scholarly journals The effect of anaerobic co-fermentation on acidification performance of food waste and cardboard waste

2022 ◽  
Author(s):  
Gu Shiyan ◽  
Zhang Wenyi ◽  
Xing Huige ◽  
Wang Ruji ◽  
Sun Jiyang ◽  
...  
Keyword(s):  
Food Waste ◽  
Methane Production ◽  
Reaction System ◽  
Total Solid ◽  
Caproic Acid ◽  
Added Value ◽  
Normal Operation ◽  
Volatile Acid ◽  
Acid Accumulation ◽  
Stabilization Effect

Abstract The fermentation system with high solid materials for food waste (FW) is uneven in nutrition and easy to produce volatile acid accumulation, which causes the reaction system to acidify and affects the normal operation of fermentation. This study evaluated the effect of the co-substrate percentages (FW:CB = 9:1, FW:CB = 8:2, FW:CB = 7:3) and the initial total solid contents (12%, 15%, 18%) on the co-fermentation acidification performance of FW and cardboard waste (CB). The maximum methane production was obtained when mono-fermenting FW had high solids contents(1.4 L/kg). The methane production increased and then decreased with the increasing percentages of CB. Under the conditions of FW:CB = 8:2, the maximum methane production could reach 3.4 L/kg. The lower methane production (1.8 ∼ 2.5 L/kg) with high percentages of CB (FW:CB = 7:3) was translated into higher yields of caproic acid (up to 26%), which indicated lower percentages of CB had a stabilization effect due to the higher buffering capacities in co-fermentation. As a result, this study demonstrated new possibilities for using CB percentages to control the production of high added-value biogas in dry co-fermentation of FW.

scholarly journals Enhancing methane production from food waste fermentate using biochar: the added value of electrochemical testing in pre-selecting the most effective type of biochar

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
Carolina Cruz Viggi ◽  
Serena Simonetti ◽  
Enza Palma ◽  
Pamela Pagliaccia ◽  
Camilla Braguglia ◽  
...  
Keyword(s):  
Food Waste ◽  
Methane Production ◽  
Added Value ◽  
Electrochemical Testing

Generation and analysis of biogas from kitchen waste at a small scale

2020 ◽  
pp. 140-148
Author(s):  
Md. Kumail Naqvi ◽  
Mrinal Anthwal ◽  
Ravindra Kumar
Keyword(s):  
Food Waste ◽  
Total Solid ◽  
Small Scale ◽  
Cow Dung ◽  
Retention Period ◽  
Household Level ◽  
Replacement Model ◽  
The Everyday ◽  
Scale Experiment ◽  
Small Period

Biogas is the product of anaerobic vitiation of biodegradable matter. This paper focuses on the need of alternative and green sources of energy at a household level and how biogas produced from the everyday organic waste has the potential and possibility to replace LPG cylinders at houses, shops etc. and empower us to step towards an eco-friendly future. The purpose this small-scale experiment has been to find the perfect input matter that is easy to acquire and which produces the maximum amount of gas from minimum input and within small period of waste retention. Four different types of input waste material containing different quantities of cow dung and kitchen food waste were studied through individual experimental setups. Waste was mixed and kept at room temperature and the pH and total solid concentration of the samples were recorded on regular intervals. From the experiment it was found that the optimum yield of biogas at a small scale, based on the parameters such as retention period, pH and total solid con-centration can be obtained by the use of food waste form households and kitchens. The exact composition has been discussed in this paper. The energy generated by the small-scale generator has also been compared to that of an LPG cylinder and an LPG replacement model has also been presented.

Improving methane production and anaerobic digestion stability of food waste by extracting lipids and mixing it with sewage sludge

2017 ◽  
Vol 244 ◽  
pp. 996-1005 ◽  
Author(s):  
Dalal E. Algapani ◽  
Jing Wang ◽  
Wei Qiao ◽  
Min Su ◽  
Andrea Goglio ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Food Waste ◽  
Methane Production

scholarly journals Sustainable Anodes for Lithium- and Sodium-Ion Batteries Based on Coffee Ground-Derived Hard Carbon and Green Binders

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6216
Author(s):  
Hamideh Darjazi ◽  
Antunes Staffolani ◽  
Leonardo Sbrascini ◽  
Luca Bottoni ◽  
Roberto Tossici ◽  
...  
Keyword(s):  
Food Waste ◽  
Anode Materials ◽  
Active Material ◽  
Added Value ◽  
Hard Carbon ◽  
Great Opportunity ◽  
Discharge Performance ◽  
Coffee Ground ◽  
Li Ion ◽  
Charge Discharge

The reuse and recycling of products, leading to the utilization of wastes as key resources in a closed loop, is a great opportunity for the market in terms of added value and reduced environmental impact. In this context, producing carbonaceous anode materials starting from raw materials derived from food waste appears to be a possible approach to enhance the overall sustainability of the energy storage value chain, including Li-ion (LIBs) and Na-ion batteries (NIBs). In this framework, we show the behavior of anodes for LIBs and NIBs prepared with coffee ground-derived hard carbon as active material, combined with green binders such as Na-carboxymethyl cellulose (CMC), alginate (Alg), or polyacrylic acid (PAA). In order to evaluate the effect of the various binders on the charge/discharge performance, structural and electrochemical investigations are carried out. The electrochemical characterization reveals that the alginate-based anode, used for NIBs, delivers much enhanced charge/discharge performance and capacity retention. On the other hand, the use of the CMC-based electrode as LIBs anode delivers the best performance in terms of discharge capacity, while the PAA-based electrode shows enhanced cycling stability. As a result, the utilization of anode materials derived from an abundant food waste, in synergy with the use of green binders and formulations, appears to be a viable opportunity for the development of efficient and sustainable Li-ion and Na-ion batteries.

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