Effects Of Adding Superphosphate And Bacteria Agent On Green Waste Composting

In order to investigate the influence of superphosphate and bacteria agent,which are always used in agricultural waste compost,on the green waste composting.We take the green waste as composting raw materials,simulated high temperature aerobic composting experiment in the lab.We adopted the method of indicates feature observation,dynamic sampling and laboratory samples testing to study the material decomposition and physicochemical properties changes during the composting process.We used composting property index parameters,such as temperature,pH value,EC value,C/N radio,HI(Humification Index),Germination Index(GI),total nitrogen(TN),total phosphor(TP),et al,to study the influence of adding different doses of superphosphate and different doses of three microbial agents on composting process and effectsThe results showed:(1)The best treatment of the indoor simulation green waste composting was the addition of 3%superphosphate and 0.1%enzyme bacteria(T1).The dose of superphosphate had the greatest impact on the composting effect,followed by the bacterial species.The addition of superphosphate and microbial agents had a significant effect on reducing E4/E6,C/N ratio and increasing EC value.The GI of all treatments were greater than 80%,indicating that the compost products of all treatments did not have plant toxic substance.Both superphosphate and bacteria agent can promote the process of composting of green waste.Both superphosphate and bacteria agent can increase the days of high temperature period and decrease the C/N radio.It had the highest temperature of 56.0?,when adding 6%superphosphate and 0.2%enzyme microorganism.(2)Adding superphosphate and bacteria can significantly eliminate the odor escaping and improve the composting environment.Adding superphosphate and bacteria can increase the total nitrogen content of composting products by 19.42%-35.88%,and increase the total phosphorus content by 46.39%?207.87%.The lowest nitrogrn loss rate of the compostings was 24.39%,when the addition was 6%superphosphate and 0.4%Qiangxing bacteria.(3)Principal component analysis results showed that four principal components replace 11 physicochemical indexes of composting and we got integrated score.Using the integrated score as an indicator for the range analysis,the effect of superphosphate on composting of green waste is greater than that of bacterial agent and additive amount of bacterial agent.The study showed that the best formula for using superphosphate and microbial agents in green waste composting was to add 3%superphosphate and 0.4%enzyme bacteria.