Post-Treatment of Composting Leachate by Ozonation

Mokhtarani, Nader; Nasiri, Ali; Ganjidoust, Hossein; Yasrobi, S. Yashar

doi:10.1080/01919512.2014.904737

Cited by 10 publications

(6 citation statements)

References 32 publications

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“…O 3 is a widely used oxidant in wastewater treatment. Mokhtarani et al (2014) and Soubh and Mokhtarani (2016) studied the single ozonation process in the post-treatment of low COD (\ 1 g/L) treated composting leachate. COD removals were similar in both studies (51 and 40%) (Mokhtarani et al Mokhtarani et al (2014) despite the fact that they were using similar reactors.…”

Section: Aops For the Post-treatment Of Biologicallytreated Compostinmentioning

confidence: 99%

“…Mokhtarani et al (2014) and Soubh and Mokhtarani (2016) studied the single ozonation process in the post-treatment of low COD (\ 1 g/L) treated composting leachate. COD removals were similar in both studies (51 and 40%) (Mokhtarani et al Mokhtarani et al (2014) despite the fact that they were using similar reactors. In order to improve the COD removal, Soubh and Mokhtarani (2016) also tested the combination of O 3 /persulfate (Soubh and Mokhtarani 2016).…”

Section: Aops For the Post-treatment Of Biologicallytreated Compostinmentioning

confidence: 99%

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Composting leachate: characterization, treatment, and future perspectives

Roy

Azaïs

Benkaraache

et al. 2018

Rev Environ Sci Biotechnol

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The increasing production of waste has led to one of the major environmental challenges of today: waste management. A solution to this problem is the composting of organic wastes. While the composting process transforms organic wastes into biologically stable compost, large amounts of highly contaminated leachates that present a direct risk to the environment are also produced. First off, this review discusses the origin and nature of contaminants found in composting leachates. In a general perspective, composting leachates are characterized by the presence of high concentrations of moderately biodegradable organic matter and nutrients and contain toxic pollutants such as heavy metals and plasticizers. Treatment technologies that have been studied are subsequently reported and discussed (treatment efficiencies and operating costs). This review highlights the lack of available solutions to efficiently remove all contaminants found in these leachates, which is a major concern considering the increasing number of composting facilities. While both, membrane bioreactors and reverse osmosis, show promising results with NH 4 , COD and TSS removals of [ 70, [ 85 and [ 99.9%, respectively, the resulting effluent remains hazardous for the environment. Further studies are required to assess the use of a combination of biological and advanced oxidation process for the production of a safely disposable effluent.

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Section: Aops For the Post-treatment Of Biologicallytreated Compostinmentioning

confidence: 99%

Section: Aops For the Post-treatment Of Biologicallytreated Compostinmentioning

confidence: 99%

Composting leachate: characterization, treatment, and future perspectives

Roy

Azaïs

Benkaraache

et al. 2018

Rev Environ Sci Biotechnol

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show abstract

“…Literature review showed that the main problem of the composting process is a lenght of its stabilization phase. Previous studies conducted in the world related to the use of ozone in the composting process, were focused on the disposal of leachate [21,22]. Due to the lacks in research and data in the literature, which regards to possibilities of shortening phase of aerobic stabilization, it was decided to investigate whether it is possible to use ozone as a substance, which affects both the additional hygienization of the material and acceleration of stabilization in composting process.…”

Section: Introductionmentioning

confidence: 99%

Ozone aeration impact on the maturation phase in the process of green waste composting

2018

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The paper presents work results on optimization of stabilization phase in the biomass composting process. In these studies, it was examined the influence of two doses of ozone (10 and 20 mgO3·dm-3) in the air used for aeration of stabilization. The results showed the ability to reduce compost maturation time by more than 50%. Application of these ozone doses resulted in a reduction of organic matter content in the stabilizer by 30 to 60%, while reduction of moisture in the material by 20%.

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“…Some studies reported the treatment of leachate by means of unconventional processes such as ozonation, [11][12][13][14] Fenton reaction, [14][15][16][17] catalytic photo-oxidation, [13,[18][19][20] and membrane processes. [21][22][23][24][25] Nevertheless, the complex nature of the leachate generated in landfills is an impeditive factor in applying the cited techniques for its handling.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies reported the treatment of leachate by means of unconventional processes such as ozonation, Fenton reaction, catalytic photo‐oxidation, and membrane processes …”

Section: Introductionmentioning

confidence: 99%

Leachate treatment using supercritical water

et al. 2017

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This work reports new experimental data for the oxidation degradation of landfill leachate using supercritical water treatment (ScWO) without addition of any oxidants. The treatment reduced significantly the original concentration of pollutant compounds in the liquid waste. The parameters used to evaluate the efficiency of the treatment (and leachate degradation) were chemical oxygen demand (COD), total organic carbon (TOC), turbidity, colour, and absorbance. The experiments were conducted using a continuous flow reactor built in Inconel 625. The degradation oxidation reactions were carried out using temperature between 350 and 600 °C (for COD intial concentrations of 1580 mg · L−1) and between 450 and 700 °C (for COD intial concentrations of 2000 mg · L−1), pressures of 15 and 22.5 MPa, feed streams of 6 and 12 g · min−1, and reaction operation time of 40 min. Increasing pressure improved degradation of organic pollutant compounds, whereas the increase of the feed flow rate did not show any positive effect on the performance of the treatment. However, the most important factor on the degradation of leachate was temperature; increasing temperature from 350 to 600 °C reduced COD level in 31.3 and 34.4 % for 15 and 22.5 MPa, respectively. Hydrogen was the gas produced in the highest amount for all the experimental conditions studied. The results suggested that supercritical water is a promising technique to treat leachate and consequently reduce its pollutant capacity. Thus, the data presented here can be used as a basis for future studies.

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Post-Treatment of Composting Leachate by Ozonation

Cited by 10 publications

References 32 publications

Composting leachate: characterization, treatment, and future perspectives

Composting leachate: characterization, treatment, and future perspectives

Ozone aeration impact on the maturation phase in the process of green waste composting

Leachate treatment using supercritical water

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