Aerobic biodegradation(Composting) of food wastes

• Main Authors: Kuo-Hsiung Wu, 吳國雄
• Other Authors: I.C.Chang
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/70028115070862201475

碩士 === 國立高雄第一科技大學 === 環境與安全衛生工程所 === 91 === The thesis is to study the effects of operating variables such as the air rate, recycle ratio and agitation on the biodegradation of food wastes in a laboratory reactor. The objective was to find the optimal operating conditions and to reduce the composting time. The experimental results showed that the optimal operating conditions were as follows: air rate1.2L air/kg dry solid-min, recycle ration 16~32% and agitation frequency1/2.This results showed that food waste could be totally biodegraded within 3-4 day in a laboratory reactor. The peak temperature were between 50 and 60 oC, the carbon dioxide production rates were 12~16 grams per kilograms of volatile matters per hour. The average decomposition of total volatile solids loss was 25%. The empirical kinetic model was described by an autocatalytic decomposition equation , which is written as . This thesis showed that food waste could be composted within 3-4 day in a laboratory reactor. The results shall be useful for improving commercial process.