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To address the high cost and low efficiency in treatment of refractory organics in landfill leachate, the treatment efficiency of landfill leachate by microwave-enhanced adsorption and Fenton oxidation was studied. Landfill leachate with high concentration COD and ammonia nitrogen (initial COD and ammonia nitrogen concentration were 33384.17mg/L and 3588.16 mg/L.), which were difficult to be biodegraded...
This paper studied the cutting experiments of dry turning the cemented and hardened steel 20CrMnTi using cemented carbide cutting tools, ceramic cutting tools and PCBN cutting tools. Through measuring the value of surface roughness in varying cutting conditions, analyzed the influence of cutting speed and the feed rate to the surface roughness, obtained two empirical formulas Ra-v and Ra-f. This research...
In order to prevent the glass from scratching and mildewing in storage and transportation, the anti-mildew powder should be added between the glass. For the demand of the powder spraying, the electrostatic powder sprayer control system based on PLC was developed. Spraying constant powder for the middle - part glass of variable thickness realized by controlling two frequency converters respectively...
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