Case study of landfill leachate recirculation using small-diameter vertical wells

Jain, Pradeep; Ko, Jae Hac; Kumar, Dinesh; Powell, J. G. F.; Kim, Hwidong; Maldonado, Lizmarie; Townsend, Timothy G.; Reinhart, Debra R.

doi:10.1016/j.wasman.2014.07.005

Cited by 20 publications

(7 citation statements)

References 15 publications

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“…Longer-term performance of the NRRL liquids addition well field was reported in Jain et al (2014a). More than 25,000 m 3 (6,600,000 gal) were added over a 5-year period.…”

Section: Operational Experiencementioning

confidence: 95%

Sustainable Practices for Landfill Design and Operation

Townsend¹,

Powell²,

Jain³

et al. 2015

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“…Longer-term performance of the NRRL liquids addition well field was reported in Jain et al (2014a). More than 25,000 m 3 (6,600,000 gal) were added over a 5-year period.…”

Section: Operational Experiencementioning

confidence: 95%

Sustainable Practices for Landfill Design and Operation

Townsend¹,

Powell²,

Jain³

et al. 2015

Self Cite

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“…In the 1970s, leachate recirculation, which was a means of accelerating the waste degradation in landfills, was introduced in the US (Pohland, 1975). A field test for leachate recirculation was conducted using small-diameter vertical wells in a Florida landfill (Jain et al, 2014a). A liquid-injection test using a vertical well with the injection flowrate of 1.0-5.4m 3 h −1 was conducted in a Florida landfill, and the pore water pressure and temperature around the injection well were measured (Kadambala et al, 2011(Kadambala et al, , 2016Singh et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Temperature monitoring during a water-injection test using a vertical well in a newly filled MSW layer of a landfill

et al. 2019

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High temperature may adversely affect municipal solid waste (MSW) biodegradation and lead to an increase in the deformation of high-density polyethylene (HDPE) pipes used for the collection of leachate and landfill gas in landfills. The test in this study was to change the waste temperature around the vertical injection well by water injection using a vertical well. The test was conducted intermittently with two different flowrates in a newly filled MSW layer of a landfill. The temperature, gas pressure and leachate level in the test area were simultaneously monitored during this study. The results showed that the waste temperature around the vertical injection well was effectively changed by water injection, which did not result in a significant rise in the leachate level. During water injection, the waste temperature influence distance in the horizontal direction increased with depth from the leachate level to the bottom of the injection well. The bottom temperature of the injection well decreased to near the water-injection temperature. The range of influence of the waste temperature caused by intermittent water injections slightly increased in this test. After water injection was stopped, the waste temperature near the vertical injection well increased quickly initially, and then the increments became more gradual with time. When the leachate level recovered stably, there was still a temperature gradient around the injection well within the range of influence. The temperature and gas pressure in the waste above the leachate level and far away from the injection well were slightly influenced by water injection.

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“…To simulate those conditions, some of the experiments extended up to six years; in fact, the four longest studies (2-6 years) are simulations of landfill conditions. In order to increase the biodegradation rates of reactors simulating landfills, leachate can be recirculated, as has been done in different studies [80][81][82].…”

Section: Methodsmentioning

confidence: 99%

Degradation of Plastics under Anaerobic Conditions: A Short Review

et al. 2020

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Plastic waste is an issue of global concern because of the environmental impact of its accumulation in waste management systems and ecosystems. Biodegradability was proposed as a solution to overcome this problem; however, most biodegradable plastics were designed to degrade under aerobic conditions, ideally fulfilled in a composting plant. These new plastics could arrive to anaerobic environments, purposely or frequently, because of their mismanagement at the end of their useful life. This review analyzes the behavior of biodegradable and conventional plastics under anaerobic conditions, specifically in anaerobic digestion systems and landfills. A review was performed in order to identify: (a) the environmental conditions found in anaerobic digestion processes and landfills, as well as the mechanisms for degradation in those environments; (b) the experimental methods used for the assessment of biodegradation in anaerobic conditions; and (c) the extent of the biodegradation process for different plastics. Results show a remarkable variability of the biodegradation rate depending on the type of plastic and experimental conditions, with clearly better performance in anaerobic digestion systems, where temperature, water content, and inoculum are strictly controlled. The majority of the studied plastics showed that thermophilic conditions increase degradation. It should not be assumed that plastics designed to be degraded aerobically will biodegrade under anaerobic conditions, and an exact match must be done between the specific plastics and the end of life options that they will face.

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Case study of landfill leachate recirculation using small-diameter vertical wells

Cited by 20 publications

References 15 publications

Sustainable Practices for Landfill Design and Operation

Sustainable Practices for Landfill Design and Operation

Temperature monitoring during a water-injection test using a vertical well in a newly filled MSW layer of a landfill

Degradation of Plastics under Anaerobic Conditions: A Short Review

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