Performance of thermophilic semi-dry anaerobic digestion process changing the feed biodegradability

2000 ◽  
Vol 41 (3) ◽  
pp. 75-81 ◽  
Author(s):  
P. Pavan ◽  
P. Battistoni ◽  
J. Mata-Alvarez ◽  
F. Cecchi
Keyword(s):  
Anaerobic Digestion ◽  
Pilot Scale ◽  
Progressive Increase ◽  
Solid Wastes ◽  
Organic Fraction ◽  
Municipal Solid Wastes ◽  
Anaerobic Digestion Process ◽  
Digestion Process ◽  
Double Phase ◽  
Stable Conditions

The study concerns the application of the semi-dry single phase thermophilic anaerobic digestion process to the organic fraction of municipal solid waste. The xperiments were carried out using 3 m3 and 1 m3 CSTR pilot scale reactors. The process performance in terms of biogas yields, digester stability and kinetic spects was studied, considering a progressive increase in the feed biodegradability, in order to evaluate the process behaviour changing from an undifferentiated collection of waste to a separate collection. This was carried out using blends of two different kinds of substrates: mechanically sorted organic fraction of municipal solid wastes (MS-OFMSW) and source sorted organic fraction of municipal solid wastes (SS-OFMSW). The study shows that OLR up to 6 kgTVS/m3d can be applicable for the medium selected fraction (TVS/TS≤0.7), while for the MS-OFMSW alone this limit can be doubled. The results obtained with SS-OFMSW alone suggest the use of the double phase process to give more stable conditions.

Rheology of sludge from double phase anaerobic digestion of organic fraction of municipal solid waste

2000 ◽  
Vol 41 (3) ◽  
pp. 51-59 ◽  
Author(s):  
P. Battistoni ◽  
P. Pavan ◽  
J. Mata-Alvarez ◽  
M. Prisciandaro ◽  
F. Cecchi
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Pilot Scale ◽  
Gas Production ◽  
Organic Loading Rate ◽  
Second Phase ◽  
Organic Fraction ◽  
Double Phase ◽  
Long Term Experiment

In this paper experimental results on the anaerobic digestion of sewage sludge and organic fraction of municipal solid waste (OFMSW) by using a double phase process are reported. The long-term experiment has been carried out on a pilot scale plant, performed in different sets of operative conditions, during which granulometric distributions of particles in sludges and rheological properties of sludges were monitored. A significant fluidification of sludge was evidenced in the meso-thermo process, especially taking into account the variation in sludge behaviour from the first to the second phase. In the thermo-thermo process a fluidification higher than that shown in meso-thermo conditions is not observed, this suggesting that better results in terms of sludge conditioning can be obtained in a long time spent in thermophilic anaerobic digestion. Total volatile solids (TVS) and total fixed solids (TFS) become the most important parameters when mathematical modelling is applied to these processes.In the acidogenic phase, hydraulic retention time (HRT) and temperature are used to determine rigidity coefficient (RC), while only temperature is needed for yield stress (YC). Organic loading rate (OLR) and specific gas production (SGP) exert an important role in methanogenic phase description.

scholarly journals Impact of pH Management Interval on Biohydrogen Production from Organic Fraction of Municipal Solid Wastes by Mesophilic Thermophilic Anaerobic Codigestion

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Chaudhry Arslan ◽  
Asma Sattar ◽  
Ji Changying ◽  
Abdul Nasir ◽  
Irshad Ali Mari ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Solid Wastes ◽  
Biohydrogen Production ◽  
Organic Fraction ◽  
Municipal Solid Wastes ◽  
Anaerobic Codigestion ◽  
Ph Management

The biohydrogen productions from the organic fraction of municipal solid wastes (OFMSW) were studied under pH management intervals of 12 h (PM12) and 24 h (PM24) for temperature of37±0.1°C and55±0.1°C. The OFMSW or food waste (FW) along with its two components, noodle waste (NW) and rice waste (RW), was codigested with sludge to estimate the potential of biohydrogen production. The biohydrogen production was higher in all reactors under PM12 as compared to PM24. The drop in pH from 7 to 5.3 was observed to be appropriate for biohydrogen production via mesophilic codigestion of noodle waste with the highest biohydrogen yield of 145.93 mL/gCODremovedunder PM12. When the temperature was increased from 37°C to 55°C and pH management interval was reduced from 24 h to 12 h, the biohydrogen yields were also changed from 39.21 mL/gCODremovedto 89.67 mL/gCODremoved, 91.77 mL/gCODremovedto 145.93 mL/gCODremoved, and 15.36 mL/gCODremovedto 117.62 mL/gCODremovedfor FW, NW, and RW, respectively. The drop in pH and VFA production was better controlled under PM12 as compared to PM24. Overall, PM12 was found to be an effective mean for biohydrogen production through anaerobic digestion of food waste.

