Domestic Wastewater Treatment Mobilization Construction - AskTOP

More documents

Recommendations

Info

EM 1110-3-17211 May 8410080QWQWQJU20JHUWdNOTE : For any side-water depth .60402040 8o 120160 200U . S . Army Corps of EngineersDIAMETER OF CIRCULAR CLARIFIERS, FTFIGURE 8-2 .EFFECTIVE SURFACE AREA AAjUSTMENTS FORINLET-OUTLET LOSSES IN CIRCULAR CLARIFIERS
EM 1110-3-17211 May 84(2) Weir rate . The overflow loading on weirs will not exceed5,000 gpd per lineal foot for plants designed for less than 0 .1 mgd, or10,000 gpd per lineal foot for plants designed between 0 .1 and 1 .0 mgd .Weir loading for plants designed for flows of more than 1 .0 mgd may behigher, but must not exceed 12,000 gpd per lineal foot . When pumpingis required, the pump capacity will be related to tank design to avoidexcessive weir loadings .(3) Typical design . Example A-1 illustrates a typical clarifierdesign .8-4 . Tank types and design features .a . General features . Inlets to a settling tank will be designed todissipate the inlet velocity, to distribute the flow uniformly, and toprevent short-circuiting . The inlet and outlet channels will bedesigned for a minimum velocity of 2 fps at the average flow rate andwill have corners filleted to prevent deposition and collection ofsolids . Tanks can be circular or rectangular . Side water depthsshould be a minimum of 6 feet and a maximum of 10 feet . A 2 to 4 footadditional depth should be provided for the sludge blanket . Limit theuse of circular clarifiers to applications greater than 25 footdiameter . Where space permits, at least two units will be provided .b . Rectangular tanks . The minimum length of flow from inlet tooutlet of a rectangular tank will be 10 feet in order to preventshort-circuiting of flow in the tank . Tank length-to-width ratioshould vary between 3 :1 and 5 :1 . Tanks will be designed with a minimumside water depth of 7 feet, except final tanks in activated sludgeplants, which will be designed with a 9-foot minimum depth .(1) Inlets and outlets . Inlets to rectangular tanks will bedesigned so as to prevent channeling of wastewater in the tank .Submerged ports, uniformly spaced in the inlet channel, are aneffective means of securing distribution without deposition orchanneling . Outlet overflow weirs used in rectangular tanks will be ofthe adjustable type, and serrated weirs are preferred over straightones . Overflow weirs will be used in most cases .(2) Collection and removal of scum and sludge . Means for thecollection and removal of scum and sludge are required for all settlingtanks . The removal of scum from the tank will take place immediatelyahead of the outlet weirs and the equipment may be automatic or manualin operation . Provisions will be made for the scum to be discharged toa separate well or sump so that it can be either sent to the digesteror disposed of separately . Rectangular tanks will be provided withscum troughs with the crest about 1 inch above maximum water surfaceelevation . For small installations (less than 1 .0 mgd), hand-tilttroughs consisting of a horizontal, slotted pipe that can be rotated bya lever or screw will be used . Proven mechanical scum removal devices8-5
Page 5: EM 1110-3-17211 May 84ParagraphPage
Page 10 and 11: Vadophil - Auction No. : 18Lot No.
Page 14 and 15: Table 3-1 . Evaluation of Wastewate
Page 17 and 18: Table 3-1 . Evaluation of Wastewate
Page 19 and 20: Table 3-2 . Approximate Performance
Page 21 and 22: EM 1110-3-17211 May 844-3 . Estimat
Page 23 and 24: EM 1110-3-17211 May 84c . Industria
Page 25 and 26: EM 1110-3-17211 May 84d . Treatment
Page 27 and 28: EM 1110-3-17211 May 84CHAPTER 5SELE
Page 29 and 30: EM 1110-3-17211 May 84zWJWWWU . S .
Page 31 and 32: EM 1110-3-17211 May 84CHAPTER 6FLOW
Page 33 and 34: EM 1110-3-17211 May 84WATER SURFACE
Page 35 and 36: EM 1110-3-17211 May 847-1 . General
Page 37 and 38: EM 1110-3-17211 May 84channel shoul
Page 39 and 40: EM 1110-3-17211 May 84_cfs = net ar
Page 41 and 42: EM 1110-3-17211 May 848-3 . Design
Page 43: EM 1110-3-17211 May 8410080QWQW60NO
Page 47 and 48: EM 1110-3-17211 May 84Table 8-3 .Ty
Page 49 and 50: No Discharge DischargeSeries-parall
Page 51 and 52: EM 1110-3-17211 May 84dispersed oxy
Page 53 and 54: EM 1110-3-17211 May 84a . Inlet . I
Page 55 and 56: EM 1110-3-17211 May 84CHAPTER 10TRI
Page 57 and 58: SINGLE-STAGEREM 1110-3-1721 1 May 8
Page 59 and 60: EM 1110-3-17211 May 84(5) Periphera
Page 61 and 62: EM 1110-3-17211 May 84K20 = Treatab
Page 63 and 64: EM 1110-3-172'll May 84Table 10-3 .
Page 65 and 66: EM 1110-3-17211 May 84CHAPTER 11ACT
Page 67 and 68: EM 1110-3-17211 May 84RAW14ASTEWATE
Page 69 and 70: EM 1110-3-17211 May 84being wasted
Page 71 and 72: EM 1110-3-17211 May 84a . Air requi
Page 73 and 74: EM 1110-3-17211 May 84with unique,
Page 75 and 76: EM 1110-3-17211 May 84Contact Stabi
Page 77 and 78: EM 1110-3-17211 May 8412-3 . Sludge
Page 79 and 80: EM 1110-3-17211 May 84Table 12-1 .A
Page 81 and 82: EM 1110-3-17211 May 84Table 12-3 .H
Page 83 and 84: EM 1110-3-17211 May 84requirements
Page 85 and 86: EM 1110-3-1721 1 May 84b . Landfill
Page 87 and 88: EM 1110-3-1721 1 May 84Table 13-1 .
Page 89 and 90: EM 1110-3-17211 May 84(2) Inspectio
Page 91 and 92: EM 1110-3-17211 May 84CHAPTER 14SMA
Page 93 and 94: EM 1110-3-17211 May 84CHAPTER 15SAF
Page 95 and 96:
EM 1110-3-17211 May 84g . A portabl
Page 97 and 98:
EM 1110- 3-17211 May 84Weight Remov
Page 99 and 100:
EM 1110-3-17211 May 84requirements
Page 101 and 102:
EM 1110-3-17211 May 84With a filter
Page 103 and 104:
E14 1110-3-17211 May 84Overall effi
Page 105 and 106:
EM 1110-3-17211 May 84therefore,0 .
Page 107 and 108:
EM 1110-3-17211 May 84Aeration requ
Page 109 and 110:
EM 1110- 3-17211 May 84Gas yield =
Page 111 and 112:
1110-3-172' .1'i1 May 8-4Pressure a
Page 113 and 114:
SM '11,10-1-472may 84be needed unde
Page 115 and 116:
EM 1110-3-17211 May 84APPENDIX BOXY
Page 117:
Ek'1110-i;, 3-;47211 May 84Chlorine
show all

Domestic Wastewater Treatment Mobilization Construction - AskTOP

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?