scholarly journals Estimation of Leachate Generated from Zimbabwe’s Municipal Solid Wastes (MSW) Landfills using a Simple Stochastic Water Balance Model

2018 ◽  
pp. 40-50
Author(s):  
Andile B. Maqhuzu ◽  
Kunio Yoshikawa ◽  
Fumitake Takahashi

Landfilling remains the predominant component in the waste management hierarchy of most developing nations. The adoption of emerging waste management technologies and the use of recycling or composting is still in its infancy. Among several inadequacies of current waste management practices in Zimbabwe is the absence of sanitary disposal of municipal solid waste (MSW) in landfills. As a result, the leachate generation rate and leachate characteristics are not routinely monitored. Such information is essential when assessing the impact of leachate on ground and surface water or a facility to which the leachate can be conveyed. Indiscriminate disposal of MSW at unsanitary dumpsites poses a double threat as the discharge of hazardous leachate to potable water sources and emissionsof toxic odours leads to further environmental degradation. Poor waste management practices are compounded by a lack of financial resources and technical capabilities. The financial incapacitation of local authorities is reflected in the fact that there are no reliable statistics on MSW generation and disposal. This lack of comprehensive data has hampered the quantification of MSW and resultant leachate. Therefore, the objectives of this study are twofold. First, we seek to predict the annual quantity of landfilled MSW, and secondly to quantify the leachate flow from Zimbabwe’s landfills. Both were achieved through the use of probability models and a stochastic water balance method supported by 10,000 Monte Carlo iterations. The calculated 90%confidence interval indicates that 13-16 million tonsof MSW havebeen landfilled, with about 41-128 million m3of leachate released since 1980. This is equivalent to a mean of 414,212tons a-1of landfilled MSW and 2.2 millionm3a-1of leachate generated, respectively.

2020 ◽  
Author(s):  
Rejani Nair

<p><i>Food waste and its accumulation are becoming a critical problem. </i><i>In this context, this paper takes a look at the general view with the aim of achieving a better understanding of the different types of food waste, and tries to ponder on</i><i> the required steps or standard management practices should be taken to reduce the impact of food waste burden. The study has tried to analyse the waste management practices, cost of waste management practices etc. in small scale food processing units.</i><i></i></p>


2018 ◽  
Vol 20 (1) ◽  
pp. 83-87 ◽  

One of the most important environmental problems is municipal solid waste management (MSWM) as a result of the rapid rise in waste generation due to industrialization, economic development, urbanization, and rapid population growth in Turkey. The collection, transportation, and disposal of solid waste are conducted by municipal authorities of Turkey. The waste management problem is getting more serious due to some reasons such as lack of enforcement of regulations, weak technical and financial resources, poor infrastructure, insufficient policies and deficiency of political priorities, poor coordination between authorities. Hence, despite the legislation, municipal solid wastes are managed in an unscientific manner by the municipalities. The SWOT analysis is a perfect tool to discover the possibilities and ways for successfully implementing the MSWM. In this study, SWOT analysis carried out both negative and positive concerns of MSWM. A successful strategic management has been identified from the SWOT analysis for the municipal solid wastes. Further, the study proposes options based on SWOT analysis approach to improve in available waste management practices that could also be adopted by other countries to decrease the adverse effect of MSW on human and environment health.


Recycling ◽  
2020 ◽  
Vol 5 (2) ◽  
pp. 8 ◽  
Author(s):  
David O. Olukanni ◽  
Favour B. Pius-Imue ◽  
Sunday O. Joseph

