LCA of heavy metals leaching from landfilled sewage sludge ash

    Domagoj Nakić Affiliation
    ; Dražen Vouk Affiliation
    ; Mario Šiljeg Affiliation
    ; Anđelina Bubalo Affiliation


Quantities of sewage sludge that are thermally treated (mostly incinerated) are increasing, resulting in growing quantities of sewage sludge ash (SSA) which also requires further management. Despite its potential as a resource, it is still largely landfilled. Considering the presence of potentially toxic and hazardous heavy metals in SSA, this paper analyzes how the change in the leaching concentrations of the selected heavy metals from landfilled SSA impacts the environment (air, water, and soil) by the means of LCA. When considering human toxicity potential as impact category, dominant impacts were due to emissions into the air, primarily caused by leaching of selenium and somewhat less cadmium, mercury and nickel. Mercury had a dominant impact when considering the terrestrial ecotoxicity potential impact. In the SSAs obtained from Croatian sludge, molybdenum leaching, along with selenium and mercury, showed a dominant impact. Therefore, due to the high variability of trace elements, detailed analysis of different SSAs is needed.

Keyword : heavy metals, landfills, LCA, leaching, sewage sludge ash

How to Cite
Nakić, D., Vouk, D., Šiljeg, M., & Bubalo, A. (2021). LCA of heavy metals leaching from landfilled sewage sludge ash. Journal of Environmental Engineering and Landscape Management, 29(3), 359-367.
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Oct 25, 2021
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Allegrini, E., Butera, S., Kosson, D. S., Van Zomeren, A., Van der Slot, H. A., & Astrup, T. F. (2015). Life cycle assessment and residue leaching: The importance of parameter, scenario and leaching data selection. Waste Management, 38, 474–485.

Areias, I. O. R., Vieira, C. M. F., Colorado, H. A., Dela­qua, G. C. G., Monteiro, S. N., & Azevedo, A. R. G. (2020). Could city sewage sludge be directly used into clay bricks for building construction? A comprehensive case study from Brazil. Journal of Building Engineer-ing, 31, 101374.

Chang, Z., Long G., Zhou, J. L., & Ma, C. (2020). Valorization of sewage sludge in the fabrication of construction and building materials: A review. Resources. Conservation and Recycling, 154, 104606.

Chen, C. H., Chiou, I. J, & Wang, K. S. (2006). Sintering effect on cement bonded sewage sludge ash. Cement Concrete and Composites, 28(1), 26–32.

Chen, M., & Lin, D. F. (2009). Stabilization treatment of soft subgrade soil by sewage sludge ash and cement. Journal of Hazardous Materi-als, 162(1), 321–327.

Chen, M., Blanc, D., Gautier, M., Mehu, J., & Gourdon, R. (2013). Environmental and technical assessments of potential utilization of sewage sludge ashes (SSAs) as secondary raw materials in construction. Waste Management, 33(5), 1268–1275.

Chen, Z., & Poon, C. C. (2017). Comparing the use of sewage sludge ash and glass powder in cement mortars. Environmental Technology, 38(11), 1390–1398.

Chen, Z., Li J. S., & Poon, C. S. (2018). Combined use of sewage sludge ash and recycled glass cullet for the production of concrete blocks. Journal of Cleaner Production, 171, 1447–1459.

Coutand, M., Cyr, M., & Clastres, P. (2006). Use of sewage sludge ash as mineral admixture in mortars. Construction Materials, 159(4), 153–162.

Cyr, M., Coutand, M., & Clastres, P. (2007). Technological and environmental behavior of sewage sludge ash (SSA) in cement-based materi-als. Cement and Concrete Research, 37(8), 1278–1289.

Cyr, M., Idir, R., & Escadeillas, G. (2012). Use of metakaolin to stabilize sewage sludge ash and municipal solid waste incineration fly ash in cement-based materials. Journal of Hazardous Materials, 243, 193–203.

Dhir, R. K., Ghataora, G. S., & Lynn, C. J. (2017). Sewage sludge ash characteristics. In Sustainable construction materials: Sewage sludge ash (1st ed., pp. 69–110). Woodhead Publishing.

Donatello, S., & Cheeseman, C. R. (2013). Recycling and recovery routes for incinerated sewage sludge ash (ISSA): A review. Waste Man-agement, 33(11), 2328–2340.

Donatello, S., Tyrer, M., & Cheeseman, C. R. (2010). EU landfill waste acceptance criteria and EU Hazardous Waste Directive compliance testing of incinerated sewage sludge ash. Waste Management, 30(1), 63–71.

Europäischen Wirtschaftsdienst. (2018). Die neue Klärschlammverordnung: Paradigmenwechsel für die Abwasserentsorgung (Report Klä-rschlamm). Euwid Wasser und Abwasser. EUWID.

Eurostat. (2019). Sewage sludge production and disposal.

Fischer, C., Lehner, M., & Mckinnon, D. L. (2012). Overview of the use of landfill taxes in Europe (Working Paper). European Topic Centre on Sustainable Consumption and Production.

Fontes, C. M. A., Barbosa, M. C., Toledo Filho, R. D., & Goncalves, J. P. (2004). Potentiality of sewage sludge ash as mineral additive in cement mortar and high performance concrete. In Proceedings of the Intern. RILEM Conference on the Use of Recycled Materials in Build-ings and Structures (pp. 797–806). Barcelona, Spain.

