Energy production from mechanical biological treatment and Composting plants exploiting solid anaerobic digestion batch: An Italian case study

2012 ◽  
Vol 56 ◽  
pp. 112-120 ◽  
Author(s):  
F. Di Maria ◽  
A. Sordi ◽  
C. Micale
Keyword(s):  
Anaerobic Digestion ◽  
Biological Treatment ◽  
Energy Production ◽  
Italian Case

scholarly journals Life Cycle Assessment Analysis of Alfalfa and Corn for Biogas Production in a Farm Case Study

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1285
Author(s):  
Fabiola Filippa ◽  
Francesco Panara ◽  
Daniela Leonardi ◽  
Livia Arcioni ◽  
Ornella Calderini
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Anaerobic Digestion ◽  
Greenhouse Gases ◽  
Energy Production ◽  
Fossil Fuels ◽  
Biogas Production ◽  
Life Cycle Assessment Study ◽  
Energy Inputs

In the last years the greenhouse effect has been significantly intensified due to human activities, generating large additional amounts of Greenhouse gases (GHG). The fossil fuels are the main causes of that. Consequently, the attention on the composition of the national fuel mix has significantly grown, and the renewables are becoming a more significant component. In this context, biomass is one of the most important sources of renewable energy with a great potential for the production of energy. The study has evaluated, through an LCA (Life Cycle Assessment) study, the attitude of alfalfa (Medicago sativa) as “no food” biomass alternative to maize silage (corn), in the production of biogas from anaerobic digestion. Considering the same functional unit (1 m3 of biogas from anaerobic digestion) and the same time horizon, alfalfa environmental impact was found to be much comparable to that of corn because it has an impact of about 15% higher than corn considering the total score from different categories and an impact of 5% higher of corn considering only greenhouse gases. Therefore, the analysis shows a similar environmental load in the use of alfalfa biomass in energy production compared to maize. Corn in fact, despite a better yield per hectare and yield of biogas, requires a greater amount of energy inputs to produce 1m3 of biogas, while alfalfa, which requires less energy inputs in its life cycle, has a lower performance in terms of yield. The results show the possibility to alternate the two crops for energy production from an environmental perspective.

scholarly journals Techno-economic Analysis of the Olive Oil Mills Waste Valorisation for Energy Production: A Case Study of Corfu

2019 ◽  
Vol 75 (4) ◽  
pp. 18-29
Author(s):  
Athanasios Sotirios Dounavis
Keyword(s):  
Anaerobic Digestion ◽  
Olive Oil ◽  
Energy Production ◽  
Biogas Production ◽  
Oil Production ◽  
Organic Load ◽  
Energy Demands ◽  
Waste Valorisation ◽  
Olive Oil Mills

Olive oil production in Greece is undoubtedly linked to its history and tradition. However, large quantities of by-products are produced (with the olive oil production) which are harmful to the environment. Those environmental problems are a result of the chemical composition of the waste and its high organic load. This intense phenomenon has led to the exploration and development of methods and technolog0ies for the treatment of olive mill waste. One of the methods used is the biogas production through anaerobic digestion and its subsequent disposal for energy production. This method could be particularly appealing to the Greek islands so that there is their energy dependence from the mainland. A typical example is the island of Corfu as the problem of waste from olive oil mills is intense and its energy demands are increased. Therefore, energy production via anaerobic digestion could greatly contribute to overcoming the current situation. The purpose of this study is to design a central power plant, which is fed by biogas, produced by the anaerobic digestion of the waste oil mills in Corfu and to present various economic data regarding its construction and operation.

scholarly journals Biowaste Management in Italy: Challenges and Perspectives

2019 ◽  
Vol 11 (15) ◽  
pp. 4213 ◽  
Author(s):  
Francesca Demichelis ◽  
Francesco Piovano ◽  
Silvia Fiore
Keyword(s):  
Anaerobic Digestion ◽  
Co2 Emissions ◽  
Energy Production ◽  
Primary Energy ◽  
Livestock Waste ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
Italian Context ◽  
Domestic Power

