Survey On The Recycling Status Of Beijing Garden Waste And Study On Garden Waste Composting

With the construction of eco-city and the expanding of urban green area, the number of garden waste is getting more numerous and has bring big challenge for urber garbage treatment.Based on the survey of Beijing garden waste recycling situation, the results showed that the waste was numerous while the recycling rate was very low. By studying the recycling situation of the green waste in some developed cities at home and abroad, the article aimed to find the inadequate treatment way for garden waste in Beijing. Experiments were carried out to find the different changes during garden waste composting by adding charcoal and EM agents and to find the different growth status of Calibrachoa, Coleus and Begonia planted in matrix by adding different proportion of garden waste composting. The results showed:The compost temperature was significant increased and maintained in the high level by adding charcoal; Adding EM agents which was more obvious and charcoal during composting can both reduce the pH value and the EC values;By adding charcoal and EM agents, the nitrogen loss was reduce in compost while the contents of phosphorus, potassium, humic acid as well as the degradation ratio of organic matter were increased; By adding charcoal in compost, the smell was significantly eliminated and final product aeration porosity as well as GI value were increased while C/N value was decreased.Significantly increased in growth status were found in the Calibrachoa, Coleus and Begonia planted in matrix by adding different proportion of compost. The treatment-2 was the best treatment for Calibrachoa and Begonia with 30% compost and 70% soil; the treatment-3 was the best for Coleus with 50% compost and 50% soil.The results of composting and pot experiment can be the theoretical basis for the composting of Beijing garden waste.