Experimental Research on Water Droplet Erosion Resistance Characteristics of Turbine Blade Substrate and Strengthened Layers Materials.

In this paper, the water droplet erosion (WDE) performance of typical martensitic precipitation substrate 0Cr17Ni4Cu4Nb in steam turbine final stage, laser solid solution strengthened sample, laser cladding sample and brazed stellite alloy samples have been studied based on a high-speed rotating waterjet test system. The WDE resistance of several materials from strong to weak is in sequence: Brazed stellite alloy > laser cladding sample > laser solid solution sample > martensitic substrate. Furthermore, the WDE resistance mechanism and the failure mode of brazed stellite alloy have been revealed.

Enhanced nitrogen removal of low C/N wastewater in constructed wetlands with co-immobilizing solid carbon source and denitrifying bacteria.

The denitrification process for treating low carbon/nitrogen (C/N) wastewater in horizontal subsurface flow constructed wetlands (CWs) is often restricted by the carbon source and both abundance and activity of denitrifying bacteria. In this study, the effects of rice husks or immobilized Pseudomonas fluorescens on N removal were investigated under various conditions in a synthetic wastewater solution. CW mesocosms were added with granules formed by co-immobilizing rice husks and P.