The effects of poor solid waste management practices in many developing countries have been identified in the literature. This study focuses on understanding the public perception and attitudes of people towards local waste management practices. Five Local Government Areas in Ogun State, Nigeria, were selected based on population, landmass, spatial location, and distribution. The study used a survey that looked into the socio-demographics, household characteristics, and standard solid waste disposal practices at the household and municipal levels. Factors such as frequency of waste collection, presence of environmental task force/protection agency, and level of effectiveness of such task force/agency were all investigated. The study verified the impact of people’s attitudes towards waste management, as well as the effects of monitoring and control on the management of waste. The results showed that significant factors such as age, income, and education levels affect the perceptions, practices, and attitudes of the people towards solid waste management. An average of 36.6% of the people in the selected local governments dispose of their solid wastes at open dumps, with the majority of the residents (54.4%) still with the opinion that sanitation services are too costly and should be the prerogative of the local and state governments to carry out. These outcomes resonate that more efforts by the government and relevant stakeholders should be put into proper enforcement of environmental laws, as well as creating awareness on proper solid waste management practices in schools and public places.


2018 ◽  
Author(s):  
◽  
Innocent Dalumzi Njiva

In this democratic era, two of the largest previously disadvantaged communities in Port St Johns i.e. Mtumbane and Maheng were still without waste collection services. Solid waste was dumped indiscriminately and posed risks to health and the environment. To help these communities to achieve better health, this study aimed to investigate the effectiveness of environmental education on waste management practices (WMP). The key objectives entailed establishing the knowledge, attitude and behaviour of sampled households towards WMP; evaluating the intervention of the 4Rs (reuse, reduce, recycle and recover) of WMP as taught to Grades 4 to 7 residing in the previously sampled households and assessing the impact of the intervention on WMP in these households. This study was undertaken in three phases. The pre-intervention and post-intervention phases included questionnaire administration occurring over two months. The intervention comprised the teaching of the 4Rs of WMP and the completion of a daily diary by Grades 4 to 7 residing in the previously sampled households.This study focused on statistically significant differences that were reported between pre- and post- intervention. The differences were meant to establish if the respondents had any changes in knowledge regarding solid waste management. Results showed that the use of plastic bags increased which showed a significant difference (p-value 0.034).Indiscriminate dumping of waste in Mtumbane decreased whereas in Maheng, there was no difference with their practices. Among the majority of respondents from Mtumbane, waste was regarded as something useful (p-value 0.003). The education associated with waste management for both townships increased by more than 15% and that made a significant difference (p-value 0.025). Further, more than half of the respondents in Mtumbane separated their waste. The results show that there was a significant difference (p-value 0.001) in Mtumbane and not in Maheng. This significant difference may be attributed to the distribution of adequate information as the two townships vary in distance from the municipal offices i.e. Mtumbane: three kilometres and Maheng: 15 km). It was found that the number of respondents willing to pay for waste collection services increased post-intervention (p-value 0.003). It appears that in every aspect when pre- and post-intervention were reported, there was a positive difference after the intervention phase. Four recommendations are proposed: (1) organising solid waste cleaning campaigns and environmental education in schools and communities; (2) the introduction of the 4Rs to communities; (3) the provision of communal waste skips and (4) the use of incentives to foster proper waste disposal practices. It is important for all future studies to consider a method for disseminating important information to the community in order that waste management strategies can be fully and successfully implemented.


2021 ◽  
Vol 8 (SI-1) ◽  
pp. 199-214
Author(s):  
Devendra Kumar Dhusia ◽  
Pankaj Kumar Gupta ◽  
Neena Mital ◽  
Renu Jain

With the technological advancement and changes in the working and lifestyles of people and industry, the rate of obsolesce of electrical and electronic equipment and gadgets, particularly computers and mobile phones, is high, posing a threat to health and environment creating a threat to sustainability for nations around the globe. Realizing the difficulties of e-waste management, many developed countries have started dumping the e-waste to developing nations that suffer from resources constraints, thus leading to hazardous activities mainly in the informal sector. Therefore, we are motivated to examine whether the awareness of the environment, attitudes, and beliefs, particularly knowledge (constructs), impact practices relating to management of e-waste in India. Analysis of the results of our survey of 180 respondents through SEM model show an insignificant association of these constructs with e-waste management practices. However, we find a significant mediating role of Environmental Knowledge in all these relationships.


