Evaluation of monitoring indicators for the post-closure care of a landfill for MSW characterized with low lignin content

Zheng, Wei; Lü, Fan; Bolyard, Stephanie C.; Shao, Liming; Reinhart, Debra R.; He, Pinjing

doi:10.1016/j.wasman.2014.10.031

Cited by 16 publications

(9 citation statements)

References 24 publications

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“…It was only a reference for evaluating the stabilization of the degradation of the waste sample . C/L was widely used to analysis the stabilization of the degradation of the waste sample (Kelly, 2006) ; Reinhart,1997; Zheng,2015).The test results could be obviously different because of the indeterminacy of sampling for the evaluation the stability in field scale landfill. At the present time, the test results could be representative by increasing amount of sampling.…”

Section: Resultsmentioning

confidence: 99%

Field‐scale monitoring test of aeration for enhancing biodegradation in an old landfill in China

Liu

Xue

Zeng

et al. 2015

Env Prog and Sustain Energy

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The field-scale test of aeration to accelerate biodegradation of the waste was conducted, which was selected in an old landfill in Hubei province in China. The long-term monitoring was presented, lasted for 11 months, to estimate the degradation stability of the landfill. The monitoring parameters included the temperature, COD and BOD of leachate, gas concentration, water level, settlement, and cellulose/lignin. The results show that the waste degradation rate was increased under the aeration condition, while there was a trend of the stability in the whole waste body. The water level within the landfill was adjusted by discharge measurements, contributing to the buildup of the oxygen environment in landfill. The C/L could be used to assess the stability of the full-scale waste during the degradation process. But, there was obviously discrete by means of drilled sampling. The field-scale test was needed to provide the evidence for aeration engineering operation.

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Section: Resultsmentioning

confidence: 99%

Field‐scale monitoring test of aeration for enhancing biodegradation in an old landfill in China

Liu

Xue

Zeng

et al. 2015

Env Prog and Sustain Energy

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“…Performance based assessments are commonly used to evaluate the progress of a landfill towards completion and the end of PCC. Numerous studies have developed stability indicators to better understand whether a landfill has reached completion (Brandstätter et al, 2015;Laner et al, 2012;Zheng et al, 2015). Despite these efforts there are still gaps in understanding what is actually required to achieve such values.…”

Section: Performance Assessment Using Stability Criteriamentioning

confidence: 99%

Application of landfill treatment approaches for stabilization of municipal solid waste

Bolyard

Reinhart

2016

Waste Management

Self Cite

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This research sought to compare the effectiveness of three landfill enhanced treatment approaches aimed at removing releasable carbon and nitrogen after anaerobic landfilling including flushing with clean water (FB 1), leachate recirculation with ex-situ treatment (FB 2), and leachate recirculation with ex-situ treatment and in-situ aeration (FB 3). After extensive treatment of the waste in the FB scenarios, the overall solids and biodegradable fraction were reduced relative to the mature anaerobically treated waste. In terms of the overall degradation, aeration did not provide any advantage over flushing and anaerobic treatment. Flushing was the most effective approach at removing biodegradable components (i.e. cellulose and hemicellulose). Leachate quality improved for all FBs but through different mechanisms. A significant reduction in ammonia-nitrogen occurred in FB 1 and 3 due to flushing and aeration, respectively. The reduction of chemical oxygen demand (COD) in FB 1 was primarily due to flushing. Conversely, the reduction in COD in FBs 2 and 3 was due to oxidation and precipitation during Fenton's Reagent treatment. A mass balance on carbon and nitrogen revealed that a significant fraction still remained in the waste despite the additional treatment provided. Carbon was primarily converted biologically to CH4 and CO2 in the FBs or removed during treatment using Fenton's Reagent. The nitrogen removal occurred through leaching or biological conversion. These results show that under extensive treatment the waste and leachate characteristics did meet published stability values. The minimum stability values achieved were through flushing although FB 2 and 3 were able to improve leachate quality and solid waste characteristics but not to the same extent as FB 1.

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“…Laboratory‐scale and pilot‐scale tests are conducted to understand the mechanics of the acceleration degradation of waste by aeration and to verify the feasibility of using air injection to enhance the degradation stability of fresh and old wastes . Field site test cannot provide complete results compared with laboratory‐scale and pilot‐scale tests.…”

Section: Issue and Proposalmentioning

confidence: 99%

The viability of design and operation of the air injection well for improvement In Situ repair capacity in landfill

Liu

Xue

et al. 2016

Env Prog and Sustain Energy

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The rationality of air injection well for operation parameter design is important for effective repair and safety of aeration systems in landfills. On the basis of the literature, the operating results of the air injection systems used in field sites were summarized, and the key design parameters were addressed. The operation and assessment of aeration systems were presented. First, the behavior of oxygen transport was caused by the characteristics of the pore media in the waste body. A mathematical model was needed to address the spatial–temporal evolutions of oxygen concentration in landfill. The optimum design method of gas injection well should be developed to elevate the oxygen content at maximum level across the field site, applying to most landfills. Second, an effective leachate exchange and recirculation plan should be developed to ensure sustained aerobic reaction in full scale. Some experiences of leachate discharge in field sites were presented. Third, the relationship between oxygen consumption and stability indicators should be determined to create an effective aeration plan. This function will help evaluate the reliability of aeration systems. This study provides evidence for the design, construction, operation, and effectiveness assessment of air injection well in repair engineering of landfills. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 412–419, 2017

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Evaluation of monitoring indicators for the post-closure care of a landfill for MSW characterized with low lignin content

Cited by 16 publications

References 24 publications

Field‐scale monitoring test of aeration for enhancing biodegradation in an old landfill in China

Field‐scale monitoring test of aeration for enhancing biodegradation in an old landfill in China

Application of landfill treatment approaches for stabilization of municipal solid waste

The viability of design and operation of the air injection well for improvement In Situ repair capacity in landfill

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