Research And Application Of Garden Waste Composting

With the accelerating pace of the ecological city construction, the garden wasteoutput is on the increase. The forbidden of using landfill or incineration method todispose garden waste is the general trend of development. The results show that thegarden waste composting is the main way to achieve its recycling. Firstly, this studycarried out a test on the garden waste composting with Effective Microorganisms. Itresearched the dynamic change process of organic carbon substances in compostingand analyzed the effects of every factor on the composting process and compostmaturity of garden waste. It won the best compost parameters, at the same time, italso provided a reference for the feasibility of composting with using single gardenwaste without other accessories to reduce the mixing costs. The results showed thatadjustment of the bacterial reagent, C/N ratio and turning frequency benefited thedegradation of decomposes such as lignin and cellulose, promoted the accelerationof maturity，and improved the compost quality. Under the composting conditions of4%addition of bacterial reagent,2:1vegetation volume ratio(C/N=30) and one dayturns mow once, the degradation rate of total organic carbon, lignin and cellulosewas18.66%,43.56%and50.96%, the humus content could be increased by13.92%.From efficient microbial agents’ direction, Bacillus Subtilis, Bacillus Polymyxa,Trichoderrna Viride, Phanerochaete Chrysosporium as the experiment bacteriummixed with garden waste in the mixed fermentation. The activity change of four majorenzymes of lignocelluloses and woodiness cellulose degradation rate was analyzed toresearch their influence of garden waste degradation. The results showed that whenthe ratio of Bacillus Subtilis, Bacillus Polymyxa and Phanerochaete Chrysosporiumwas2:2:1in mixed fermentation, the degradation of cellulose and lignin in gardenwaste was prominent, the degradation rate could reach37.36%and80.95%.From the angle of the application of garden waste composting products and theimprovement of saline soil, the garden waste composting products, bentonite clay,hydrolytic polymaleic anhydride as the soil improvement matrix, a compost test withan orthogonal experimental design was conducted in order to research the effects ofthe three soil improvement matrixes on coastal reclaimed soil desalting. The resultsshowed that it could improve soil structure, increase soil porosity, improve soilpermeability, protect fertilizer efficiently when the garden waste composting productsas soil improvement matrix. Under the condition of the garden waste compostingproducts and soil volume ratio to1:3, bentonite addition amount to30g/kg, the soil desalting rate could reach96.88%, and soil organic matter, available nitrogen,effective phosphorus, available potassium increased100.58%,78.75%,112.17%,7.10%respectively.In order to explore the feasibility of garden waste composting products asnursery matrix and its influence on the plant growth, a pot experiment was designed.Through the comprehensive evaluation indexes, the results showed that it couldeffectively promote the growth of plants when added30g/kg calcium-basedbentonite and liquid slag, and garden waste composting products mixed with soil by1:3volume ration.