A comparison of refuse attenuation in laboratory and field scale lysimeters

• Published in: Waste management (Elmsford) Vol. 22; no. 1; pp. 29 - 35
• Main Authors: Youcai, Zhao, Luochun, Wang, Renhua, Hua, Dimin, Xu, Guowei, Gu
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 2002; New York, NY Elsevier Science
• Subjects: Applied sciences; Biodegradation of pollutants; Biodegradation, Environmental; Biological and medical sciences; Biotechnology; Environment and pollution; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Industrial applications and implications. Economical aspects; Manufactured Materials; Models, Theoretical; Pollution; Refuse Disposal; Reproducibility of Results; Soil Pollutants - analysis; Urban and domestic wastes; Volatilization; Wastes; Water Pollutants - analysis; Asia; China; Biodegradation; Laboratory study; Waste dumping; Urban waste; Lysimetry; Ammonia; Sanitary landfill; Chemical oxygen demand; Biological oxygen demand; Solid waste; pH; Lixiviation; Leachate; Nitrogen Compounds; Field study
• ISSN: 0956-053X; 1879-2456
• DOI: 10.1016/S0956-053X(01)00028-9

For this study, small and middle scale laboratory lysimeters, and a large scale field lysimeter in situ in Shanghai Refuse Landfill, with refuse weights of 187, 600 and 10,800,000 kg, respectively, were created. These lysimeters are compared in terms of leachate quality (pH, concentrations of COD, BOD and NH 3–N), refuse composition (biodegradable matter and volatile solid) and surface settlement for a monitoring period of 0–300 days. The objectives of this study were to explore both the similarities and disparities between laboratory and field scale lysimeters, and to compare degradation behaviors of refuse at the intensive reaction phase in the different scale lysimeters. Quantitative relationships of leachate quality and refuse composition with placement time show that degradation behaviors of refuse seem to depend heavily on the scales of the lysimeters and the parameters of concern, especially in the starting period of 0–6 months. However, some similarities exist between laboratory and field lysimeters after 4–6 months of placement because COD and BOD concentrations in leachate in the field lysimeter decrease regularly in a parallel pattern with those in the laboratory lysimeters. NH 3–N, volatile solid (VS) and biodegradable matter (BDM) also gradually decrease in parallel in this intensive reaction phase for all scale lysimeters as refuse ages. Though the concrete data are different among the different scale lysimeters, it may be considered that laboratory lysimeters with sufficient scale are basically applicable for a rough simulation of a real landfill, especially for illustrating the degradation pattern and mechanism. Settlement of refuse surface is roughly proportional to the initial refuse height.