the expectations of all parties involved. For a cooperative to be successful and serve its purpose members need to have...
Article
Full-text available
The time series dataset presented here was captured using a real-time energy monitoring device from a three-phase distribution board panel of a student residence. We captured the data from April 2016 to January 2018 in Johannesburg, South Africa. The data from each phase was automatically aggregated and presented as a single data point. The granula...
Conference Paper
Harare is experiencing enormous solid waste management challenges manifesting themselves in the form of both groundwater and surface water pollution leading to outbreak of water born diseases. The solid waste management infrastrucre in Harare was designed to cater for almost a third of the population it is currently serving. Heaps of illegally dump...
Conference Paper
The decentralisation of municipal solid waste management (MSWM) brings significant reductions in the amount of waste sent to landfills, distances travelled by waste collection vehicles yielding subsequent reductions in fuel consumption, transport and maintenance costs, greenhouse gas and other emissions as well as vector associated human health imp...
Conference Paper
This study assessed the suitability of incorporating waste transfer stations in six developed future municipal solid waste (MSW) management options for urban environments within and surrounding Harare city. MSW collection and transportation is a major challenge characterising the management of MSW being generated, currently consuming over 70% of th...
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This paper was a research done at a local university in Zimbabwe. Dishwashing by hand involves scrubbing, rinsing and drying of dishes which is time consuming and laborious when done on a large scale. Each dining hall at the university uses about one thousand plates per meal and the university is understaffed thus the dishes are not thoroughly clea...
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This paper is about designing a bicycle frame which is portable as well as sustainable for the nation of Zimbabwe. It is aimed at taking advantage of the properties offered by bamboo in the context of a bicycle frame e.g. ability to absorb vibrations when riding the bicycle on a rough terrain. Aspects of stiffness and ride quality are discussed in...
Article
Full-text available
One of the main power stations in Zimbabwe has its generators located 100m underground. Elevators that used to carry people to the underground plant are not functional anymore due to old age and corrosion of the hoist way blade and guide rails. A system with an electromagnet actuator attached to the elevator car and its core shaped in the form of t...
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Full-text available
An economic-based sustainable cost-benefit evaluation of Aluminum roofing sheet (ARS) manufacturing in Nigeria is presented. The aim is to evaluate costs and profits associated with various plant sizes within sustainability concerns, in order to promote economic growth. The metrics for economic viability analysis, namely; total capital investment,...
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Full-text available
Wall plastering is a laborious and often time-consuming process for the construction industry. Mortar spraying is the rendering of mortar at high velocity to achieve compaction and placement at the same time. This research aimed at conceptualizing various options, leading to the development, design and fabrication of a semi-automated machine to red...
Conference Paper
The industrial operation, as we know, is transitioning. Newly emerging innovations and digitization techniques now play a vital role in transforming manufacturing activities beyond the natural materials selection requirement, energy savings, and waste reduction. Here, we explore new concepts and review technological drivers, including big data, Cyb...
Conference Paper
The dawn of the fourth industrial revolution motivates the unveiling of new business models and technological selections, to enable enterprises to operate efficiently. The vision of digitization and intelligent or smart technique to organize future industrial operations is a compelling issue to address. Deployment of the Internet of Things (IoT) co...
Article
Full-text available
Composting and anaerobic digestion (AD) of biodegradable waste were assessed for their benefits from literature and environmental impacts using the life cycle impact assessment procedure. Literature review findings indicate an overall edge for AD over composting largely due to its renewable energy production capabilities, reduced exhaust emissions...
Conference Paper
Full-text available
South Africa is considered as one of the ten largest coal producers and the fourth largest coal exporting country in the world. The above claim perfectly confirms the importance of the coal mining industry to the country economy. With increasing dependency of the country on coal resource for power generation, all indications show that coal explorat...
Conference Paper
Full-text available
Business processes are closely associated with improvements in increased productivity and profitability. Keeping the "content" the same but changing the strategy has often been the approach of many service industries towards strategy implementation. However, non-compliance of employees to an organization's business process towards implementation of...
Conference Paper
Full-text available
Concentrated solar power (CSP) is a prominent technology system, mainly to harness solar energy for producing electricity. The CSP systems are highly dependent on the efficient reflector and receiver designs, working medium, and thermal storage technologies to produce intermittent electrical power with several options like the hybrid, peak load, co...
Conference Paper
Full-text available
The paper briefly considers the most recent literature on solar photovoltaic grid parity with inference to the market price phenomenon for costs and future success of the technology proliferation. The resolution to populate the energy sector with green energy initiatives, and the preparedness to invest in the sustainable pathways to mitigate the il...
Conference Paper
Full-text available
Sustainable value chains are a drive towards minimising non-renewable resource consumption. Globally, the goal is to achieve sustainability in resource consumption from the point of production to the end-of-life (EoL) of the product. To achieve sustainability in the recovery chains of wastes, a number of aspects contribute. Waste collection systems...
Conference Paper
Full-text available
Packaging Wastes (PWs) management is a global environmental challenge especially in cities of developing economies. Globally, it is a growing and critical waste stream. In order to achieve sustainable recovery rates in this waste stream, strategies such as source separation schemes should be adopted with the consideration of other techniques. In de...
Conference Paper
Full-text available
A number of stakeholders are involved in managing Solid Waste (SW) and the role of each stakeholder in Waste Management (WM) is important. However, achievement of Education for Sustainable Developments (ESD) requires imparting knowledge on WM issues to the stakeholders. In developing economies of Southern Africa, a number of goals for sustainable d...
Article
Full-text available
Recently, scientific research and development focus on nascent technology to solve the global energy crises, and results in innovative approaches for resource exploitation and sustainable disposition to improve energy generation and utilization. Hence, support better socioeconomic performance and environmental management. In spite that, we are appr...