Production of methane gas from food waste

Background and purpose: Energy recycling from waste is a suitable method for waste management and clean energy production. The aim of this study was to investigate the anaerobic digestion of food waste by microwave preparation at different times and capacities, which ultimately increases anaerobic digestion and methane production.

Investigation of methane production from food waste using microwave irradiation, the effect of irradiation power and time and presentation of process kinetics


Materials and Methods:

In this study, food waste was collected from the restaurant of Bo Ali Sina University and food waste was prepared by microwave before feeding the reactors. In order to prepare food waste, a home microwave with 450 and 630 watts of power was used with microwave irradiation times of 100, 200 and 300 seconds.

The chemical formula of methane gas

Reactors were set up at mesophilic temperature (37 ° C) for 15 days and the values of SCOD (chemical oxygen solution) and TCOD (total chemical oxygen compounds) were set before loading and at the end of the size test. Were taken. Laboratory cumulative methane values were fitted with exponential transactions, Gomper Thesis deformed and logistics with the help of appropriate software, and the best model in terms of maximum value of R2 and minimum value (root mean square error) of RMSE and SSE (sum of error squares) was determined.



Based on the results, the best anaerobic digestion performance, the highest amount of TCOD% / SCOD and the highest methane production were obtained in the microwave power of 630 watts in the irradiation time of 300 seconds. Also, all cumulative methane production curves were fitted with exponential mathematical models, Gomper from the thesis, and geistic fitting.



Increasing the power and time of microwave irradiation increases the solubility of materials and TCOD% / SCOD of food.
Proportional to the increase in TCOD% / SCOD, the amount of daily biogas production also increases. The amount of reduction of TS and VS increases with increasing power and microwave irradiation time. The modified Gomper Thesis model is also a comprehensive and flexible model that fits well with laboratory data and results in a maximum value of R2 and a minimum value of RMSE and SSE.



Hossein Haji Agha Alizadeh – Rahman Seifi – Seyed Abbas Radmard



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