Effect of organic loading rate on the performance of two-stage anaerobic digestion of the organic fraction of municipal solid waste (OFMSW)

2015 ◽  
Vol 72 (3) ◽  
pp. 384-390 ◽  
Author(s):  
Reyna I. Rodríguez-Pimentel ◽  
Suyen Rodríguez-Pérez ◽  
Oscar Monroy-Hermosillo ◽  
Florina Ramírez-Vives
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Cod Removal ◽  
Upflow Anaerobic Sludge Blanket ◽  
Organic Loading Rate ◽  
Anaerobic Sludge ◽  
Organic Loading ◽  
Organic Fraction ◽  
Two Stage

Two-stage anaerobic digestion of the organic fraction of municipal solid waste (OFMSW) was carried out: hydrolysis and acidogenesis in a continuous anaerobic hydrolytic leach bed (AHLB) reactor loaded at different rates (Bv = 3.8–7 gVSSL−1d−1) and methanogenesis of leachates, diluted with municipal wastewater in an upflow anaerobic sludge blanket (UASB) reactor at organic loading rates of 6.6–13 gCODLr−1d−1. In the AHLB reactor, 51–76% and 58–71% volatile solids and chemical oxygen demand (COD) removal efficiencies were obtained. During the hydrolysis and acidogenesis phases, the effluents were at pH 4.93, the leachate had a volatile fatty acids concentration of 35 g/L and the biogas was composed only of CO2. The average methane production in the UASB in the load of 4.4 gVS L−1 d−1 in the AHLB was 3.32 LCH4Lr−1d−1 (yCH4 = 80%), with COD removal efficiency of 95% and methane yield 279 LCH4KgVS−1OFMSW degraded.

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.

Effect of organic loading rate during anaerobic digestion of municipal solid waste

2016 ◽  
Vol 217 ◽  
pp. 56-61 ◽  
Author(s):  
Hiya Dhar ◽  
Pradeep Kumar ◽  
Sunil Kumar ◽  
Somnath Mukherjee ◽  
Atul N. Vaidya
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Loading Rate ◽  
Organic Loading Rate ◽  
Organic Loading

scholarly journals Two-stage anaerobic digestion of the organic fraction of municipal solid waste – Effects of process conditions during batch tests

2018 ◽  
Vol 126 ◽  
pp. 14-20 ◽  
Author(s):  
Maria Cristina Lavagnolo ◽  
Francesca Girotto ◽  
Razieh Rafieenia ◽  
Luciano Danieli ◽  
Luca Alibardi
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Process Conditions ◽  
Organic Fraction ◽  
Two Stage ◽  
Batch Tests

Semi-Dry Thermophilic Anaerobic Digestion of Fresh and Pre-Composted Organic Fraction of Municipal Solid Waste (MSW): Digester Performance

1993 ◽  
Vol 27 (2) ◽  
pp. 87-96 ◽  
Author(s):  
J. Mata-Alvarez ◽  
F. Cecchi ◽  
P. Pavan ◽  
A. Bassetti
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Pilot Plant ◽  
Organic Loading ◽  
Organic Fraction ◽  
Loading Rates ◽  
Thermophilic Anaerobic Digestion ◽  
Dry Conditions

The paper presents the results coming from about 2 years of experimentation carried out in a pilot plant digesting fresh and pre-composted mechanically sorted organic fraction of municipal solid waste (MS-OFMSW) in the thermophilic range of temperature (55°C). The process is studied using both substrates at different hydraulic retention times (HRT) and organic loading rates(OLR) in semi-dry conditions, reaching very stressing situations (HRT=6d, OLR=19.9 KgTVS/m3d). Results show the advantage of digesting fresh MS-OFMSW at low HRT (6/8 days), whereas at higher HRT (>12 days) yields improve using pre-composted MS-OFMSW.

scholarly journals Effect of Organic Loading Rate on Anaerobic Digestion Performance of Mesophilic (UASB) Reactor Using Cattle Slaughterhouse Wastewater as Substrate

2018 ◽  
Vol 15 (10) ◽  
pp. 2220 ◽  
Author(s):  
Mohammed Musa ◽  
Syazwani Idrus ◽  
Che Hasfalina ◽  
Nik Daud
Keyword(s):  
Methane Concentration ◽  
Volatile Fatty Acids ◽  
Loading Rate ◽  
Cod Removal ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Organic Loading Rate ◽  
Anaerobic Sludge ◽  
Organic Loading ◽  
Slaughterhouse Wastewater

In this study, the performance of a laboratory scale upflow anaerobic sludge blanket (UASB) reactor operating at mesophilic temperature (35 °C) was examined. Cattle slaughterhouse wastewater (CSWW) was used as the main substrate. The total and effective volumes of the reactor were 8 L and 6 L, respectively. Twelve different organic loading rates (OLR) were applied and the performance was evaluated. The chemical oxygen demand (COD) removal efficiency was more than 90% during batch study. In the continuous study, COD removal was also approximately 90% at OLR 0.4 g/L d−1 which subsequently dropped to below 50% when the loading rate increased to 15 g/L d−1. Approximately 5 L/d of biogas was obtained with high methane concentration at stages VI and XI corresponding to OLR of 2 and 10 g/L d−1, respectively. It was observed that the concentration of volatile fatty acids was low and that the alkalinity of the wastewater was sufficient to avoid acidification. Specific methane yields of 0.36 and 0.38 LCH4/g COD added were achieved at OLR 7 and 10 g/L d−1. A hydraulic retention time (HRT) of 1 day was sufficient to remove greater than 70% of COD which correspond to 89% methane concentration. Parameters like soluble COD, NH3-N, pH, alkalinity, total suspended solid (TSS), fats, oil, and grease were also investigated. The results show that the UASB reactor could serve as a good alternative for anaerobic treatment of CSWW and methane production.

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.

Bio-Hythane production from organic fraction of municipal solid waste in single and two stage anaerobic digestion processes

2019 ◽  
Vol 294 ◽  
pp. 122220 ◽  
Author(s):  
Chakali Prashanth Kumar ◽  
Rena ◽  
A. Meenakshi ◽  
Abhishek S. Khapre ◽  
Sunil Kumar ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Organic Fraction ◽  
Two Stage
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