Treatment of Contaminated Landfill Leachate using Aged Refuse Biofilter Medium

Erabee, Iqbal Khalaf; Ethaib, Saleem

doi:10.13005/ojc/340334

Cited by 22 publications

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“…The existence of large and diverse populations of microorganisms that have acclimated to high concentrations of contaminants over the years has resulted in a great capacity to degrade refractory organic matter [10,12].In addition to allowing the development of a novel and efficient treatment alternative for leachates, the extraction of AR can allow the revaluation of waste and the extension of the useful life of landfills, a very important aspect considering that the search for spaces for the construction of new sanitary landfills is not an easy task and is generally accompanied by serious social problems. Thus, when material deposited for more than 8 years at the final disposal sites is used, space is released for fresh solid wastes, favoring a more sustainable management of MSW.The AR used as packing material in bioreactors for the treatment of leachates has been reported mainly for intermediate and young leachates [11,[14][15][16], and there are few studies reported with mature leachates [17,18] and none of them with leachates of very low biodegradability. Thus, the objective of this work was to investigate the potential of AR from the landfill of the city of Tuxtla Gutierrez, Mexico, packed in a system of two bioreactors in series, for the treatment of low biodegradability leachate (BI = 0.07) from sanitary landfills.…”

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confidence: 99%

“…The AR used as packing material in bioreactors for the treatment of leachates has been reported mainly for intermediate and young leachates [11,[14][15][16], and there are few studies reported with mature leachates [17,18] and none of them with leachates of very low biodegradability. Thus, the objective of this work was to investigate the potential of AR from the landfill of the city of Tuxtla Gutierrez, Mexico, packed in a system of two bioreactors in series, for the treatment of low biodegradability leachate (BI = 0.07) from sanitary landfills.…”

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Treatment of Low Biodegradability Leachates in a Serial System of Aged Refuse-Filled Bioreactors

et al. 2019

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This paper presents a technology based on the use of aged refuse that has proven to be highly effective in the treatment of low biodegradability leachates. The tests were developed using two filled bioreactors arranged in series and operated at steady state. The aged refuse used as filling material was extracted from a city located in the southeast of Mexico and characterized by particle size, humidity, volatile solids, and volumetric weight. On the other hand, bacterial characterization made it possible to identify the presence of species related to the degradation and mineralization of organic compounds, as well as to processes of nitrification or reduction of phosphates and Cr (VI). The bioreactor system was operated under four hydraulic loads (10,20,35, and 50 L/m 3 ·d). Maximum removal efficiencies of 85, 86.1, 87.9, 98.6, 97.8, and 97.4% were achieved in COD, BOD 5 , Color, TP, TN, and N-NH 3 , respectively, complying with Mexican regulations (NOM-001- SEMARNAT-1996). The system also proved to be stable against shock loads, such as organic load fluctuations in the influent or pH variations. The results of this study show that, in countries such as Mexico, aged refuse extracted from landfills represents a promising option as a sustainable alternative for leachate treatment.Sustainability 2019, 11, 3193 2 of 16 of them are refractory and toxic, such as heavy metals. In general, the leachates can be classified as: young (less than 5 years of being generated), intermediate (between 5 and 10 years of being generated), and stabilized or mature (more than 10 years of being generated) [3].The treatment of leachates has been studied practically with all physical, chemical, and biological processes applied in the field of water treatment, highlighting processes such as adsorption, membrane systems, coagulation-flocculation, chemical oxidation, and biological systems [4]. Physicochemical processes have been applied as the first stage of purification of low biodegradability leachates, usually accompanied by biological processes to improve the efficacy of the treatment [5][6][7]. On the other hand, biological processes achieve good efficiencies when applied to young leachates, but are less effective in the treatment of mature leachates [8].In Mexico, leachates have been treated mainly by evaporation and recirculation; however, this method is not advisable because during evaporation water is emitted to the atmosphere as well as volatile organic compounds [9]. In the case of the state of Chiapas, in southeastern Mexico, due to high annual rainfalls, the generation of leachates is abundant, which causes the capacity of evaporation lagoons to be exceeded and, as a consequence, the method of evaporation and recirculation is even more questionable.A novel approach to leachate treatment consists of the use of MSW extracted from landfills after more than 8 years of being disposed on the site. This material, called stabilized material or aged refuse (AR), is used as packaging in bioreactors, generating a friendly, sustainable, ...

