Futuristic On-Site Leachate Management

Meeroff, Daniel E.; Lakner, J.; Shaha, Bishow N.; Walecki, E.; Harris, Alton D.; Meyer, Larry

doi:10.1061/9780784479865.001

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…At present, the dominant leachate/wastewater treatment techniques are based on biological treatment processes, where main removal mechanisms of cVMSvolatilization and sorption to sludgehave been determined. − However, before being transferred to treatment processes, leachates in most landfills are stored in opened storage pond, where long hydraulic retention time of the wastewater (>24 h ∼ 10s of days) and non-neutral (acidic or basic) pH of leachates may lead to significant removal (volatilization and hydrolysis) of cVMS. More important, landfill leachates often contain high concentrations of dissolve organic matter (DOM) and NO 3 – , - photosensitizers that could generate hydroxyl radicals (•OH) via photochemical reaction. − Furthermore, some acid landfill leachates contained high levels of transition metal ions (such as Fe 2+ ), which could accelerate •OH production rates via photo-Fenton reaction with hydrogen peroxide (a common constituent of natural water-body) . As cVMS in air could be hydroxylated by •OH, − the indirect phototransformation (hydroxylation) of cVMS in leachates of the storage pond may also be possible.…”

Section: Introductionmentioning

confidence: 99%

Methylsiloxanes Release from One Landfill through Yearly Cycle and Their Removal Mechanisms (Especially Hydroxylation) In Leachates

Zhi

et al. 2017

Environ. Sci. Technol.

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In one yearly cycle (2016), D4 and D5 were detected in biogas samples (n = 36, 0.105-2.33 mg/m) from a Chinese municipal landfill, while D4-D6 were detected in influents/effluents of leachate storage pond (n = 72, < LOQ-30.5 μg/L). Mass loads of cVMS in both biogas (591-6575 mg/d) and leachate influents (659-5760 mg/d) increased from January to July (summer), and then decreased from July to December (winter). Removal experiments indicated that 1) hydrolysis and volatilization were predominant removal mechanism for D4 and D5, respectively, in leachate storage pond, responsible for their more significant removal (94.5-100%) in August; 2) indirect phototransformation (t = 25.5-87.0 days), such as hydroxylation by OH radical generated in leachates, was the predominant (50.0-75.5%) removal pathway for D6, which led to the largest removal efficiencies (65.2-73.7%) in June, the month with the largest sun light intensity and highest photosensitizer (e.g., Fe and NO) concentrations. Monohydroxylated products of D5 and D6, D4TOH and D5TOH, were detected in leachate effluents (39.6-187 ng/L) during May-July. Compared to D5 and D6, volatilization half-lives of D4TOH (86.3 days) and D5TOH (177 days) in leachates were 2.9 and 1.4 times longer, while their hydrolysis half-lives (7.50 days for D4TOH and 21.5 days for D5TOH) were 7.1 and 10 times shorter, respectively.

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Section: Introductionmentioning

confidence: 99%

Methylsiloxanes Release from One Landfill through Yearly Cycle and Their Removal Mechanisms (Especially Hydroxylation) In Leachates

Zhi

et al. 2017

Environ. Sci. Technol.

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“…Programs incentivizing power plants to install water recovery systems by 2023 are anticipated to drive the flue gas desulfurization wastewaters into hypersalinity [65]. Landfill leachates vary widely from low to high salinities (as much as 81,000 ppm TDS) and additionally have complex compositions that include heavy metals, bacteria, organic molecules, and other contaminants [48,[66][67][68][69]. Even for low-salinity leachates, increasingly strict effluent regulations are compelling onsite dewatering, concentrating the streams into the hypersaline range [48].…”

Section: Sources and Primary Characteristics Of High-salinity Streamsmentioning

confidence: 99%

Drivers, challenges, and emerging technologies for desalination of high-salinity brines: A critical review

et al. 2022

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“…In these experiments, the researchers demonstrated that the EMOH device could reduce TOC by 75% in a short period of time.Lakner [4] also demonstrated that the device entrained high concentrations of oxygen, which created an oxygen supersaturation condition. It was suggested that the EMOH process, along with introduced bacteria, would decrease benthic nutrients from prior copper (II) sulfate treatments, thereby reducing the bioavailable nutrients in the water column and eliminating the use of copper sulfate.EMOH is a static device that inserts atmospheric oxygen into the water stream bringing the dissolved oxygen levels to saturation[6]. The primary activity is to increase the oxygen levels of the water through mechanical means.…”

mentioning

confidence: 99%

Algal Control in Warm Weather Pond Using EMOH Device

Bloetscher¹,

Meeroff²,

Roblyer³

et al. 2018

JEP

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Nuisance algal blooms have been a topic of discussion in Florida as a result of highly visible adverse impacts to coastal waters, but algae is hardly a new concern for warm weather communities. The typical treatment is with copper sulfate. However, copper has been identified by regulatory agencies as a contaminant of concern in coastal waters and has been targeted for stricter regulations, potentially limiting its use in the future for algae control. The EMOH device was proposed as a means to test whether a "green" solution could be found to this algae concern. EMOH creates high volume oxidation in concert with activated organisms. The initial treatment effort covered one year (2016). During treatment, water quality was monitored with periodic measurements of the benthic detrital layer, which is a precursor to algal blooms in these ponds. Photographs of the extent of algal coverage on the surface, water quality in the pond and thickness measurements of the detrital layer defined success. Through the hot summer, despite regular influx of nutrients and rain, the amount of algae declined, and the detrital layer decreased in thickness from 22-24 inches to 7-8 inches. The decrease of the detrital layer means that over time, the benthic source of nutrient availability can be more controlled. The authors concluded that the EMOH process was successful and that physically removing the detrital layer may be an important step in long-term algal reductions.

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Futuristic On-Site Leachate Management

Cited by 5 publications

References 5 publications

Methylsiloxanes Release from One Landfill through Yearly Cycle and Their Removal Mechanisms (Especially Hydroxylation) In Leachates

Methylsiloxanes Release from One Landfill through Yearly Cycle and Their Removal Mechanisms (Especially Hydroxylation) In Leachates

Drivers, challenges, and emerging technologies for desalination of high-salinity brines: A critical review

Algal Control in Warm Weather Pond Using EMOH Device

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