Language：English   Publisher：PERGAMON-ELSEVIER SCIENCE LTD  

The performance of a garbage disposal system to solubilize and mineralize food wastes through biological solubilization was evaluated through the examination of the effects of operational conditions like water supply volume, water supply frequency and aeration on the amount of waste solubilized, mineralized and accumulated in the reactor. The biological solubilization process consisted of a solubilization reactor and a circulation tank. Food waste and fresh water were supplied! into the solubilization reactor with support media. Wastewater from the solubilization reactor was discharged to the circulation tank and water in the circulation tank was periodically pumped back to the solubilization reactor. In case of the total food waste loading of 16 kg m(3-1) d(-1), little carbon (0-5.7%) accumulated in the reactor as long as the system was kept under aerobic condition through large volume of water supply (higher than 3.51h(-1)) or applying aeration in the circulation tank. However, 42% of the loaded carbon accumulated under anaerobic condition in low water supply (less than 1.81h(-1)). The rest of the waste was either solubilized or mineralized. The aeration in the circulation tank, therefore, was effective to provide similar solubilization and mineralization as the large volume of water supply. However, frequency of feeding at the large volume of water supply had no significant effect on the amount of waste solubilization and mineralization. (C) 2004 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.chemosphere.2004.08.092

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Language：English   Publisher：Japan Society on Water Environment  

Biological solubilization and mineralization process was proposed for food wastes. In the process food wastes are mixed with rice hull as biological support medium under wet condition and are solubilized or mineralized. The purposes of the study are to operate the biological solubilization and mineralization process without accumulation of food wastes and to increase mineralization rate for the reduction of organic loading to the sewerage system. Biological solubilization and mineralization process was operated without the accumulation of food waste by aeration in the circulation tank. The process can reduce organic loading to the sewage system to half by aeration in the circulation tank and 80 % by installing biofilm into the circulation tank. The process combined with biofilter would not require further treatment of effluent.

DOI： 10.2965/jwet.2004.57

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