WASTE WATER TREATMENT
WASTE WATER TREATMENT
WASTE WATER
PLANT
WASTE WATER TREATMENT
POLLUTED
WATER
WASTE WATER
PLANT
WASTE WATER TREATMENT
ENERGY
POLLUTED
WATER
WASTE WATER
PLANT
WASTE WATER TREATMENT
ENERGY
POLLUTED
WATER
WASTE WATER
PLANT
CHEMICALS
WASTE WATER TREATMENT
ENERGY
POLLUTED
WATER CLEAN
WASTE WATER WATER
PLANT
CHEMICALS
WASTE WATER TREATMENT
ENERGY
POLLUTED
WATER CLEAN
WASTE WATER WATER
PLANT
CHEMICALS SLUDGE
WASTE WATER TREATMENT
ENERGY
POLLUTED
WATER CLEAN
WASTE WATER WATER
PLANT
CHEMICALS SLUDGE
OBJECTIVE
WASTE WATER TREATMENT
ENERGY
POLLUTED
WATER CLEAN
WASTE WATER WATER
PLANT
CHEMICALS SLUDGE
OBJECTIVE
RESPECT OF THE DISCHARGE LIMITS
WASTE WATER TREATMENT
AT THE BEGINNING OF THE NINENTIES THE SITUATION
IS CHANGED:
✓ More stringent law about the environment
✓ More competitiveness
✓ Water cost increase
WASTE WATER TREATMENT
ENERGY
POLLUTED
WATER CLEAN
WASTE WATER WATER
PLANT
CHEMICALS SLUDGE
WASTE WATER TREATMENT
ENERGY
POLLUTED
WATER CLEAN
WASTE WATER WATER
PLANT
CHEMICALS SLUDGE
WASTE WATER TREATMENT
ENERGY
POLLUTED
WATER CLEAN
WASTE WATER WATER
PLANT
CHEMICALS SLUDGE
WASTE WATER TREATMENT
ENERGY
POLLUTED
WATER CLEAN
WASTE WATER WATER
PLANT
CHEMICALS SLUDGE
WASTE WATER TREATMENT
ENERGY
POLLUTED
WATER CLEAN
WASTE WATER WATER
PLANT
WATER
REUSE
CHEMICALS SLUDGE
WASTE WATER TREATMENT
THE NEW OBJECTIVES OF THE WASTE WATER
MANAGEMENT ARE:
✓ Environmental impact minimization
✓ Cost control
✓ Water reuse
WASTE WATER PLANT
Waste
homogenization
water
WASTE WATER PLANT
Waste primary
homogenization
water treatment
WATER
SLUDGE
WASTE WATER PLANT
Waste primary Biological discharge
homogenization
water treatment treatment
WATER
SLUDGE
WASTE WATER PLANT
Waste primary Biological discharge
homogenization
water treatment treatment
sludge
dewatering
sludge to disposal
WATER
SLUDGE
WASTE WATER PLANT
Waste primary Biological discharge
homogenization
water treatment treatment
sludge
dewatering
sludge to disposal
WASTE WATER PLANT
primary
treatment
Primary clarification
Flotation
WASTE WATER PLANT
COAGULANT (LIME/CAUSTIC) FLOCCULANT
COAGULANT
Flotation
AIR
WASTE WATER PLANT
COAGULANT (LIME/CAUSTIC) FLOCCULANT
COAGULANT
Flotation
AIR
Objectives
Insoluble pollutants
removal
WASTE WATER PLANT
COAGULANT (LIME/CAUSTIC) FLOCCULANT
COAGULANT
Flotation
AIR
Objectives Costs
Insoluble pollutants Chemicals
removal
Sludge production
WASTE WATER PLANT
Waste primary Biological discharge
homogenization
water treatment treatment
sludge
dewatering
sludge to disposal
WASTE WATER PLANT
Biological
COAGULANT
treatment
WASTE WATER PLANT
Biological
COAGULANT
treatment
Objectives
Organic compounds
removal
WASTE WATER PLANT
Biological
COAGULANT
treatment
Objectives Costs
Organic compounds Energy
removal Sludge production
Chemicals
WASTE WATER PLANT
Biological
COAGULANT
treatment
Objectives Costs
Organic compounds Energy Inlet water
removal Sludge production quality
Chemicals
WASTE WATER PLANT
Waste primary Biological discharge
homogenization
water treatment treatment
sludge
dewatering
sludge to disposal
WASTE WATER PLANT
Sludge
COAGULANT
dewatering
Belt press
Filter press
Centrifuge
WASTE WATER PLANT
COAGULANT (LIME) FLOCCULANT
COAGULANT
Belt press
WASTE WATER PLANT
COAGULANT (LIME) FLOCCULANT
COAGULANT
Belt press
Objective
Dry material sludge
increase
WASTE WATER PLANT
COAGULANT (LIME) FLOCCULANT
COAGULANT
Belt press
Objective Costs
Dry material sludge Sludge production
increase Chemicals
Energy
WASTE WATER PLANT
COAGULANT (LIME) FLOCCULANT
COAGULANT
Belt press
Objective Costs
Dry material sludge Sludge production Quality and
increase Chemicals quantity
Energy of the inlet sludge
WASTE WATER TREATMENT
