scholarly journals Anaerobic Co-digestion of Organic Fraction of Municipal Solid waste and Septage for Sustainable Waste Treatment: A Case Study from Goa, India

2021 ◽  
Vol 1 (3) ◽  
pp. 1-8
Author(s):  
Ravikiran Shet ◽  
Srikanth Mutnuri
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Waste Treatment ◽  
Biogas Production ◽  
Pilot Scale ◽  
Anaerobic Digester ◽  
Full Scale ◽  
Organic Fraction ◽  
Set Up

India generates 0.15 million metric tons (MT) of solid waste per day out of which more than 80% is organic fraction. Apart from this, 38% of the households use septic tanks where proper disposal of faecal sludge is also need of the hour. Anaerobic co-digestion (ACD) of two different substrates has positive potential towards solving this problem. In the present study, ACD of organic fraction of municipal solid waste (OFMSW) and septage solids (SS) was studied at three different levels, i.e., lab-scale, pilot-scale (1 m3), and full scale- capacity (325 m3). A loading rate of 1.5 kg VS/m3 was selected. The bio-methanation potential (BMP) assay showed a maximum biogas generation, i.e., 120±20.6 mL/gmVS with 68% maximum methane concentration at a 5:1 OFMSW and SS ratio. Cumulative biogas production after 30 days was 1.6 L/gmVS. The ultimate biogas production in the pilot-scale plant was 1000±100.5 L/day with 71% methane. The plant was also efficient in removing 87% of COD and 61% of VS. The full-scale anaerobic digester was set up at Mormugao Municpal Council, Goa India wherein the objective was to co-digest OFMSW and SS. This digester showed a similar removal pattern like earlier studies i.e., 94% and 45% COD and VS removal, respectively. The average methane content of the biogas was 68%. Full-scale operation of the anaerobic digester did not show any operational problems at the chosen co-digestion conditions.

Innovative Two-Stage Process for the Recovery of Energy and Compost from the Organic Fraction of Municipal Solid Waste (MSW)

1993 ◽  
Vol 27 (2) ◽  
pp. 133-143 ◽  
Author(s):  
M. Kayhanian ◽  
G. Tchobanoglous
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Retention Time ◽  
Biogas Production ◽  
Pilot Scale ◽  
Gas Production ◽  
High Solids ◽  
Organic Fraction ◽  
Active Volume ◽  
Engineering Department

An innovative system for stabilizing the organic fraction of municipal solid waste (OFMSW) has been documented on a pilot scale at the Civil Engineering Department of the University of California at Davis. The system involves the combined methods of high-solids anaerobic digestion and aerobic composting for the recovery of energy and the production of compost from the OFMSW. The performance of the high-solids anaerobic reactor was monitored for three mass retention times. The anaerobic digester was operated under extreme as well as normal conditions. The performance of the aerobic compost unit was monitored based on the physical and chemical characteristics of the final humus by-product. In general, the combined process was very stable at a 30 d retention time and is capable of removing essentially all of the biodegradable fraction of the organic fraction of MSW. A biogas production level of up to 6 liters per liter of active volume of reactor was achieved. The process stability and gas production decreased slightly when the retention time was reduced to 15 d. The output from the second stage is a fine humus-like material with a thermal content of about 14.80 MJ/kg.

Co-digestion of energy crops and the source-sorted organic fraction of municipal solid waste

2005 ◽  
Vol 52 (1-2) ◽  
pp. 217-222 ◽  
Author(s):  
Å. Nordberg ◽  
M. Edström
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Volatile Fatty Acids ◽  
Pilot Scale ◽  
Nutritional Composition ◽  
Energy Crops ◽  
Full Scale ◽  
Organic Fraction ◽  
Technical Performance ◽  
Reduced Viscosity

The biological and technical performance during co-digestion of energy crops and the source-sorted organic fraction of municipal solid waste has been investigated at laboratory and pilot scale. A 50:50 (TS-based) mixture of energy crops and organic waste reached a loading rate of 6.0 gVS L−1d−1 with a methane yield of 0.33–0.38 L gVS−1, while a 80:20 mixture showed elevated levels of volatile fatty acids at 5.5 gVS L−1d−1 The better performance of the 50:50 mixture can partly be explained by a better nutritional composition. Mincing the ley crop reduced viscosity and reduced problems with fibre floating and scum-blanket formation. The electricity consumed for mincing and stirring at a full-scale plant corresponds to ca 3% of the energy produced. Calculations of the costs for full-scale plants indicate that the price of the up-graded biogas has to be at least 0.078 Euro/kWh in order to balance the costs.

Municipal Solid Waste (MSW) Organic Fraction to Energy. Cuban Case Study. Brief Considerations

2016 ◽  
Vol 2 (2) ◽  
pp. 39-44
Author(s):  
Oscar Cabeza ◽  
◽  
Alfredo Alonso ◽  
Yoel Lastre ◽  
Jorge Medina ◽  
...  
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Organic Fraction

The evolution of compost stability and maturity during the full-scale treatment of the organic fraction of municipal solid waste

2019 ◽  
Vol 232 ◽  
pp. 264-270 ◽  
Author(s):  
Alessandra Cesaro ◽  
Anna Conte ◽  
Vincenzo Belgiorno ◽  
Antonietta Siciliano ◽  
Marco Guida
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Full Scale ◽  
Organic Fraction ◽  
Compost Stability

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.

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