Restoration of acidified dry anaerobic digestion of food waste: Bioaugmentation of butyric acid-resistant microbes

2022 ◽  
Vol 10 (1) ◽  
pp. 106935
Author(s):  
Jiaxin Lu ◽  
Zhijie Jia ◽  
Pan Wang ◽  
Xinyu Yang ◽  
Peiru Lin ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Butyric Acid ◽  
Food Waste ◽  
Dry Anaerobic Digestion

scholarly journals Significance of Pretreatment in Enhancing the Performance of Dry Anaerobic Digestion of Food Waste: An Insight on Full Scale Implementation Strategy with Theoretical Analogy

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1018
Author(s):  
Vijayalakshmi Arelli ◽  
Sudharshan Juntupally ◽  
Sameena Begum ◽  
Gangagni Rao Anupoju
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Scale Up ◽  
Methane Yield ◽  
Net Energy ◽  
Time Duration ◽  
Methane Generation ◽  
Pre Treatment ◽  
The Impact ◽  
Dry Anaerobic Digestion

The aim of this study was to treat food waste containing 25% total solids (TS) through dry anaerobic digestion (dry AD) process at various pressures (0.5 to 2.5 kg/cm2) and different time duration (20 to 100 min) to understand the impact of pretreatment in enhancing the methane generation potential along with insights on scale up. The findings revealed that vs. reduction and methane yield of 60% and 0.25 L CH4/(g VSadded) can be achieved with pretreated food waste at two kilograms per square centimeter, while pretreatment of food waste at 2 kg/cm2 for 100 min enhanced the vs. reduction from 60% to 85% and methane yield from 0.25 to 0.368 L CH4/(g VSadded). However, the net energy indicated that 40 min of pre -treatment at two kilograms per square centimeter can be a suitable option as methane yield and vs. reduction of 0.272 L CH4/(g VSadded) and 70%, respectively was achieved. The vs. reduction and the methane yield of 45% and 0.14 L CH4/(g VSadded), respectively was obtained from untreated food waste which illustrated that pretreatment had significantly impacted on the enhancement of methane generation and organic matter removal which can make the dry AD process more attractive and feasible at commercial scale.

Dry anaerobic digestion of food waste under mesophilic conditions: Performance and methanogenic community analysis

2013 ◽  
Vol 131 ◽  
pp. 210-217 ◽  
Author(s):  
Si-Kyung Cho ◽  
Wan-Taek Im ◽  
Dong-Hoon Kim ◽  
Moon-Hwan Kim ◽  
Hang-Sik Shin ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Community Analysis ◽  
Methanogenic Community ◽  
Dry Anaerobic Digestion ◽  
Mesophilic Conditions

Effect of Oil Content on Dry Anaerobic Digestion of Food Waste under Mesophilic Conditions

2015 ◽  
Vol 768 ◽  
pp. 281-288
Author(s):  
Lian Hai Ren ◽  
Yan Bing Huang ◽  
Pan Wang
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Oil Content ◽  
Continuous Fermentation ◽  
Biogas Production ◽  
Removal Rate ◽  
Gas Production ◽  
Composition Analysis ◽  
Volatile Solids ◽  
Dry Anaerobic Digestion

The variations of daily biogas yields, cumulative biogas yields, biogas composition analysis, total solids (TS) and volatile solids (VS) were studied in the process of mesophilic and dry anaerobic digestion of food waste under different oil contents (0%, 2%, 4%, 6%, 8%, 10%) at 35 °C. The gas production raised and then went down with the oil content, followed by 243.14, 245.64, 256.09, 269.25, 276.54, 284.22mL /g TS respectively. The research provided a reference for the pretreatment of food waste in follow-up continuous fermentation. Results showed that the period of the process of mesophilic dry anaerobic digestion under oil content of 0% was the shortest, with the total biogas production of 1275.5mL. During the process of the digestion, methane content of the biogas raised and then went down, up to a maximum of 77.62%. The removal rate of TS and VS in food waste with the oil content of 6% was the highest, obtained as 11.2% and 13.2%, respectively.

scholarly journals Dry anaerobic digestion of food waste and cardboard at different substrate loads, solid contents and co-digestion proportions

2017 ◽  
Vol 233 ◽  
pp. 166-175 ◽  
Author(s):  
Gabriel Capson-Tojo ◽  
Eric Trably ◽  
Maxime Rouez ◽  
Marion Crest ◽  
Jean-Philippe Steyer ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Dry Anaerobic Digestion

scholarly journals Hydrolysis of the Kitchen Waste through Dry Anaerobic Digestion - A Sustainable Environmental Practice for its Effective Management

2021 ◽  
Author(s):  
Akanksha Agrawal ◽  
Parmesh Kumar Chaudhari ◽  
Prabir Ghosh
Keyword(s):  
Anaerobic Digestion ◽  
Food Waste ◽  
Retention Time ◽  
Specific Rate ◽  
Human Beings ◽  
Kitchen Waste ◽  
Comparative Performance ◽  
Environmental Practice ◽  
Hydrolysis Of ◽  
Dry Anaerobic Digestion

Abstract Population explosion coupled with rapid industrialization and urbanization has led to accumulation of food waste. Nearly, 1.3 billion tons of food waste has been encountered annually which poses a serious threat to the environment and human beings. Therefore, it has become imperative to look for the sustainable environmental practices to manage huge quantum of the waste. Anaerobic Digestion (AD) has emerged as techno economical viable solution with the aim of resource as well as energy recovery to combat the global energy crisis. In this study, an attempt has been made to study the hydrolysis of kitchen waste through dry anaerobic digestion being a suitable technology for treating organic wastes with varying composition and its superiority over the wet digestion. Laboratory scale batch studies were conducted on kitchen waste using three different dry fermenters of total volume 4-litre operating under mesophilic regime for duration of 32 days. The reactors were simultaneously operated with the retention time of 1 day, 2 day and 4 days, respectively. Comparative performance of leachate generation during hydrolysis reveals that reactor with 1-day retention time generates maximum leachate with high COD of 244 g/l and VFA of 12.99 g/l. The specific rate constants for hydrolysis of kitchen waste through dry fermentation with retention time of 1 day, 2 days, 4 days were found to be 0.063, 0.054 and 0.027 day− 1, respectively.

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