Microbiota Dynamics of Mechanically Separated Organic Fraction of Municipal Solid Waste during Composting

Mechanical-biological treatment of municipal solid waste (MSW) facilitates reducing the landfill workload. The current research aimed to study general activity parameters, content, functions, and diversity of fungal and prokaryotic microbiota in mechanically separated organic fraction of MSW (ms-OFMSW) composting, without using bulking agents and process-promoting additives. During 35 days of composting, vigorous emission of CO2 (max. 129.4 mg CO2 kg−1 h−1), NH3 (max. 0.245 mg NH3 kg−1 h−1), and heat release (max. 4.28 kJ kg−1 h−1) occurred, indicating intense microbial activity. Immediately following the preparation of the composting mixture, eight genera of lactic acid bacteria and fungal genera Rhizopus, Aspergillus, Penicillium, Agaricus, and Candida were predominant. When the temperature increased to more than 60 °C, the microbial biodiversity decreased. Due to succession, the main decomposers of ms-OFMSW changed. The Bacillaceae family, the genera Planifilum, Thermobifida, and Streptomyces, and the fungal genera Thermomyces and Microascus were involved in the processes of organic matter mineralization at the high-temperature and later stages. The biodiversity of the microbiota increased at the stages of cooling and maturation under conditions of relatively high nitrogen content. Thus, the microbial community and its succession during ms-OFMSW composting were characterized for the first time in this work.

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Thermochemical Pretreatments of Organic Fraction of Municipal Solid Waste from a Mechanical-Biological Treatment Plant

International Journal of Molecular Sciences ◽

10.3390/ijms16023769 ◽

2015 ◽

Vol 16 (2) ◽

pp. 3769-3782 ◽

Cited By ~ 8

Author(s):

Carlos Alvarez-Gallego ◽

Luis Fdez-Güelfo ◽

María de los Angeles Romero Aguilar ◽

Luis Romero García

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Biological Treatment ◽

Treatment Plant ◽

Organic Fraction

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Will anaerobic digestion of solid waste survive in the future?

Water Science & Technology ◽

10.2166/wst.2006.249 ◽

2006 ◽

Vol 53 (8) ◽

pp. 187-194 ◽

Cited By ~ 63

Author(s):

L. De Baere

Keyword(s):

Anaerobic Digestion ◽

Municipal Solid Waste ◽

Solid Waste ◽

Biological Treatment ◽

Operating Costs ◽

Organic Fraction ◽

Treatment Technology ◽

Treatment Techniques ◽

The Future ◽

Viable Treatment

Anaerobic digestion has captured a significant share of the European market for the biological treatment of the organic fraction in municipal solid waste. Almost 4 million ton per year in digestion capacity has been installed through the construction of more than 120 full-scale plants. Not all plants have been equally successful, due to poor planning, design or bad operation. This, besides higher than expected investment and operating costs, may have slowed down the growth of anaerobic digestion of solid waste. However, an evaluation of the development of anaerobic digestion over the last 15 years shows that there is now a greater diversity in application, a wider range in types of systems and suppliers, and a continued increasing rate of implementation throughout most parts of Europe. New alternative treatment techniques have not seen the same level of success as anaerobic digestion. Anaerobic digestion has been established as a viable treatment technology for the organic fraction of municipal solid waste and will most likely play an even more important role in the future.

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Comparison of different biological treatment scenarios for the organic fraction of municipal solid waste

International Journal of Environmental Science and Technology ◽

10.1007/s13762-013-0421-y ◽

2013 ◽

Vol 12 (1) ◽

pp. 1-14 ◽

Cited By ~ 15

Author(s):

L. Lombardi ◽

E. A. Carnevale ◽

A. Corti

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Biological Treatment ◽

Organic Fraction

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Management of the biodegradable fraction of residual waste by bioreactor landfill

Waste Management & Research ◽

10.1177/0734242x20953496 ◽

2020 ◽

Vol 38 (10) ◽

pp. 1153-1160

Author(s):

Francesco Di Maria ◽

Mervat El-Hoz

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Biological Treatment ◽

Electrical Energy ◽

Integrated System ◽

Bioreactor Landfill ◽

Organic Fraction ◽

Leachate Recirculation ◽

Solids Concentration ◽

Volatile Solids

The performances of an integrated system based on mechanical biological treatment and bioreactor landfill with leachate recirculation for managing the mixed municipal solid waste generated in a given Italian district were investigated. In the mechanical biological treatment the municipal solid waste was mechanically sorted into two main streams: a dry and a mechanically sorted organic fraction consisting of 45,000 tonnes year−1. After being sorted the mechanically sorted organic fraction was aerobically pretreated before being disposed of in the 450,000 m3 bioreactor landfill. Experimental runs showed that an aerobic pretreatment period ranging from 15 to 30 days was able to maximize the methane generated by the mechanically sorted organic fraction once landfilled up to 10 Nm3 tonne−1. The aerobic pretreatment leads to a significant volatile solids reduction in the first 30 days, after which the volatile solids concentration remained quite constant. Similarly the potential dynamic respirometer index was significantly reduced in the first 15 days of the aerobic pretreatment decreasing from about 5,000 to about 3,500 mgO2kgVS−1h−1. The whole amount of electrical energy producible by the landfill ranged from 18.5 kWh tonne−1 to 21 kWh tonne−1, depending on the strategies adopted for the activation in bioreactor mode of each landfill cell by the leachate recirculation.

