Studies On City Food Residue Processing

Food residue was generated in the remains of restaurant business, residents and corporate canteens, commonly known as swill. Food residue was solid-liquid mixing, and very sticky. Chemical composition was complicated, mainly including water, inorganic salts, organic acids and a variety of macromolecular organic compounds (protein, starch, cellulose, heteropolysaccharide, fat) etc. As the food residue is rich in organic matter, which is likely to provide a good environment for growth and reproduction to a variety of pathogenic micro-organisms and a variety of pathogenic micro-organisms of the flies carrying insects, resulting in the spread of the disease. In addition, the emissions of waste grease and residue would choke the drainpipe, and pollution the environment. Therefore, it was an urgent priority to stop the proliferation from the source, and process swil in place.In the past , the main exit of food residue was free of charge to be paid for peri-urban pig farmers to feed pigs, slaughter thousands of "garbage pig" at first; Second, waste oil (trench oil) was refining recovery by unscrupulous traders have been, the incorporation of the sale of edible oil. The food residue in most cities was disorderly management and arbitrary disposal, which had become primary pollution source of refuse collection, transport and landfill, seriously affecting cities, the health and environmental quality of residents. To deal with food residue reasonably can not only reduce waste disposal costs, avoid environmental pollution, and increase the social resources, protect the physical and mental health of citizens.On the current status of China, the trench oil often not only produced environmental pollution, and often brought table pollution. This has been difficult for our food regulatory issues to resolve. In this study, trench oil was raw materials for the preparation of biodiesel, which provided a means test for the problem. Preliminary study was executed Alkali catalyzed to preparat biodiesel.This paper discussed cooking, ferment and squeeze and drying have an effect upon protein and water on food residue treatment process, the optimal conditions were that temperature of cooking was 160℃, , time was 30min, fermented solution was15% , vaccination proportion was 1:1 and time was 5 day, pressure of extruding process was 30MPa. The result showed that protein content was 33.5% in the final solid phase, dehydration rate was 74.3%, which was fit for the continuous production of food residue processing enterprises.This paper discussed cooking, enzymatic hydrolysis and squeeze on the removal of oil and water on food residue treatment process, the optimal conditions were that temperature of cooking was 160℃, , time was 30min, cellulose was used in enzymatic hydrolysis and enzyme volume was 5%( the total mass ratio of enzyme to raw materials), time was 20min, pressure of squeeze was 30MPa. The result showed that oil content was 8.7% in the final solid phase, dehydration rate was 74.3%, which was fit for the continuous production of food waste processing enterprises.The optimum technical conditions for food waste extrusion fluid treated by flocculation have now been defined:Adding 1g bentonite and 1g alum when 100ml food waste extrusion fluid is treated。When treating 100ml food waste extrusion fluid at these conditions, COD is from 12654.6mg/L to 504.8mg/L,82.2% of COD can be removedDiscuss ways of prevention and cure fly by food Residue CoMPany。Review effective of fly metamorphosis develop by temperature and humidity, the results indicated that temperature over 45℃and humidity below 60% or over 80% could restrain growing of fly。Methods on hogwash oil with Liquid chromatography by determination of cholesterol content.Cholesterol content of vegetable oil increase with hogwash oil linearly, The results show that when the the cholesterol content in vegetable oil more than 0.05mg/g , Can be clearly observed in cholesterol peak,but edible vegetable oils are not detected cholesterol,so is used to determine the characteristics of vegetable oil as a blending.Waste edible oil is decolorized by bleaching earths, then being saponified .The solution,got from saponification, is changed into precipitate of lead oleale and lead stearate. Using alcohol to seperate lead oleae and lead atearate, then after a series reaction with hydrochloric,acid oleic acid and stearic acid are obtained. The purity of stearic acid is 83%, and oleic acid is separated completely by inspection.