On-site CO2 bio-sequestration in anaerobic digestion: current status and prospects

2021 ◽  
pp. 125037
Author(s):  
Suyun Xu ◽  
Zihao Qiao ◽  
Liwen Luo ◽  
Yongqi Sun ◽  
Jonathan Woon-Chung Wong ◽  
...  
2019 ◽  
Vol 37 (1_suppl) ◽  
pp. 27-39 ◽  
Author(s):  
Mohanakrishnan Logan ◽  
Chettiyappan Visvanathan

Anaerobic digestion has emerged as the preferred treatment for organic fraction of municipal solid waste. Digestate management strategies are devised not only for safe disposal but also to increase the value and marketability. Regulations and standards for digestate management are framed to address the pollution concerns, conserve vulnerable zones, prevent communicable diseases, and to educate on digestate storage and applications. Regulations and the desired end uses are the main drivers for the enhancement of digestate through pretreatment, in vessel cleaning, and post-digestion treatment technologies for solid and liquid fractions of digestate. The current management practice involves utilization of digestate for land application either as fertilizer or soil improver. Prospects are bright for alternative usage such as microalgal cultivation, biofuel and bioethanol production. Presently, the focus of optimization of the anaerobic digestion process is directed only towards enhancing biogas yield, ignoring the quality of digestate produced. A paradigm shift is needed in the approach from ‘biogas optimization’ to ‘integrated biogas–digestate optimization’.


2021 ◽  
Author(s):  
Samer Dahahda

The rapid depletion of natural resources and the environmental concerns associated with the use of fossil fuels as the main source of global energy is leading to an increased interest in alternative and renewable energy sources. Lignocellulosic biomass is the most abundant source of organic materials that can be utilized as an energy source. Anaerobic digestion has been proven to be an effective technology for converting organic material into energy products such as biogas. However, the nature of lignocellulosic materials hinders the ability of microorganisms in an anaerobic digestion process to degrade and convert organic material to biogas. Therefore, a pretreatment step is necessary to improve the degradability of lignocellulosic materials and achieve higher biogas yield. Several pretreatment methods have been studied over the past few years including physical, thermal, chemical and biological pretreatment. This paper reviews biological and thermal pretreatment as two main promising methods used to improve biogas production from lignocelluloses. A greater focus is given on enzymatic pretreatment which is one of the promising yet under-researched biological pretreatment method. The paper addresses challenges in degrading lignocellulosic materials and the current status of research to improve biogas yield from lignocelluloses through biological and thermal pretreatment.


Chemosphere ◽  
2019 ◽  
Vol 229 ◽  
pp. 188-199 ◽  
Author(s):  
Hamed Baniamerian ◽  
Parisa Ghofrani Isfahani ◽  
Panagiotis Tsapekos ◽  
Merlin Alvarado-Morales ◽  
Mohammad Shahrokhi ◽  
...  

2014 ◽  
Vol 71 ◽  
pp. 263-270 ◽  
Author(s):  
Elisavet Theofanous ◽  
Nicoletta Kythreotou ◽  
Gregoris Panayiotou ◽  
Georgios Florides ◽  
Ioannis Vyrides

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 475
Author(s):  
Omid Norouzi ◽  
Animesh Dutta

With the implementation of new policies supporting renewable natural gas production from organic wastes, Canada began replacing traditional disposal methods with highly integrated biogas production strategies. Herein, data from published papers, Canadian Biogas Association, Canada’s national statistical agency, and energy companies’ websites were gathered to gain insight into the current status of anaerobic digestion plants in recovering energy and resource from organic wastes. The availability of materials prepared for recycling by companies and local waste management organizations and existing infrastructures for municipal solid waste management were examined. Governmental incentives and discouragements in Canada and world anaerobic digestion leaders regarding organic fraction municipal solid waste management were comprehensively reviewed to identify the opportunities for developing large-scale anaerobic digestion in Canada. A range of anaerobic digestion facilities, including water resource recovery facilities, standalone digesters, and on-farm digesters throughout Ontario, were compared in terms of digestion type, digester volume, feedstock (s), and electricity capacity to better understand the current role of biogas plants in this province. Finally, technology perspectives, solutions, and roadmaps were discussed to shape the future in terms of organic fraction municipal solid waste management. The findings suggested that the biogas industry growth in Canada relies on provincial energy and waste management policies, advanced technologies for diverting organic waste from landfills, improving biogas yield using existing pretreatment methods, and educating farmers regarding digester operations.


2012 ◽  
pp. 215-228
Author(s):  
Avraam Karagiannidis ◽  
George Perkoulidis ◽  
Apostolos Malamakis

Chemosphere ◽  
2021 ◽  
Vol 280 ◽  
pp. 130601
Author(s):  
Smita S. Kumar ◽  
Pooja Ghosh ◽  
Navish Kataria ◽  
Deepak Kumar ◽  
Sveta Thakur ◽  
...  

2021 ◽  
Vol 290 ◽  
pp. 03002
Author(s):  
Siyan Huang ◽  
Liu Yang ◽  
Lianguo Ji

Sludge is a typical solid waste of sewage treatment plants, and its disposal methods have attracted much attention. This paper summarized the current technical routes for sludge disposal in China, including anaerobic digestion, anaerobic fermentation, incineration, landfill, land utilization, and building materials utilization. In the context of energy saving and carbon reduction and the promotion of resource recovery, enhanced pretreatment technology of sludge anaerobic digestion and anaerobic fermentation technology for fuel gas production are the first choices for sludge disposal and resource utilization. In addition, the development trend of sludge disposal technology was analyzed.


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