DM WATER COST ESTIMATION

DM WATER COST ESTIMATION
Based on the January -2001 data:
A. FILTER WATER COST ESTIMATION
	Total Water processed =		581975	m3 / month
I. Chemicals consumption in PTP
	Name of the Chemical	quantity Kg for the month	cost of the chemicals spent in Rs
	Alum	31700	117783.7
	Chlorine	3600	25000.3
	Polyelectrolyte	12	2227.7
	Total Chemical cost per m3 of water =		0.2492	Rs / m3
II.Power consumption in PTP
	Service		Power consumption in KWhr
	Clarifloculator	1.5 kw*3*24*31	3348
	Alum Dosing pump	1.56*24*31	1160.64
	Alum Dosing stirrer	2.24*24*31	1666.56
	Stilling chamber	3.5*24*31	2604
	Air Blower in Sand filter	18*0.25*32	144
	Raw water Pump	45*24*31	33480
Total power consumption per m3 of water =			0.073	kwhr / m3
Taking the cost of the power as 1Rs/Kwhr
	Total Power cost per m3 of water =		0.073	Rs / m3
III.Water used in Backwashing in PTP
For one regeneration 400 m3 of water is used & there were
32 regenerations during the month of January
Hence water lost per m3 of filter water		=	0.022	m3 / m3 of
Cost of Raw water = 1 Rs/ m3				filter water
Therefore				.
	COST OF 1 m3 OF FILTER WATER = (1+ 0.2492+0.073)/(1-0.022)
		=	1.352	Rs / m3
	DM WATER COST ESTIMATION         Based on the January-2001 data:                     Total Water processed = 109514 m3 / month     FAC       Power consumption of Filter water pump =     49104 kwhr / month     Hence             Cost of water at FAC I/L = 1.80 Rs / m3       For one Backwashing 30 m3 of water is used & there were              10 regenerations during the month of January             Hence Filter water lost per m3 of DM water = 0.003 m3 / m3 of DM             water     Therefore             Cost of water at FAC O/L = 1.805 Rs / m3                                                 Power consumption in Degasser                             Service   Power consumption in KWhr         Blower 3 kw*2*24*31 4464         Pump 30kw*3*24*31 66960                     Total power consumption per m3 of water = 0.652 Kwhr / m3     Taking the cost of the power as 1Rs/Kwhr             Total Power cost per m3 of water = 0.652 Rs / m3                                               Chemicals required in DM chain based on ionic load:       Total cation load                             Ca   +    Mg                 =  98 ppm as CaCO3         Na                              = 50 ppm as CaCO3         K                                =   4 ppm as CaCO3                       Total cation load       =          152 ppm as CaCO3                                           = 152/50 milliequivalents of CaCO3/Litre              1 milliequivalent of CaCO3 will react with 1 milliequivalent of 100%HCL                                          No of milliequivalents of 100%HCL required  =      152/50   meq of HCL /Ltr                      = 3.04*36.5*0.001 Kg of HCL/m3                  = 0.11096 Kg of HCL/m3                             100%HCL density   =   850 Kg/m3                             30%HCL  density    =    955 Kg/m3                       Kg of  30%HCL required/m3 of water      =      0.11096/0.3                        = 0.3699                                                                 Total Anion load :             Chloride                      =  32.4 ppm as CaCO3         Sulfate                        =  27.1 ppm as CaCO3         Bicarbonate                 =  90 ppm as CaCO3         SiO2                           =  10 ppm as CaCO3                       Total Anion load        =  159.5 ppm as CaCO3                      100%NaOH density   = 2041.67 Kg/m3             48%NaOH density    =  1500 Kg/m3                       Kg of 100%NaOH required/m3     =      159.5*40*.001/50                             of water                                               = 0.1276           Kg of 48% NaOH required/m3   =   0.1276/0.48                             of water                                                =     0.2658                         Total chemical cost    =  2.83 Rs /m3                       Taking 10% water as backwash and rinse water             Cost of backwash and rinse water =    0.1805 Rs / m3                     Resin Depreciation cost =  0.35 Rs /m3                       Total DM water cost =                5.8  Rs /m3 of DM water                                                 DM water cost based on actual chemical consumption :                     30% HCL Consumption =  77.72 MT /Month                       48%NaOH consumption= 35.2 MT /Month                       Actual chemical cost    =  4.205 Rs / m3                       Total DM water cost   = 7.2 Rs / m3 of DM water                                                 If ionic load increases by  4 times                                     Chemical consumption in PTP =   0.997 Rs /m3                     Filter water cost  =  2.116 Rs / m3                       Cost of water at FAC O/L 2.571 Rs / m3                       Total chemical cost = 11.31 Rs / m3                                     Total DM water cost   = 16.3 Rs / m3                                                 Process Condensate Treatment Cost                           Based on March month data                           Total water processed in March     =             109921 m3/month                       30% HCL Consumption =  26.595 MT /Month                       48%NaOH consumption= 18.39 MT /Month                     Total Chemical cost/m3 of PC water   1.81 Rs / m3 of PC water