Activated sludge microbial communities and hydrolytic potential in a full-scale SBR system treating landfill leachate

Remmas, Nikolaos; Manfe, Nicola; Raga, Roberto; Akratos, Christos S.

doi:10.1080/10934529.2022.2110478

Cited by 6 publications

(2 citation statements)

References 53 publications

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“…However, in the case of increased presence of inorganic nitrogen content, the ability of the process to effectively treat landfill leachate is limited. For influent ammonia concentration of 1.3 g/L in mature landfill leachate, the efficiency of a full-scale SBR system was slightly over 70% [121], whereas the COD removal efficiency for intermediate and mature landfill leachate in full-scale SBR systems ranged between 40 and 45% [79,122].…”

Section: Biological Systems and Factors Influencing The Biotreament O...mentioning

confidence: 96%

“…A shift in the microbial composition was observed, determining greater proportion of 3-hydroxy and cyclopropane fatty acids [78]. Phosphate concentration can also be a limiting factor affecting activated sludge microbiota [79]. Moreover, activated sludge microbiota appeared to produce more exopolymeric substances (EPS) as a protective mechanism against landfill leachate toxicity [80].…”

Section: Landfill Leachate Toxicity On Activated Sludge Microbiotamentioning

confidence: 99%

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A Critical Review on the Microbial Ecology of Landfill Leachate Treatment Systems

et al. 2023

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Sanitary landfilling is still considered worldwide as one of the most common methods applied for the management of the municipal solid waste. As a consequence, vast amounts of landfill leachate are generated annually, which are characterized by variability in physicochemical composition, owing to the stabilization process that occurs over the years. However, sustainable management of landfill leachate is a challenging issue, due to diverse chemical composition and high concentration in heavy metals and xenobiotics. Despite the fact that several studies have been reported on the biotreatment of landfill leachate, only in recent years has the microbial composition in such systems have been examined. In the present review, the key role of the microbial ecology involved in depurification and detoxification of landfill leachate in activated sludge and anaerobic systems is interpreted and ecological considerations influencing landfill leachate treatment are stated. Apart from the assessment of landfill toxicity on certain model organisms, this work provides an extensive overview on microbial communities performing key biological processes during landfill leachate treatment, including nitrification-denitrification, anammox and anaerobic digestion. Moreover, microbial aspects affecting nutrient removal efficiency in such biosystems are discussed.

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Section: Biological Systems and Factors Influencing The Biotreament O...mentioning

confidence: 96%

Section: Landfill Leachate Toxicity On Activated Sludge Microbiotamentioning

confidence: 99%

A Critical Review on the Microbial Ecology of Landfill Leachate Treatment Systems

et al. 2023

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Optimizing nitrogenous organic wastewater treatment through integration of organic capture, anaerobic digestion, and anammox technologies: sustainability and challenges

Huang

Wang

Zhang

et al. 2023

Environ Sci Pollut Res

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Leachate management in medium- and small-sized sanitary landfills: a Greek case study

Koutsou,

Mandylas,

Fountoulakis

et al. 2023

Environ Sci Pollut Res

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The sustainable management of landfill leachates remains a matter of important concern in many countries. We used as case study a medium-sized Greek landfill, and we initially investigated the performance of the existing secondary leachate treatment system. The activated sludge process removed chemical oxygen demand (COD), biochemical oxygen demand (BOD), NH4-N, and PO4-P by 55%, 84%, 94%, and 14%, respectively, but the effluents did not meet the legislation requirements for discharge or reuse. Afterwards, different management options of these effluents (co-treatment with sewage in the centralized treatment plant, onsite tertiary treatment with reverse osmosis, granular activated carbon (GAC), ozonation, photo-Fenton, or constructed wetlands) were evaluated regarding their operational costs and environmental footprint. The use of constructed wetlands presented the lower operational cost, energy requirements, and greenhouse gas (GHG) emissions, not exceeding 21.5 kg CO2eq/day. On the other hand, the power consumption and the GHG emissions of the other on-site technologies ranged from 0.37 kWh/m3 and 5.56 kg CO2eq/day (use of GAC) to 39.19 kWh/m3 and 588.6 kg CO2eq/day (use of ozonation), respectively. The co-treatment of the leachates with municipal wastewater required 0.6 kWh/m3 and emitted 30.18 kg CO2eq/day. For achieving zero-discharge of the treated leachates, a system consisting of constructed wetlands and evaporation ponds in series was designed.

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Activated sludge microbial communities and hydrolytic potential in a full-scale SBR system treating landfill leachate

Cited by 6 publications

References 53 publications

A Critical Review on the Microbial Ecology of Landfill Leachate Treatment Systems

A Critical Review on the Microbial Ecology of Landfill Leachate Treatment Systems

Optimizing nitrogenous organic wastewater treatment through integration of organic capture, anaerobic digestion, and anammox technologies: sustainability and challenges

Leachate management in medium- and small-sized sanitary landfills: a Greek case study

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