SU0014609 - Laserfiche WebLink

Home Browse Search

SECTION J - SANITARY SEWER TREATMENT PLANT EQUIPMENT SPECIFICATIONS Package type extruded aeration sewage treatment plant with electrical controls. The plant shall be Aer-O-Flo Model S-850-710-15 as manufactur- ed by the Clow Waste Treatment Division, Florence, Kentucky or approved equivalent, capable of treating 85000 G.P.D. domestic sewage of 240 parts per million 5-day B.O.D. The plant will be equipped with: AERATION CHAMBER Shall' be of sufficient capacity to provide a minimum 24 hour period of retention, the aeration chamber shall be constructed with air diffusers placed longitudin- ally along one side of the chamber so as to, in conjunction with the flow control baffles, enhance the spiral rotation of chamber contents. The proportion of chamber width to depth, in direction of rotation, shal I not exceed 1 .33 to 1 and shall be in such proportion that the velocity of rotation so promoted shall be sufficient to scour the chamber's bottom and prevent sludge filleting. Bar screens with ;" bars spaced one inch apart shall be installed at the influent port. Aero-Flo Comminutor Model A5 as manufactured by Clow Corporation of Florence, Kentucky or approved equivalent. The comminu- tor gear motor shall be of 1/3 HP, and shall be mounted directly on sewage girder. AIR DIFFUSION Diffuser air shall be supplied by two positive displacement blowers each of ample size based on B.O.D. application to provide a minimum of 2, 100 cubic feet of air per pound of B.O.D. applied. CLARIFIER CHAMBER The clarifier chamber shall be of ample size to provide a minimum of 4 hours retention. Based upon 85000 G.P.D. the bottom of the chamber shall be formed into inverted pyramidal hoppers with flat bottom area being not greater than one square foot. Slope of hopper walls shall not be less than 1 .7 vertical to 1.0 horizontal. AIRLIFT SLJM WS P" ,ly`'1 r! 7 There shall `ifistalled within the clarifier chamber two 3" imum dia- meter airlift sludge return assemblies. The airlift PumpAaR'I have a re- circulation capacity of 0%.to.:100% of 85000 G.P.D. Air line supplying air to the pum I#i.,lrpe quipped with a needle valve to carry the amount of air to each pu , � N�Yf .jW&j3s shall.be-.equipped-with a cleanout plug. Owrrvr ................. ❑ Engineer' .....,... ............................... L3 Other Architect .... -••............................................... -35-.. .... ...... ...