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sur le développement des zones arides et semi-arides

Titre : Characterization of Landfills Solid Waste and Sewage Sludge in Muscat and Estimation of their Energy Recovery

Auteur : Omaima Khalaf Naseer Al Samsami

Université de soutenance : Sultan Qaboos University

Grade : Master of Science (MS) 2021

Résumé partiel
Solid waste management is one of the most crucial issues facing the Sultanate of Oman. Disposal of municipal solid waste (MSW) in engineered landfills without any pretreatment or separation is the only available option. Engineered landfills themselves are still new and their waste characteristics have not been well studied. Wastewater treatment sludge (WWTS) is another type of solid waste that also needs to be addressed as the existing literature on its nature and characteristics is still limited in the country. A reliable database of the solid waste compositions, properties, and estimated energy content is significant and the first step for an efficient waste management system. Research in this field must be carried out on an ongoing basis to cover this data shortage and assure that the waste management process is going in the right direction. This is an essential demand irrespective of the complexity of the research in this field and the attendant logistic challenges. Added to this is the need to convert solid samples into liquid phase in most laboratory experiments and to separate samples manually due to the lack of the required equipment.

This study investigates the nature of the MSW from landfills and sewage sludge from wastewater treatment plants in Muscat Governorate. Muscat MSW samples were collected from Al Amerat and Barka landfills in 2020. MSW compositions were analyzed in terms of the materials percentages (food, plastics, papers… etc.), followed by studying the potential of recycling that waste. MSW physiochemical characteristics of both landfills were studied. Regarding WWTS samples, they were collected from Al Ansab and Al Seeb wastewater treatment plants which are the main plants in Muscat. The samples were collected from each plant during 2020. WWTS physiochemical characteristics have been studied. Estimated energy recovery of both MSW and sewage sludge has been also calculated.

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