This chapter reports the effective wastes management strategies. To achieve this aim, the waste management practices of 14 airlines from four regions were investigated. The data used in this chapter was a secondary published data in the annual sustainability reports. The data was retrieved from GRI (Global Reporting Initiatives) website. The special tailored data analysis techniques were used for this purpose. The chapter reported four on-board and ground strategy patterns and three hybrid patterns. Hybrid strategy patterns were better ranked than the most of on-board and ground strategy patterns. This chapter helps the decision makers and the academics alike, since the impact of each action under each action category of each pattern on wastes reduction was reported.


2001 ◽  
Vol 1 (1) ◽  
pp. 77-98 ◽  
Author(s):  
Kate O'Neill

This article examines the impact of global and economic pressures on hazardous waste management practices during the 1980s and 1990s and into the twenty-first century. It charts out four sets of recent changes in these practices. These are: first, a shift in the basic regulatory problem, from one of a more local nature to the internationalization of waste management issues; second, changes in the structure of the waste disposal industry worldwide; third, changes in policies regarding hazardous waste in EU member states; and fourth, changes in waste management policies in emerging economies. The article analyzes these changes in the light of the growing involvement of the private sector in international environmental regulation, and of the complex and sometimes contradictory impacts of international regulations on domestic politics. It argues that neither a “race to the bottom” nor a “race to the top” hypothesis fully holds, but that changing public/private and domestic/international balances are a mixed blessing.


2015 ◽  
Vol 3 (5) ◽  
pp. 109-114
Author(s):  
Alfred D. Mshelia

The study assessed hair barbing salon Waste Management Practices in Bama. A set of questionnaire was administered to barbing salon proprietors to obtain their current barbing salon waste management styles, viz a viz the types of waste generated and methods of waste disposal. Data obtained were analyzed descriptively and reveals hair as the dominant waste generated in barbing salon operations. The hair wastes are swept and packed using coconut brooms and plastic hand shovel and stored in paper cartons. They are hence disposed on weekly or monthly basis or whenever cartons are filled up at refuse disposal points along streets within the neigbourhood, outskirt of the town, a large trench left behind by Cubits Civil Engineering Construction Company and the Yedseram river valley or at best burnt or buried. The adoption of these disposal techniques is more or less the same technique used in the disposal of all forms of refuse in the study area where wastes are disposed with impunity. In the same vein, there is a significant level of awareness of the impact of salon waste management practices on the environment/society by perpetrators. The study recommended steps for better barbing salon waste management to include salon waste reuse and recycling by researching into how barbing salon wastes can be a resource.


2016 ◽  
Vol 4 (3) ◽  
pp. 1-9 ◽  
Author(s):  
Jacob Mayowa Owoyemi ◽  
Habeeb Olawale Zakariya ◽  
Isa Olalekan Elegbede

Abstract Wood industries produce large volumes of residues which must be utilized, marketed or properly disposed of. Heaps of wood residues are common features in wood industries throughout the year. In Nigeria, this residue is generally regarded as waste and this has led to open burning practices, dumping in water bodies or dumping in an open area which constitutes environmental pollution. Sawmills in Nigeria generated over 1,000,000 m3 of wood waste in 2010 while about 5000 m3 of waste was generated in plywood mills. Nigeria generates about 1.8 million tons of sawdust annually and 5.2 million tons of wood wastes. The impact of improper disposal of waste wood on the environment affects both the aquatic and terrestrial ecosystems. Also burning of waste wood releases greenhouse gases into the atmosphere causing various health issues. Reuse/recycling of these wood residues in Nigeria will reduce the pressure on our ever decreasing forests, reduce environmental pollution, create wealth and employment. The literature available on this subject was reviewed and this article, therefore, focuses on the various methods of wood waste disposal and its utilization in Nigerian wood industries, the effects of wood waste on the environment as well as on human health and the benefits of proper wood waste management practices.


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