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DEPARTMENT OF TEXTILE ENGINERING
ETP : Effluent Treatment Plant For Textile
BIOLOGICAL ETP
COURSE TITLE“ENVIRONMENTAL POLLUTION AND ITS
CONTROL”
PRESENTATION ON“ETP OF DELTA KNIT COMPOSITE LTD.”
PREPARED BY
Name ID
Mazadul Hasan Sheshir
2010000400008
PRESENTER
Mazadul Hasan Sheshir
2010000400008
WHAT IS ETP?
INFLUENT ETPTREATMENT
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.
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
FLOW CHART OF ETP OF DELTA KNIT COMPOSIT LTD.INFLUENT
SCREENING
EQUALIZATION
PH CORRECTION
DISPERSE UNIT
RECYCLETANK
SEDIMENTATION PACK
SEDIMENTATION TANK
SLUDGE THICKENING UNIT
AERATION
SLUDGESLUDGE DISCHARGE
FISH POND EFFLUENT
EFFLUENT DISCHARGE
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)
SCHEMTIC DIAGRAM OF DRUM SCREENER
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.
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 CORRECTIONTANK
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.
SCHEMTIC DIAGRAM OF PH CORRECTION
PH CORRECTION
ACID OR ALKALI
INFLUENT FROM EQUALIZATION
TANK
INFLUENT OF DESIRED PH TO DISPERSE UNIT
DISPERSE UNIT
FUNCTION OF DISPERSE TANK IS TO MIX THE SLUDGE COMING FROM RECYCLE TANK WITH WASTE WATER.
IT HELPS TO PROPER AERATION.
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
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.
SCHEMTIC DIAGRAM OF AERATION
AERATION TANK
MIXTURE OF WASTE WATER & SLUDGE
AEROBIC BACTERIA
AIR
DISCHARGE TO SEDIMENTATION
TANK
ORGANIC MATTER + O2
BACTERIA
NUTRIENTCO2+ HO2 + HEAT
REACTION IN AERATION TANK:
O2
SEDIMENTATION PACK
IN THIS TANK SLUDGE IS SETTLED DOWN PARTIALLY
SEDIMENTATION PACK PROVIDES THE ADVANTAGE OF FAST SLUDGE SEPARATION
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.
SCHEMTIC DIAGRAM OF SEDIMENTATION TANK
SEDIMENTATIONTANK
WASTE WATER FROM
SEDIMENTATION PACK
SLUDGE TO THICKENING UNIT
EFFLUENT
EFFLUENTDISCHARGE
FISH POND
FISH POND INDICATES THE HIGHER DEGREE OF TREATMENT IN THIS ETP
EFFLUENT DISCHARGE
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.
SCHEMTIC DIAGRAM OF SLUDGE THICKENING UNIT
SLUDGFE THICKENING UNIT
SLUDGE FROM SEDIMENTATION
UNIT
SLUDGE DISCHARGE
SLUDGE TO RECYCLE TANK
DRIED SLUDGE
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.
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
THANKS TO ALL