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

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.

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Effect of anaerobic digestion on sequential pyrolysis kinetics of organic solid wastes using thermogravimetric analysis and distributed activation energy model

Bioresource Technology ◽

10.1016/j.biortech.2016.12.057 ◽

2017 ◽

Vol 227 ◽

pp. 297-307 ◽

Cited By ~ 19

Author(s):

Xiaowei Li ◽

Qingqing Mei ◽

Xiaohu Dai ◽

Guoji Ding

Keyword(s):

Activation Energy ◽

Anaerobic Digestion ◽

Thermogravimetric Analysis ◽

Energy Model ◽

Solid Wastes ◽

Pyrolysis Kinetics ◽

Distributed Activation Energy Model ◽

Organic Solid ◽

Organic Solid Wastes ◽

Kinetics Of

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Improving the Quantity and Quality of Biogas Production in Tehran Anaerobic Digestion Power Plant by Application of Materials Recirculation Technique

International Journal of Renewable Energy Development ◽

10.14710/ijred.9.2.167-175 ◽

2020 ◽

Vol 9 (2) ◽

pp. 167-175

Author(s):

Reza Naghavi ◽

Mohammad Ali Abdoli ◽

Abdolreza Karbasi ◽

Mehrdad Adl

Keyword(s):

Anaerobic Digestion ◽

Power Plant ◽

Fossil Fuels ◽

Biogas Production ◽

Solid Wastes ◽

High Concentration ◽

Urban District ◽

Organic Solid ◽

Organic Solid Wastes

Tehran anaerobic digestion power plant has been built on the eastern margin of the urban district by the purpose of processing the organic fraction of municipal solid waste. One of the most suitable methods for the treatment of organic matter is the use of anaerobic digestion (AD) process, which in addition to significant reduction of organic solid wastes, will produce valuable energy. Contributing to maintain the environment, improve urban health, saving on fossil fuels and producing rich fertilizer for agricultural use are important advantages of anaerobic digestion. The plant has been set up in 2014 with a nominal acceptance capacity of 300 tons of organic solid wastes per day and the nominal power generation of 2000 kWe. This system has been faced with considerable challenges in terms of quantity and quality of biogas during operation. The high concentration of hydrogen sulfide (H2S) in produced biogas and the lack of appropriate technologies in the plant for biogas refining are critical for the biogas generator engine deployed in the complex. The purpose of this article is to investigate the factors affecting the quality and quantity of Tehran's AD plant biogas using various H2S reduction approaches and selection of appropriate implementing technologies. The results showed that the recirculation of the digester slurry increased the methane content by more than 30% and reduced H2S by more than 98%.©2020. CBIORE-IJRED. All rights reserved

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