Civil Engineering

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Civil Engineering

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Author: search.filters.author.Asogwa E.OSubject: search.filters.subject.Solid waste

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    ASSESSMENT OF PHYSICO-CHEMICAL CHARACTERISTICS OF LEACHATE CONTAMINATED LATERITIC SOIL
    (Nigerian Journal of Engineering Science and Technology Research, 2023-04-29) Asogwa E.O; Sabo B; Agbonselobho M.O; Agbese E.O; Haruna S.I; Mangey J.A
    This research studied the physico-chemical characteristics of leachate contaminated soil. Leachate is known as an important source of environmental pollution, more especially groundwater, pollution due to the presence of organic and inorganic substances, including heavy metals. Leachate is a major problem for municipal solid waste landfills and causes significant threat to surface water and groundwater. Leachate is generated by excess rainwater passing through the waste body. The pollutants from the waste material are transferred to the percolating water by the combination of physical, chemical and microbial processes. Leachate is characterized as water-based solution of four groups of pollutants; dissolved organic matter, heavy metals, inorganic macro components, and xenobiotic organic compounds. The physio and bio-chemical analysis: BOD, COD, pH, EC, total hardness, nitrite, chloride, calcium and heavy metals such as Pb, Fe, Zn, and Cu were determined. From the results obtained, pH increases with increase in percentage contamination, from pH of 5 at 0% contamination to 5.62 at 100% contamination and cation exchange capacity also increased from an initial value of 187.613mg/lat 0% to 200.575mg/l at 100% contamination. These results show that the dumpsite has slight effects on the adjacent stream and underlying soil. Therefore, the implementation of a properly designed leachate collection system to prevent future risk of continuous contamination of the underlying soil and groundwater is important.
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    Evaluating Haul Container System of Solid Waste Collection in Enugu Municipal
    (Journal of Mechanical and Civil Engineering (IOSR-JMCE), 2022-02-28) Asogwa E.O; Saidu M; Adesiji A.R; Asogwa E.U; Mangey J.A; Muhammad S.J
    Over the years, studies have shown that rapid population growth and the growth of urban centers result in the substantial increase in the amount of wastes generated hence the demand for a sustainable collection system.This research aims at evaluating haul container system of waste collection in Enugu Municipal which comprises 10 zones with the view of determining the zone with higher efficiency and better cost. The data for the research was obtained through the ten zone collection crews, questionnaires (through random sampling) and oral interview. The result indicates that there is problem of unregulated waste dumping, as a result of ineffective waste collection and inadequate number of waste bins in the said zones. The weekly operational cost of the haul system in the zones as obtained from the analysis carried out are N72,000, N71, 000, N66, 000, 62,000, N60, 000, N59,000 and N58, 000 for Emene, ( New Haven and Agbani Road), ( Independent layout and Coal Camp), GRA, (Trans-Ekulu and Ogui) Achara-Layou t andAbakpa respectively and the efficiency of the collection crew in the zones are also 88% , 83%, 78%, 73% and 68% for Abakpa, Achara- Layout , (Trans-Ekulu, GRA and Ogui Road), ( Independent layout and Coal Camp) and ( Agbani Road, New Haven and Emene) respectively. Therefore the haul container system of waste collection can be improved by provision of the required basic infrastructural amenities by Government through the waste management agency (ESWAMA).