The aim of this work is the development of a methodology for the technical and environmental assessment of biowaste valorization in 2G biorefineries. Italy was chosen as case study, considering years 2016–2017. Approach: the Italian context was evaluated through the following key parameters: Gross domestic power, climate, demography, and population density distribution described the Italian framework. The four most abundant biowaste categories were defined through their amounts and geo-localization: wastewater and sewage sludge (WSS, 4.06 Mt/y), organic fraction of municipal solid waste (OFMSW, 1.7 Mt/y), agricultural livestock waste (ALW, 5.7 Mt/y), and waste deriving from the food industry (FIW, 2.6 Mt/y). The geo-localization and quantitative evaluations of the available biowaste amounts were aimed at defining the dimension and localization of the biorefinery plant and at optimizing supply and transport chains, while the qualitative characteristic were aimed to evaluate the most promising process among thermo-valorization (TH) and anaerobic digestion (AD). Results: All considered biowastes were appropriate for biorefinery processes, since carbon content exceeds 40% and the carbon–nitrogen ratio was between 10 and 30. All biowaste categories were evaluated as feedstocks for two biorefinery processes: anaerobic digestion (AD) and thermo-valorization (TH) with energy recovery. Compared to TH, AD achieved in all cases the best performances in terms of produced energy and avoided CO2 emissions. The primary energy production of AD and TH for WSS, OFMSW, ALW, and FIW were respectively: 7.89 vs. 2.4 kWh/kg; 8.7 vs. 2.6 kWh/kg; 10.85 vs. 5.5 kWh/kg; and 12.5 vs. 7.8 kWh/kg. The main findings of this work were: the adoption of AD was technically more suitable than TH; AD increased the avoided CO2 emissions of 10%–89.9% depending on biowaste category.

Characterization and treatability studies of cigarette industry wastewaters: a case study

1997 ◽  
Vol 36 (2-3) ◽  
pp. 69-74
Author(s):  
G. Bozarslan ◽  
S. K. Çelebi ◽  
F. Sengül
Keyword(s):  
Chemical Treatment ◽  
Biological Treatment ◽  
Continuous System ◽  
Cod Removal ◽  
Optimum Dose ◽  
Fenton Reagent ◽  
Cigarette Industry ◽  
Settling Behaviour ◽  
Characterization Studies

In this study, the wastewater of one of the cigarette factories in Izmir was characterized and treatability studies were done. The characterization studies of the wastewater showed that the COD, and the pH changes drastically. The chemical treatability studies of the influent wastewater were done by using Ca(OH)2, FeCl3 and Fenton Reagent. The optimum dose of FeCI3 was determined by jar tests. When using Ca(OH)2, the best flocculation, settling behaviour, and the highest COD removal occurred around pH 11. The optimum doses of Fenton Reagent (FeSO4 and H2O2) were determined. The supernatants of the previously chemically treated wastewaters were used for biological treatment. According to total COD removal efficiencies and the amount of sludge production during chemical treatment, FeCl3 was found to be the most economical and effective coagulant. Chemical treatment units were designed for a batch and a continuous system. The batch system has more advantages than a continuous system in this case.

Novel Biological treatment of Ammonia for low C/N ratios: case study of landfill leachates treatment.

2004 ◽  
Vol 2004 (10) ◽  
pp. 315-324
Author(s):  
Jacqueline Pasanau ◽  
Jens Meinhold ◽  
Michéle Payraudeau ◽  
John Cigana ◽  
Lucie Patria
Keyword(s):  
Biological Treatment ◽  
Landfill Leachates

scholarly journals Co-Management of Sewage Sludge and Other Organic Wastes: A Scandinavian Case Study

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3411
Author(s):  
Clara Fernando-Foncillas ◽  
Maria M. Estevez ◽  
Hinrich Uellendahl ◽  
Cristiano Varrone
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Resource Recovery ◽  
Organic Wastes ◽  
Industrial Wastes ◽  
Wastewater Management ◽  
Sewage Sludge Management ◽  
The Common ◽  
Green Chemicals

Wastewater and sewage sludge contain organic matter that can be valorized through conversion into energy and/or green chemicals. Moreover, resource recovery from these wastes has become the new focus of wastewater management, to develop more sustainable processes in a circular economy approach. The aim of this review was to analyze current sewage sludge management systems in Scandinavia with respect to resource recovery, in combination with other organic wastes. As anaerobic digestion (AD) was found to be the common sludge treatment approach in Scandinavia, different available organic municipal and industrial wastes were identified and compared, to evaluate the potential for expanding the resource recovery by anaerobic co-digestion. Additionally, a full-scale case study of co-digestion, as strategy for optimization of the anaerobic digestion treatment, was presented for each country, together with advanced biorefinery approaches to wastewater treatment and resource recovery.

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