Mixed Municipal Solid Waste Hygienisation for Refuse-Derived Fuel Production by Ozonation in the Novel Configuration Using Fluidized Bed and Horizontal Reactor

Wolny-Koładka, Katarzyna; Żukowski, Witold

doi:10.1007/s12649-017-0087-7

Cited by 18 publications

(21 citation statements)

References 24 publications

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“…Temperature is an environmental variable with strong impact on the metabolism of microorganisms, population counts and species composition [47]. Temperatures below 20°C may result in slower or suspended biological waste processing [48].…”

Section: Resultsmentioning

confidence: 99%

Microbiological and Energetic Assessment of the Effects of the Biodrying of Fuel Produced from Waste

Malinowski

Wolny-Koładka

2017

Ecological Chemistry and Engineering S

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Biological drying (biodrying) is one of the methods of biological processing of waste, used mainly as part of the mechanical biological treatment of mixed municipal waste. Biological drying uses the heat released during the decomposition of organic matter to reduce the amount of water in dried waste. The aim of the analyses was to provide a microbiological and energetic (fuel) assessment of the process of biodrying of alternative fuel (RDF) obtained by mechanical sorting of mixed municipal waste. The resulting alternative fuel (obtained with just sorting) is characterised by varied moisture content and the presence of diverse groups of microorganisms. The analyses were intended to assess 3 alternative methods of biodrying of alternative fuel in order to produce a stable end product for utility power generation and the cement industry. The analyses were performed using special bioreactors equipped with custom (innovative) fluidised bed, aeration system (air flow rate 500 m 3 · h -1 ), effluents drain systems, post-process air offtake and 4 temperature sensors. The assessment of the impact of the employed bed aeration methods on the quality of the alternative fuel was performed in 3 repetitions with the same external parameters. The obtained results show that after 8 days of biodrying, in the most favourable option, the moisture content in the fuel was reduced to the level of 18.7%, i.e. by 39%, the resulting fuel was microbiologically stable and the calorific value of the fuel was increased on average by 3.2 MJ · kg -1 .

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Section: Resultsmentioning

confidence: 99%

Microbiological and Energetic Assessment of the Effects of the Biodrying of Fuel Produced from Waste

Malinowski

Wolny-Koładka

2017

Ecological Chemistry and Engineering S

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“…The numbers of vegetative and spores bacteria point to an abundance of nutrients readily digestible for microorganisms in the studied raw materials. The high numbers of bacteria, mold fungi, and actinobacteria also suggest the occurrence of favorable conditions (temperature, substrate pH, MC) for the growth of microorganisms [18]. The occurrence of potentially pathogenic bacteria was studied too, i.e., the presence of Staphylococcus spp., Escherichia coli, Salmonella spp.…”

Section: Microbiological Physical and Chemical Analysesmentioning

confidence: 99%

“…Because of the possibility of spontaneous combustion [15] and its negative impact on the health of workers [16], entrepreneurs use various methods of protection and prevention of these harmful effects on the environment [17]. There are sensors, fire extinguishing systems, and infrared cameras installed in halls; materials undergo processes of ozonation [18], use of ultrasound or microwave radiation [19], biological stabilization [20], biological drying [21,22], or pH modifications. A popular method is also agglomeration of those materials [23,24] e.g., by the pellet production process [25,26] or granulation [27].…”

Section: Introductionmentioning

confidence: 99%

“…and Shigella spp. ), of the Staphylococcus genus, as well as bacteria generating endospores, i.e., Clostridium perfringens is a key problem [18]. A high concentration of these microorganisms, as well as their metabolites (endotoxins, enterotoxins, mycotoxins), may cause different diseases, such as respiratory tract inflammation, chemical or allergenic pneumonia, skin allergies, food poisoning, meningitis, and sepsis [34].…”

Section: Introductionmentioning

confidence: 99%

“…A high concentration of these microorganisms, as well as their metabolites (endotoxins, enterotoxins, mycotoxins), may cause different diseases, such as respiratory tract inflammation, chemical or allergenic pneumonia, skin allergies, food poisoning, meningitis, and sepsis [34]. The presence of pathogenic microorganisms in wastes is not only a potential epidemiological threat, but it may also cause microbiological contamination of the environment [18].…”

Section: Introductionmentioning

confidence: 99%

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Impact of Calcium Oxide on Hygienization and Self-Heating Prevention of Biologically Contaminated Polymer Materials

2020

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During the storage of spent polymer materials derived from municipal solid waste, which contain biodegradable impurities, an intense growth of microorganisms takes place. The aerobic metabolism of microorganisms may cause these materials to combust spontaneously and to become a real epidemiological risk for humans. The aim of the research is to determine the optimal addition of calcium oxide (CaO), which effectively reduces the number of selected microorganism groups populating the analyzed materials, in which spent polymers represent a significant fraction: refuse-derived fuel (RDF) and an undersize fraction of municipal solid waste (UFMSW). The main novelty of the experiments is to assess the benefits of using the commonly available and cheap filler (CaO), to hygienize the material and to reduce the fire hazard arising from its storage. During the mixing of spent polymer materials with pulverized CaO (mass shares: 1, 2, and 5% CaO), temperature changes were monitored using thermography. Moisture content (MC), pH, respiration activity (AT4) and bacterial count were determined before and after the experiment. During the addition of CaO (especially when the content was at 5%) to the UFMSW, higher maximum temperatures were obtained than in the case of RDF analyses, which may be the result of a high percentage of the biodegradable fraction and higher MC of the UFMSW. In all cases the waste temperature did not increase again after 3 min. CaO used in the experiment effectively limited the number of microorganisms. The addition of 5% of CaO has showed the strongest antimicrobial properties, and it can be recommended for hygienization of the analyzed materials and for the reduction of the risk of self-heating during their storage in windrows.

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The Effect of a Biopreparation Intended for Improvement of Biowaste Processing Efficiency on the Quality of Obtained Stabilized Waste

Malinowski

Wolny-Koładka

Gliniak

et al. 2019

Infrastructure and Environment

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Mixed Municipal Solid Waste Hygienisation for Refuse-Derived Fuel Production by Ozonation in the Novel Configuration Using Fluidized Bed and Horizontal Reactor

Cited by 18 publications

References 24 publications

Microbiological and Energetic Assessment of the Effects of the Biodrying of Fuel Produced from Waste

Microbiological and Energetic Assessment of the Effects of the Biodrying of Fuel Produced from Waste

Impact of Calcium Oxide on Hygienization and Self-Heating Prevention of Biologically Contaminated Polymer Materials

The Effect of a Biopreparation Intended for Improvement of Biowaste Processing Efficiency on the Quality of Obtained Stabilized Waste

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