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Treatment of Low Biodegradability Leachates in a Serial System of Aged Refuse-Filled Bioreactors

et al. 2019

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“…The accumulation of this solid waste results in several environmental issues, safety hazards, and health issues. Furthermore, sustainable cycles can only be attained if a greater proportion of these wastes can be recycled or reused (Erabee and Ethaib 2018;Ethaib 2019). Solid waste management practices play a vital role in the promotion of greater resource recovery and sustainable development, which is achieved by recycling, reusing, and energy recovery.…”

Section: Lignocellulosic Biomassmentioning

confidence: 99%

Toward sustainable processes of pretreatment technologies of lignocellulosic biomass for enzymatic production of biofuels and chemicals: A review

Ethaib

Omar

Kamal

et al. 2020

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Lignocellulosic biomass is a class of sustainable material that can be utilized as a raw feedstock in biofuel and chemical production. However, the complex matrix structure of lignocellulosic materials complicates conversion processes, such as enzymatic hydrolysis. Therefore, an efficient pretreatment process is required to disrupt the plant cell wall structure and maximize the recovery of valuable soluble components from lignocellulosic biomass during hydrolysis. In addition, an effective pretreatment method should use the minimum necessary amounts of energy and chemicals to minimize the cost of the end product. Further, it should reduce the formation of inhibitory compounds that affect enzymes and microorganisms during hydrolysis and fermentation, and it should be applicable to a wide variety of feedstocks. The research presented in this review has highlighted the pros and cons of the current technologies employed in pretreatment processes. Further study should be done to optimize and improve these technologies to enhance the efficiency of the production of biofuels and other valuable components.

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“…However, the application of this technology has focused mainly on the treatment of leachate from sanitary landfills [16], where COD removal of 75-95% has been achieved with a hydraulic load (HL) of 55 L/m 3 •d [17], or 80% with a HL of 18 L/m 3 •d [14]. The ARFB has also been tested in less complex wastewater, such as domestic wastewater with COD removals of 73.8% [18].…”

Section: Introductionmentioning

confidence: 99%

Novel Treatment of Sugar Mill Wastewater in a Coupled System of Aged Refuse Filled Bioreactors (ARFB): Full-Scale

et al. 2021

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Sugar is the most important food supplement of our daily diet. During the production, sugar mills use a large volume of water and produce a significant amount of wastewater polluted with high organic compounds. Therefore, it is necessary to treat the wastewater before their disposal. For this reason, this article presents the results obtained from the monitoring of a coupled system of aged refuse filled bioreactors (ARFB) in full scale to treat wastewater from a sugar mill. The coupled system consists of two bioreactors (a primary one -ARFB1- and a rectification one -ARFB2-) arranged in a series with identical geometries. The ARFB1-ARFB2 system was evaluated in two stages. The first stage (maintenance period) for 28 weeks, and second stage (Zafra season) for 29 weeks. The system was fed with sugar mill wastewater (SMW) with a chemical oxygen demand (COD) of 2787 ± 1552 mg/L and 2601 ± 722 mg/L, respectively. As results, we observed a rapid stabilization of the system over 2 months. In addition, we found the ARFB1-ARFB2 system achieved an average COD removal of 94.9%, with a final effluent (E2) concentration below the maximum permissible limits of Mexican and international regulations for all analyzed parameters. Finally, the results of this study show that the ARFB1-ARFB2 full-scale novel technology is an efficient process for removal of the main contaminants that affect the wastewater from the sugar mills.

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Treatment of Contaminated Landfill Leachate using Aged Refuse Biofilter Medium

Cited by 22 publications

References 1 publication

Treatment of Low Biodegradability Leachates in a Serial System of Aged Refuse-Filled Bioreactors

Treatment of Low Biodegradability Leachates in a Serial System of Aged Refuse-Filled Bioreactors

Toward sustainable processes of pretreatment technologies of lignocellulosic biomass for enzymatic production of biofuels and chemicals: A review

Novel Treatment of Sugar Mill Wastewater in a Coupled System of Aged Refuse Filled Bioreactors (ARFB): Full-Scale

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