Study On Composting With Reversing Air Of Kitchen Waste And Greening Waste And Its Application On Lawn

With the rapid development of urbanization, large amount of kitchen waste andgreening waste are generated, but because the lack of reasonable and effectivemanagement methods and treatment measures of our country, the resulting secondarypollution brings to great harm to the environment. On the other hand, due to the rapiddevelopment of urban greening, serious problems still exist, such as low productivity ofthe soil in urban green space, reduceing the city green flowers and trees growth qualityand increasing the cost of urban greening. According to the characteristics of kitchenwaste and greening waste, with the utilization of resource, harmlessness and shrinkage asa starting point, through the aerobic composting of reversing ventilation to process them.Studying the effects of changes over time in the physical and chemical properties andtemperature, oxygen and greenhouse gases of composting in the different inlet temperatureand ventilation rate, and the application of compost product in gardens and greenbelts, asthe lawn grass grow adding material of the feasibility study.This test to the ventilation rate （1.5m³/h,2.5m³/h,4m³/h） and the inlet temperature（35℃,45℃） for control design for six processing conditions. Research found that thetreatment of compost warming rapidly, the dispose of ventilation rate of2.5m³/h and4m³/h, the compost temperature in50℃above8to13d maintained, meeting the hygieneindexes compost requirements. The impact of the speed of entering the heating stage indifferent inlet temperature is not big. At the end of the compost, due to the compostingdevice is a closed system, resulting in the moisture content in the treatment of materials is40%or more, pH value in different degree, the rise of the organic matter content atorganic fertilizers standard （NY525-2011） requirement, C/N has dropped to below20, theGI of compost products are greater than50%, basically no toxic to plants. The processingof body oxygen concentrations in the compost end back up to20%. The change trend ofthe emissions of CO2and CH₄are increase at first is reduced, the last of the flattenedprocess. But the high concentration of CO2emissions concentrated in the compost earlyand high temperature period, high concentrations of CH₄emissions concentrated incompost early an middle in high temperature period, high temperature and betterventilation rate improve the inlet temperature can promote CO2produced, and ventilationrate is higher （4m³/h） can reduce emissions of CH₄.Using kitchen waste and greening waste composting product as planting matrix adding material, control proup and application of compost set product10%,20%and30%of different substrates. Research shows that, after the application of compost product allcan make for good lolium perenne biological effects, including2#（80%soil+20%compost product） matrix can get the maximum lolium perenne biomass, abovegroundbiomass of the third crop with contrast growth rate of164.3%of the product of processing6, coverage reached98%, the roots of the lolium perenne more developed, can improvethe resistance of the lawn, make the lawn of the quality of a material is obviouslyimproved.