Metcalf_and_Eddy__Design_tables

Metcalf_and_Eddy__Design_tables - .WASIEWME Treatme,m';.;...

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Unformatted text preview: .WASIEWME Treatme,m';.; .. I; ‘ METc-ALF ,, .w '* WWW- 5 i “go Tchobdnogloub , 'érofemrofcw Baum»! Univgrsity a! Cam, Davis Franklln L.” Burton ‘ Vie: Piesitk'hf, Retired Metealf & Eddy, Inc. McGume 3.1M SmPnnciIco Aucklmd m Cm L'ubnn Lnndm Madrid Mexico Milan Mound NewDelhi Pain SmM‘V’SW ‘ ’ Sydney Tokyo m 10-30 VTypical design parameters for stabilization ponds TYPO 0' Pond Flow regrrne Intermittentiy intermittemiy lmermillently Mixed Completely mixed . mixed mixed surlaee layer mered Pond size, acres <10 0.5-2 2—10 2-10 05-2 2—10 multiples multipies mult'ples multiples r nulli'ples Operation‘ - V Series or Series Series or Series or Series Series or parallel parallel parallel parallel ' Detention iimefd - - 10—40 4-6 5—20 5—00 v 20-50 3-10 Depth, it 3—4 1-1.5 3—5 - 4—8 8—16 =6-zo pl-l sis—10.5 6.5—10.5 6.5—10.5 6.5-0.5 0.5—7.2 6.5-80 Ternperamre range, °c ~ 0—30 5—30 0—30 0-50 6-50 0-30 Optirrum temperature, °c . 20 20 20, '20 a so 20 8005 leading,de - d 00-120 ' 80—160 s 15 50-100 200—500 ‘ 3005 oomersion. % 80-95 00-95 60—80 00—05 50—35 - 80-95 PM W N983. 002,- N988. COzr » A1930. 002. “9". 002. C02. 0H4. 7002. bacierial baelerial celi bacterial cm. haul-rial. baelerlel baclerlal oeilfissue tissue, oelltiesueNOa unique ceiliissue oelitissue' Algal mm, um i 40-100 7 100—200 5-10 \ ' 5-230 ' p 0—5 Effluent suspended aolids,°rng/L 00-140 150-300 10-30 40-60 ‘80- 160 00-250 bm-MWW.MW.WWW..WBW5W“WW¢MW °Dependsonmmm , , “Twmmmwwmwmmm.mmumwwfimw. ' 'Includeeelgae,WMWWM.VM30WOIImmmmdem.wflhhemoimem pomlsmninrluemWeoflemmlL ( - . Note: acrexO.W'=he flxo.3048= m h/ecre-d x1.1209=W-d TABLE 10-4 Operational characteristics of activated-sludge processes \ Remarks Process BOD removal modification Flow model Aeration system efficiency, 96 Conventional Plug-flow Diffused-air, mechanical 85—95 aerators Complete-mix Continuous-flow Diffused-air, mechanical 85—95 stirred-tank reactor aerators Step-feed Plug—flow Diffused—air 85—95 Modified aeration Plug-flow Diffused-air 60—75 Contact stabilization Plug-flow Diffused-air, mechanical 80—90 aerators Extended aeration Plug-flow Diffused-air, mechanical 75—95 aerators High-rate aeration Continuous-flow Mechanical aerators 75—90 stirred-tank reactor Kraus process Plug-flow Diffused-air 85—95 Use for low-strength domestic wastes. Process is susceptible to shock loads. Use for general application. Process is resistant to shoc loads, but is susceptible to filamentous growths. Use for general application for a wide range of wastes Use for intermediate degree of treatment where cell tissue in the effluent is not objectionable. Use for expansion of existing systems and package plan Use for small communities, package plants, and where nitrified element is required. Process is flexible. Use for general applications with turbine aerators to transfer oxygen and control floc size. Use for low-nitrogen. high-strength , *- tr . =5..‘2a.