Biological pretreatment applied to industrial organic fraction of municipal solid wastes (OFMSW): Effect on anaerobic digestion

2011 ◽  
Vol 172 (1) ◽  
pp. 321-325 ◽  
Author(s):  
L.A. Fdez.-Güelfo ◽  
C. Álvarez-Gallego ◽  
D. Sales Márquez ◽  
L.I. Romero García
Keyword(s):  
Anaerobic Digestion ◽  
Solid Wastes ◽  
Biological Pretreatment ◽  
Organic Fraction ◽  
Municipal Solid Wastes

scholarly journals Comparative analysis of common full scale reactors for dry anaerobic digestion process

2019 ◽  
Vol 83 ◽  
pp. 01011 ◽  
Author(s):  
Khaled Elsharkawy ◽  
Mohamed Elsamadony ◽  
Hafez Afify
Keyword(s):  
Anaerobic Digestion ◽  
Solid Wastes ◽  
The Other ◽  
Operational Conditions ◽  
Anaerobic Digestion Process ◽  
Digestion Process ◽  
Organic Solid ◽  
The Common ◽  
Organic Solid Wastes ◽  
Dry Anaerobic Digestion

Organic solid wastes are produced with large amount wherever there are human activities. However, improper treated organic wastes made them as sources of diseases. On the other hand, these fractions contain nutrients and energy, so they have also valuable resources. As a result, exploring their potential as an energy source can be accomplish via anaerobic digestion process, in which, organics converted into hydrogen, methane and/or ethanol. Therefore, this manuscript introduces an overview of the common applied types of reactor that can handle these types of wastes in their solid state and recover them in term of biogas, as well as, stabilize the produced digestate to bio-fertilizers by compositing approach. A comparison also listed to demonstrate the optimum operational conditions and expected amount of biogas from each type.

scholarly journals Thermophilic Co-Digestion of the Organic Fraction of Municipal Solid Wastes—The Influence of Food Industry Wastes Addition on Biogas Production in Full-Scale Operation

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3146 ◽  
Author(s):  
Przemysław Seruga ◽  
Małgorzata Krzywonos ◽  
Marta Wilk
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Full Scale ◽  
Solid Wastes ◽  
Process Efficiency ◽  
Electricity Production ◽  
Organic Fraction ◽  
Municipal Solid Wastes ◽  
Biogas Yield ◽  
Yield Increase

Anaerobic digestion (AD) has been used widely as a form of energy recovery by biogas production from the organic fraction of municipal solid wastes (OFMSW). The aim of this study was to evaluate the effect of the introduction of co-substrates (restaurant wastes, corn whole stillage, effluents from the cleaning of chocolate transportation tanks) on the thermophilic anaerobic digestion process of the mechanically separated organic fraction of municipal solid wastes in a full-scale mechanical-biological treatment (MBT) plant. Based on the results, it can be seen that co-digestion might bring benefits and process efficiency improvement, compared to mono-substrate digestion. The 15% addition of effluents from the cleaning of chocolate transportation tanks resulted in an increase in biogas yield by 31.6%, followed by a 68.5 kWh electricity production possibility. The introduction of 10% corn stillage as the feedstock resulted in a biogas yield increase by 27.0%. The 5% addition of restaurant wastes contributed to a biogas yield increase by 21.8%. The introduction of additional raw materials, in fixed proportions in relation to the basic substrate, increases biogas yield compared to substrates with a lower content of organic matter. In regard to substrates with high organic loads, such as restaurant waste, it allows them to be digested. Therefore, determining the proportion of different feedstocks to achieve the highest efficiency with stability is necessary.

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