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Waste from a sugar factory include bagasse, filter cake
The thick layer of material on the screen also acts as a filter cake
and presses water out, as well as traps fine particles that would be lost in a thin layer screening process.
To reduce of the protein hydrolysate content we included washing of the filter cake
. Enzyme hydrolysis is environmentally friendly.
The pressurized slurry system plays an important role in the stability of the excavation face associated with filter cake
in slurry shields [1-4].
With the filter cake
, a more manageable product is produced for transportation--minimizing water weight.
Meanwhile, both the reduction in fluid loss and the improvement in compactness of filter cake
rely on the adsorption of carboxyl groups on the surface of cement grains and hydration products [11, 15].
After the fluid loss test, the filter cake
of the sample was covered with a layer of gold and imaged in a scanning electron microscope (Quanta 450, FEI Co, USA) to analyze the microstructure.
The main problems are fractures strong stress sensitivity, and low return permeability of the filter cake
after natural flowback and chemical break down [5-13].
As a consequence, an increase was observed in the total consumption of pesticides for this crop as well as in the amount of plant-generated by-products or residues such as bagasse, filter cake
, vinasse, and boiler ash, which are usually disposed on the ground.
According to the "filter cake
theory", which is applicable to all filters, the cake in fact provides some protection to the filter medium and acts as a filter itself.