Application of Anaerobic and Ozonation Processes in the Landfill Leachate Treatment

The optimization of leachate treatment was investigated as well as the configuration of a biological-ozonation process. The leachate used for the experiments was diluted to 1/5 with tap water and treated anaerobically. The anaerobic effluent and the raw leachate were treated with ozone in order to increase their biodegradability getting the minimum organic matter removal. Both were submitted to the ozonation process, applying a constant ozone dose and varying the contact time. The ozonation of raw leachate produced a decrease of COD and BOD5 concentrations as well as BOD5/COD ratios, applying an ozone dose of 38.72 mg/L·min and contact times between 15 and 60 minutes. Ozonation as a pre-treatment process to the biological system did not improve the biodegradability of the raw leachate. The anaerobic effluent from the reactor fed with leachate diluted to 1/5, was subjected to an ozone dose of 34.99 mg/L·min and applying different contact times. BODf values increased from 74.75 up to 1220 mg/L and BODf/COD ratios reached values higher than 1. Then, the application of ozone to the anaerobic effluent led to the improvement of the biodegradability of the leachate as well as the BODf/COD ratio for all the contact times used.

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Removal of phthalic acid dieters with dissolved organic matter by an anaerobic/anoxic/oxic leachate treatment process

RSC Advances ◽

10.1039/c9ra08323e ◽

2019 ◽

Vol 9 (66) ◽

pp. 38807-38813

Author(s):

Chengran Fang ◽

Hongzhi Mao ◽

Yuyang Long

Keyword(s):

Organic Matter ◽

Dissolved Organic Matter ◽

Landfill Leachate ◽

Phthalic Acid ◽

Treatment Process ◽

Laboratory Scale ◽

Leachate Treatment ◽

Butyl Phthalate ◽

Ethylhexyl Phthalate

The removal of di-n-butyl phthalate (DBP) and di(2-ethylhexyl) phthalate (DEHP) with dissolved organic matter (DOM) was studied in a laboratory scale anaerobic/anoxic/oxic reactor for landfill leachate treatment.

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Degradation of refractory organic matter in the effluent from a semi-aerobic aged refuse biofilter-treated landfill leachate by a nano-Fe3O4 enhanced ozonation process

Waste Management & Research ◽

10.1177/0734242x211066229 ◽

2021 ◽

pp. 0734242X2110662

Author(s):

Yuyu Huang

Keyword(s):

Organic Matter ◽

Influencing Factors ◽

Landfill Leachate ◽

Electrical Energy ◽

Effluent Treatment ◽

Leachate Treatment ◽

Refractory Organic Matter ◽

Aged Refuse ◽

Initial Ph ◽

Ozonation Process

In this study, the transformation and degradation mechanisms of refractory organic matter in biologically treated leachate from a semi-aerobic aged refuse biofilter (SAARB) in a nano-Fe3O4 enhanced ozonation process (nFe3O4-O3) were investigated in batch experiments. A continuous experiment then confirmed the effectiveness of the process for SAARB effluent treatment. In a batch experiment, the effects of influencing factors, including nFe3O4 dosage, O3 dosage and initial pH on the treatment performance of nFe3O4-O3 process, were comprehensively investigated. The results showed that when the nFe3O4 dosage = 6 g L−1, O3 dosage = 0.15 L minute−1 and initial pH = 7, the total organic carbon, absorbance at 254 nm and colour number removal efficiencies were 40.58%, 62.55% and 89.80%, respectively. In addition, most of the humic- and fulvic-like substances in the SAARB effluent were removed, and the condensation degree, aromaticity and humification degree of the organics were substantially reduced. The morphology and elemental valence state analysis showed that the nFe3O4 in the process was relatively stable and could form an nFe3O4-organic complex. Therefore, the probability of organics reacting with hydroxyl radical increased and the oxidation efficiency was enhanced. In the continuous experiment, both the O3 dosage and hydraulic retention time (HRT) were the key influencing factors. The treatment efficiency of the nFe3O4-O3 process was enhanced at a higher O3 dosage and longer HRT. The electrical energy consumption of the continuous nFe3O3-O3 process was calculated to be 17.72 kW h m−3 in SAARB effluent treatment. This study proved the feasibility of biologically treated landfill leachate treatment by the nFe3O3-O3 process.

