an official journal of: published by:
Editor in Chief: RAFFAELLO COSSU


  • Valentina Grossule - Department of Civil, Environmental and Architectural Engineering, University of Padova, Italy
  • Maria Cristina Lavagnolo - Department of Civil, Architectural and Environmental Engineering, University of Padova, Italy


Released under CC BY-NC-ND

Copyright: © 2019 CISA Publisher


The processes involved in semi-aerobic landfills are heavily influenced by local climate conditions and waste composition. In particular, when considering rainfall seasonality in a tropical climate, the lack of moisture during the dry season and heavy rainfalls during the wet season may negatively affect biodegradation processes and landfill emissions. The aim of the present study was to investigate the performance of semi-aerobic landfill under tropical dry-wet climate conditions and to assess the potential benefits afforded by appropriate management of water input when operating the landfill by overlaying a new layer of waste in each climate season. Six lab-scale lysimeters were operated in two phases to reproduce, on two subsequent waste layers, a sequence of dry and wet tropical seasons: two with an initial dry phase, two with an initial dry phase under controlled watering and two with an initial wet phase, during which leachate was stored to allow recirculation during the subsequent dry phase. In each pair of lysimeters one was filled with low putrescible content waste and the other with high putrescible content waste. Although appropriate management of water input significantly improved landfill performance under dry climate conditions, the overlaying of a new layer of waste in each climate season played a fundamental role in ensuring good stabilisation over the one year simulation period; following stabilisation, the landfill bottom layer acts as an internal attenuating biological filter. In particular, under initial dry conditions, final BOD COD and ammonia values detected were below 20mgO2/L, 200mgO2/L, and 30mgN/L, respectively.


Editorial History

  • Received: 19 Sep 2019
  • Revised: 22 Dec 2019
  • Accepted: 21 Jan 2020
  • Available online: 05 Mar 2020


Ahmadifar, M., Sartaj, M., Abdallah, M., 2016. Investigating the performance of aerobic, semi-aerobic, and anaerobic bioreactor landfills for MSW management in developing countries. J. Mater. Cycles Waste Manag. 18, 703–714.
DOI 10.1007/s10163-015-0372-0

Aziz, S.Q., Aziz, H.A., Yusoff, M.S., Bashir, M.J.K., Umar, M., 2010. Leachate characterization in semi-aerobic and anaerobic sanitary landfills: A comparative study. J. Environ. Manage. 91, 2608–2614.
DOI 10.1016/j.jenvman.2010.07.042

Chen, D., and Chen, H.W., 2013. Using the Köppen classification to quantify climate variation and change: An example for 1901-2010. Environmental Development 6(1): 69–79.
DOI 10.1016/j.envdev.2013.03.007

Cossu, R., 2019. Full-scale Operation of the Sassari Landfill. Problems in Semi-aerobic Operation. Personal comunication

Cossu, R., Stegmann, R., 2018. Solid Waste Landfilling, Concepts, Processes, Technology. Elsevier, ISBN: 9780128183366

D.G.R. 2461/14 – Delibera Giunta Regionale n 2461, 2014. Linee guida per la progettazione e gestione sostenibile delle discariche. Bollettino Ufficiale Regione Lombardia, n.41 (10/10/2014)

Grossule, V., Lavagnolo, M.C., 2019. Lab tests on semi-aerobic landfilling of MSW under varying conditions of water availability and putrescible waste content. Submitted to Journal of Environmental Management

Grossule, V., Morello, L., Cossu, R., Lavagnolo, M.C., 2018. Bioreactor landfills : comparison and kinetics of the different systems, Detritus, 03, 100–113,
DOI 10.31025/2611-4135/2018.13703

Kortegast, A., Richards, B.A., Yong, S., Chock, E.T., Bryce, A., Eldridge, S., Robinson, H., Carville, M., 2007. Leachate generation and treatment at the bukit tagar landfill, Malaysia. In: Paper presented to Sardinia 2007, the Eleventh International Waste Management and Landfill Symposium, S. Margherita di Pula. Cagliari, Italy, 1-5 October 2007

Kottek, M., Grieser, J., Beck, C., Rudolf, B., Rubel, F., 2006. World map of the Köppen-Geiger climate classification updated. Meteorologische Zeitschrift 15(3): 259–263.
DOI 10.1127/0941-2948/2006/0130

Lavagnolo, M.C., Grossule, V., Raga, R., 2018. Innovative dual-step management of semi-aerobic landfill in a tropical climate. Waste Manag. 1–10.
DOI 10.1016/j.wasman.2018.01.017

Matsufuji, Y., Tanaka, A., Cossu, R., 2018. Semiaerobic landfilling. In Cossu, R., Stegmann, R. Solid Waste Landfilling, Concepts, Processes, Technology. Elsevier, 2018, ISBN: 9780128183366

Malek, M.I., Shaaban, M.G., 2008. Landfill Common Method and Pranctices of Solid Waste Disposal in Malaysia. ISWA World Congress