The studies on leave protein of Betula platyphylla seedlings by the methods of SDS PAGE electrophoresis and dimensional gel electrophoresis was concerned. The result indicated that some new proteins such as 29kD pI4 3...The studies on leave protein of Betula platyphylla seedlings by the methods of SDS PAGE electrophoresis and dimensional gel electrophoresis was concerned. The result indicated that some new proteins such as 29kD pI4 3, 29kD pI4 2, 14kD pI5 3 and 11 5kD pI5 16 protein point were induced by soil drought stress, and some protein disappeared, for instance four protein between 12 4～11 5kD pI5 8～6 44 in seedlings leaves of B. platyphylla during soil drought stress.展开更多
The treatment of landfill leachate obtained from municipal solid waste(MSW) by using a lab-scale sequencing batch reactor(SBR) was studied.The aim of achieving and stabilizing partial nitrification and denitrification...The treatment of landfill leachate obtained from municipal solid waste(MSW) by using a lab-scale sequencing batch reactor(SBR) was studied.The aim of achieving and stabilizing partial nitrification and denitrification and the characteristics of advanced nitrogen removal were investigated.The experimental results showed that for 95 days running,stable partial nitrification with nitrite accumulation rate above 92.5% was achieved and maintained successfully.The stable biological nitrogen removal via partial nitrification and denitrification was realized and the average removal efficiency of NH+4-N and TN were above 97.2% and 91.7%,respectively.The DO,ORP and pH could be used as the process control parameters for SBR reactor,because the characteristic points on the profiles indicated exactly the nitrification and denitrification end point.The nitrite oxidizing bacteria(NOB) was more sensitive than ammonia oxidizing bacteria(AOB) to the free ammonia(FA) and free nitrite acid(FNA),so the activity of NOB was inhibited by the synergetic effect of highly concentrated FA and FNA in the SBR nitrification.Furthermore,the key factor of achieving and stabilizing partial nitrification and denitrification for a long time was optimization of nitrifying microbial population by the assistance of process control,which was proved by FISH analysis.展开更多
文摘The studies on leave protein of Betula platyphylla seedlings by the methods of SDS PAGE electrophoresis and dimensional gel electrophoresis was concerned. The result indicated that some new proteins such as 29kD pI4 3, 29kD pI4 2, 14kD pI5 3 and 11 5kD pI5 16 protein point were induced by soil drought stress, and some protein disappeared, for instance four protein between 12 4～11 5kD pI5 8～6 44 in seedlings leaves of B. platyphylla during soil drought stress.
文摘对于有机朗肯循环(Organic Rankine cycle,ORC)系统,膨胀机的选择对系统性能的影响至关重要。单螺杆膨胀机作为一种新型的容积式膨胀机,非常适用于中小型ORC系统。为了研究单螺杆膨胀机在ORC系统中的性能,搭建完成以烟气为热源、R123为循环工质的ORC系统试验台。通过改变单螺杆膨胀机的输出转矩和背压以及有机工质的蒸汽干度,获得单螺杆膨胀机相应性能的变化,并得到单螺杆膨胀机的最大输出功率为5.46 k W,最大总效率和容积效率分别为48.7%和80%。试验结果表明,在热源不变的条件下,单螺杆膨胀机的膨胀比随着转矩的增加、干度的增加而增加,而随着背压的增加而降低;容积效率随着转矩的增加和干度的增加均为下降;单螺杆膨胀机的总效率随着背压和干度的增加而降低,而随着转矩的增加先增加而降低。
文摘The treatment of landfill leachate obtained from municipal solid waste(MSW) by using a lab-scale sequencing batch reactor(SBR) was studied.The aim of achieving and stabilizing partial nitrification and denitrification and the characteristics of advanced nitrogen removal were investigated.The experimental results showed that for 95 days running,stable partial nitrification with nitrite accumulation rate above 92.5% was achieved and maintained successfully.The stable biological nitrogen removal via partial nitrification and denitrification was realized and the average removal efficiency of NH+4-N and TN were above 97.2% and 91.7%,respectively.The DO,ORP and pH could be used as the process control parameters for SBR reactor,because the characteristic points on the profiles indicated exactly the nitrification and denitrification end point.The nitrite oxidizing bacteria(NOB) was more sensitive than ammonia oxidizing bacteria(AOB) to the free ammonia(FA) and free nitrite acid(FNA),so the activity of NOB was inhibited by the synergetic effect of highly concentrated FA and FNA in the SBR nitrification.Furthermore,the key factor of achieving and stabilizing partial nitrification and denitrification for a long time was optimization of nitrifying microbial population by the assistance of process control,which was proved by FISH analysis.