Fytili, D., & Zabaniotou, A. (2008). Utilization of sewage sludge in EU application of old and new methods – A review. Renewable and Sus-tainable Energy Reviews, 12(1), 116–140.

Gursel, A. P., Masanet, E., Horvath, A., & Stadel, A. (2014). Life-cycle inventory analysis of concrete production: A critical review. Cement and Concrete Composites, 51, 38–48.

He, B., & Wang, G. (2019). Is ceramsite the last straw for sewage sludge disposal: A review of sewage sludge disposal by producing ceramsite in China. Water Science & Technology, 80(1), 1–10.

Krüger, O., & Adam, C. (2015). Recovery potential of German sewage sludge ash. Waste Management, 45, 400–406.

Li, J. S., Xue, Q., Fang, L., & Poon, C. S. (2016). Characteristics and metal leachability of incinerated sewage sludge ash and air pollution control residues from Hong Kong evaluated by different methods. Waste Management, 64, 161–170.

Lin, D.-F., & Weng, C.-H. (2001). Use of sewage sludge ash as brick material. Journal of Environmental Engineering, 127(10), 922–927.

Lombardi, L., Nocita, C., Bettazzi, E., Fibbi, D., & Carnevale, E. (2017). Environmental comparison of alternative treatments for sewage sludge: An Italian case study. Waste Management, 69, 365–376.

Lynn, C. J., Dhir R. K., Ghataora G. S., & West R. P. (2015). Sewage sludge ash characteristics and potential for use in concrete. Construction and Building Materials, 98, 767–779.

Lynn, C. J., Dhir, R. K., & Ghataora, G. S. (2018). Environmental impacts of sewage sludge ash in construction: Leaching assessment. Re-sources, Conservation and Recycling, 136, 306–314.

Lundin, M., Olofsson, M., Pettersson, G. J., & Zetterlund, H. (2004). Environmental and economic assessment of sewage sludge handling options. Resources, Conservation and Recycling, 41(4), 255–278.

Mohajerani, A., Ukwatta, A., & Setunge, S. (2018). Fired-clay bricks incorporating biosolids: Comparative life-cycle assessment. Journal of Materials in Civil Engineering, 30(7), 1–12.

Nakić, D. (2018). Environmental evaluation of concrete with sewage sludge ash based on LCA. Sustainable Production and Consumption, 16, 193–201.

Nakić, D., Vouk, D., Donatello, S., & Anić-Vučinić, A. (2017). Environmental impact of sewage sludge ash assessed through leaching. Engi-neering Review, 37(2), 222–234.

Nakić, D., Vouk, D., Serdar, M., & Cheeseman, C. R. (2020). Use of MID-MIX® treated sewage sludge in cement mortars and concrete. European Journal of Environmental and Civil Engineering, 24(10), 1483–1498.

Oliva, M., Vargas, F., & Lopez, M. (2019). Designing the incineration process for improving the cementitious performance of sewage sludge ash in Portland and blended cement systems. Journal of Cleaner Production, 223, 1029–1041.

Ottosen, L. M., Bertelsen, I. M. G., Jensen, P. E., & Kirkelund, G. M. (2020). Sewage sludge ash as resource for phosphorus and material for clay brick manufacturing. Construction and Building Materials, 249, 118684.

Shi, H. S., & Kan, L. L. (2009). Leaching behavior of heavy metals from municipal solid wastes incineration (MSWI) fly ash used in concrete. Journal of Hazardous Materials, 164(2–3), 750–754.

Shih, P., Chang, J., Lu, H., & Chiang, L. (2005). Reuse of heavy metals containing sludges in cement production. Cement and Concrete Re-search, 35(11), 2110–2115.

Suh, Y. J., & Rousseaux, P. (2002). An LCA of alternative wastewater sludge treatment scenarios. Resources, Conservation & Recycling, 35(3), 191–200.

Świerczek, L., Cieślik, B. M., & Konieczka, P. (2018). The potential of raw sludge in construction industry – A review. Journal of Cleaner Production, 200, 342–356.

Vouk, D., Nakić, D., Štirmer, N., & Cheeseman, C. R. (2018). Influence of combustion temperature on the performance of sewage sludge ash as a supplementary cementitious material. Journal of Material Cycles and Waste Management, 20, 1458–1467.

Vouk, D., Serdar, M., Nakić, D., & Anić-Vučinić, A. (2016). Use of sludgegenerated at WWTP in the production of cement mortar and con-crete. Civil Engineer, 68(3), 199–210.

Wittmaier, M., Langer, S., & Sawilla, B. (2009). Possibilities and limitations of life cycle assessment (LCA) in the development of waste utili-zation systems – Applied examples for a region in Northern Germany. Waste Management, 29(5), 1732–1738.

Zhou, Y., Li, J., Lu, J., Cheeseman, C. R., & Poon, C. S. (2020b). Recycling incinerated sewage sludge ash (ISSA) as a cementitious binder by lime activation. Journal of Cleaner Production, 244, 118856.

Zhou, Y., Li, J., Lu, J., Cheeseman, C. R., & Poon, C. S. (2020a). Sewage sludge ash: A comparative evaluation with fly ash for potential use as lime-pozzolan binders. Construction and Building Materials, 242, 118160.