HYDRAULIC DESIGN OF 10.5 MLD ( 20 HOURS) W.T.P AT JAMAKHANDI

SUMMARY OF COMPONENTS

THE TREATMENT PLANT CONSISTS OF THE FOLLOWING UNITS:

(1) AERATOR - 1 NO.(2) RAW WATER CHANNEL - 1 NO.(3) FLASH MIXER- 1 NO.(4) CLARIFLOOCULATOR- 1NO.(5)FILTER HOUSE COMPLEX WITHA) FILTERS - 5 NOS ( EACH TWO COMPARTMENT )(B) CHEMICAL HOUSE - 64 SQ.MTS(C ) OFFICE - 24 SQ.M(D) LABORATORY - 24 SQ,MTS(E) CHLORINATION ROOM - 20 SQ.M(F) CHEMICAL TANKS - 2 NOS 1000 LITRES EACH(6) PURE WATER SUMP - 10 LAKH LITRES(7) WASH WATER TANK - 2.5 LAKH LITRES

PLANT PARAMETERS

CAPACITY OF WTP = 10.5 MLDOPERATING HOURS = 20CAPACITY OF WTP FOR 24 HOURS 12.6 MLD DISCHARGE

PER HOUR 525 Cu.MPER MINUTE 8.75 Cu.MPER SECOND 0.146 Cu.M

1. AERATOR TYPE OF AERATOR CASCADEAREA 0.015 TO 0.045 Sq.M/Cu.MAREA REQUIRED 15.75 Sq.MDIAMETER OF INLET CHANNEL 1050 MMHEIGHT OF AERATOR 1250 MMNUMBER OF STEPS 3 NOSRISE OF EACH STEP 300 MMDIAMETER OF BOTTOM MOST STEP 4599 MM SQRT (( AREA x 4 / PAI ) + ( INLET DIA.) ^2)RADIUS OF BOTTOM MOST CHANNEL 2300 MMWIDTH OF COLLECTION CHANNEL 1000 MM

2. RAW WATER CHANNEL

WIDTH OF CHANNEL 750 MMDEPTH OF CHANNEL 750 MMVELOCITY 0.8 TO 1 MPSAREA PROVIDED 0.56 Sq.MAREA REQUIRED 0.18 Sq.MDEPTH OF FLOW 243 MM AREA REQUIRED / WIDTH OF CHANNELCOLUMN SUPPORTS - 5000 MM C/C

3. FLASH MIXER

DETENTION TIME 10 TO 40 SECSTYPE - CIRCULAR OR SQUARE SHAFT SPEED GREATER THAN 100 RPMVELOCITY GRADIENT 300 PER SECIMPELLER DIA / TANK DIA. 0.2 TO 0.4VERTICAL BAFFLES 0.1 TO 0.084 DIAPOWER REQUIREMENT 1 TO 3 WATT/Cu.M/HOUR

DETENTION PERIOD = 30 SECSVOLUME REQUIRED = 4.375 Cu.M DTENTION TIME x DISCHARGEHEIGHT OF LIQUID = 2500 MM ASSUMEDAREA REQUIRED = 1.75 Sq.M VOLUME / HEIGHTDIA. OF MIXER REQUIRED = 1493 MM FROM AREADIA.. PROVIDED = 1500 MMVOLUME PROVIDED = 1.77 Cu.MLIQUID HEIGHT / TANK DIA. = 1.67FREE BOARD= 300 MMHEIGHT OF TANK = 2800SIZE OF TANK PROVIDED = 1500 MM DIA. 2800 MM HEIGHT

PROJECTION OF VERTICAL BAFFLES = 150 TO 126 MMPROVIDED 150 MM X 75 MM VERTICAL BAFFLES OF FOUR QUANDRANTSIMPELLER DIAMETER = 300 TO 600 MM

POWER REQUIREMENTS

POWER REQUIREMENT CONSIDERED = 2 WATT/Cu.M/HOUR POWER ASSUMED IN RANGEEFFICIENCY FACTOR 0.6MOTOR POWER REQUIRED = 2.35 HPMOTOR PROVIDED = 2.5 HP

