450,518 research outputs found

    Environment, Health and Wealth: Towards an Analysis of Municipal Solid Waste Management in Ota, Ogun State, Nigeria

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    The management of municipal solid waste is one of the challenges facing the developing countries because governments, institutions, and private sectors have given solid waste management low priority and ignoring the implication it has on the general public. This is characterized by inefficient collection methods, insufficient coverage of the collection system and improper disposal. This paper presents the current solid waste management method adopted in Ado-Odo Ota local government and its associated challenges. Four locations (Iganmode area, Joju area, Ota market and toll gate area) were selected. These sites are points where the waste bins are located. A field work that involves the characterization and types of the waste generated, and frequency of collection from each site was carried out. A representative sample of 280 kg was used for the waste characterization and the result shows that about 64% of the wastes are recyclable with lots of organic waste that comprises of food and agricultural waste which can be used as compost. The only dump site in Ota was visited in order to obtain useful information concerning the present state of solid waste management. The study revealed that there is presently no investment made to the existing development plan to introduce a modern waste management system. The study suggests new approach that could be used by institutions and government agencies for municipal solid waste management to achieve sustainable and effective sanitation

    Do a follow-up lunchroom waste characterization (post waste-free lunch day or policy implementation)

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    The baseline waste characterization helped you identify and quantify waste streams in your facility. The initial waste characterization enabled you to create a tailored strategy for your facility to reduce food waste. A follow-up waste characterization provides an objective tool to measure progress as you implement your strategy.Funded by U.S. Environmental Protection Agency Region 5Ope

    Fast pyrolysis of halogenated plastics recovered from waste computers

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    The disposal of waste computers is an issue that is gaining increasing interest around the world. In this paper, results from the fast pyrolysis in a fluidized bed reactor of three different waste computer monitor casings composed of mainly acrylonitrile-butadiene-styrene (ABS) copolymer and two different waste computer body casings composed of mostly poly(vinyl chloride) (PVC) type polymers are presented. Preliminary characterization of the waste plastics was investigated using coupled thermogravimetric analysis-Fourier transform infrared spectrometry (TGA-FT-IR). The results showed that the plastics decomposed in two stages. For the ABS-containing monitor casings, aromatic and aliphatic material were released in the first and second stages. The PVC-containing computer body casing samples showed a first-stage evolution of HCl and a second stage evolution of aromatic and aliphatic material and further HCl. In addition, each of the five plastics was fast-pyrolyzed in a laboratory-scale fluidized bed reactor at 500 °C. The fluidized bed pyrolysis led to the conversion of most of the plastics to pyrolysis oil, although the two PVC computer body cases produced large quantities of HCl. The pyrolysis oils were characterized by GC-MS and it was found that they were chemically very heterogeneous and contained a wide range of aliphatic, aromatic, halogenated, oxygenated, and nitrogenated compounds

    Analysis of nuclear waste disposal in space, phase 3. Volume 1: Executive summary of technical report

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    The objectives, approach, assumptions, and limitations of a study of nuclear waste disposal in space are discussed with emphasis on the following: (1) payload characterization; (2) safety assessment; (3) health effects assessment; (4) long-term risk assessment; and (5) program planning support to NASA and DOE. Conclusions are presented for each task

    Extensive reuse of soda-lime waste glass in fly ash-based geopolymers

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    The possibility of extensive incorporation of soda-lime waste glass in the synthesis of fly ash-based geopolymers was investigated. Using waste glass as silica supplier avoids the use of water glass solution as chemical activator. The influence of the addition of waste glass on the microstructure and strength of fly ash-based geopolymers was studied through microstructural and mechanical characterization. Leaching analyses were also carried out. The samples were developed changing the SiO2/Al2O3 molar ratio and the molarity of the sodium hydroxide solution used as alkaline activator. The results suggest that increasing the amount of waste glass as well as increasing the molarity of the solution lead to the formation of zeolite crystalline phases and an improvement of the mechanical strength. Leaching results confirmed that the new geopolymers have the capability to immobilize heavy metal ions

    Up-Cycling Plastic Bags Waste Into Lifestyle Products by Direct Heating Method

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    Today plastic waste is one of the largest waste contributors in the world, with approximately 10 percent of the total waste in the world. Most of the plastic waste comes from households, it is plastic bag waste. Already many efforts have been made to reduce the amount of waste and its effects. One of them is the up-cycling method. Up-cycling is a method of reusing waste into products that have more values or new use . Using this method, besides being able to reduce the amount of plastic waste that exists while creating new products with new selling values and functions. The results of this method produce lot of variation of fashion products, furniture, household appliances, etc. The up-cycling method that will be used is the direct heating method of plastic bag waste . This process will change the structure and characterization of plastic waste material. The next process is forming the material with the simple pressing machine into shape of product. The results of plastic bag waste treatment in this study are trendy color ring products. In the future, further development and refinement is still needed in the next research which focuses on finishing techniques and product range variations. Keywords : plastic waste, direct heating, lifestyle product

    Baseline Waste Stream Characterization Study

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    Since 2010, the University has taken several major steps toward achieving zero waste. In 2013, the University engaged the Illinois Sustainable Technology Center to conduct a campus-wide waste characterization study to better understand priorities and opportunities for waste reduction. The Illinois Sustainable Technology Center (ISTC), a unit of the Prairie Research Institute at the University of Illinois, created a methodology for waste stream characterization and evaluation that provides building-level performance measures and achievable recommendations for improvement. This report presents user survey results and recommendations for improvements based on waste characterization studies conducted at the Alice Campbell Alumni Center, Henry Administration Building, Swanlund Administration Building, and Illini Union Bookstore.Ope

    Coastal Zone Color Scanner studies

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    Activities over the past year have included cooperative work with a summer faculty fellow using the Coastal Zone Color Scanner (CZCS) imagery to study the effects of gradients in trophic resources on coral reefs in the Caribbean. Other research included characterization of ocean radiances specific to an acid-waste plume. Other activities include involvement in the quality control of imagery produced in the processing of the global CZCS data set, the collection of various other data global sets, and the subsequent data comparison and analysis

    Appraisal of Municipal Solid Waste Management, Its Effect and Resource Potential in A Semi-Urban City: a Case Study

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    Managing municipal solid wastes (MSW) is progressively becoming a major challenge in many cities of developing nations because of rapid urbanization and rise in population. This can be described by ineffective collection methods, inadequate coverage of the collection, processing system and inappropriate disposal. This paper presents the current state of solid waste management in a semi-urban city, its associated challenges and prospects that are within. A field work that involves the characterization and types of the waste generated, and frequency of collection was carried out within the study area. Four locations where the major waste bins are located within the city were considered. A representative sample of 280 kg was used for the waste characterization, and the results show that about 64% of the wastes are recyclable with lots of organic waste that can be used as compost. The only dump site in the city was visited in order to obtain useful information concerning the present state of solid waste management. The study revealed that there is presently no investment made to the existing development plan to introduce a modern waste management system. The study suggests new approach that could be used by institutions and government agencies for MSW management to realize a sustainable and efficient sanitation, and possible resources generation potentials that could be harnessed from the waste stream
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