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

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

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.

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

scholarly journals Acidic pretreatment of cellulose for bio methane production

2021 ◽  
Vol 23 (11) ◽  
pp. 153-158
Author(s):  
Mahmood Ajel ◽  
◽  
Fawziea M. Hussien ◽  
Johain J. Faraj ◽  
◽  
...  
Keyword(s):  
Biogas Production ◽  
Solid Wastes ◽  
Plant Residues ◽  
Organic Fraction ◽  
Municipal Solid Wastes ◽  
Alternative Source ◽  
Organic Solid ◽  
Acidic Pretreatment ◽  
Microbial Groups ◽  
Organic Solid Wastes

Present work deals with the exhaustive investigations of rapid de-lignification processes from source-sorted organic fractions that are recalcitrant in nature. Organic solid wastes (OSW) belong to the organic fraction of municipal solid wastes (MSW) and they act as enormous potential substrate for alternative source of energy in the form of bio-fuels. Nevertheless, these substrates are not easily biodegradable and the degree of biodegradability is solely dependent on the composition and characteristic of organic solid wastes in municipal solid wastes. The component responsible for recalcitrance of organic solid wastes is lignin that occurs in variable amounts in different plant residues. In order to remove the recalcitrance from organic fraction municipal solid wastes and to make it more easily degradable by microbial groups, certain pretreatment techniques have been adopted and they are applied either individually or in combined way for enhancement of anaerobic digestion (AD) process. The present work studied the effect of acid treatment with acetic acid on the used substrate, evaluated its effectiveness on biogas production, and studied the concentrations of CH4 and CO2 during the fermentation period, which amounted to 90 days. All results are presented in clear curves for the purpose of facilitating the study.

A comprehensive review of anaerobic digestion of organic solid wastes in relation to microbial community and enhancement process

2018 ◽  
Vol 99 (2) ◽  
pp. 507-516 ◽  
Author(s):  
Neng-Xiong Wang ◽  
Xiao-Ying Lu ◽  
Yiu-Fai Tsang ◽  
Yanping Mao ◽  
Chi-Wing Tsang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Anaerobic Digestion ◽  
Solid Wastes ◽  
Comprehensive Review ◽  
Organic Solid ◽  
Organic Solid Wastes
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