Operation of a Landfill Bioreactor in a Cold Climate: Early Results and Lessons Learned

Hettiaratchi, Joseph P.A., Hettiarachchi, Hiroshan, Meegoda, Jay N. and Hunte, Carlos A., (2013). Operation of a Landfill Bioreactor in a Cold Climate: Early Results and Lessons Learned. Journal of Hazardous, Toxic and Radioactive Waste, 17(4), 307-316

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  • Sub-type Journal article
    Author Hettiaratchi, Joseph P.A.
    Hettiarachchi, Hiroshan
    Meegoda, Jay N.
    Hunte, Carlos A.
    Title Operation of a Landfill Bioreactor in a Cold Climate: Early Results and Lessons Learned
    Appearing in Journal of Hazardous, Toxic and Radioactive Waste
    Volume 17
    Issue No. 4
    Publication Date 2013
    Place of Publication Reston
    Publisher American Society of Civil Engineers
    Start page 307
    End page 316
    Language eng
    Abstract This manuscript presents a detailed discussion of the challenges faced and lessons learned during the initial phase of operation of the Calgary Biocell. The Calgary Biocell is a full-scale pilot project that has been implemented to acquire data and demonstrate the applicability of the biocell concept under severe winter conditions. The biocell concept involves operating a waste cell in three phases: first as an anaerobic bioreactor to recover biogas and produce energy, second as an aerobic bioreactor or an in-ground composter, and finally mined to recover processed waste and land for reuse. The Calgary Biocell has been in operation in its first phase, as an anaerobic bioreactor, for over the past five years. The cell was equipped with sensors to gather performance data during anaerobic and aerobic bioreactor operation. The settlement, moisture content, pressure, and temperature sensors provided early data, but failed after several months of cell operation. Regular monitoring and repairs were performed to ensure that gas was captured and used to generate power. The waste settlement data were collected during waste placement and before final closure of the cell from various depths of the cell. Lift 1 reported approximately 700 mm of settlement, which is approximately 14% strain, when the biocell was ready to be capped. After closure, only a limited amount of waste settlement data could be collected because of the failure of the settlement sensors and the real time data gathering system. The automated leachate recirculation system also failed during the past five years and was repaired. The liquid level of the leachate sump during automated operation was more consistent. The average initial and final moisture contents of MSW in the biocell were found to be at 25 and 36%, respectively, whereas the field capacity was determined to be 44% (wet basis). The temperature of landfill gas leaving the biocell ranged between 3 and 12°C in the winter/spring and approximately 20°C during summer. The landfill gas production rate averaged 59  m3/h, but dropped considerably during the winter months.
    Copyright Holder American Society of Civil Engineers
    Copyright Year 2013
    Copyright type All rights reserved
    ISSN 21535493
    DOI 10.1061/(ASCE)HZ.2153-5515.0000159
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    Created: Mon, 14 Sep 2015, 23:29:35 JST by Claudia Matthias on behalf of UNU FLORES