A plurality of baffles within the vessel slow the effluent so that {HEAD ~ solids} settle out to {TAIL ~ a drain} which is periodically opened to transfer the solids to an appropriate disposal 
settle out to
A plurality of baffles within the vessel slow the effluent so that { HEAD ~ solids } settle out to { TAIL ~ a drain } which is periodically opened to transfer the solids to an appropriate disposal
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH