Altered chemical evolution in landfill leachate post implementation of biodegradable waste diversion

Warwick, Steven; Durany-Fernandez, P.; Sapsford, Devin James; Cleall, Peter John; Harbottle, Michael John

doi:10.1177/0734242x18785723

Cited by 4 publications

(2 citation statements)

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“…In accordance with BOD 5 and BOD 5 /COD ratio (2808 mgO 2 L −1 and 0.25, respectively), the sampled RL was found to be located in-between the acetic and methanogenic phases. These values are also confirmed by Warwick et al (2018), which provided evidence of an evolution in leachate chemistry of MSW landfills occurred after the European Landfill Directive (1999). By imposing the biodegradable waste diversion from landfilling, in fact, acetogenic phase is missing in recent landfill leachates, and are now more typical of methanogenic phase leachate.…”

Section: Preparation Of Artificial Leachatesupporting

confidence: 59%

Preparation of artificial MSW leachate for treatment studies: Testing on black soldier fly larvae process

et al. 2021

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When approaching the study of new processes for leachate treatment, each influencing variable should be kept under control to better comprehend the treatment process. However, leachate quality is difficult to control as it varies dramatically from one landfill to another, and in line with landfill ageing. To overcome this problem, the present study investigated the option of preparing a reliable artificial leachate in terms of quality consistency and representativeness in simulating the composition of real municipal solid waste (MSW) leachate, in view of further investigate the recent treatment process using black soldier fly (BSF) larvae. Two recipes were used to simulate a real leachate (RL): one including chemical ingredients alone (artificial synthetic leachate-SL), and the other including chemicals mixed with artificial food waste (FW) eluate (artificial mixed leachate-ML). Research data were analysed, elaborated and discussed to assess simulation performance according to a series of parameters, such as Analytical representativeness, Treatment representativeness (in this case specific for the BSF larvae process), Recipe relevance, Repeatability and Flexibility in selectively modifying individual quality parameters. The best leachate simulation performance was achieved by the synthetic leachate, with concentration values generally ranging between 97% and 118% of the RL values. When feeding larvae with both RL and SL, similar mortality values and growth performance were observed.

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Section: Preparation Of Artificial Leachatesupporting

confidence: 59%

Preparation of artificial MSW leachate for treatment studies: Testing on black soldier fly larvae process

et al. 2021

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“…Their framework also assumes a first order bulk gas generation and degradation behaviour from the waste mass. Recent evidence has shown that different MSW components which are biodegradable exhibit variable degradation behaviour and that lignin-rich components of MSW generally do not undergo biodegradation in the landfill environment (Jayasinghe et al, 2014;Krause et al, 2016Krause et al, , 2018Muaaz-Us-Salam et al, 2017;Wang, 2015;Wang and Barlaz, 2016;Wang et al, 2011Wang et al, , 2013Wang et al, , 2015Warwick et al, 2018;Ximenes et al, 2008Ximenes et al, , 2015. Overall, their studies have provided valuable insights into the importance of coupled processes in designing bioreactor landfills for leachate recirculation and early stabilization of the waste mass.…”

Section: Implicit and Explicit Modelling Of Biogeomechanicsmentioning

confidence: 99%

The case for examining fluid flow in municipal solid waste at the pore-scale – A review

2019

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23In this paper, we discuss recent efforts from the last 20 years to describe transport in municipal 24 solid waste (MSW). We first discuss emerging themes in the field to draw the reader's attention to 25 a series of significant challenges. We then examine contributions regarding the modelling of 26 leachate flow to study transport via mechanistic and stochastic approaches, at a variety of scales. 27Since MSW is a multiphase, biogeochemically active porous medium, and with the aim of 28 providing a picture of transport phenomena in a wider context, we then discuss a selection of 29 studies on leachate flow incorporating some of the complex landfill processes (e.g. biodegradation, 30 settlement). It is clear from the literature survey that our understanding of transport phenomena 31 exhibited by landfilled waste is far from complete. Attempts to model transport have largely 32 consisted of applying representative elementary-scale models (the smallest volume which can be 33 considered representative of the entire waste mass). Due to our limited understanding of fluid flow 34 through landfilled waste, and the influence of simultaneously occurring biogeomechanical 35 processes within the waste mass, elementary-scale models have been unable to fully describe the 36 flow behaviour of MSW. Pore-scale modelling and experimental studies have proven to be a 37 promising approach to study fluid flow through complex porous media. Here, we suggest that pore-38 scale modelling and experimental work may provide valuable insights into transport phenomena 39 exhibited by MSW, which could then be used to revise elementary-scale models for improved 40 representation of field-scale problems. 41 42 43 44 4 KEYWORDS 45 municipal solid waste; modelling leachate transport; landfill; waste heterogeneity; preferential 46 flow. 47 6 2000; Rosqvist et al. , 2005) with some studies focusing on conceptual models of the pore structure 89 of MSW at the elementary scale Woodman et al., , 2015 Woodman et al., 90 2013). However, to date, our understanding of the flow of leachate, biogas and the impact of other 91 simultaneously occurring biogeochemical processes on flow and transport is incomplete, 92 especially at the pore-scale. This is particularly important to note since it is these pore-scale 93 processes, with the possibility of field-scale processes dominating particular facets at particular 94 times, that ultimately govern the overall behaviour in reactive porous media (Blunt, 2001; Blunt 95 et al., 2013;Menke et al., 2017;Xiong, 2015;Xiong et al., 2016). It is likely that processes average 96 over a wide range of different scales, which would explain the success of the widely used empirical 97 landfill gas models. The real challenge lies in the integration of modelling processes at all the 98 scales and understanding how averaging works. It is clear that one of the most difficult aspects to 99 model is the inherent heterogeneity of the waste mass, and the impact of different waste 100 components (e.g. their shapes, sizes and varyi...

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Landfill leachate treatment through the combination of genetically engineered bacteria Rhodococcus erythropolis expressing Nirs and AMO and membrane filtration processes

Bai

Tian

2020

Environmental Pollution

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Altered chemical evolution in landfill leachate post implementation of biodegradable waste diversion

Cited by 4 publications

References 22 publications

Preparation of artificial MSW leachate for treatment studies: Testing on black soldier fly larvae process

Preparation of artificial MSW leachate for treatment studies: Testing on black soldier fly larvae process

The case for examining fluid flow in municipal solid waste at the pore-scale – A review

Landfill leachate treatment through the combination of genetically engineered bacteria Rhodococcus erythropolis expressing Nirs and AMO and membrane filtration processes

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