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Municipal Solid Waste (MSW) Organic Fraction to Energy. Cuban Case Study. Brief Considerations

Global Journal of Energy Technology Research Updates ◽

10.15377/2409-5818.2015.02.02.2 ◽

2016 ◽

Vol 2 (2) ◽

pp. 39-44

Author(s):

Oscar Cabeza ◽

◽

Alfredo Alonso ◽

Yoel Lastre ◽

Jorge Medina ◽

...

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Organic Fraction

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EFFECT OF HYDRAULIC RETENTION TIME ON THERMOPHILIC ANAEROBIC DIGESTION OF PAPER-CONTAINING ORGANIC FRACTION OF MUNICIPAL SOLID WASTE

Journal of Japan Society of Civil Engineers Ser G (Environmental Research) ◽

10.2208/jscejer.74.iii_195 ◽

2018 ◽

Vol 74 (7) ◽

pp. III_195-III_203

Author(s):

Aijun ZHU ◽

Jing WU ◽

Yu QIN ◽

Toshimasa HOJO ◽

Yu-You LI

Keyword(s):

Anaerobic Digestion ◽

Municipal Solid Waste ◽

Solid Waste ◽

Retention Time ◽

Hydraulic Retention Time ◽

Organic Fraction ◽

Thermophilic Anaerobic Digestion

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Economic and environmental assessment of bacterial poly(3-hydroxybutyrate) production from the organic fraction of municipal solid waste

Bioresources and Bioprocessing ◽

10.1186/s40643-021-00392-4 ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Jon Kepa Izaguirre ◽

Leire Barañano ◽

Sonia Castañón ◽

José A. L. Santos ◽

M. Teresa Cesário ◽

...

Keyword(s):

Municipal Solid Waste ◽

Solid Waste ◽

Environmental Assessment ◽

Basal Medium ◽

Economic Feasibility ◽

Limiting Factors ◽

Organic Fraction ◽

Extraction Solvent ◽

Experimental Parameters ◽

The Cost

AbstractThe management of municipal solid waste is a major logistic and environmental problem worldwide. Nonetheless, the organic fraction of municipal solid waste (OFMSW) is a valuable source of nutrients which can be used for a variety of purposes, according to the Circular Economy paradigm. Among the possible applications, the bioproduction of a biodegradable polyester, poly(3-hydroxybutyrate) [P(3HB)], using OFMSW as carbon platform is a promising strategy. Here, an economic and environmental assessment of bacterial P(3HB) production from OFMSW is presented based on previously published results. The SuperPro Designer® software was used to simulate P(3HB) production under our experimental parameters. Two scenarios were proposed depending on the fermentation medium: (1) enzymatic hydrolysate of OFMSW supplemented with glucose and plum waste juice; and (2) basal medium supplemented with glucose and plum waste juice. According to our results, both scenarios are not economically feasible under our experimental parameters. In Scenario 1, the low fermentation yield, the cost of the enzymes, the labour cost and the energy consumption are the factors that most contribute to that result. In Scenario 2, the cost of the extraction solvent and the low fermentation yield are the most limiting factors. The possibility of using process waste as raw material for the generation of other products must be investigated to enhance economic feasibility. From an environmental viewpoint, the photochemical oxidation potential (derived from the use of anisole as extraction solvent) and the generation of acid rain and global warming effect (caused by the burning of fuels for power generation) are the most relevant impacts associated to P(3HB) production under our experimental parameters.

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Environmental impact assessment of organic fraction of municipal solid waste treatment by anaerobic digestion in Sri Lanka

Waste Management & Research ◽

10.1177/0734242x211013405 ◽

2021 ◽

pp. 0734242X2110134

Author(s):

Rasangika Thathsaranee Weligama Thuppahige ◽

Sandhya Babel

Keyword(s):

Anaerobic Digestion ◽

Sri Lanka ◽

Environmental Impact ◽

Municipal Solid Waste ◽

Solid Waste ◽

Resource Scarcity ◽

Policy Formation ◽

Ozone Formation ◽

Organic Fraction ◽

Management Options

The management of organic fraction of municipal solid waste (OFMSW) has continued to be a significant challenge in Sri Lanka. Anaerobic digestion is one of the management options of OFMSW. However, it generates unavoidable environmental impacts that should be addressed. The present study focuses to assess the environmental impact of a full-scale anaerobic digestion plant in Sri Lanka from a life cycle perspective. The inventory data were obtained from direct interviews and field measurements. Environmental burdens were found to be in terms of global warming potential (230 kg CO2 eq) ozone formation on human health (6.15 × 10−6 kg NO x eq), freshwater eutrophication (2.92 × 10−3 kg P eq), freshwater ecotoxicity (9.27 × 10−5 kg 1,4 DCB eq), human carcinogenic toxicity (3.98 × 10−4 kg 1,4 DCB eq), land use (1.32 × 10−4 m2 a crop eq) and water consumption (2.23 × 10−2 m3). The stratospheric ozone depletion, fine particulate matter formation, ozone formation on terrestrial ecosystems, terrestrial acidification, marine eutrophication, ecotoxicity (terrestrial and marine), human non-carcinogenic toxicity, mineral resource scarcity and fossil resource scarcity, were avoided due to electricity production. Results show that the direct gaseous emissions and digestate generation should be addressed in order to reduce the burdens from the anaerobic digestion plant. Finally, the results of the study could help in policy formation and decision-making in selecting future waste management systems in Sri Lanka.

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