This document presents the process flow and costing for the effluent treatment plant (ETP) at ViyeLLatex. The ETP uses an 8-step process including equalization, reaction, pH control, flocculation, clarification, oxidation, filtration and discharge. Chemicals including lime, ferrous sulfate and polyelectrolyte are used. The construction cost is estimated at 3-3.5 crore taka including equipment, civil works and land. Operating costs are approximately 22,942 taka per day including chemicals, electricity and wages. The cost to treat one liter of effluent is 0.08 taka and the monthly operating cost is estimated at 6.88 lakh taka.

1. Presented by : Adity Chawdhury (2012000400012)
Fahim Abedin (2012000400019)
Md. Nazmul hossain Khan (2012000400022)
Sifat Mahmud (2012000400035)
Ashfaque Al Areefe (2012000400037)
TITLE: EFFLUENT TREATMENT
COSTING(VIYELLATEX ETP)

2. Process flow chart:
1. Influent
2.Equalization tank
3.Reaction tank
4.PH control tank
5.Flocculation
6.Primary clarifier
7.Oxidation tank
8.Secondary clarifier
9.Multi filtration tank
10.Discharged Effluent

3. DEFINATION &FUNCTION:
 1.Influent: Raw waste water which passed to ETP for perfect treatment.
 2.Equalization tank: Flow equalization is method used to overcome the
operational problems and flow rate variations to improve the
performance of downstream processes and to reduce the size & cost of
downstream treatment facilities. To prevent flow rate, temperature, and
contaminant concentrations from varying widely, flow equalization is
often used.
 Function:
 For Cooling
 For making Homogeneous.

4. 3.Reaction tank: To remove color,COD,BOD & TDS (partial) in
presence of bacteria.
4.PH Control tank:
Function: To maintain PH = 7
Alkali- 98% H2SO4 / HCL
Acidic- 98% NaoH
5.Flocculation: To enlarge the particle size of solid substance by
polyaluminium choloride.

5. Reaction tank

6. 6.Primary clarifier: The primary clarifier is a settling basin used
for the primary settling / clarification of waste water for the
waste water treatment process and where the clear
supernatant waste water flows out from top with settled
suspended solids being discharged from bottom.
PRIMARY PURPOSE:
Remove solids that pass through headworks and grit
equipment.
Lessen organic loading on following biological process
Buffer flow and load stabilization to secondary process / split
stream treatments.

7. Primary clarifier

8. 7.Oxidation tank: To remove color,COD,BOD & TDS (partial) in
presence of bacteria.
8.Secondary clarifier: Secondary clarifiers help to separate the
solids from the liquid phase of the mixed liquor, and remove
settled solids from the floor. The three secondary clarifiers at
the Glens Falls plant are of the circular, center-column, siphon
feed type. Each of these clarifiers are 90 feet in diameter with a
water depth of 12 feet. The clarifiers have a detention time of
4.5 hours and an overflow rate of 479 gallons per day per
square foot.
PRIMARY PURPOSE:
Separate and remove solids/biomass produced in biological
process in manner that suits process goals (rapid sludge
removal, detention time, etc.).
Thicken solids for recirculation and process reuse.
Store biomass as buffer to prevent process upsets.

9. Oxidation tank

10. Secondary clarifier

11. 10.Effluent: Treated waste water that comes out through
the outlet of ETP
9.Multi filtration tank: final purification stage of effluent

12. Process which requires chemicals and cost:
no Processes Chemicals Required
amount
per day
Cost per kg Cost per day
1. Reaction tank Lime powder 600kg 10tk 6000tk
2. PH control FeSO4 1000kg 16tk 16000tk
3. Flocculation Polyelectrolyte 1kg 250tk 250tk
4. DO control Urea
+Phosphoric acid
1kg+1kg 22tk+170tk 192tk
Total chemical cost required per day 22442tk

13. Others Factors which requires cost:
no Construction cost Total taka
1. Space required 4000-5000sqft
2. Equipment cost 160-170lac
3. Civil cost 140-150lac
Total construction cost 3-3.5crore
no Other related costs Per day Total cost
1. Electric bill 500tk 15000tk
2. Chemical cost 22442tk 673260tk
3. Wages and salary 70000tk

14. Cost required per day:
 Effluent treated per day: 300000liters
 Chemicals cost per day: 22442tk
 Power cost per day: 500tk
 total cost per day: (22442+500)=22942tk
 Cost required treat every liter:(22942tk/300000ltrs)=0.08tk
 Cost per hour:(22942tk/24)=956tk
 Cost per month: (22942tk*30)=688260tk