| Title | The concept of circular economy strategy in food waste management for the optimization of energy production through anaerobic digestion |
|---|---|
| ID_Doc | 4826 |
| Authors | Loizia, P; Neofytou, N; Zorpas, AA |
| Title | The concept of circular economy strategy in food waste management for the optimization of energy production through anaerobic digestion |
| Year | 2019 |
| Published | Environmental Science And Pollution Research, 26, 15 |
| Abstract | Food waste management (FWM) is considered to be an extremely important social issue besides an environmental one. Worldwide, it is estimated that 1.3 billion t/year of foods are disposed of in landfills (including edible and inedible foods). Moreover, FAO indicated that if food waste (FW) was a country, it could be the 3rd biggest CO2 producer after China and the USA with more than 3.5-4.2 billion of t equivalence CO2. Each citizen in the entire EU produces approximately 179kg/year FW equal more or less with 600 Euro/year. This paper focuses on the concept of circular economy (CE) and how can we optimize and improve the production of biogas from UASB-R (upflow anaerobic sludge blanket reactor) using FW and natural minerals (clinoptilolite). The study was elaborated through laboratory scale experiments using different mixtures of FW, liquid waste from slaughterhouse (LWS), and natural clinoptilolite (Cli). The amount of biogas produced and the methane content of biogas were used as indicators in order to monitor and asses the performance of the anaerobic digester. The results of the present study were encouraging towards the use of FW in existing anaerobic treatment plants, suggesting selective collection at source of FW, diversion from landfills, and use as a secondary resource for energy recovery through a transition to a CE. The results indicate that the use of FW with zeolite duplicates the production of CH4 within the same days of production compared with the control sample. |
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