In order to ensure when raising the carding machine production,it has enough carding degree and cleaning efficiency,many methods are taken such as enlarging combing surface,add carding plate,fastness flat,three taker-in and so on.

Analyzing functions and significance of the index, we propose a novel method to assess impurity cleaning effect in accordance with three aspects: neatness of output products, loss of spinnable fibers, and injury of spinnable fibers.

Individual electrostatic precipitator (ESP) and individual bag filter exhibit low collection efficiency of submicron particles with aerodynamic diameter of 0.

Finally,through the actual test,unit's collection efficiency reaches above 99.

Ionic wind deduced from corona discharge in wire-to-plate type electrostatic precipitator(ESP) enhanced particle migration velocity and had great influence on collection efficiency.

The relationship between the removal efficiency and the applied voltage was established.

Biotrickling filters were used to remove volatile organic compounds (VOCs) with removal efficiency affected by many factors including biofilm media, nutrient supply and incoming gas flow rate, which was supposed to help choose suitable parameters to design and operate biotrickling filters for VOCs removal.

This study discussed the effect of applied voltage on the removal efficiency and electrical energy consumption of electrokinetic remediation kaolin polluted by hexavalent chromium at laboratory scale.