The Application of Mineral Sorbents to Remove Volatile Organic Compounds from the Gases Emitted from the Composting Processes

Wierzbińska, Monika

doi:10.12911/22998993/130888

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…Another way to optimize the greenhouse gas (GHG) emissions from the process is to prepare optimal compositions of the mixtures for biological processing, e.g. by adding natural structural materials, the so-called bulking agents (Malińska and Zabochnicka-Świątek, 2013;Tom et al 2016; Neugebauer and Sołowiej 2017), sawdust (Maxianová and Vaverková, 2021), mineral sorbents (Wierzbińska, 2021) or digestate (Malinowski et al 2021). The applied additives are designed to change the C/N ratio, bulk density (BD) and air-filled porosity (AFP) of the treated waste, which should result in a better oxygen distribution and prevent the formation of anaerobic zones in the treated waste.…”

Section: Introductionmentioning

confidence: 99%

Impact of Air-Flow Rate and Biochar Addition on the Oxygen Concentration in Waste and Emitted Gases During Biostabilization of Undersized Fraction from Municipal Solid Waste

Malinowski¹

2021

J. Ecol. Eng.

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Mechanical biological treatment of waste is still one of the most popular methods for mixed municipal waste treatment. The result of mechanical processing of waste is sorting out: the undersized fraction from municipal solid waste (UFMSW) with granulation below 80 mm, rich in biodegradable organic waste (mainly including food waste, paper, wood, etc.). UFMSW is treated in biological processes in order to reduce the negative environmental effect of this waste. Unfortunately, the processing is not neutral to the environment. The correct course of the aerobic biostabilization process depends on the activity of microorganisms, the intensity of aeration, and the oxygen content in the processed waste. The aim of this paper was to analyze the effect of air-flow rate and biochar addition on the oxygen concentration in waste and in emitted gases during the intensive phase of UFMSW biostabilization. The study was performed under laboratory conditions. Six different variants of the process (without biochar addition and using 1.5; 3; 5; 10 and 20% of biochar addition) were applied. Subsequent replicates were conducted using an averaged air-flow rate of 0.1, 0.2, and 0.4 m 3. d -1. kg dm.org -1 . As a result of the conducted experiments, it was found that both the air-flow rate and the addition of biochar have a significant effect on the oxygen concentration in the treatment waste, as well as its content in the outlet air. Using the highest air-flow rate resulted in the oxygen content not decreasing below 14%, both in the free spaces between the waste and in the emitted gases, while the addition of biochar significantly reduced the oxygen concentration. In the case of lower air-flow rate values, the oxygen content decreased even below 5%. It was found that a high addition of biochar (10 and 20% by weight) at the lowest air-flow rate resulted in the occurrence of anaerobic zones in waste in the first days of the intensive process (between days 2 and 6 of the process), as well as absence of oxygen in the outlet air (between days 2 and 4 of the process). Despite this, no methane (biogas) emissions were found in any of the conducted experiments.

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Section: Introductionmentioning

confidence: 99%

Impact of Air-Flow Rate and Biochar Addition on the Oxygen Concentration in Waste and Emitted Gases During Biostabilization of Undersized Fraction from Municipal Solid Waste

Malinowski¹

2021

J. Ecol. Eng.

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“…To maintain high efficiency of this process, optimum gas and bed conditions as well as operating parameters must be maintained. The pollutants diffuse into the liquid coating that covers the sorbent, the socalled biolayer or biofilm, where they are broken down by the microorganisms and their enzymes to carbon dioxide and water which are discharged into the atmosphere as harmless and non-toxic [Wierzbińska 2021a[Wierzbińska , 2021bSchmidt at al. 2020].…”

Section: Introductionmentioning

confidence: 99%

Deodorisation of Industrial Gases Using a Biofiltration Plant

Wierzbińska

2023

J. Ecol. Eng.

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This paper proposes the use of natural fibres: cotton, hemp and jute, as an additive to the fillings in peat-bark biofilters used to deodorise industrial gases in order to increase the sorption properties of the biomass used. The subject of the studies involved waste gases from a grease trap, which were passed through biofilters to remove volatile fatty acids (VFAs) from them that are responsible for the odour nuisance of these gases. It was assumed that a set of microorganisms would be established on the biological material through a process of natural selection to convert the readily decomposable fatty acids into carbon dioxide and water. Gases were sampled upstream and downstream of the beds as well as analysed qualitatively and quantitatively on a gas chromatograph. On the basis of the changes in volatile fatty acid concentrations, the efficiency of the deodorisation process was evaluated. The deodorisation results were compared between the individual beds at the unstable stage of those beds filtration, i.e. during the period of biofilters activation and during their stable filtration. For each bed, the efficiency during each week of filtration was calculated. The efficiencies of removal of individual fatty acids from the waste gases were also compared. The studies show that a 3-month filtration period of the biofilter is sufficient for the biological bed to begin to effectively perform its function as a deodoriser of waste gases under industrial conditions. This period was characterised by considerable turbulence and activation of both the filter material and the microorganisms in the bed. During the first weeks of activation, the beds described in this paper showed relatively low deodorisation efficiencies (33-58%). In the next phase, there was an increase in flow resistance and a partial decrease in treatment effects to 32-47%. After that, there were fluctuations in deodorisation efficiency for several weeks until the microflora was established and adapted. During this period, the peat-bark bed had the best efficiency amounting to 70-80%. After 9 weeks, the beds were already partially activated, the microorganisms were moving towards equilibrium and the deodorisation efficiency with fibre beds was above 80%. After 15 weeks of filtration, the already activated biofilters reached efficiencies of over 90% and even 95% in the case of cotton.

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Study of carbon materials using X-ray diffraction method, qualitative and quantitative analysis of adsorption

Ulrikh,

Babich,

Ivanova

et al. 2024

Microchemical Journal

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The Application of Mineral Sorbents to Remove Volatile Organic Compounds from the Gases Emitted from the Composting Processes

Cited by 4 publications

References 3 publications

Impact of Air-Flow Rate and Biochar Addition on the Oxygen Concentration in Waste and Emitted Gases During Biostabilization of Undersized Fraction from Municipal Solid Waste

Impact of Air-Flow Rate and Biochar Addition on the Oxygen Concentration in Waste and Emitted Gases During Biostabilization of Undersized Fraction from Municipal Solid Waste

Deodorisation of Industrial Gases Using a Biofiltration Plant

Study of carbon materials using X-ray diffraction method, qualitative and quantitative analysis of adsorption

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