Study On The Effects Of Turning-technique,Water-replenishment And Different Additives On Composting Of Green Waste

In order to research the effects of water-replenishment,turning-technique and different additives on the maturity of green waste compost,this study selected dead branches of spring on Beijing highway as the research object to find out the influence law of indexes of total organic carbon,total nitrogen,pH,EC,GI and compost maturity effect by different compost technique with the method of Aerobic Static Composting,finally screened out the optimal level combination;This study reached the effects of different additives on the physical and chemical properties of compost and composting process and utilized T,high temperature duration,GI,E4/E6 as indicator to select the best additive and provided maturity evaluation with fuzzy mathematical method.The results showed:(1)It has a positive effect in compost with water-replenishment and turning to regulate temperature and humidity.The effect of the turning frequency on the maturity of compost was greater than that of water supply.During the composting,the frequency of water supply should be controlled in a suitable range for too high or too low frequency of water supply is not conducive to promoting the maturity of compost.Increasing the frequency of stack can ensure the oxygen content of the reactor to improve compost maturity.Turning in every 4 days and water-replenishment in every 8 days were the best setting combination.(2)The results showed that the effect of adding manure speed up fermentation efficiency better than urea because of the faster waiming and longer high temperature duration,in the meanwhile,it reflected the lower T value,pH,E4/E6 and the higher GI.Adding microbial agents can accelerate the composting process and improve the living environment to increase maturity.The result showed that the effect of conditioner on compost maturity was more significant than that of microbial agent and enzyme bacteria showed a better effect than Jingpuyuan fermentation of organic waste.(3)The fuzzy mathematics method was used to evaluate the green waste compost,classifying adding chicken manure alone,admixture of chicken manure and Jingpuyuan fermentation of organic waste,admixture of urea and enzyme bacteria,admixture of chicken manure and enzyme bacteria as completely maturity,better maturity,basic maturity and not maturity respectively.Comprehensive effect sorting:admixture of chicken manure and enzyme bacteria>admixture of chicken manure and Jingpuyuan fermentation of organic waste>adding chicken manure alone>admixture of urea and enzyme bacteria.The effect of conditioner on the evaluation result of maturity grade was greater than that of microbial agent and the evaluation results were consistent with the results of physical and chemical indicators.