A gas filtration system includes a liquid filtering system and a gas transferring system. The non-reciprocal combination-device has a principal direction and includes a first birefringent wedge, a second birefringent wedge, and a non-reciprocal rotating element. The information generator generates regional energy management information for mutually adjusting energy supply between different buildings in the management target region based on the energy management information on the multiple buildings thus acquired. A servicing component can analyze representations of multiple processes within the network service and determines whether to enable initiation and execution of the process based at least in part upon the analysis. A cable is attached to the pulley system and attached to means for retracting and releasing the cable to raise and lower the mounting bracket relative to the wings to remove hide from the carcass. After undergoing such biological treatment, the wastewater is centrifugally separated outside the tank into contaminated portions with lowered and increased concentration of solids therein to respectively undergo filtration within a small volume chamber of the tank and continuous return to a large volume chamber for biological retreatment during operation of the bioreactor system.