This document provides an overview of the effluent treatment process at Delta Knit Composite Ltd. It describes the various stages of ETP including screening, equalization, pH correction, aeration, sedimentation, sludge thickening, and effluent discharge. The key stages involve using bacteria to biologically treat 120 m3/hr of wastewater over 8 hours in an aeration tank, sedimentation to separate solids from treated water, and sludge thickening before partial recycled is returned to the aeration tank and the remainder is discharged. The multi-stage biological and physical separation process aims to treat industrial wastewater before discharge.

1. PRESENTATION ON
Effluent Treatment process

2. PREPARED BY
Name ID
Jotish Chandra Roy 12132107059
8th Intake

3. WHAT IS ETP?
INFLUENT
ETP
TREATMENT
EFFLUENT
SLUDGE
ETP OR EFFLUENT TREATMENT PLANT IS USED TO TREAT THE
INDUSTRIAL WASTE WATER.
INFLUENT: UNTREATED INDUSTRIAL WASTE WATER.
EFFLUENT: TREATED INDUSTRIAL WASTE WATER.
SLUDGE: SOLID PART SEPARATED FROM WASTE WATER BY ETP.

4. ABOUT THE ETP OF DELTA KNIT COMPOSITE LTD.
 BIOLOGICAL ETP: TREATMENT OF
WASTE WATER BY BACTERIA.
TREATMENT CAPACITY: 120 m3/hr
STORAGE CAPACITY: 6000 m3

6. FLOW CHART OF ETP OF DELTA KNIT COMPOSIT LTD.
INFLUENT
SCREENING
EQUALIZATION
PH CORRECTION
DISPERSE UNIT
RECYCLE
TANK
SEDIMENTATION PACK
SEDIMENTATION TANK
SLUDGE THICKENING UNIT
AERATION
SLUDGE
SLUDGE DISCHARGE
FISH POND
EFFLUENT
EFFLUENT DISCHARGE

7. SCREENING
DRUM SCREENER
 SCREENING IS THE
FILTRATION PROCESS FOR
THE SEPARATION OF COARSE
PARTICLES FROM INFLUENT.
 STAINLESS STEEL NET IS
USED FOR SCREENING.
 HARD PLASTIC BRUSHES
ARE USED TO CLEAN THE NET,
WHICH ARE DRIVEN
MECHANICALLY.
(DRUM SCREENER IS USED IN THIS ETP)

8. SCHEMTIC DIAGRAM OF DRUM SCREENER

9. EQUALIZATION
EQUALIZATION IS THE PROCESS
TO MAKE THE WASTE WATER-
-HOMOGENOUS &
-COOL
EQUALIZATION TANK IS ALSO
CALLED HOMOGENOUS TANK.
RETENTION TIME 8 HOURSE
THIS TANKA IS MADE OF RCC.

10. SCHEMTIC DIAGRAM OF EQUALIZATION TANK
EQUALIZATION TANK
INFLUENT FROM
SCREENING
SPRAY OF WATER
COMING FROM
DYEING UNIT
AIR FOR DIFFUSION
COOL
&
HOMOGENOUS
INFLUENT TO
PH CORRECTION
TANK

11. PH CORRECTION
 IN THIS TANK PH OF THE INFLUENT
IS CORRECTED TO MEET THE
STANDARD.
 ACID OR ALKALI IS ADDED TO THE
EFFLUENT BY DOZZING TO INCREASE
OR DECREASE THE PH OF INFLUENT
RESPECTIVELY.
 MULTI-METER TYPE PH METER IS
USED.

12. SCHEMTIC DIAGRAM OF PH CORRECTION
PH CORRECTION
ACID OR ALKALI
INFLUENT FROM
EQUALIZATION
TANK
INFLUENT OF
DESIRED PH TO
DISPERSE UNIT

13. DISPERSE UNIT
 FUNCTION OF DISPERSE
TANK IS TO MIX THE
SLUDGE COMING FROM
RECYCLE TANK WITH
WASTE WATER.
 IT HELPS TO PROPER
AERATION.

14. SCHEMTIC DIAGRAM OF DISPERSE UNIT
DISPERSE UNIT
( MIXING OF SLUDGE & WASTE)
SLUDGE FROM
RECYCLE TANK
INFLUENT FROM
PH CORRECTION
TANK
MIXED INFLUENT
& SLUDGE TO
AERATION

15. AERATION
 FUNCTION OF AERATION IS
OXIDATION BY BLOWING
AIR.
 AEROBIC BACTERIA IS
USED TO STABILIZE AND
REMOVE ORGANIC
MATERIAL PRESENTS IN
WASTE.
 ABOUT 200 KG AEROBIC
BACTERIA IS GIVEN TO THE
PLAN FOR 5 YEARS.

16. SCHEMTIC DIAGRAM OF AERATION
AERATION TANK
MIXTURE
OF WASTE
WATER &
SLUDGE
AEROBIC BACTERIA
AIR
DISCHARGE TO
SEDIMENTATION
TANK
ORGANIC MATTER + O2
BACTERIA
NUTRIENT
CO2+ HO2 + HEAT
REACTION IN AERATION TANK:
O2

17. Sedimentation pack
IN THIS TANK SLUDGE IS
SETTLED DOWN
PARTIALLY
SEDIMENTATION PACK
PROVIDES THE
ADVANTAGE OF FAST
SLUDGE SEPARATION

18. Sedimentation tank
 IN THIS TANK SLUDGE IS
SETTLED DOWN FINALLY.
 EFFLUENT IS
DISCHARGED FROM PLANT
THROUGH A FISH POND.
 SLUDGE IS PASSED TO
THE THICKENING UNIT.

19. SCHEMTIC DIAGRAM OF Sedimentation tank
SEDIMENTATION
TANK
WASTE WATER
FROM
SEDIMENTATION
PACK
SLUDGE TO
THICKENING UNIT
EFFLUENT
EFFLUENT
DISCHARGE
FISH POND
FISH POND INDICATES THE HIGHER DEGREE OF TREATMENT IN THIS ETP

20. EFFLUENT DISCHARGE

21. SLUDGE THICKENING UNIT
IN THIS UNIT SLUDGE IS
DRIED AND DISCHARGED.
A PARTIAL AMOUNT OF
SLUDGE IS RETURNED BACK TO
THE AERATION TANK FROM
THICKENING UNIT THROUGH
RECYCLE TANK CALLED
RETURN SLUDGE TANK AND
DISPERSE TANK.

22. SCHEMTIC DIAGRAM OF SLUDGE
THICKENING UNIT
SLUDGFE
THICKENING UNIT
SLUDGE FROM
SEDIMENTATION
UNIT
SLUDGE
DISCHARGE
SLUDGE TO
RECYCLE TANK

23. DRIED SLUDGE

24. RETURN SLUDGE TANK
FUNCTION OF RETURN TANK OR
RECYCLE TANK IS TO MIX
WATER WITH SLUDGE
THIS MIXTURE IS THEN PASSED
TO AERATION TANK THROUGH
DISPERSE TANK.

25. ADVANTAGE OF RECYCLE SLUDGE TO AERATION TANK
 SLUDGE AGAIN OXIDIZED TO MINIMIZE THE POLLUTION
FROM SLUDGE.
 ALIVE BACTERIA OF SLUDGE IS AGAIN USED IN AERATION TO
UTILIZE THIS BACTERIA.
SLUDGE RECYCLE
TANK
SLUDGE FROM
THICKENING UNIT
MIXING OF
SLUDGE & WATER
SLUDGE TO AERATION
TANK THROUGH
DISPERSE UNIT

26. Thanks all of you for being with me