\ TABLE 10-5 Design parameters for activated-sludge processes F /M, Volumetrlc lb BOD5 loading, applied] lb BOD5/ Process modification 4;, d lb MLVSS - d 103113 - d MLSS, mglL V/Q, h 0, IQ . Conventional plug flow 5— 1 5 0.2-0.4 20—40 1,200—3,000 4—8 0.25—0.75 Complete-mix 5—15 0.2—0.6 50—120 2,500—6,500 3—5 0.25—1.0 Step-feed 5—15 0.2—0.4 40—60 1,500—3,500 3—5 0.25—0.75 Modified aeration 0.2—0.5 1.5—5.0 75—150 ZOO—1,000 1.5—3 0.05—0.25 Contact stabilization 5—15 0.2—0.6 60—75 (LOGO—3,000)a (0.5—1.0)3 0.5—1.50 (4,000—9,000)b (3—6)” Extended aeration 20—30 0.05—0.15 10—25 1,500—5,000 18—36 0.5—1.50 High-rate aeration 5—10 0.4—1.5 100—1,000 3,000—6,000 2—4 1.0—5.0 Kraus process 5—15 0.3—0.8 40—100 2,000—3,000 4—8 0.5—1.0 High-purity oxygen 3—1 0 0.25—1.0 100—200 3,000—8,000 1—3 O.25—0.5 Oxidation ditch 10—30 0.05—0.30 5—30 1,500—5,000 8—36 0.75—1.50 Sequencing batch reactor N/A 0.05—0.30 5—15 1,500—5,000d 12—50 N/A Deep shaft reactor NI 0.5—5.0 NI NI 0.5—5 NI Single-stage nitrification 8—20 0.10—0.25 5—20 1,500—3,500 6—15 0.50—1.50 (o.02—o.15)° Separate stage nitrification 15—100 0.05—0.20 3—9 1500—3500 3—6 0.50—2.00 (O.04-—0.15)c ' Contact unit. “Solids stabilization unit. cTKN/MLVSS. dMLSS varies depending on the portion of the operating cycle. Note: lb/103 ft3 -d x 0.0160 = kg/ma -d lb/lb-d = kg/kg~d N/A = not applicable N! = no information new 101: ‘- nqcnslag ‘ Rock Plastic Plastic, Rock, > . 1 __ , ‘ ' redwood v plastic gum? 0.02—0.06 0.06-0.16 0.15—0.04 0.2—1.20 . 0.8—3.2 0.164.064 -d 1—4 ‘ . - 4-10 10—40 ' 15-90 50-2006 10—40c b/1oaft3-d 5—‘25 ‘ 15—30 7 30—00. - 30—100 ' 100—500 00—120 Depth, 1: 0 0—8 6—8 3—6 10—40 15540 $0 Wrath ‘ 30 0—1 1—2 - 1—2 ‘ 1—4 - Sonia ,Few '- Fewor. " " Fewer ' magma: efficiency, % ‘ . 00—90 50—70 05—05: 65—00 40—65 85~95 em Wen- ‘ Partially um» um ‘ No ‘ w» 'Wmmmm.aegu62._ _. “SeeTahmmsiorphysicaloharaotemogvarbuamm. .‘ Ame:ltx0.3048=m ‘ ’ ' W‘-ni1x50.6740=nfikn§~d' W-dx0.9354=m’lm1-d - Mo‘nsldxo.o100=kg/m3-d TABLE 10-17 Typical design information for rotating biological contractors Mum level - Combined Separate Item Secondary nitrification nitrification Hydraulic loading, gal/ll2 - d 2.0—4.0 o.75-2.o 1.0—2.5 Organic loading lb 330051103 n2 - d" b o.75—2.o 0.5—1.5 0.1—0.3 lb TBOD5/103 n2 - w c 2.0—3.5 1.5—3.0 0.2—0.6 Maximum loading on first stage lb seeps/103 "2 - d‘ b 4—6 4—6 ibTBOD5/103 itz-d‘i" 8-12 8—12 ‘ NHg loading, lb/la3 n2 - d o.15—o.3 0.2-0.4 Hydraulic retention time, o, h 0.7—1.5 1.5—4 1.2—2.9 Ellluem BODs. mg/l. 15—30 7—15 ' 7-15 Effluent NH3. rng/L. . <2 1-2 ' Water temperature above 55“F (13°C). b 3800 = Soluble BOD. ' ' °TBOD = Total BOD. ' Note: gallnz-dxo.0407=m3/mZ-d MO’fiz-dXODO-wskg/mz-d TABLE 10-1 2 Typical desln Information for secondary clarlflers“ Type of treatment Settling following air activated-sludge (excluding extended aeration) Settling following oxygen activated-sludge Settling following extended aeration Settling following trickling filtration Settling following rotating biological contractors: Secondary effluent Nitrified effluent ‘ Adapted in part from Ref. 60. Note: gal/ft? - d x 0.0407 = m3/m2 -d Ib/ft2 - h x 4.8824 = kg/m2 - h ft x 0.3048 = m Overflow rate, gel/ft2 - it Average Peak 400—800 1,000—1,200 400-800 1.000—1,200 200—400 600—800 400—600 1.000-1.200 400—800 1,000—1,200 400—600 BOO-1.000 Sollde loading, Iblft2 - h Average Peak 0.8-1.2 2.0 1.0—1.4 2.0 0.2—1.0 1.4 0.6—1.0 1.6 0.8—1.2 2.0 0.6-1.0 1.6 Depth, r ft 12-20 12-20 12-20 10—15 10—15 10—15 ...
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This note was uploaded on 05/20/2010 for the course EVEG 3110 taught by Professor Malone during the Spring '10 term at LSU.

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Metcalf_and_Eddy__Design_tables - .WASIEWME Treatme,m';.;...

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