The role of dry anaerobic digestion in the treatment of the organic fraction of municipal solid waste: A systematic review

2020 ◽  
Vol 143 ◽  
pp. 105866
Author(s):  
Luíza Santana Franca ◽  
João Paulo Bassin
Keyword(s):  
Systematic Review ◽  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Organic Fraction ◽  
Dry Anaerobic Digestion

Critical analysis of PCDD/F emissions from anaerobic digestion

2008 ◽  
Vol 58 (9) ◽  
pp. 1721-1725 ◽  
Author(s):  
E. C. Rada ◽  
M. Ragazzi
Keyword(s):  
Anaerobic Digestion ◽  
Health Risk ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Critical Analysis ◽  
Biological Process ◽  
Deep Understanding ◽  
Sanitary Landfill ◽  
Organic Fraction

This paper concerns a particular aspect of anaerobic digestion, that is the emission of PCDD/F in different scenarios where this biological process is present. The considered scenarios are: anaerobic digestion of automatically sorted Municipal Solid Waste, source separated organic fraction of Municipal Solid Waste treated in an anaerobic digester, anaerobic process developed in a Municipal Solid Waste sanitary landfill. Not always the emissions taken into account are related to combustion of biogas from anaerobic digestion: the loss of biogas from a landfill causes an uncontrolled emission of PCDD/F. The paper is completed with an analysis of the role of anaerobic digestion in PCDD/F inventories and health risk considerations. Indeed the most detailed inventories offer emission factors useful for a deep understanding of the phenomenon of PCDD/F release into the atmosphere. Concerning health risk, some suggestions in order to decrease it are proposed.

Recovery and Disposal of the Organic Fraction of Municipal Solid Waste (MSW) by Means of Combined Anaerobic and Aerobic Bio-Treatments

1993 ◽  
Vol 27 (2) ◽  
pp. 121-132 ◽  
Author(s):  
G. Vallini ◽  
F. Cecchi ◽  
P. Pavan ◽  
A. Pera ◽  
J. Mata-Alvarez ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Water Balance ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Anaerobic Sludge ◽  
Organic Fraction ◽  
Digested Sludge ◽  
Processing Step ◽  
Thermophilic Digestion ◽  
Dry Anaerobic Digestion

The paper deals with the semi-dry anaerobic digestion of municipal solid waste followed by composting as finishing treatment of the digested sludge. The integration of the anaerobic and aerobic treatments was studied as approach to close the water balance of the semi-dry anaerobic digestion process and to remove the phytotoxicity of the digested effluent. This study evaluated the response of the anaerobic effluent to the co-composting post-processing step, whether the anaerobic sludge came from mesophilic semi-dry digestion or thermophilic semi-dry nethanization. Evaluation of the strategy adopted was carried out in terms of performance of aerobic stabilization and its incidence on the economy of the overall treatment and the water balance of the process. Co-composting gave best results when integrated with thermophilic digestion.

scholarly journals Energy recovery from biowaste: influence of hydraulic retention time on biogas production in dry-anaerobic digestion

2021 ◽  
Vol 238 ◽  
pp. 01007
Author(s):  
Elena Rossi ◽  
Isabella Pecorini ◽  
Renato Iannelli
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Retention Time ◽  
Energy Recovery ◽  
Hydraulic Retention Time ◽  
Flow Reactor ◽  
Biogas Production ◽  
Organic Fraction ◽  
Dry Anaerobic Digestion

The hydraulic retention time (HRT) is a key parameter in dry-anaerobic digestion to set during the reactor configuration in order to achieve the optimal biogas production. For this reason, the study compared the results of two experimental tests operating with an HRT of 23 and 14 days. During the tests, the feedstock was organic fraction of municipal solid waste with a solid content of 33% and the digester was a pilot-scale plug-flow reactor operating in thermophilic condition. The highest specific biogas production of 311.91 Nlbiogas kg-1 d-1 was achieved when the HRT was set to 23 days. On the contrary, the highest methane production rate of 1.43 NlCH4 l-1 d-1 was achieved for an HRT of 14 days. In addition, the volatile solids removal (49.15% on average) and the energy content o(4.8 MJ kg-1 on average) were higher for HRT 23 days than for HRT14 days. The results indicated that in dry-anaerobic digestion of organic fraction of municipal solid waste, 23 days is a suitable HRT for energy recovery.

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