The in situ aeration in an old landfill in China: Multi-wells optimization method and application

Liu, Lei; Ma, Jun; Xue, Qi‐Kun; Shao, Jingbang; Chen, Yijun; Zeng, Gang

doi:10.1016/j.wasman.2018.02.041

Cited by 23 publications

(8 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The variation rate of oxygen concentration at different radial distances changes from fast to slow and finally remained stabilized, indicating that the oxygen concentration eventually reached a steady state with time Cossu and Cestaro (2005),Ritzkowski and Stegmann (2013),Raga and Cossu (2014). andLiu et al (2018b) discovered similar observations.…”

mentioning

confidence: 65%

“…Researchers, including Lee et al (2002), Cossu and Cestaro (2005), Öncü et al (2012), Ritzkowski and Stegmann (2013), Raga et al (2015) and Liu et al (2018b), have conducted field monitoring experiments on oxygen concentration during aerobic ventilation in landfills to explore the change in landfill gas concentration during aerobic ventilation. Cossu and Cestaro (2005) reported the field gas concentration during aerobic ventilation at three old landfill sites in Italy under different aeration flow conditions.…”

Section: Introductionmentioning

confidence: 99%

“…The gas concentration distribution was investigated over time, and the influence of different aeration fan operation modes on the concentration of each gas component was assessed. Liu et al (2018b) proposed a multi-well optimized steam aeration method that was utilized during a field monitoring test in which the variation law of oxygen concentration in the landfill gradually increased, and the residual organic matter continuously decreased. The work mentioned above reflects the distribution characteristics of oxygen concentration in different landfills over time and under varying working conditions (e.g.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Prediction of oxygen distribution in the waste mass from an aeration well in bioreactor landfills

et al. 2023

Self Cite

View full text Add to dashboard Cite

The key to upgrade the efficiency of aerobic remediation of landfills is to determine the distribution characteristics of oxygen concentration during aerobic ventilation. This study discusses the distribution law of oxygen concentration with time and radial distance based on a single-well aeration test at an old landfill site. The transient analytical solution of the radial oxygen concentration distribution was deduced using the gas continuity equation and approximation of calculus and logarithmic functions. Oxygen concentration data from the field monitoring were compared with the results predicted by the analytical solution. The results indicated that the oxygen concentration initially increased and then decreased with prolonged aeration time. With an increase in radial distance, the oxygen concentration rapidly declined, followed by a gradual decrease. The influence radius of the aeration well increased slightly when the aeration pressure increased from 2 to 20 kPa. The field test data agreed with the analytical solution prediction results, preliminarily verifying the reliability of the oxygen concentration prediction model. Results from this study provide a basis of guidelines for the design, operation and maintenance management of a landfill aerobic restoration project.

show abstract

mentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Prediction of oxygen distribution in the waste mass from an aeration well in bioreactor landfills

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…Moreover, research indicates toxicants such as sulfide, ammonia, and emerging nanomaterials could seriously retard methane production at landfills [50,51].Further research should focus on eliminating toxicants before MSW is introduced into landfill as well as the life cycle assessment and commercial operating calculation of a re-designed landfill. In addition, turning landfill sites into city gardens or transforming solid waste into soil fertilizer could be a new solution after MSW codigests with EABM and reaches stabilization [51,52].…”

Section: Future Prospects and Current Challengesmentioning

confidence: 99%

The Impact of Exogenous Aerobic Bacteria on Sustainable Methane Production Associated with Municipal Solid Waste Biodegradation: Revealed by High-Throughput Sequencing

Liu

et al. 2020

Sustainability

Self Cite

View full text Add to dashboard Cite

In this work, the impact of exogenous aerobic bacteria mixture (EABM) on municipal solid waste (MSW) is well evaluated in the following aspects: biogas production, leachate analysis, organic waste degradation, EABM population, and the composition of microbial communities. The study was designed and performed as follows: the control bioreactor (R1) was filled up with MSW and the culture medium of EABM and the experimental bioreactor (R2) was filled up with MSW and EABM. The data suggests that the composition of microbial communities (bacterial and methanogenic) in R1 and R2 were similar at day 0, while the addition of EABM in R2 led to a differential abundance of Bacillus cereus, Bacillus subtilis, Staphylococcus saprophyticus, Staphlyoccus xylosus, and Pantoea agglomerans in two bioreactors. The population of exogenous aerobic bacteria in R2 greatly increased during hydrolysis and acidogenesis stages, and subsequently increased the degradation of volatile solid (VS), protein, lipid, and lignin by 59.25%, 25.68%, 60.47%, and 197.62%, respectively, compared to R1. The duration of hydrolysis and acidogenesis in R2 was 33.33% shorter than that in R1. At the end of the study, the accumulative methane yield in R2 (494.4 L) was almost three times more than that in R1 (187.4 L). In addition, the abundance of acetoclasic methanogens increased at acetogenesis and methanogenesis stages in both bioreactors, which indicates that acetoclasic methanogens (especially Methanoseata) could contribute to methane production. This study demonstrates that EABM can accelerate organic waste degradation to promote MSW biodegradation and methane production. Moreover, the operational parameters helped EABM to generate 20.85% more in accumulative methane yield. With a better understanding of how EABM affects MSW and the composition of bacterial community, this study offers a potential practical approach to MSW disposal and cleaner energy generation worldwide.

show abstract

“…This was confirmed in numerous measurements [22,14,10], studies of mechanical properties [18,15] as well as empirical permeability models [2,21], all emphasising to a degree that availability of field data on medium properties would pose a limitation on accurate predictions. Amongst the more computationally intensive studies are some using neural network optimisation [13], graph theory [11] and closed commercial solvers [8,12].…”

Section: Introductionmentioning

confidence: 99%

Horizontal landfill gas wells: Geometry, physics of flow and connection with the atmosphere

Halvorsen

Nec

Huculak³

2019

Physics and Chemistry of the Earth, Parts A/B/C

View full text Add to dashboard Cite

The in situ aeration in an old landfill in China: Multi-wells optimization method and application

Cited by 23 publications

References 36 publications

Prediction of oxygen distribution in the waste mass from an aeration well in bioreactor landfills

Prediction of oxygen distribution in the waste mass from an aeration well in bioreactor landfills

The Impact of Exogenous Aerobic Bacteria on Sustainable Methane Production Associated with Municipal Solid Waste Biodegradation: Revealed by High-Throughput Sequencing

Horizontal landfill gas wells: Geometry, physics of flow and connection with the atmosphere

Contact Info

Product

Resources

About