PIPE FROM FLASH MIXER TO CLARI-FLOCCULATOR

VELOCITY RANGE = 0.3 TO 0.6 MPSVELOCITY ADOPTED FOR DESIGN = 0.45 MPSAREA OF PIPE REQUIRED = 0.32 Sq.M DISCHARGE/VELOCITYDIA. OP PIPE REQUIRED = 642 MM FROM AREAPROVIDE 750 MM NP2 RCC PIPE FROM FLASH MIXER TO CLARI-FLOCCULATOR

4. FLOCCULATOR

SIDE WATER DEPTH = 2500 TO 4000 MMDETENTION TIME = 30 MINUTESPADDLE AREA = 10 TO 25 PERCENT OFTANK AREAPADDLE REVOLUTION = 1 TO 5 REVOLUTION PER MINUTEVELOCITY GRADIENT = 20 TO 75 SECPOWER CONSUMPTION = 0.75 TO 2 KWH / MLD

TOTAL VOLUME OF FLOCCULATOR = 262.5 Cu.M DETENTION TIME X DISCHARGESIDE WATER DEPTH = 3.25 M ASSUMED PARAMETERAREA OF FLOCCULATOR REQUIRED = 80.77 Sq.M VOLUME/DEPTHDIA. OF INLET CHAMFER = 750 MM FROM AREATHICKNESS OF INLET CHAMFER = 150 MMTOTAL DIA. OF INLET CHAMBER = 1050 MMAREA OF INLET CHAMBER = 0.87 Sq.MTOTAL AREA REQUIRED = 81.64 Sq.MDIA. OF FLOCCULATOR REQUIRED = 10224 MMDIA. OF FLOCCULATOR PROVIDED = 10500 MM

POWER REQUIREMENTS

C/S AREA OF FLOCCULATOR = 30.71 Sq.MGRADIENT VALUE = G = 40MU = 0.0009POWER REQUIRED = MU x G^2 x VOL.= 378 WATTSPOWER SPENT/UNIT VOLUME = 1.44 WATTS RANGE : 0.75 TO 2 WATTS/Cu.M/HrMOTOR EFFICIENCY FACTOR = 0.75POWER OF MOTOR REQUIRED = 0.68 HPPROVIDE 1.0 HP MOTOR FOR PADDLE DRIVING

PADDLE REQUIREMENTS

VELOCITY AT TIP OF BLADE = 0.4 MPSVELOCITY OF WATER AT BLADE TIP= 0.1 MPS 0.25 x VELOCITY OF BLADE TIPCd = 1.8GAMMA = 1000RELATIVE VELOCITY OF BLADE = 0.3 MPSAREA OF PADDLES REQUIRED = 15.56 Sq.MPADDLE AREA / FLOCCULATOR AREA = 50.65 PERCENTPADDLE AREA PROVIDED AS % OF C/S AREA OF FLOCCULATOR = 25PADDLE AREA ADOPTED = 7.68 Sq.MPADDLE REVOLUTION = 1 RPMVERTICAL EDGE OF BLADE = 3841 MM

5. CLARIFIER

DETENTION TIME = 2 TO 2.5 HOURSSIDE WATER DEPTH = 2.5 TO 4 MSURFACE LOADING = 30 TO 40 Cu.M/DAY/MWEIR LOADING = 300 Cu.M/DAY/MBOTTOM SLOPE = 1 IN 12SCRAPING SYSTEM= 30 TO 40 MIN / REVOLUTIONSHAPE = CIRCULARVOLUME OF TANK = 1050 Cu.M DISCHARGE X DETENTION TIMEVOLUME OF TANK WITH 10 % OVERLOADING= 1155 Cu.MSIDE WATER DEPTH = 3250 MMSIDE WATER DEPTH ADOPTED = 3400 MMSURFACE AREA REQUIRED = 339.71 Sq.M VOLUME / SIDE WATER DEPTHAREA OF FLOCCULATOR WITH INLET CHAMBER = 81.64 Sq.MAREA OF FLOCCULATOR +CLARIFIER = 421.34 Sq.M

