Recovery of Sewage Sludge in the Cement Industry

Carmen Otilia Rusănescu, Gheorghe Voicu, Gigel Paraschiv, Mihaela Begea, Larisa Purdea, Ivona Camelia Petre and Elena Valentina Stoian
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Carmen Otilia Rusănescu: Department of Biotechnical Systems, Polytehnic University of Bucharest, 060042 Bucharest, Romania
Gheorghe Voicu: Department of Biotechnical Systems, Polytehnic University of Bucharest, 060042 Bucharest, Romania
Gigel Paraschiv: Department of Biotechnical Systems, Polytehnic University of Bucharest, 060042 Bucharest, Romania
Mihaela Begea: Department of Biotechnical Systems, Polytehnic University of Bucharest, 060042 Bucharest, Romania
Larisa Purdea: Department of Biotechnical Systems, Polytehnic University of Bucharest, 060042 Bucharest, Romania
Ivona Camelia Petre: Faculty of Materials Engineering and Mechanics, Valahia University of Targoviste, 13 Aleea Sinaia Street, 130004 Targoviste, Romania
Elena Valentina Stoian: Faculty of Materials Engineering and Mechanics, Valahia University of Targoviste, 13 Aleea Sinaia Street, 130004 Targoviste, Romania

Energies, 2022, vol. 15, issue 7, 1-10

Abstract: This paper presents an analysis of the literature that studies the possibility of sewage sludge being used in the cement industry to reduce carbon dioxide emissions from cement production and thus solve the problem of disposing of sewage sludge so that it is no longer stored, avoiding soil pollution with heavy metals, and reducing pressure on the environment. The ash of sewage sludge is a good pozzolanic material, because when it is finely ground, it can be used as a partial substitute for Portland cement. This reduces waste storage costs. Sewage sludge ash was mixed with cement, and it was analyzed to determine whether the paste obtained could be used as a raw material in the cement industry. The presented results are on the hydration characteristics of the sewage sludge ash, the compressive strength of the cement determined after different days, the workability of the cement, and the porosity of the cement paste and the ash.

Keywords: sewage sludge ash; circular economy; cement; waste (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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