Recycling of sludge ash of wastewater treatment plants in cementitious materials; effect of rheo-mechanical characteristics

D. Djafari, B. Safi, R. Zentar


Abstract: The present study is a contribution to the valorization of even the elimination of sludge storage in wastewater treatment plants (WWTPs). Indeed, after the calcination of sludge, ash obtained is incorporated into cement, for the production of ecological cements,
or eco-cements.

This approach constitutes a durable solution and unquestionable safeguarding of our ecosystem of any nuisance which can endanger
the balance of our environment. The eco-cement is developed by substitution of different amount of ash (5%, 10% and 15%) obtained into the clinker. The workability of different cement paste of eco-cements developed can be characterized by the evaluation of yield shear stress
 by using mini slump cone. Mortar samples were tested to observe the evolution of the mechanical compressive strength was according to time (for 2, 7 and 28 days). The results obtained showed a remarkable increase in yield shear stress of cement paste and an improvement in the strength of mortar in the cured state.

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Seyssiecq, I. State-of-the-art: rheological characterisation of wastewater treatment sludge. Biochemical Engineering Journal. 16 (2003) 41–56.

Korichi, Y.; Gabouss, A.; Si Lakhel, k. La PME en Algérie: Etat des lieux, contraintes et perspectives, Algerian Business Performance

Review. 4 (2013) 48 - 49.

Lagha, H.; Bachi, A. Sustainable development in Algeria. Algerian Journal of Environmental Science and Technology. 4 (2018) 742 – 749.

Yuansong, W. Minimization of excess sludge production for biological wastewater treatment. Water Research. 37 (2003) 4453 – 4467.

Deborah, P.; Silvia, F.; Giuseppe, G.; Marco, A. Thermal valorization of sewer sludge: Perspectives for large wastewater treatment plants. Journal of Cleaner Production 137 (2016) 1323-1329.

Cusido, J. A.; Soriano, C. Valorisation of pellets from municipal WWTP sludge in Lightweight clay ceramics. Waste Management. 31 N°6 (2011) 1372-1380.

Chiou, I.J.; Wang, K.S.; Chen, C.H.; Lin, Y.T. Lightweight aggregate made from sewage sludge and incinerated ash. Waste Management. 26 (2006) 1453-1461.

Kaosol, T. Reuse water treatment sludge for hollow concrete block manufacture. Energy Reports Journal 2 (2010) 131-134.

Montero, M.A.; Jordán, M.M.; Hernández-Crespo, M.S.; Sanfeliu, T. The use of sewage sludge and marble residues in the manufacture of ceramic tile bodies. Applied Clay Science. 46 (2009) 404-408.

Yang, K-H.; Jung. Y-B.; Cho, M-S.; Tae, S-H. Effect of supplementary cementitious materials on reduction of CO2 emissions from concrete. Journal of Cleaner Production. 103 (2015) 774-783

Zhao, H.; Sun, W.; Wu, X.; Gao, B. The properties of the self-compacting concrete with fly ash and ground granulated blast furnace slag mineral admixtures. Journal of Cleaner Production. 95 (2015) 66-74.

Bostanci, S.C.; Limbachiva, M.; Kew, H. Portland slag and composites cement concretes: engineering and durability properties. Journal of Cleaner Production 112 (2016) 542-552.

Vargas, J.; Halog, A. Effective carbon emission reductions from using upgraded fly ash in the cement industry. Journal of Cleaner Production. 103 (2015) 948-959.

Aprianti, S. A huge number of artificial waste material can be supplementary cementitious material (SCM) for concrete production-a review part {II}. Journal of Cleaner Production. 142 (2017) 4178 – 4194.

Hemalatha, T.; Mapa, M.; George, N.; Sasmal, S.; Physico-chemical and mechanical characterization of high volume fly ash incorporated and engineered cement system towards developing greener cement. Journal of Cleaner Production. 125 (2016) 268-281.

Roussel, N.; Coussot, P. Ecoulement d’affaissement et d’étalement : modèlisation, analyse et limites pratiques. Journal of European Journal of Environmental and Civil Engineering. 10 (2006) 25 – 44.

Benoudjit, F.; Hachemi, M. Evaluation of trace metals in sewage sludge from a wastewater treatment plant with perspective of valorisation. Algerian Journal of Environmental Science and Technology. 1 (2015) 48 – 52.

Wallevik, JE. Relationship between the Bingham parameters and slump. Cement and Concrete Research. 36 (2006) 1214–1221.

Pevere, A.; Guibaud, G.; Goin, E.; Van Hullebusch, E.; Lens, P. Effects of Physical and Chemical Evolution factoring on the viscosity of anaerobic granular sludge. Biochemical Engineering Journal. 43 (2009) 231-238.


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