COMBINED DIA. OF FLOCCULATOR+CLARIFIER= 23160 MMDIA. ADOPTED = 24000 MMCOMB. AREA. OF FLOC.+CLARIFIER PROVIDED = 449.856 Sq.MAREA OF CLARIFIER PROVIDED = 368.22 Sq.M

SURFACE LOADING

SURFACE LOADING / HOUR= 1.43 Cu.M /Sq.MSURFACE LOADING / DAY = 34.22 Cu.M/Sq.M < 40 Cu.M / Sq. M

WEIR LOADING

WEIR LENGTH = 75.41 MWEIR LOADING = 167.09 Cu.M / M /DAY < 300 Cu.M / M / DAY

DESIGN OF LAUNDER

VELOCITY OF FLOW = 0.4 M / SEC M/SEC DEPTH OF LAUNDER = 500 MM

WIDTH OF LAUNDER = 750 MMPERIMETER OF LAUNDER = P = 1750 MMAREA OF LAUNDER = A = 375000 Sq.MMHYDRAULIC RADIUS = 214.29 MM = 0.21 MN-VALUE IN MANNINGS FORMULA = 0.013SLOPE REQUIRED = 0.00021 SLOPE 1 IN 4840.658 (NEGLIGEBLE)

OPENING FROM FLOCCULATOR TO CLARIFIER

VELOCITY OF FLOW = 1 CM/SEC 0.01 M/SECPERIMETER OF FLOCCULATOR WALL = 32.99 MCONSIDER 50 % OPENINGSLENGTH OF OPENINGS = 16.50 MAREA OF OPENING REQUIRED = 14.58 Sq.MDEPTH OF OPENING = 884 MMPROVIDE 1000 MM OPENING FOR 50 % OF PERIPHERAL LENGTH

SLUDGE PIPE

SLUDGE VOLUME = 2.5 Cu.M / MLDVOLUME OF SLUDGE = 26.25 Cu.MDESLUDGING PERIOD = 4 HOURSSLUDGE VOLUME / PERIOD = 4.375 Cu.MSLUDING DURATION = 10 MINUTESDISCHARGE = 0.007292 Cu.M / SECVELOCITY OF FLOW = 1.2 MPS AREA OF PIPE REQUIRED = 0.006076DIA, OF SLUDGE PIPE REQUIRED = 88 MMPROVIDED SIZE OF NP2-RCC PIPE FOR DESLUDGING = 300 MM

6. FILTER HOUSE

TYPE : RAPID SAND FILTERSRATE OF FILTRATION = 80 TO 100 LPM / Sq.M / HOUROVER LOAD = 10 PERCENTLENTH / BREADTH = 1.11 TO 1.5BEDS FOR EACH FILTER = 2RATE OF FILTRATION = 4.8 TO 6 Cu.M / Sq.M/HOURDISCHARGE INCLUDING 10 % OVERLOADING = 577.5 Cu.M / HOURRATE OF FILTRATION ADOPTED = 5.4 Cu.M / HOURAREA OF FILTERS REQUIRED = 106.94 Sq.MNO. OF FILTERS - EACH OF TWIN BED = 4AREA OFEACH BED = 13.37 Sq.MRATIO (LENTH / BREADTH) ADOPTED = 1.25BREADTH OF FILTER BED REQUIRED = 3.27LENTH OF FILTER BED REQUIRED = 4.09PROVIDE - 8 BEDS FOR 4 FILTERS OF SIZE = 3300 4000 MM x MM UNDER DRAINAGE SYSTEM

AREA OF PERFORATIONS / AREA OF FILTER = 0.3 %TOTAL AREA OF PERFORATIONS = 39600 Sq.MM AREA OF FILTERS X 0.3TOTAL AREA OF LATERALS = 2.5 X AREA OF PERFORATIONS 99000 Sq.MMAREA OF MANIFOLD = 1.8 X AREA OF LATERLAS = 178200 Sq.MMSIZE OF MANIFOLD PROVIDED = 450 450 202500 Sq.MM