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Removal of Pollutants in Different Landfill Leachate Treatment Processes on the Basis of Organic Matter Fractionation

Journal of Environmental Quality ◽

10.2134/jeq2017.09.0360 ◽

2018 ◽

Vol 47 (2) ◽

pp. 297-305 ◽

Cited By ~ 2

Author(s):

Mehdi Zolfaghari ◽

Oumar Dia ◽

Nouha Klai ◽

Patrick Drogui ◽

Satinder Kaur Brar ◽

...

Keyword(s):

Organic Matter ◽

Landfill Leachate ◽

Leachate Treatment ◽

Treatment Processes ◽

Organic Matter Fractionation

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Use of dairy reject and fermented Aleo sp. Leaf Gel mixture in the biological Pre-treatment of landfill leachate

Water Practice & Technology ◽

10.2166/wpt.2018.032 ◽

2018 ◽

Vol 13 (1) ◽

pp. 219-228 ◽

Cited By ~ 1

Author(s):

Kasmi Mariam ◽

Elleuch Lobna ◽

Abidi Haifa ◽

Cherni Yassmine ◽

Hosni Cyrine ◽

...

Keyword(s):

Saccharomyces Cerevisiae ◽

Organic Matter ◽

Size Effect ◽

Landfill Leachate ◽

Yeast Strain ◽

Oxygen Demand ◽

Treatment Efficiency ◽

Chemical Oxygen Demand Removal ◽

Pre Treatment ◽

Aloe Gel

Abstract In this study the biotreatability of Jebel Chakir landfill leachate (Tunisia) using a mixture of dairy industry reject (bactofugate) and Aloe sp. leaf gel was evaluated. The effect of Aloe gel fermentation using Saccharomyces cerevisiae yeast strain was investigated against some selected bacterial and fungal strains. The inoculation size effect of the treatment mixtures (2, 6, 10 and 12%) in the treatment efficiency was also studied. The obtained results showed that when natural Aloe gel and bactofugate mixtures were used the recorded chemical oxygen demand removal rates exceeded 56% within 48 h of treatment. Whereas, the use of the fermented Aloe gel in the treatment mixtures has promoted the organic matter removal to reach 72%.

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Optimization of ozonation process for organic matter and ecotoxicity removal from landfill leachate by applying rotatable central composite design (RCCD)

Journal of Environmental Science and Health Part A ◽

10.1080/10934529.2021.2006543 ◽

2021 ◽

pp. 1-14

Author(s):

Heloisa B. Bastos ◽

Larissa L. S. Silva ◽

Érika C. A. N. Chrisman ◽

Fabiana V. Fonseca ◽

Juacyara C. Campos

Keyword(s):

Organic Matter ◽

Central Composite Design ◽

Landfill Leachate ◽

Central Composite ◽

Ozonation Process

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Integrated Leachate Treatment Technology

Waste Management ◽

10.4018/978-1-7998-1210-4.ch009 ◽

2020 ◽

pp. 204-220

Author(s):

Zawawi Daud ◽

Halizah Awang

Keyword(s):

Organic Compounds ◽

Landfill Leachate ◽

Combined Treatment ◽

Treatment Technology ◽

Leachate Treatment ◽

Chemical Treatments ◽

Physico Chemical ◽

Effective Removal ◽

Removal Of Heavy Metals ◽

Pre Treatment

In this chapter, the performance of combined treatment of municipal landfill leachate is reviewed. Although individual physico-chemical treatments are suitable for the removal of heavy metals and hydrolyzation of some organic compounds, a combination of two physico-chemical treatments or physico-chemical and biological is required for optimum treatment of stabilized landfill leachate. A combination of two physico-chemical treatments can give optimum results in removal of recalcitrant organic compounds from stabilized leachate, as reflected by a significant decrease of the COD values after treatment. On the other hand, a combination of physico-chemical and biological treatments is required to achieve effective removal of NH3-N and COD with a substantial amount of biodegradable organic matter. In many cases, physico-chemical treatments are suitable for pre-treatment of stabilized leachate. The objective of this paper is to highlight various types of integrated leachate treatments as it has been difficult to get optimum efficiency from single approached treatment.

