Re-Feeding of Hydrolyzed Biosolids to Anaerobic Digestion for Enhanced Biogas Generation; Case Study at Fairfield-Suisun Sewer District

2018 ◽  
Vol 2018 (4) ◽  
pp. 443-454
Author(s):  
James Dunbar ◽  
Rick Mosher ◽  
Gregory Baatrup ◽  
Ajay Singh
Keyword(s):  
Anaerobic Digestion

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.

scholarly journals Anaerobic digestion life cycle assessment (LCA)

2020 ◽  
Vol 2 (5) ◽  
pp. 92-104
Author(s):  
Farhad Sakhaee
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Anaerobic Digestion ◽  
Training Center ◽  
Treatment Facility ◽  
Practical Solution ◽  
Treatment Facilities ◽  
Management Report

Abstract: Life cycle assessment (LCA) is a tool to evaluate environmental impacts based on products of a process. This research is a case study of wastewater treatment facilities of ERTC (Environmental Resources Training Center), SIUE University, based on available data for two semi-annual sludge quantities (year 2015) from sludge management report. The aim of this study is to compare set of possibilities for a wastewater treatment facility at ERTC. The simulation has been done through SimaPro model. Electricity and methane were considered and the cumulative weight of their impacts has been investigated. Total solids for two semi-annual sludge has been fed to the model in kilogram and different production (electricity and methane) configuration were investigated. The most plausible configuration based on the cumulative environmental impact proposed as best practical solution.

scholarly journals Biogas from Anaerobic Digestion: Power Generation or Biomethane Production?

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 743 ◽  
Author(s):  
Gianluca Caposciutti ◽  
Andrea Baccioli ◽  
Lorenzo Ferrari ◽  
Umberto Desideri
Keyword(s):  
Anaerobic Digestion ◽  
Energy Balance ◽  
Combustion Engine ◽  
Electric Energy ◽  
Optimal Level ◽  
Strong Impact ◽  
Co2 Absorption ◽  
External Energy ◽  
Biomethane Production

Biogas is a fuel obtained from organic waste fermentation and can be an interesting solution for producing electric energy, heat and fuel. Recently, many European countries have incentivized the production of biomethane to be injected into natural gas grids or compressed and used as biofuel in vehicles. The introduction of an upgrading unit into an existing anaerobic digestion plant to convert biogas to biomethane may have a strong impact on the overall energy balance of the systems. The amount of biomethane produced may be optimized from several points of view (i.e., energy, environmental and economic). In this paper, the mass and energy fluxes of an anaerobic digestion plant were analyzed as a function of the biogas percentage sent to the upgrading system and the amount of biomethane produced. A numerical model of an anaerobic digestion plant was developed by considering an existing case study. The mass and energy balance of the digesters, cogeneration unit, upgrading system and auxiliary boiler were estimated when the amount of produced biomethane was varied. An internal combustion engine was adopted as the cogeneration unit and a CO2 absorption system was assumed for biogas upgrading. Results demonstrated that the energy balance of the plant is strictly dependent on the biomethane production and that an excess of biomethane production makes the plant totally dependent on external energy sources. As for the environmental impact, an optimal level of biomethane production exists that minimizes the emissions of equivalent CO2. However, high biomethane subsides can encourage plant managers to increase biomethane production and thus reduce CO2 savings.

A Case Study of Start-Up Considerations for 2TPAD Anaerobic Digestion

2012 ◽  
Vol 2012 (2) ◽  
pp. 1421-1430
Author(s):  
Robert C. Borneman ◽  
Alice Canella ◽  
Chamindra Y. Dassanayake
Keyword(s):  
Anaerobic Digestion ◽  
Start Up

scholarly journals Environmental Impact Assessment of Food Waste Management Using Two Composting Techniques

2020 ◽  
Vol 12 (4) ◽  
pp. 1595 ◽  
Author(s):  
Aisha Al-Rumaihi ◽  
Gordon McKay ◽  
Hamish R. Mackey ◽  
Tareq Al-Ansari
Keyword(s):  
Global Warming ◽  
Anaerobic Digestion ◽  
Environmental Impact ◽  
Food Waste ◽  
Fossil Fuels ◽  
Impact Category ◽  
Windrow Composting ◽  
The Impact ◽  
Total Impact

Food waste is a significant contributor to greenhouse gas emissions (GHG) and therefore global warming. As such, the management of food waste can play a fundamental role in the reduction of preventable emissions associated with food waste. In this study, life cycle assessment (LCA) has been used to evaluate and compare the environmental impact associated with two composting techniques for treating food waste using SimaPro software; windrow composting and the hybrid anaerobic digestion (AD) method. The study, based on a 1 tonne of food waste as a functional unit for a case study in the State of Qatar, concludes that anaerobic digestion combined composting presents a smaller environmental burden than windrow composting. The majority of the emissions generated are due to the use of fossil fuels during transportation, which correspond to approximately 60% of the total impact, followed by the impact of composting with 40% of the impact especially in terms of global warming potential. Environmental assessment impacts were the highest in windrow composting for the acidification impact category (9.39 × 10 − 1 kg SO2 eq). While for AD combined composting the impact was highest for the human toxicity impact category (3.47 × 10 kg 1,4 − DB eq).

Evaluation of the biogas potential of agricultural biomass waste for energy applications in Greece: A case study of the western Greece region

2020 ◽  
pp. 0734242X2097060
Author(s):  
Konstantinos Moustakas ◽  
Dimitrios Sotiropoulos ◽  
Stergios Vakalis
Keyword(s):  
Anaerobic Digestion ◽  
Total Biomass ◽  
Biomass Waste ◽  
Agricultural Biomass ◽  
Energy Applications ◽  
Performance Specifications ◽  
Entire Amount ◽  
Available Information ◽  
Western Greece

Agricultural biomass can be best described as the organic matter residues from farming that remain within the fields after harvesting, along with tree trimmings. From the overall Greek Energy Balance, only a small fraction consists of biomass and this has been the main driving force behind this study. Due to the numerous ongoing agricultural activities, western Greece was selected as an ideal area for a case study. As a second step, the aim was to investigate the feasibility of the current anaerobic digestion plants to utilize the total biomass as feedstock. An additional scope to provide certifiable proof of the essential rural biomass assets available. Information on the potential of agricultural biomass is provided, with a focus on the performance specifications and the social advantages, but also the soil added substances and the produced biofuels. Subsequently, two options for waste management were discussed to illustrate the possibility of generating energy. The anaerobic digestion plants available in western Greece are illustrated in detail and the yearly rate of the main agrarian biomass is evaluated to be 715,080 tons. Arable crops, mechanical plants and tree trimming are recorded as the noteworthy sources. It is estimated that the proposed anaerobic digestion system will handle the entire amount of biomass and deliver max per year electricity 775 GWh and thermal energy 1.119 GWh.

The selection of pretreatment options for anaerobic digestion (AD): A case study in olive oil waste production

2015 ◽  
Vol 259 ◽  
pp. 630-639 ◽  
Author(s):  
Bernardo Ruggeri ◽  
Federico Battista ◽  
Milena Bernardi ◽  
Debora Fino ◽  
Giuseppe Mancini
Keyword(s):  
Anaerobic Digestion ◽  
Olive Oil ◽  
Waste Production ◽  
Selection Of
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