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Deer track bioreactor experiment / Christopher A. Bareither in Journal of geotechnical and geoenvironmental engineering, Vol. 138 N° 6 (Juin 2012) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 6 (Juin 2012) . - pp. 658–670 Titre : Deer track bioreactor experiment : Field-scale evaluation of municipal solid waste bioreactor performance Type de document : texte imprimé Auteurs : Christopher A. Bareither, Auteur ; Ronald J. Breitmeyer, Auteur ; Craig H. Benson, Auteur Année de publication : 2012 Article en page(s) : pp. 658–670 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Solid  waste  Landfills  Bioreactor  Decomposition  Leachate  Settlement Résumé : The Deer Track Bioreactor Experiment (DTBE) was a field-scale experiment conducted in a drainage lysimeter (8.2-m height, 2.4-m diameter) to assess the physical, chemical, and biological response of municipal solid waste with leachate addition. The experiment was operated for 1,067 days, with leachate dosing initiated on Day 399. Fresh leachate collected from a full-scale landfill was used for each dose. The ratio of cumulative leachate effluent to influent volume increased during dosing and leveled off at approximately 80%, indicating field capacity was achieved. Peak Darcy flux ranged from 2×10−7  m/s to 4×10−5  m/s, with larger flux computed for the last four doses when waste saturation was higher. During the experiment, the average dry unit weight of the waste increased 28% and the dry-weight water content (wd) increased 18%; field capacity of the waste was 44 to 48% on a dry-weight basis. Biochemical methane potential decreased from 51.4 to 3.4  mL-CH4/g-dry, indicating that 93% of the potential methane embodied in the waste was removed. The pH of the effluent increased, whereas biochemical oxygen demand (BOD), chemical oxygen demand (COD), and BOD:COD all decreased during dosing. Immediate compression occurred for 1–2 weeks following waste placement, and the immediate compression ratio C′c was 0.23. The average rate of time-dependent compression (C′α) ranged between 0.048 and 0.35 and varied systematically with waste temperature (increasing C′α with increasing temperature). ISSN : 1090-0241 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000636 [article] Deer track bioreactor experiment : Field-scale evaluation of municipal solid waste bioreactor performance [texte imprimé] / Christopher A. Bareither, Auteur ; Ronald J. Breitmeyer, Auteur ; Craig H. Benson, Auteur . - 2012 . - pp. 658–670. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 6 (Juin 2012) . - pp. 658–670 Mots-clés : Solid  waste  Landfills  Bioreactor  Decomposition  Leachate  Settlement Résumé : The Deer Track Bioreactor Experiment (DTBE) was a field-scale experiment conducted in a drainage lysimeter (8.2-m height, 2.4-m diameter) to assess the physical, chemical, and biological response of municipal solid waste with leachate addition. The experiment was operated for 1,067 days, with leachate dosing initiated on Day 399. Fresh leachate collected from a full-scale landfill was used for each dose. The ratio of cumulative leachate effluent to influent volume increased during dosing and leveled off at approximately 80%, indicating field capacity was achieved. Peak Darcy flux ranged from 2×10−7  m/s to 4×10−5  m/s, with larger flux computed for the last four doses when waste saturation was higher. During the experiment, the average dry unit weight of the waste increased 28% and the dry-weight water content (wd) increased 18%; field capacity of the waste was 44 to 48% on a dry-weight basis. Biochemical methane potential decreased from 51.4 to 3.4  mL-CH4/g-dry, indicating that 93% of the potential methane embodied in the waste was removed. The pH of the effluent increased, whereas biochemical oxygen demand (BOD), chemical oxygen demand (COD), and BOD:COD all decreased during dosing. Immediate compression occurred for 1–2 weeks following waste placement, and the immediate compression ratio C′c was 0.23. The average rate of time-dependent compression (C′α) ranged between 0.048 and 0.35 and varied systematically with waste temperature (increasing C′α with increasing temperature). ISSN : 1090-0241 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000636