Analysis of the presence of improper materials in the composting process performed in ten MBT plants

Montejo, C.; Ramos, P.; Costa, Carlos; Márquez, M. Carmen

doi:10.1016/j.biortech.2010.06.024

Cited by 41 publications

(23 citation statements)

References 18 publications

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“…It has to be pointed out that, although paper is a biodegradable material, it is known to have relatively slow kinetics of biodegradation under aerobic conditions (Komilis 2006), especially if compared to the duration of the biostabilization treatment (4 weeks). Hence, this might have influenced the performance of the biodegradation by reducing the rate of the whole process (Lornage et al 2007;Bayard et al 2010;Montejo et al 2010). However, as previously described, ''impurities'' are reduced in the output of the stabilization process by means of the secondary mechanical sieving at 20 mm.…”

Section: Resultsmentioning

confidence: 90%

“…It is more evident that the latter was composed by higher percentages of particle size fractions below 10 mm than SBW I. The determination of the material composition was carried out in order to investigate the content of non-biodegradable materials, i.e., plastics, glass, metals, inert and hazardous materials, which may cause a physical contamination (Baird et al 2005;Dimambro et al 2007;Farrell and Jones 2009;Montejo et al 2010), as well as a chemical contamination due to high heavy metal content (as thereafter discussed) by compromising the final quality of the stabilized biowaste. As previously mentioned, the analysis regarded only classes C and D of SBW I and SBW IV.…”

Section: Resultsmentioning

confidence: 99%

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Quality evaluation and improvement of mechanically–biologically treated municipal solid waste in view of a possible recovery

Lonardo

Lombardi

Gavasci

2014

Int. J. Environ. Sci. Technol.

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This study aimed to identify possibilities to improve the quality of the stabilized biowaste coming from the mechanical-biological treatment of municipal solid waste produced in Rome for possible recovery rather than landfilling. The waste sampled before and after the first and the fourth week of aerobic biodegradation as well as different particle size classes composing the biostabilized materials were characterized in order to investigate the content and distribution of contaminants. Results showed, firstly, that the stabilized biowaste was not biologically stable after 4 weeks of biostabilization process, presenting dynamic respiration index [1,000 mg O 2 kg VS -1 h -1 . Heavy metal (Cd, Cr, Cu, Ni, Pb, Zn) content fulfilled the requirements for utilization, but by contrast, their release in water phase was quite high and not complying with Italian regulatory limits for waste recovery. In order to raise the quality, the biological process management should be improved by increasing the water amount to add to the rotting waste since the output material had moisture (19.7 % WM) lower than the recommended content for an optimized aerobic biodegradation ([40 %). Furthermore, fractions having particle size higher than 10 mm, composed of high content of impurities and heavy metals, should be separated by obtaining a reduction in chemical-physical contamination. Finer waste flow (\10 mm) can be recovered in environmental remediation activities, whereas coarser fractions ([10 mm) can be used in waste-to-energy plants, given the great content of high calorific value materials and the compliance with characteristics defined for solid recovered fuels.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Quality evaluation and improvement of mechanically–biologically treated municipal solid waste in view of a possible recovery

Lonardo

Lombardi

Gavasci

2014

Int. J. Environ. Sci. Technol.

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“…In the past, the MSW has mainly been deposited on the landfills.Because of its simplicity, such disposal has a low price, but it is contrary to the order of hierarchy of waste disposal [9,10] and the previously mentioned EU waste management directives and documents. MSW contains mostly organic, biodegradable fraction which occupies 55 % of the total amount of waste [8].…”

Section: Mechanical and Biological Waste Treatmentmentioning

confidence: 91%

“…Putrecible ingredients from organic fraction and high moisture content cause in anaerobic conditions on the landfills production of pollutants in the form of leachate and emission of greenhouse gases. If this organic matter is treated in MBT facilities stabilization of the organic matter is achieved [11] dm [10]. This fact speaks in favour of waste treatment in the MBT facilities, directly contributing to the reduction of biodegradable waste on a landfill according to the Landfill Directive adopted by the European Commission [10,12,13,14].…”

