The Fe3O4 nanoparticles-modified mycelium pellet-based anaerobic granular sludge enhanced anaerobic digestion of food waste with high salinity and organic load

2021 ◽  
Author(s):  
Peiqi Cui ◽  
Jiye Ge ◽  
Yingyun Chen ◽  
Yilin Zhao ◽  
Shaojie Wang ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Fe3o4 Nanoparticles ◽  
High Salinity ◽  
Granular Sludge ◽  
Organic Load ◽  
Anaerobic Granular Sludge

Identification of mesophilic and thermophilic fermentative species in anaerobic granular sludge

2006 ◽  
Vol 54 (2) ◽  
pp. 19-24 ◽  
Author(s):  
F. Hernon ◽  
C. Forbes ◽  
E. Colleran
Keyword(s):  
Growth Rate ◽  
Anaerobic Digestion ◽  
Molecular Biology ◽  
Food Waste ◽  
Granular Sludge ◽  
Anaerobic Granular Sludge ◽  
Digestion Process ◽  
Fermentative Bacteria ◽  
Landfill Sites ◽  
Rapid Growth Rate

Large quantities of biodegradable food waste in the form of fruit and vegetables are still being deposited in landfill sites in Ireland. The development of an anaerobic digestion process using fermentative species which degrade the carbohydrate-rich waste could divert the food waste from landfills. We identified fermentative species grown on glucose and sucrose at mesophilic and thermophilic temperatures using molecular biology techniques. The dominating fermentative bacteria of the mesophilic sludge were of the Bacteroidetes and Spirochaetes classes. Although both groups of bacteria are typically fermentative their substrate range appears to be limited. The dominating fermentative bacteria in the thermophilic sludge was Thermoanaerobacterium aotearoense of the Clostridia class. The indications are that Thermoanaerobacterium aotearoense may be highly suitable to biodegrade a carbohydrate-rich influent feed due to its possibly very rapid growth rate and also an extensive substrate range.

scholarly journals Selection of inocula conditioning methodologies for the anaerobic digestion of food waste

2019 ◽  
pp. 9-18
Author(s):  
Brayan Alexis Parra Orobio ◽  
Melkin Nieto Mendoza ◽  
Diego Rivera Henao ◽  
Pablo Cesar Manyoma Vélasquez ◽  
Patricia Torres Lozada
Keyword(s):  
Anaerobic Digestion ◽  
Latin American ◽  
Food Waste ◽  
Multicriteria Analysis ◽  
Granular Sludge ◽  
Methanogenic Activity ◽  
Significant Events ◽  
Hierarchy Process ◽  
Selection Of ◽  
Main Strategy

Food waste (FW) has a high potential for use in biological processes such as anaerobic digestion (AD), especially due to its high content of biodegradable organic matter. To inoculate the reactors, sludge is usually used. The sludge should ideally have good sedimentation and specific methanogenic activity (SMA), which is typical for granular sludge. However, in a Latin American context, the most available and accessible sludges are flocculants with low sedimentation and SMA. Applying technological surveillance between 1975 and 2017, using multicriteria analysis techniques such as analytical hierarchy process (AHP), and consulting with international and national experts, we observed that there were few studies, compared to published studies on the substrates that focused on improving inoculum quality through conditioning to improve its characteristics and maximize methane production. The inoculum-conditioning methodologies identified were grouped into five categories, being the main strategy the addition of nutrients followed by anaerobic digestion with an easily degradable substrate. However, extension of technological surveillance is recommended by incorporating the results published from significant events in the field of anaerobic digestion, such as the Latin American Workshop and Symposium on Anaerobic Digestion and the World Congress on Anaerobic Digestion.

Inhibiting excessive acidification using zero-valent iron in anaerobic digestion of food waste at high organic load rates

2016 ◽  
Vol 211 ◽  
pp. 65-71 ◽  
Author(s):  
Xin Kong ◽  
Yonghong Wei ◽  
Shuang Xu ◽  
Jianguo Liu ◽  
Huan Li ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Zero Valent Iron ◽  
Organic Load

Methane Augmentation of Anaerobic Digestion of Food Waste in the Presence of Fe3O4 and Carbamide Capped Fe3O4 Nanoparticles

2019 ◽  
Vol 11 (8) ◽  
pp. 4093-4107 ◽  
Author(s):  
Asim Ali ◽  
Rasool Bux Mahar ◽  
Syed Tufail Hussain Sherazi
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Fe3o4 Nanoparticles

scholarly journals Effect of yeast addition on the biogas production performance of a food waste anaerobic digestion system

2020 ◽  
Vol 7 (8) ◽  
pp. 200443
Author(s):  
Ming Gao ◽  
Shuang Zhang ◽  
Xinxin Ma ◽  
Weijie Guan ◽  
Na Song ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Biogas Production ◽  
Gas Production ◽  
Production Performance ◽  
Organic Load ◽  
Control Group ◽  
Volatile Solids ◽  
Volatile Organic ◽  
The Stability

Food waste contains numerous easily degradable components, and anaerobic digestion is prone to acidification and instability. This work aimed to investigate the effect of adding yeast on biogas production performance, when substrate is added after biogas production is reduced. The results showed that the daily biogas production increased 520 and 550 ml by adding 2.0% (volatile solids; VS) of activated yeast on the 12th and 37th day of anaerobic digestion, respectively, and the gas production was relatively stable. In the control group without yeast, the increase of gas production was significantly reduced. After the second addition of substrate and yeast, biogas production only increased 60 ml compared with that before the addition. After fermentation, the biogas production of yeast group also increased by 33.2% compared with the control group. Results of the analysis of indicators, such as volatile organic acids, alkalinity and propionic acid, showed that the stability of the anaerobic digestion system of the yeast group was higher. Thus, the yeast group is highly likely to recover normal gas production when the biogas production is reduced, and substrate is added. The results provide a reference for experiments on the industrialization of continuous anaerobic digestion to take tolerable measures when the organic load of the feed fluctuates dramatically.

Determination on Acidification Point during Anaerobic Digestion of Biodegradable Municipal Solid Waste

2014 ◽  
Vol 953-954 ◽  
pp. 163-167
Author(s):  
Ben Lin Dai ◽  
An Feng Zhu ◽  
Fei Hu Mu ◽  
Ning Xu ◽  
Zhen Wu
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Least Squares ◽  
Solid Waste ◽  
Least Squares Method ◽  
Granular Sludge ◽  
Measured Data ◽  
Acid Inhibition ◽  
Anaerobic Granular Sludge

The aim of this work was to investigate the acid inhibition during the anaerobic digestion of municipal solid waste. Four biodegradable substrates of soybean, fat meat, rice and celery cane were considered in this paper. A series of anaerobic co-digestion tests were performed on the four substrates at the load of 1.0gVS/(L•d) and anaerobic granular sludge. The method to calculate the lowest acidification points of the four substrates was provided by the least squares method, and it is verified by the measured data, and good agreements are achieved.

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