Influence of temperature on carbon and nitrogen dynamics during in situ aeration of aged waste in simulated landfill bioreactors. (September 2015)

• Record Type: Journal Article
• Authors: Tong, Huanhuan; Yin, Ke; Giannis, Apostolos; Ge, Liya; Wang, Jing-Yuan
• Is Part Of: Bioresource technology. Volume 192(2015)
• Page Start: 149
• Page End: 156
• Publication Date: 2015-09
• Subjects: In situ aeration -- Temperature effects -- Carbon conversion -- Leachate nitrogen; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2015.05.049
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Temperature effects on biochemical processes during in situ aeration were tested. Fastest carbon mineralization was realized under thermophilic condition. Organic nitrogen was the dominant nitrogen form in leachate after aeration. Higher variation of humic nitrogen occurred under thermophilic condition. Humic substances were enriched in the waste under thermophilic condition. Abstract: The effect of temperature on carbon and nitrogen compounds during in situ aeration of aged waste was investigated in lab-scale simulated landfill bioreactors at 35, 45 and 55 °C, respectively. The bioreactor operated at 55 °C presented the highest carbon mineralization rate in the initial stage, suggesting accelerated biodegradation rates under thermophilic conditions. The nitrogen speciation study indicated that organic nitrogen was the dominant species of total N in aerobic bioreactors due to ammonia removal. Leachate organic nitrogen was further fractionated to elucidate the fate of individual constituent. Detailed investigation revealed the higher bioconversion rates of N-humic and N-fulvic compounds compared to hydrophilic compounds in thermophilic conditions. At the end, waste material in 55 °C bioreactor was richer in highly matured humic substances (HS) verifying the high bioconversion rates.