Study on Thermophilic Anaerobic Digestion of Food Waste with Different Concentrations
In order to explore the feasibility of high-temperature anaerobic digestion of food waste,the changes of parame-ters inside anaerobic tanks in the process of thermophilic anaerobic digestion of food waste with different concentrations were studied.Through the experiment of feed load variation in continuous anaerobic fermentation of food waste.And the results showed that,the anaerobic fermentation process of low-concentration food waste slurry is more stable than that of high-con-centration food waste slurry.Drain pulp from food waste can run stably for a long time under COD load of 7.5 kg·m-3d-1 and TS load of 6 kg·m-3 d-1,the volumetric gas production rate of the system can reach 4 m3·m-3 d-1 and long-term sta-ble operation.Compared with the medium temperature anaerobic fermentation of food waste,the high temperature anaerobic fermentation can significantly increase the feed load of the anaerobic tank,thus effectively reducing the size of the anaerobic tank and reducing engineering investment and operating costs.
food wastehigh-temperature anaerobic digestionfeed loadvolumetric gas production rate
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