When the grain size of the granulated blast furnace slag is less than 20 μm, the density of the fixing carrier becomes too excessive at the time of baking so that the fixing carrier impairs {HEAD ~ its adherability} for {TAIL ~ the activated sludge} 
for
When the grain size of the granulated blast furnace slag is less than 20 μm , the density of the fixing carrier becomes too excessive at the time of baking so that the fixing carrier impairs { HEAD ~ its adherability } for { TAIL ~ the activated sludge }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL