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

2015 ◽  
Vol 16 (2) ◽  
pp. 3769-3782 ◽  
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

Will anaerobic digestion of solid waste survive in the future?

2006 ◽  
Vol 53 (8) ◽  
pp. 187-194 ◽  
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.

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

2021 ◽  
Vol 9 (9) ◽  
pp. 1877
Author(s):  
Vladimir Mironov ◽  
Anna Vanteeva ◽  
Diyana Sokolova ◽  
Alexander Merkel ◽  
Yury Nikolaev
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Biological Treatment ◽  
Bulking Agents ◽  
Organic Fraction ◽  
High Nitrogen Content ◽  
General Activity ◽  
Microbial Biodiversity ◽  
High Nitrogen ◽  
First Time

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.

Management of the biodegradable fraction of residual waste by bioreactor landfill

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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