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In algae-bacteria symbiotic systems, algae and bacteria work cooperatively to reduce aeration demand and carbon emissions during wastewater treatment.However, controlling and stabilizing microbial communities in the conventional algae-bacteria symbiotic systems are complicated and unstable. We,

In view the fact that the excessive element burning, the powder deflagration and the loose structure of the ZM6 alloy gearbox through laser cladding process, the process and method of homogeneous alloy coating prepared by laser cladding under ultra-low oxygen content was proposed, the good microstructure and mechanical properties of the remanufactured part were verified. The experiment results show that, there are no internal defects such as loose or gas hole in the laser remanufactured zone, the microstructure fineness density of the remanufactured part is close to the original substrate, the element difference is relatively small. The contents of Mg, Zr, Nd, Zn and other major elements remain basically constant. The coating and substrate are mainly composed of equiaxed crystalline grains. The crystalline grains of the coating are obviously finer than those of the substrate, further the precipitation of granular or microspherical intragranular and intergranular strengthening phases is more dispersed and uniform, which is mainly composed of α-Mg and β-Mg12Nd phase composition. There is no obvious coarsening in the heat affected zone. The microhardness from the top layer to the interface is between 56.4~63.2 HV0.1, The microhardness of the heat affected zone is between 54.2~56.4 HV0.1, which are higher than that of other parts of the substrate. The maximum bending load borne of the coating is between 152~167 N, the bending strength is distributed between 205~220 MPa, and the friction coefficient of the coating is distributed between 0.26~0.42. The relevant mechanical properties are meet the remanufacturing standards.