Evolution of clog formation with time in columns permeated with synthetic landfill leachate

VanGulck, Jamie F.; Rowe, R. Kerry

doi:10.1016/j.jconhyd.2004.06.001

Cited by 79 publications

(36 citation statements)

References 17 publications

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“…carbonate precipitation). This mechanism was previously reported by VanGulck and Rowe (2004) when soils were permeated with leachate.…”

Section: Resultssupporting

confidence: 71%

“…Additionally, the observed decease rate of specimen 3 is fastest among all above specimens, finally stabilized at around 5.22 × 10 -9 cm/s, with a reduction by one order of magnitude. This phenomenon ascribed to the saturation liquid, landfill leachate, which is responsible for the reproduction and development of anaerobic microorganisms that partially blocked the soil pores (VanGulck and Rowe, 2004). In the case of EC, specimens 2 and 3 increased with the increase of PVF as shown in Fig.…”

Section: Resultsmentioning

confidence: 88%

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Long-term hydraulic conductivity of compacted clay permeated with landfill leachates

Tang

Wang

Chen

et al. 2016

JGS Special Publication

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This paper studies the effects of bio-clogging on hydraulic conductivity of compacted soils used as landfill liners. Landfill leachate contains a large amount of microorganism and bacterial biomass, which was likely to cause bio-clogging in landfill liners. To interpret the effect of bio-clogging on hydraulic property of compacted clays, in this study, a series of laboratory-scale hydraulic conductivity tests were conducted. The long term hydraulic conductivity of compacted clays was measured with distilled water, landfill leachate and one type of nutrient solution. The laboratory test results show that the hydraulic conductivity of compacted clays permeated with distilled water stabilized at approximately 3.77 × 10 -8 cm/s, and the hydraulic conductivity of compacted clays permeated with landfill leachate or nutrient solution ranged between 1.1 × 10 -8 cm/s and 5.22 × 10 -9 cm/s. Such a significant difference was attributed to the effect of bio-clogging. The microorganism and bacterial biomass reduced the hydraulic conductivity up to one order of magnitude. This study indicated that the bio-clogging is approximately a feasible method to create low-cost and low-hydraulic conductivity barriers by using locally available clayed soils.

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“…carbonate precipitation). This mechanism was previously reported by VanGulck and Rowe (2004) when soils were permeated with leachate.…”

Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 88%

Long-term hydraulic conductivity of compacted clay permeated with landfill leachates

Tang

Wang

Chen

et al. 2016

JGS Special Publication

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“…The synthetic leachate was prepared to meet the following objectives: 1) to be more representative of real leachate in Sri Lanka, and 2) to be stable during the experiment (two weeks). The preparation of synthetic leachate in this study was adapted from reported data [5] and previous studies with some modifications [6], [7]. Water qualities of supplied synthetic sewage and synthetic leachate are shown in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Microcosm Experiments on a Coconut-Fibre Biofilm Treatment System to Evaluate Waste Water Treatment Efficiencies

Sato¹,

Dharmarathne²,

Saito³

et al. 2017

GEOMATE

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Interest in utilization of locally available biomasses as biofilm support media for wastewater treatment in developing countries is increasing. In this study, microcosm experiments on a coconut-fibre biofilm treatment system were carried out to evaluate wastewater treatment efficiencies in the laboratory using two wastewaters, synthetic sewage and leachate, with different pollutant loads. Three coconut-fibre conditions were set as a single bundle (low fibre density: LFD), two bundles (high fibre density: HFD), and no coconut fibre (blank). The wastewater was first circulated in the system for six weeks (circulation stage) and then discharged from the treatment tank for 7-24 weeks (treatment stage). Water quality parameters of effluents, pH, DO, EC, BOD, COD, TC, and TN, were measured at one-week intervals, and the sedimented sludge in each treatment tank was collected to determine C, N, and P contents. Results showed effective reductions in BOD and COD in the LFD and HFD conditions for the synthetic leachate, indicating that the coconut fibre contributed to the treatment of wastewater. On the other hand, the fibre density had less or no effect on the reduction of water quality parameters in the synthetic sewage. For both synthetic sewage and leachate, the C and N consumptions generally increased in the order of blank, LFD, and HFD. In particular, sludge sedimentation contributed to C consumption under the HFD condition.

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“…The preparation of synthetic sewage was adapted from data measured at Balangoda Urban Council in Sri Lanka [1] and reported data [5]. On the other hand, the preparation of synthetic sewage and leachate was adapted from reported data and previous studies with some modifications [6]- [8]. Measured water qualities of supplied synthetic sewage and synthetic leachate are shown in Table I.…”

Section: A Materialsmentioning

confidence: 99%

Coconut-Fibre Biofilm Wastewater Treatment System in Sri Lanka: Microcosm Experiments for Evaluating Wastewater Treatment Efficiencies and Oxygen Consumption

Sato¹,

Saito²,

Satoh³

et al. 2017

IJESD

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Abstract-This study evaluated the performance of a coconut-fibre biofilm wastewater treatment system (COTS) by utilizing microcosm experiments in the laboratory. In the microcosm experiments, two types of wastewater, synthetic sewage and leachate, with different pollutant loads were used. Three coconut-fibre conditions, a single bundle (low fibre density), two bundles (high fibre density), and no coconut fibre (blank) were set in the experiments. Water quality parameters (pH, DO, EC, BOD, COD, TC, TOC, TN and TP) of effluents were measured at one-week intervals, and removal % of BOD, COD, TC, TN and TP was evaluated. There was a clear increase in the oxygen consumption for the synthetic leachate with increasing the coconut fibre density. Besides, the removal % of pollutants was highly dependent on the load conditions, implying that the proper control of pollutant loads is effective to enhance the treatment efficiencies in COTS.Index Terms-Sewage, landfill leachate, coconut-fibre, biofilm treatment, microcosm experiment.

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Evolution of clog formation with time in columns permeated with synthetic landfill leachate

Cited by 79 publications

References 17 publications

Long-term hydraulic conductivity of compacted clay permeated with landfill leachates

Long-term hydraulic conductivity of compacted clay permeated with landfill leachates

Microcosm Experiments on a Coconut-Fibre Biofilm Treatment System to Evaluate Waste Water Treatment Efficiencies

Coconut-Fibre Biofilm Wastewater Treatment System in Sri Lanka: Microcosm Experiments for Evaluating Wastewater Treatment Efficiencies and Oxygen Consumption

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