Section: Mechanical and Biological Waste Treatmentmentioning

confidence: 99%

Flexibility of mechanical biological treatment plants

2016

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Subject rewiewMechanical Biological Treatment (MBT) of waste represents a series of mechanical and biological processes which have the purpose to reduce the amount of waste that is placed on a landfill. In accordance to the 'hierarchy of waste' defined by the EU Waste Framework Directive, waste disposal to landfill represents the least desirable option.Considering the MBT process, the input component is a Municipal Solid Waste (MSW) and output components consist of Refuse Derived Fuel (RDF), compost and possibly the materials suitable for recycling.The quality of output components depends on the input waste composition.More efficient primary waste separation decreases capacity and complexity of MBT facilities.RDF offers possibility of energy recovery from the part of such separated fractions.MBT technology does not solve the problem of harmful substances residual in MSW narrowing the application of compost obtained by the biological treatment and requiring additional treatment of flue gases from RDF combustion. Comparison of the composition of untreated MSW and RDF obtained by the MBT process is also presented in the paper. Keywords: compost; MBT; RDF/SRF; waste hierarchy Fleksibilnost MBO postrojenjaPregledni članak Mehaničko biološka obrada otpada (MBO) predstavlja niz mehaničkih i bioloških postupaka koji imaju za svrhu smanjiti količinu otpada koji se odlaže na odlagalište što prema "hijerarhiji otpada" definiranoj Direktivom o otpadu (Waste Framework Directive) Europske Unije predstavlja najmanje poželjnu opciju zbrinjavanja otpada. Ulazna komponenta u MBO proces je kruti komunalni otpad (MSW), a izlazne komponente čine RDF gorivo, kompost i eventualno materijali pogodni za recikliranje. Kvaliteta izlaznih komponenti ovisi o ulaznom sastavu otpada. Učinkovito primarno razdvajanje otpada smanjuje potrebu za MBO kapacitetima. RDF nudi mogućnost energetske oporabe dijela izdvojenih frakcija. MBO tehnologije ne rješavaju problem štetnih tvari zaostalih u MSW, koje sužavaju primjenu komposta dobivenog biološkom obradom, a kod spaljivanja RDF-a zahtijevaju dodatne postupke obrade dimnih plinova. U radu je dana usporedba sastava neobrađenog MSW-a i RDF-a dobivenog odabranim MBO postupkom.

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“…A variable fraction, depending on the efficiency of the method used for composting and refining, is normally rejected. The amount of reject material can be from 4-5% [4], 14% [5], 22% [6] or even 58% [7] of the weight of the raw (unrefined) compost and it usually consists of small pieces of glass, stones, paper, cardboard, plastic, etc., as well as organic matter. Nevertheless, the amount of biodegradable matter (not completely stabilized) in the refuse can be considerable (75 -85%) [7].…”

Section: Introductionmentioning

confidence: 99%

Testing the Degree of Biostabilization in the Refuse from Composting Plants

Izquierdo¹

2014

AJEP

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Abstract:In composting plants, aerobic fermentation could not to be complete and therefore, the fate of unstabilyzed wastes from the compost refining, uses to be landfill. This fact provokes an extra biogas generation in landfills, which contributes to greenhouse effect. In this work, the refuse of compost refining process has been subjected to an anaerobic fermentation. For that, in order to analyze their biogas generation, three samples of different composting plants have been selected. In one of these plants, the amount of biogas generation has been considerable, which involves a not complete stabilization of biowaste in the composting process.

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Analysis of the presence of improper materials in the composting process performed in ten MBT plants

Cited by 41 publications

References 18 publications

Quality evaluation and improvement of mechanically–biologically treated municipal solid waste in view of a possible recovery

Quality evaluation and improvement of mechanically–biologically treated municipal solid waste in view of a possible recovery

Flexibility of mechanical biological treatment plants

Testing the Degree of Biostabilization in the Refuse from Composting Plants

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