Combined Digestion and Composting of Organic Industrial and Municipal Wastes in Switzerland

1993 ◽  
Vol 27 (2) ◽  
pp. 169-182 ◽  
Author(s):  
W. Edelmann ◽  
H. Engeli
Keyword(s):  
Anaerobic Digestion ◽  
Total Solid ◽  
Anaerobic Treatment ◽  
Operating Costs ◽  
Total Potential ◽  
Self Sufficiency ◽  
Organic Solid ◽  
Appropriate Treatment ◽  
Organic Solid Wastes ◽  
Aerobic And Anaerobic

The potential of the organic solid wastes in Switzerland from household, industry, gardens, public grounds and treatment of wood has been determined to be about 955 000 tons Total Solid (TS) per year. While lignified wastes have to be composted, wet and easily degradable wastes are suitable for anaerobic digestion. These humid wastes cause odor problems in composting facilities. For more than one third of the total potential digestion is a better solution than composting. Combined plants, where the digestion is directly combined with composting, show many advantages, such as the appropriate treatment for different substrate fractions, use of the same machineries for the pre- and the post-treatment, self-sufficiency in energy as well as utilization of the waste water derived from liquid-solid separation at the end of the digestion for the irrigation of the windrows. Detailed investment and operating costs for different aerobic and anaerobic treatment methods are presented. It is shown, that anaerobic digestion is significantly cheaper than composting. Combined plants cost rather less than plants which treat the wastes exclusively by way of composting. Therefore, the treatment of solid organic wastes in combined plants is recommended.

Resource recovery and circular economy from organic solid waste using aerobic and anaerobic digestion technologies

2020 ◽  
Vol 301 ◽  
pp. 122778 ◽  
Author(s):  
Steven Wainaina ◽  
Mukesh Kumar Awasthi ◽  
Surendra Sarsaiya ◽  
Hongyu Chen ◽  
Ekta Singh ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Solid Waste ◽  
Circular Economy ◽  
Resource Recovery ◽  
Organic Solid Waste ◽  
Organic Solid ◽  
Aerobic And Anaerobic

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.

Research achievements and application in anaerobic treatment of organic solid wastes—A review

2006 ◽  
Vol 25 (2) ◽  
pp. 178-181 ◽  
Author(s):  
Fuchun Zhou ◽  
Deguo Xiong ◽  
Xuefu Xian ◽  
Longjun Xu
Keyword(s):  
Anaerobic Treatment ◽  
Solid Wastes ◽  
Organic Solid ◽  
Organic Solid Wastes

Comparison of liquid and dewatered digestate as inoculum for anaerobic digestion of organic solid wastes

2019 ◽  
Vol 87 ◽  
pp. 228-236 ◽  
Author(s):  
E. Hosseini Koupaie ◽  
A. Azizi ◽  
A.A. Bazyar Lakeh ◽  
H. Hafez ◽  
E. Elbeshbishy
Keyword(s):  
Anaerobic Digestion ◽  
Solid Wastes ◽  
Organic Solid ◽  
Organic Solid Wastes

Theoretical Models of Reaction Mechanisms in Solid Anaerobic Digestion: A Review

2011 ◽  
Vol 347-353 ◽  
pp. 1247-1250
Author(s):  
Ji Ying Zhu ◽  
Wei Li ◽  
Rui Xia Shen
Keyword(s):  
Anaerobic Digestion ◽  
Reaction Mechanisms ◽  
Theoretical Models ◽  
Gas Production ◽  
Research Perspectives ◽  
Organic Solid ◽  
Process Studies ◽  
Organic Solid Wastes ◽  
And Diffusion ◽  
Reaction Speed

Compared with the traditional anaerobic digestion, solid anaerobic digestion (SAD) of organic solid wastes has many advantages. But lower moisture content of the substrate seriously impedes the transmission and diffusion of the intermediate products and microorganism cells, therefore affects reaction speed, gas production and stability of the process. Studies on the mechanisms of SAD are very difficult because of multiple steps of the reactions and complexity of the substrates, which restricted the development of SAD. In this paper, reaction mechanisms and kinetic models of SAD process were reviewed and the research perspectives in this field were discussed.

scholarly journals Biogas Production from Organic Wastes: Integrating Concepts of Circular Economy

Fuels ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 144-167
Author(s):  
Marcos Ellacuriaga ◽  
José García-Cascallana ◽  
Xiomar Gómez
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Industrial Applications ◽  
Land Application ◽  
Operating Costs ◽  
Capital Investments ◽  
Organic Solid ◽  
Relevant Role ◽  
Operating Reactor ◽  
Energy Grid

Anaerobic digestion is traditionally used for treating organic materials. This allows the valorization of biogas and recycling of nutrients thanks to the land application of digestates. However, although this technology offers a multitude of advantages, it is still far from playing a relevant role in the energy market and from having significant participation in decarbonizing the economy. Biogas can be submitted to upgrading processes to reach methane content close to that of natural gas and therefore be compatible with many of its industrial applications. However, the high installation and operating costs of these treatment plants are the main constraints for the application of this technology in many countries. There is an urgent need of increasing reactor productivity, biogas yields, and operating at greater throughput without compromising digestion stability. Working at organic solid contents greater than 20% and enhancing hydrolysis and biogas yields to allow retention times to be around 15 days would lead to a significant decrease in reactor volume and therefore in initial capital investments. Anaerobic digestion should be considered as one of the key components in a new economy model characterized by an increase in the degree of circularity. The present manuscript reviews the digestion process analyzing the main parameters associated with digestion performance. The novelty of this manuscript is based on the link established between operating reactor conditions, optimizing treatment capacity, and reducing operating costs that would lead to unlocking the potential of biogas to promote bioenergy production, sustainable agronomic practices, and the integration of this technology into the energy grid.

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