Accepted Papers - 3.pdf - UNESCO

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1. Sludge Pond water Management During the process of clarifloculation & separation and filtration at the Clarifloculators & Gravity filters at the Pre treatment plant of CPP sludge and Backwash waters are generated. During June-Sept around 300 M 3 /day waste water is generated. During the lean period this comes to 100 M 3 /day. This water along with the fine silts and sludge are transported to the Sludge Pond located at the side of the Raw water reservoir. In the sludge pond, sludge, grit consisting of sand, gravel, or heavy solids are allowed to settle and around 270 - 90 M 3 /day of water is recycled to the raw water reservoir, depending upon the prevailing season. 412 SLUDGES WITH WATER FROM CLARIFLOCULATOR SERVICE ATER FOR SCOURING SLUDGE PITS 1. Coal dust extraction water recycling System : During the process of grinding of the Coal at the Coal Crusher ( capacity 750 T/hr ) in the Coal Handling plant lot of fine dusts are generated. These dusts are sucked through two no of dust extractor SLUDGE PUMPS SLUDGE POND fans ( Capacity 4700 SETTLING M POND 3 /hr)In the Cyclone separator 13 M3 /hr of water is sprayed on to it and a slurry is made. The slurry are then taken to the settling tank and passed through zigzag path, thus allowing SLUDGE POND OVERFLOW PIT settling the coal dust. Clean water is then allowed to pass through open channels and are guided to the ash slurry sump no-1. RAW WATER RESOIRVOIR 11.2 – 3.75 cub M/hr BACK WAS FRO GRAVITY
SERVICE WATER FOR SPAYING COAL CRUSHER ROOM DUST SUCKED BY TWO NO OF BLOWERS MIXING TANK SETTLING TANK OVERLOW OF SETTLING TANK Other Measures taken in Water Conservations Various measureare already taken and some are in the pipeline for effective conservation of Water. NALCO, CPP is continually putting its effort to bring down the resource consumption by adopting new technology and retrofitting new system in place of old one. Some of them are 1. In order to further reduce the water requirement in ash transportation NALCO, CPP is shifting towards dry evacuation of ash from the present wet type and already installed have taken the dry system in their Unit no-7 & 8. For Unit 1 to 6 dry disposals road map prepared and will be completed by 2011. Efforts are being taken to use the ash as cash, by selling it to cement plants and other end users. 2. In the future project of Unit-9 & 10, NALCO, CPP is going for high concentration slurry disposal system (HCSD) to the ash pond where the water requirement will be substantially reduced. ASH SLURRY SUMP OF ASH SLURRY PH-1 13 cub M/hr � � � 413 3. MAGALDI bottom ash disposal will be done for the forthcoming units no-9 & 10. 4. In the present system for transportation of ash slurry from ESP, hydro sluicing system is provided. Jet cone measurement and quick action for replacing the defecting jets are done so as to optimize the water requirement in that area. Conclusion : Well designed measures, therefore have saved CPP, NALCO to conserve water to the tune of 3100 M 3 /hr thus reducing the intake water flow from 7000 to 3900 M 3 /hr. Apart from conserving this natural resources it also helps us directly to save energy which otherwise is required to pump from river Brahmani. The bountiful gift of nature in this part of the world notwithstanding, NALCONIANS understand life without water & therefore take all possible recourses to optimize the use of this precious gift of nature- Water.
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National Seminar on Rainwater Harve
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once subsoil water starts draining
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The plantation process starts with
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DOLASANE , SANGAMNER RANGE I, SANGA
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Table 1. Present land use of waters
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the determination of specification
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Hydrological Parameters (mm) 140 12
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Drainage Engineering, 129(3): 184-1
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March to July, 2004 in the field si
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mm in 4 lph drip followed by 755.25
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Table 3 : Seasonal water use (mm) i
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pinnata) Aquatic plants are represe
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the base of the trench to assist dr
Page 31 and 32: SUDS (Sustainable Drainage Systems)
Page 33 and 34: Figure 3 : Cascade model of constru
Page 35 and 36: National Seminar on Rainwater Harve
Page 37 and 38: H eff = H R - H aq - H f ……..
Page 39 and 40: • Layers of gravel/media laid hor
Page 43 and 44: 1.3 % annually, and the total energ
Page 45 and 46: Figure 1a. Schematic diagram of sol
Page 47 and 48: Figure 5. Cross-section of partitio
Page 51 and 52: Fig. 1 (a) - (d) : Water Level Soun
Page 53 and 54: farms and industries hope to get ad
Page 57 and 58: Geology of Area The area is a part
Page 59 and 60: ground water recharge, which includ
Page 61 and 62: Table - 3 : Salient features of the
Page 69 and 70: eing 6.08, pH value of AB 3 and AB
Page 71 and 72: Table 2 : Tolerance limit for metal
Page 73 and 74: CASE STUDY The Salem Municipality i
Page 75 and 76: After analyzing the characteristic
Page 77 and 78: 1. Ash Pond water recycling System
Page 79 and 80: Poly Electrolyte Dosing RAIN WATER
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Page 85 and 86: In coastal areas of Gujarat, the vi
Page 87 and 88: Water diversion Channel The work fo
Page 89 and 90: 04. Natural Water harvesting at Sol
Page 91 and 92: Work Done Storage No. of Area No. o
Page 93 and 94: Conclusions The process of rainwate
Page 95 and 96: Infact, these are ‘lessons’ tha
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Page 103 and 104: One relatively easy means of storin
Page 105 and 106: Ground Water Conservation Technique
Page 107 and 108: anging from 37-60% of recommended d
Page 109 and 110: given priority before implementatio
Page 111 and 112: was having potential to irrigate 15
Page 113 and 114: water, use of improved seed and bal
Page 115 and 116: the result of the success they have
Page 119 and 120: un off from one hill and conveying
Page 121 and 122: harvest will certainly solve the wa
Page 123 and 124: If the rain precipitation in a vill
Page 125 and 126: echarging , A study of world wide f
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The opinion of the public for the q
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in fact the base of energy in Tajik
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end of 80’s building of Roghun’
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consumption of oil on 11 times more
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change waterness charge o Vakhsh m
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are following: a) Compound of const
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for subsequent use of water for irr
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years. These beels can also be conv
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ody through water conservation and
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contribute to increased fish produc
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Figure 1 : Map of Bangladesh showin
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end uses and the intentional manage
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INTRODUCTION Indian water sector is
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ut definitely they are not substitu
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having the height greater than 50m
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ain. There is no conducive evidence
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chase food self sufficiency as a go
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REPORTB OF WORLD COMMISION ON DAMS
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Accepted Papers - 3.pdf - UNESCO

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