Plug-flow(Continued modifcation of the conventional plug fow process in which EVent and thus a higher SRT for same volurne as a conventionl plug-How process, Themode by feeding pass so that the solids lood to the secondory clarifier can be minimize Contact stabilization separate knks or compartments for the treat (e)Contact stabilization tivated sludge is mixed with the influent (either row or settled waste liralen ne. Rapid removd of soluble BOD on time is in oncentration Is The two-sludge igh- rate activated for BOD removal followed by a second stage for nitrificotic Paypass op ovide BOD an Nun solids for the nitrification process and promoe focculation and solids D capture industrial grams removal m actve more commonly in a singlo-aludg prooess l所 gh'purily A staged enclosed reoeor is used in the high-purity oxygen activated. 些主,牢 ge to 20 percent in the :h吃Qhk tes n nigh oxygen partic about 2 to 3 times great oxygen gas for with 65M odor control and Voc trigo are rafy reduced quantities of off-gas if th)Kraus process to treat Ft.AnI plug-flow aeration syslem. Besides providing nitrogen, nitrate is available (i)Conventional extended geration The extended o rocess is simil Seondary ne. Because of the long SRTs(20 ho 30 d) and ,'s on the order of 24 h dditionol biosolids stabilization is required to permit beneficio reuse 7-197-19