Research Of Household Food Waste Aerobic Biological Treatment

With the improving of urban residents consumption level, the changing of energystructure and eating habits, the proportion of kitchen waste in household waste isincreasing year by year. Kitchen waste with high moisture content, high organic matter,high oil and salt content and other characters, treatment is difficult, also have largepotential in resource utilization. In this paper, the main features of different processingtechniques for household food waste was reviewed; survey of the generate householdwaste data in north and south and the composition of household food waste, also surveyof the treatment will; design orthogonal experiments based on water, agents and reactiontime3factors and water, ventilation and temperature3factors, design a simulatedcontinuous feeding trial, study based on kitchen waste reduction and recycling twodifferent treatment goals, water, temperature, oxygen balanced optimal controlcombination; for household food waste aerobic biological treatment. The main results ofthis study are:(1) The generation of household food waste is about0.22kg per person per day.Kitchen waste composition categories accounted for60%of vegetables, fruits and animaloffal20%of each, the main nutrients of kitchen waste are crude fat, crude fiber and crudeprotein. only12%of residents accept kitchen waste house treatment, do not understand andworry account for83%.(2) Based on different treatment objectives, the dominant affecting factorsdifferent, leading to the optimal combination of parameters will also change. For theorthogonal experiment based on water, agents and response time, if the treatmentgoals for the reduction, the dominant factor in moisture content adjust to70%is theoptimal combination; if the treatment goals for the resource, dominant factor is thereaction time, reaction2days, adjusted to65%moisture content is the optimalcombination.The main innovation of this paper are:(1) Conducted an investigation of kitchen waste generation data and composition,complemented the basic data for future desigh of kitchen waste disposal unit. (2) Through multi-factor multi-level orthogonal test, based on reduction and resourcetreatment goals, reached a different combination of optimized parameters.