LATERALS

SPACING OF LATERALS = 175 MM NO. OF LATERALS ON BOTH SIDE = 38AREA OF EACH LATERAL = 2625 Sq.MMDIA. OF EACH LATERAL = 58 MM SIZE OF LATERALS ADOPTED = 60 MM (ID)

LENGTH OF LATERAL = 1260 MM (FILTER WIDTH x 0.9 - MANIFOLD) /2

PERFORATIONS

12 MM PERFORATIONS

SIZE OF PERFORATIONS = 12 MMTOTAL AREA OF PERFORATIONS = 39600 Sq.MM AREA OF FILTERS X 0AREA OF PERFORATION/AREA OF LATERALS (12 MM) = 0.5SPACING OF PERFORATIONS = 250 MMNO. PERFORATIONS / LATERAL = 5 SAY TOTAL NO. OF PERFORATIONS = 189AREA OF EACH PERFORATION = 113.112 Sq.MMTOTAL AREA OF PERFORATIONS = 21378.17 Sq.MMPROVIDED (AREA OF PERFORATIONS / AREA OF LATERALS) = 0.22 < 0.5

8 MM PERFORATIOPNS

AREA OF PERFORATIONS ( 8 MM) = AREA OF PERFORATIONS - AREA OF 12 MM PERFORATIONS= 18221.832 Sq.MM

SIZE OF PERFORATIONS = 8 MMSPACING OF PERFORATIONS = 200 MMNO. PERFORATIONS / LATERAL = 6 SAYTOTAL NO. OF PERFORATIONS = 226AREA OF EACH PERFORATION = 50.272 Sq.MMTOTAL AREA OF ORIFICES = 11361.47 Sq.MM

5 MM PERFORATIONS

AREA OF PERFORATIONS (5 MM) = AREA OF PERFORATIONS - AREA OF ( 12 AND 10 ) MM PERFORATIONS= 6860.36 Sq.MM

SIZE OF PERFORATIONS = 5 MMSPACING OF PERFORATIONS = 140 MMNO. PERFORATIONS / LATERAL = 9 SAYTOTAL NO. OF PERFORATIONS = 339AREA OF EACH PERFORATION = 19.6375 Sq.MMTOTAL AREA OF ORIFICES = 6657.113 Sq.MM

TOTAL AREA OF PERFORATIONS (12+8+5)MM = 39396.75 > 39600 Sq.MM

FILTER INLET CHANNEL

OVER LOADING = 10 % 1.1 FACTORDISCHARGE WITH OVERLOADING = 577.5 Cu.M / HOUR

= 0.16 Cu.M / SECONDVELOCITY OF FLOW = 0.3 TO 0.4 MPSAREA REQUIRED = 0.40 Sq.M = 401042 Sq.MMWIDTH OF CHANNEL = 750 MMDEPTH OF CHANNEL = 750 MMAREA PROVIDED = 562500 SQ.MM > 401042DEPTH OF FLOW = 535 MMFREE BOARD AVAILABLE = 215 MM

WASH WATER TROUGH

RATE OF WASHING = 600 LPM/Sq.M/MIN 0.01 Cu.M/SEC/Sq.MDISCHARGE REQUIRED / FILTER = 0.264NO. OF TROUGHS / BED = 2NO. BEDS / FILTER = 2DISCHARGE / TROUGH = 0.066 Cu.M / SECVELOCITY OF FLOW = 2 MPSAREA OF TROUGH REQUIRED = 33000 Sq.MMWIDTH OF TROUGH PROVIDED = 300 MMBREADTH OF TROUGH PROVIDED = 300 MMAREA OF TROUGH PROVIDED = 90000 Sq.MM > 33000

FILTER INLET CONDUIT

DISCHARGE / FILTER INCLUDING OVER LOAD = 0.04 Cu.M / SECVELOCITY OF FLOW = 0.4 MPSAREA OF PIPE REQUIRED = 100260 Sq.MMDIA. OF PIPE REQUIRED = 357 MMDIA. OF PIPE PROVIDED = 350 MM

