SANITARY SEWAGE SYSTEM RECOVERY ASSESSMENT

File: 011696_129_15_036.txt
Page: 036
Total Pages: 71





                  passes. through two grit chambers followed by preaeration
                  basins. The Extension Plant flow scheme is very similar to
                  the old Plant treatment flow train - first stage aeration
                  -basins followed by fir@t stage clarifiers (3 each) followed by
                  second stage aeration and second stage clarification. The
                  primary difference between the old Plant and the Extension
                  Plant is thd type of aeration equipment used. The Old Plant
                  is equipped with bubble diffusers and the extension plant is
                  equipped with platform mounted. mechanical surface aerators.
                  The secondary treated ef f luent , as with the old plant.- passes
                  into the tertiary treatment system or is discharged to the
                  Gulf without further treatment.        Any by-pass capability
                  associated with the extension plant is not identified.

                        (c)    Tertiary Treatment Plant.      Due to the severe
                  shortage of fresh water resources near Kuwait city, tertiary
                  treated effluent is a valuable resource which has been used
                  for a variety of agricultural and beautification initiatives.
                  The tertiary treated ef f luent discharged from the Ardiya Plant
                  ]provides a major -resource of - water to support these.
                  initiatives.

                       The tertiary treatment plant consists of flow metering
                                                      sand filter
                  prechlorination., twelve rapid                     units, pos
                  chlorination, effluent holding tanks and effluent pumps.

                       (d)   sludge Handling/Trehtment Facilities. Because of
                  recommendations made regarding the short term modifications -to
d the existing
                  sludge handling scheme and piping arrangement.'            Sludge
                  handling at the old and Extension plant differ. Old Plant:
                  First stage is either returned to the f irst stage aeration
                  process or is wasted to the sludge treatment. Second stage
                  sludge is returned to the second stage aeration basin or is.
                  combined with the first stage sludge and returned to the first
                  stage. aeration basins.    There is no direct wasting if the
                  second stage sludge. Wastdd sludge is gravity'thickened prior-
                  to anaerobic digestion. It -is routed to sanddrying     beds for
                  dewaterirxg and then landf illed. A belt filter press system to
                  deiiater the digested sludge has been installed but has not
                  been used extensively.     Digester gas may be stored in gas
                  holding tanks or wasted.

                       Extension Plant. First stage sludge is returned either
                  to the pieaeration basins or to the first stage aeration
                  basins, or it is wasted to the sludge treatment process.
                  Sludg6 from the second stage is recirculated to either the
                  first or second stage aeration basins.      There is no direct
                  wasting of second stage sludge.         The remainder of the
                  sludge/gas handling 'process is common      to the old Plaint
                  equipment.


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Box ID = BX000000
Unit = CONST ENG LABS  
Parent Organization = CORPS OF ENGS   
Folder Title = SANITARY SEWAGE SYSTEM RECOVERY ASSESSMENT                                                      
Subject = SANITARY SEWAGE SYSTEM RECOVERY ASSESSMENT
Document Number =        129
Image file name = 00000037.tif