Reverse osmosis treatment system for landfill leachate: Operation conditions, advantages and challenges

TOPAL, Aysun Derya; Atasoy, Ayse Dilek

doi:10.35208/ert.1027553

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…Similar to saturated compounds, most of the macromolecular dissolved organic compounds were eliminated by the procedure; nonetheless, they might be harmful to the environment. Using RO to treat leachate resulted in the removal of 98% of COD, 99% of total nitrogen, 99% of suspended particles, 94% of oil or grease, and 94% of colour and heavy metals, according to a study by [72].The system's newly integrated sand filter, which also contributes to extending the life of the RO, determines the quantity of leachate present. According to the report, obstacles to the RO treatment system include high energy consumption, a brief lifetime, and membrane maintenance.…”

Section: Reverse Osmosismentioning

confidence: 99%

Landfill Leachate: Review of various treatment approaches

Lokesh Sapkota,

Rajendra Joshi,

Anish Ghimire

et al. 2023

Jnl Innov. Engin. Educ.

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The burning issue of Solid waste management has become more prevalent in municipals of emerging nations as a combined effort of population growth, economic expansion, and rising living standards. In Nepal, 48.6% of municipalities choose to pile rubbish in landfills, while the remaining municipalities choose to burn their waste or pile it up along rivers. Leachate, a hazardous pollutant that harms soil, ground and surface water, human health, hygiene, and aquatic life, is a liquid produced from the bottom of solid waste disposal facilities.Leachate is treated via three processes: physical, chemical, and biological in landfills. The goal of the current paper is to review the leachate treatment options currently on the market. Instead of adopting a single treatment procedure, with physical and chemical process in combination of biological treatment has shown the effective performance. The onsite leachate solution is given an appropriate low cost option via land treatment of the landfill leachate. Cover soil can be thought of as a primary component of landfill operating strategy for separating trash from the environment and employed as a medium for the reduction of organic loads and specific toxic metals in leachate. This paper will be helpful in examining the many alternatives for treating landfill leachate.

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Section: Reverse Osmosismentioning

confidence: 99%

Landfill Leachate: Review of various treatment approaches

Lokesh Sapkota,

Rajendra Joshi,

Anish Ghimire

et al. 2023

Jnl Innov. Engin. Educ.

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“…A major part of the required power is used for aeration of the mixed liquor in aerobic tanks [20]. As regards RO treatment, the predominant source of energy consumption is the high-pressure membrane process [21], while operation of the evaporators requires significant amounts of energy to heat the treated liquids [22]. Despite the importance of energy consumption in the operational costs of Leachate Treatment Plants (LTPs), limited relevant information based on full-scale systems is available in the literature.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Operation of a Full-Scale Sequencing Batch Reactor–Reverse Osmosis–Evaporation System Used to Treat Landfill Leachates: Removal of Pollutants, Energy Consumption and Greenhouse Gas Emissions

Tsompanoglou,

Koutsou,

Stasinakis

2023

Energies

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Limited information is available in the literature regarding the energy consumption and the greenhouse gases emitted during landfill leachates treatment. A full-scale landfill leachates treatment system that included primary sedimentation, biological treatment in sequencing batch reactors, reverse osmosis and mechanical vapor recompression evaporation was monitored and evaluated for the removal of major pollutants, energy consumption and greenhouse gas emissions. Samples were taken during a period of two years from different points of the system, while the actual power consumption was calculated considering the available mechanical equipment and the hours of operation. The quantities of greenhouse gases emitted were estimated using appropriate equations and based on the operational characteristics of the system. According to chemical analyses, biological treatment resulted in partial removal of COD and total nitrogen, while the removal of BOD5 and NH4-N was significant, reaching 90 and 98%, respectively. Use of reverse osmosis increased the removal of all pollutants, satisfying the requirements of the legislation on wastewater discharge into the environment. Power consumption was calculated to be 35.3 KWhr per m3 of treated leachate, while mechanical vapor recompression evaporation was responsible for 60.5% of the total energy required. The contribution of other processes to energy consumption was as follows, in decreasing order: sequencing batch reactors > reverse osmosis > primary treatment. The roots blower vacuum pump used for mechanical vapor recompression evaporation, and the blowers providing air to the sequencing batch reactors, were the most energy-intensive pieces of apparatus, contributing 44.2% and 11.3% of the required energy, respectively. The quantity of greenhouse gases emitted was estimated to be 27.7 Kg CO2eq per m3 of treated leachates. Among the different processes used, biological treatment and mechanical vapor recompression evaporation contributed to 45.7% and 44.1% of the total emissions, respectively. The findings of this study reveal that an integrated landfill leachate treatment system that combines biological treatment and reverse osmosis can assure the protection of the aquatic environment by producing high-quality effluent; however, further research should be conducted regarding the sustainable management of reverse osmosis concentrate. Mechanical vapor recompression evaporation contributes significantly to the environmental footprint of the landfill leachates treatment system due to both high energy consumption and elevated emissions of greenhouse gases.

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“…Leachate from landfills also contains complicated organic characteristics as BOD, COD, and pH. Since these organics are less biodegradable and selectively detrimental to biological systems, higher concentrations provide larger challenges [11]. The proper treatment of landfill leachate prior to its discharge into any water body is essential for preventing environmental degradation.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Leachate by Phytoremediation technique using Marigold and Colocasia Plants

Nerlekar,

Bhange,

Belge

et al. 2023

E3S Web of Conf.

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Treatment of leachate is an important aspect in solid waste management and treatment system. A sustainable and economical method called phytoremediation makes use of plants to remove, degrade, or stabilize contaminants from polluted wastewater. In this work, the phytoextraction of zinc and copper from landfill leachate by Marigold and Colocasia plant is carried out. The efficiency of Marigold and Colocasia in the treatment of leachate is examined in this study. The findings demonstrated that plants greatly lowered the level of heavy metals in the landfill leachate. Marigold and Colocasia plants have a removal effectiveness of more than 95% for zinc in landfill leachate, with copper having the highest value at 44%. Both the chemical and biological oxygen demands (COD and BOD) are reduced by 87% and 67%, respectively. The average removal of pollutants is found to be 64%, 95% and 33% for total hardness, turbidity and pH for Marigold plant and 65%, 98% and 29% for total hardness, turbidity and pH for Colocasia plant.

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Reverse osmosis treatment system for landfill leachate: Operation conditions, advantages and challenges

Cited by 5 publications

References 21 publications

Landfill Leachate: Review of various treatment approaches

Landfill Leachate: Review of various treatment approaches

Evaluating the Operation of a Full-Scale Sequencing Batch Reactor–Reverse Osmosis–Evaporation System Used to Treat Landfill Leachates: Removal of Pollutants, Energy Consumption and Greenhouse Gas Emissions

Treatment of Leachate by Phytoremediation technique using Marigold and Colocasia Plants

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