高手帮忙翻译一下，谢谢了

Four test results and analysis
4.1 Structural Parameters on the impact of operating parameters
Early in the experiment, used for overflow from the mouth of the caliber 12mm, 8mm population at the end of flow of the caliber of the structure, as opposed to the late overflow 12mm, at the end of the stream mouth to 6mm diameter of the structure of the mouth at the same inlet flow conditions its at the end of stream flow in the mouth at the end of the 6mm diameter for the case of significantly reduced.
Flow before and after transformation
After the transformation, the pressure of imports increased significantly, and at the end than the inlet flow and significantly reduced, the benefit of regulation and control of activated sludge reflux ratio.
4.2 Effect of operating parameters on the separation of the effects of
Carried out in the early experimental group are relatively more flow into the mouth of the overflow stream at the end of the mouth, as well as the flow of population in different concentration of isolated cases, the effect of activated sludge.
Operating parameters on the separation effect

From the above comparison chart that as the flow increases, its separation efficiency is also improved.
4.3 Effect of flocculant on the impact of separation
4.3.1 Flocculant in Hydrocyclone Separation Process
40L of water in about 50ml were added and 100ml to 1% concentration of polyacrylamide coagulant. To some extent, the effect of increased separation, but the amount of the use of 50ml and 100ml no obvious gap. When the amount of 50ml may be reaching capacity.
After adding 50ml of separation coagulant

After adding 100ml of the separation of coagulant effect
4.3.2 Hydrocyclone floc in the broken case after
In the polyacrylamide flocculant dosing before and after, we made a settlement of the sludge experiments
B chart for the settlement of pre-coagulation effect, C is not carried out after coagulation swirl effect at the time of the settlement, D for the sludge in the water after the cyclone effect of the settlement. Comparison of these three forms of the settlement results can be seen after the addition of flocculant particles have a certain degree of flocculation, in 0.15m/min not the speed of sludge coagulant dosing the majority of particles have been the end of the settlement, and the dosage When post-coagulant swirl swirl before or after the 0.5m/min speeds can reach most of the settlement of the sludge, after the cyclone has not been a noticeable phenomenon of floc fragmentation.
4.4 Structural Parameters on the effect of separation
Early experiments in the overflow population of the caliber 12mm, 8mm at the end of the stream mouth to speak with one voice, at the end of the concentration of flow I can only achieve the overflow concentration of 1 ~ 2 times. Cyclone after the transformation of the structure will be changed to overflow its 12mm, at the end of flow port for 6mm, improved separation efficiency, the concentration of population at the end of stream overflow sludge can reach concentrations of 2 to 3 times. Reduce the cyclone diameter at the end of flow separation can increase the effect of sludge.
I modified the end of the pre-flow separation
I modified the end of the flow separation
4.5 Conclusion
4.6.1 Selection of a small cone angle used in sludge dewatering hydrocyclone operation feasible, in some cases better separation
4.6.2 Study on the Separation of flocculant to a certain degree of effect, but the effect is not obvious that, in the use of sewage sludge may cause secondary pollution, so I do not recommend the use of
4.6.3 changing the operating parameters and structural parameters, under the same conditions to change the flow at the end of the effect of the mouth of the largest
V. Prospects for industrial applications
In the present activated sludge wastewater treatment process, mainly the application of secondary sedimentation tank of the onclick = "g ( '');"> aeration aeration tank of water from the separation. This will return a higher concentration of the sludge return flow less, can reduce the load of the primary sedimentation tank and a secondary sedimentation tank to reduce the handling capacity, to a certain extent also can reduce the secondary sedimentation tank of the load.
Hydrocyclone used alone to some extent in the sludge flocs will break, but into the secondary sedimentation tank in between the dosage of certain drugs to enable them to re-flocculation, and compared with the secondary sedimentation tank have a certain energy . However, dealing with high efficiency, better separation, and covers an area smaller than a lot of secondary sedimentation tank. Therefore can be used in onclick = "g ( '');"> aeration aeration tank and between the secondary sedimentation tank and improve separation efficiency, and reduce the effective area of the plant, for the basis of the original increase water treatment capacity, the selection of hydrocyclone instead of secondary sedimentation tank is also a good choice. In today's environmentally-friendly construction, hydrocyclones will be used more and more environmentally-friendly construction.