I. INTRODUCTION
Biogas fermentation, as an important method of largescaled
piggery wastes treatment, is dually efficient on
environmental protection and energy resource recovery.
Volume organic loading is an essential parameter for biogas
engineering design and running. It refers to the amount of
organic matters undertook by per unit volume of digestive
apparatus per day. Volume organic loading is associated
with factors such as temperature, raw material and process.
However, most researchers believed that generally the
volume organic loading of swine manure wet fermentation
will not exceed 4.0 kg CODm-3d-1, which is the upper limit
of designed load for engineering oriented swine manure wet
fermentation [1-3]. IC process can improve feed loading of
swine manure. However, since the internal structure of IC
reactor is complicated, may issue on design and
management exist during the application process [4]. How
to improve the load rate of reactor and to minimize the
device volume need to be urgently solved for swine manure
biogas fermentation process. To this end, dry fermentation
of swine manure which is characterized of water
conservation and convenient biogas residue treatment seems
to be indispensable. The process can improve the utilization
rate of equipment, as well as reduce the investment and
running costs through increasing feed concentration