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Fate and removal of aromatic organic matter upon a combined leachate treatment process

Chemical Engineering Journal ◽

10.1016/j.cej.2020.126157 ◽

2020 ◽

Vol 401 ◽

pp. 126157 ◽

Cited By ~ 2

Author(s):

Min-Da Yu ◽

Bei-Dou Xi ◽

Zong-Qiang Zhu ◽

Li Zhang ◽

Chao Yang ◽

...

Keyword(s):

Organic Matter ◽

Treatment Process ◽

Leachate Treatment

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Raw landfill leachate treatment using an electrocoagulation process with a novel rotating electrode reactor

Water Science & Technology ◽

10.2166/wst.2019.289 ◽

2019 ◽

Vol 80 (3) ◽

pp. 458-465 ◽

Cited By ~ 3

Author(s):

Ahmed Samir Naje ◽

Mohammed A. Ajeel ◽

Isam Mohamad Ali ◽

Hussein A. M. Al-Zubaidi ◽

Peter Adeniyi Alaba

Keyword(s):

Landfill Leachate ◽

Suspended Solids ◽

Treatment Process ◽

Oxygen Demand ◽

Neutral Medium ◽

Leachate Treatment ◽

Rotating Speed ◽

Electrode Distance ◽

Treatment Performance ◽

Electrocoagulation Process

Abstract In this work, landfill leachate treatment by electrocoagulation process with a novel rotating anode reactor was studied. The influence of rotating anode speed on the removal efficiency of chemical oxygen demand (COD), total dissolved solids (TDS), and total suspended solids (TSS) of raw landfill leachate was investigated. The influence of operating parameters like leachate pH, leachate temperature, current, and inter-distance between the cathode rings and anode impellers on the electrocoagulation performance were also investigated. The results revealed the optimum rotating speed is 150 rpm and increasing the rotating speed above this value led to reducing process performance. The leachate electrocoagulation treatment process favors the neutral medium and the treatment performance increases with increasing current intensity. Furthermore, the electrocoagulation treatment performance improves with increasing leachate temperature. However, the performance reduces with increasing inter-electrode distance.

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A study on municipal leachate treatment through a combination of biological processes and ozonation

MATEC Web of Conferences ◽

10.1051/matecconf/201927606030 ◽

2019 ◽

Vol 276 ◽

pp. 06030 ◽

Cited By ~ 1

Author(s):

Iva Yenis Septiariva ◽

Tri Padmi ◽

Enri Damanhuri ◽

Qomarudin Helmy

Keyword(s):

Treatment Process ◽

Biological Process ◽

Cod Removal ◽

Batch Reactors ◽

Biological Processes ◽

Solid Waste Disposal ◽

Leachate Treatment ◽

Pre Treatment ◽

Aerobic And Anaerobic ◽

Post Treatment Process

Landfill is the most commonly method of municipal solid waste disposal in many countries. This practice has great potential to produce highly polluted leachate in massive quantities, which can cause environmental contamination. Biological processes are known as a common method to treat municipal leachate however this process alone in is less effective, especially in reducing the concentration of organic pollutants (BOD5/COD ratio). Leachate properties are site-specific and greatly influenced by landfill age. This study focuses on the investigation of treatment methods that can increase the extent of leachate biodegradability by applying an ozone concentration of 2.5 mg/L with up to 360 minutes of contact time. In this study, batch reactors were used and operated in anaerobic and aerobic conditions. The leachate used here represents both young and old leachate. Several treatment combinations were compared: Variation I (a combination of biologically aerobic and anaerobic process), Variation II (ozonation included as a pre-treatment process), and Variation III (ozonation was included as a post-treatment process). The results suggest that the BOD5/COD ratios of young and old leachates were 0.58 and 0.21, respectively. The COD removal for a young and old leachate treatment by biological process alone was 96.8% and 50.8%, respectively. Meanwhile, a combination of anaerobic-ozonation-aerobic processes gave better COD removal. Ozonation had a significant effect on the old leachate treatment, where the COD removal rose from 50.8% to 75%. Ozonation is a type of technology that can be applied to a subsequence treatment of biological processes in order to elevate the COD removal efficiency.

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