FILTER OUTLET CONDUIT

DISCHARGE / BED INCLUDING OVER LOAD = 0.04 Cu.M / SECVELOCITY OF FLOW = 1.8 MPSAREA OF PIPE REQUIRED = 22280 Sq.MMDIA. OF PIPE REQUIRED = 168 MM

DIA. OF PIPE PROVIDED = 200 MM

WASH WATER INLET CONDUIT

WASHING RATE = 600 LPM/Sq.M/MIN = 0.01 Cu.M/Sq.M/SECDURATION OF WASH = 10 MINPERIOD OF WASH = 6 HOURSNO. OF FILTERS PER WASH = 1DISCHARGE = 0.264 Cu.M / SECVELOCITY OF FLOW = 3.6 MPSAREA REQUIRED = 0.07 Sq.MDIA. REQUIRED = 306 MMDIA. OF PIPE PROVIDED = 300 MM

WASH WATER OUTLET CONDUIT

WASHING RATE = 600 LPM/Sq.M/MIN = 0.01 Cu.M/Sq.M/SECDURATION OF WASH = 10 MINPERIOD OF WASH = 6 HOURSNO. OF FILTERS PER WASH = 1DISCHARGE = 0.264 Cu.M / SECVELOCITY OF FLOW = 2.4 MPSAREA REQUIRED = 0.11 Sq.MDIA. REQUIRED = 374 MMDIA. OF PIPE PROVIDED = 400 MM

PAC TANKS

DOSAGE OF PAC = 2.2 MG / LITREQUANTITY OF PAC REQUIRED = 23.1 KG/DAYSOLUTION STRENGTH = 5 PERCENTQUANTITY OF SOLUTION = 462 LITRES = 0.462 Cu.MNO. OF TANKS PROVIDED = 2SIZE OF EACH TANK = 1200 1200 1200 MM x MM x MMCAPACITY OF TANKS PROVIDED = 3.46 Cu.M

CHEMICAL STORAGE AREA / CHEMICAL HOUSE

QUANTITY OF PAC REQUIRED = 23.1 KG/DAYSTORAGE PERIOD = 90 DAYSSTORAGE QUANTITY = 2079 KGS.CAPACITY OF EACH BAG = 50 KGS.NO. OF BAGS = 42STORAGE HEIGHT = 1500 MMMOVEMENT AREA REQD. = 50 %AREA REQUIRED AS PER TENDER = 24 Sq.MAREA PROVIDED (MM x MM ) = 4000 6000 24 Sq.M (L x B)

7. WASH WATER TANK

WASHING RATE = 600 LPM/Sq.M/MIN = 0.01DURATION OF WASHING = 10 MINPERIOD OF WASH = 6 HOURSQUANTITY OF WATER REQUIRED = 158.4 Cu.MTANK CAPACITY PROVIDED = 200 Cu.MSTAGING OF TANK = 9000 MMDIA. OF TANK = 7000 MMHEIGHT OF TANK = 5000 MMCAPACITY OF TANK PROVIDED =

8. WASH WATER PUMPS

CAPACITY OF TANK = 200 Cu.MEMPTYING PERIOD OF TANK = 6PUMPING RATE = 0.009 Cu.M/SECPUMPING HEAD INCLUDING HEAD LOSS 15000 MMEFFICIENCY OF PUMP = 0.75CAPACITY OF PUMP REQUIRED = 2.47 HPCAPACITY OF PUMP PROVIDED = 2.5 HP

CONDUIT FROM PURE WATER CHANNEL TO PURE WATER SUMP

DISCHARGE WITH 10 % OVERLOAD = 0.16VELOCITY OF FLOW = 1.8 MPSAREA OF PIPE REQUIRED = 0.09 Sq.MDIA. OF PIPE REQUIRED = 337 MMDIA. OF NP2-RCC PIPE PROVIDED = 400 MM

9. PURE WATER SUMP

CAPACITY OF TANK = 200 Cu.MDEPTH OF TANK = 3000 MMAREA OF TANK REQUIRED = 66.67DIA. OF TANK REQUIRED = 9213 MMDIA. OF TANK PROVIDED = 10000