The S.An.A.® concept: Semi-aerobic, Anaerobic, Aerated bioreactor landfill

Waste Management
Luca MorelloRaffaello Cossu

Abstract

Hybrid Bioreactor Landfills are designed to enhance and speed up biological processes, aiming at reducing the duration of post operational phase until landfill completion. S.An.A.® (Semi-aerobic, Anaerobic, Aerated) concept consists in a Hybrid Bioreactor featuring a first semi-aerobic phase to enhance the methane production occurring in the following anaerobic step and a forced aeration for the abatement of the residual emissions. At the end of the last step, semi-aerobic conditions are restored and flushing applied for leaching residual non-biodegradable compounds. Results of the application of S.An.A.® concept to a lab scale bioreactor system showed that pre-aeration was effective in controlling the concentration of VFA, increasing pH and stimulating methane production during anaerobic phase; in particular with intermittent airflow the methane potential was 50% higher respect to control reactors. Forced aeration reduced organic compounds and nitrogen concentration in leachate of an order of magnitude, better performing in low airflow reactors. S.An.A.® Hybrid bioreactors proved to be an efficient system both for increasing methane production and reaching landfill completion in shorter time, suggesting that with proper landfi...Continue Reading

Citations

Dec 4, 2019·Environmental Science and Pollution Research International·Zhongping QiuMin Li
Jan 6, 2021·Environmental Science and Pollution Research International·Guobin JiangQibin Li
Jan 29, 2020·Journal of Environmental Management·Valentina Grossule, Maria Cristina Lavagnolo

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