Taking active carbon and ceramics grain as vector particles,using the method of fast discharging sludge and forming biofilm,the inlet air and wastewater were enlarged gradually until the concentration of COD of outlet reach the low level.

Taking activated carbon as biological carrier,using the method of fast discharging sludge and forming biofilm,domestic sewerage were treated by the technology of three-phase bio-fluidized bed.

Influence of slurry property on filter-cake quality on working face of slurry shield;

So it is very important to build up a filter-cake to protect the working face,especially in highly permeable ground where the slurry is easy to penetrate the ground without allowing to build up the required support pressure.

Based on the actual application to wastewater treatment in food industry, this paper states the characteristics of membrane separation activated sludge process, such as high load activated sludge, stable effluent quality, quick biochemical reaction velocity, small occupation area and simple maintenance management.