SUMMARIZING:
✓ Costs
WASTE WATER TREATMENT
SUMMARIZING:
◼ Chemicals
✓ Costs ◼ Sludge production
◼ Energy
WASTE WATER TREATMENT
SUMMARIZING:
◼ Chemicals
✓ Costs ◼ Sludge production
◼ Energy
✓ Link between the sections
of the plant
WASTE WATER TREATMENT
SUMMARIZING:
◼ Chemicals
✓ Costs ◼ Sludge production
◼ Energy
✓ Link between the sections
◼ Global point of view
of the plant
WASTE WATER TREATMENT
SUMMARIZING:
◼ Chemicals
✓ Costs ◼ Sludge production
◼ Energy
✓ Link between the sections
◼ Global point of view
of the plant
WASTE WATER TREATMENT
SUMMARIZING:
◼ Chemicals
✓ Costs ◼ Sludge production
◼ Energy
✓ Link between the sections
◼ Global point of view
of the plant
✓ Environmental impact
minimization
WASTE WATER TREATMENT
SUMMARIZING:
◼ Chemicals
✓ Costs ◼ Sludge production
◼ Energy
✓ Link between the sections
◼ Global point of view
of the plant
✓ Environmental impact ◼ “Integrated Pollution
minimization Control”(air,water,ground)
WASTE WATER TREATMENT
CHIMEC, A“WATER MANAGEMENT”COMPANY, PROPOSES A SPECIFIC
APPROACH TO:
✓ Minimize the costs
✓ Minimize the environmental impact
WASTE WATER TREATMENT
COST MINIMIZATION:
✓ Treatment cost reduction
✓ Energy cost reduction
✓ Sludge disposal cost reduction
WASTE WATER TREATMENT
TREATMENT COSTS REDUCTION
✓ Treatment programs with low cost/performances
ratio
✓ Feeding and monitoring equipments to optimize
chemicals dosage and treatment results
WASTE WATER TREATMENT
ENERGY COST REDUCTION
✓ Global point of view
✓ Engineering approach
✓ Simulation capability
WASTE WATER TREATMENT
ENERGY COST REDUCTION
✓ Global point of view
✓ Engineering approach EXPERIENCE
✓ Simulation capability
WASTE WATER TREATMENT
SLUDGE DISPOSAL COSTS REDUCTION
✓ Specific treatment programs for
the sludge dewatering
WASTE WATER TREATMENT
SLUDGE DISPOSAL COSTS REDUCTION
✓ Specific treatment programs for “Cross-linked”
the sludge dewatering polymers
WASTE WATER TREATMENT
SLUDGE DISPOSAL COSTS REDUCTION
✓ Specific treatment programs for “Cross-linked”
the sludge dewatering polymers
✓ Specific treatment programs to
minimize/eliminate inorganic
coagulant
WASTE WATER TREATMENT
SLUDGE DISPOSAL COSTS REDUCTION
✓ Specific treatment programs for “Cross-linked”
the sludge dewatering polymers
✓ Specific treatment programs to Customized
minimize/eliminate inorganic organic coagulants
coagulant
WASTE WATER TREATMENT
ENVIRONMENTAL IMPACT MINIMIZATION
✓ Minimizing sludge production
✓ Reducing fresh water use (“water reuse”)
✓ Minimizing pollutants release
✓ Utilizing “green technologies”
WASTE WATER TREATMENT
CALCULATIONS
AIR
✓ Flow = 250 mc/h
✓ COD inlet = 600 ppm
✓ Energy cost = 0,05 euro/KW
✓ Sludge disposal cost = 0,08 euro/Kg
✓ % solids in the sludge = 22
WASTE WATER TREATMENT
Initial situation
The DAF plant removes only a low percentage of the COD
inlet(33%)
Outlet COD = 400 ppm
Treatment cost = 0,005 euro/mc
Annual treatment cost = 10.900 euro
WASTE WATER TREATMENT
Biologic Management Program By F. Rapuano & E. Astorino Rel.1.2B - 19/ 12/ 97
Temp. 20 °C O2 3364 Kg/d Aereator tipe Surface turbine(fast)
Teta 8 gg
days
Q1 6000 m3/d Q5 10800 m3/d
S1 0,400 Kg/m3 X2 3,46 Kg/m3 Q3 5902 m3/d
V 2000 m3 X3 0,02 Kg/m3
S3 0,001 Kg/m3
R 0,8
0,8 Q2 4800 m3/d Q4 98,0 m3/d
X4 7,605 Kg/m3
Ene rgy cost Sludge disposa l cost
Unit cost 0,05 euro/KW Sludge production 746,9 Kg/d
Total cost 60,79 Meuro/year % dry material 0,22
Unit cost 0,08 euro/Kg
Total cost 99,14 Meuro/year
WASTE WATER TREATMENT
Final situation
CHIMEC treatment program improve the COD removal of the
DAF plant (50%)
Outlet COD = 300 ppm
Treatment cost = 0.008 euro/mc
Annual treatment cost = 17.500 euro
WASTE WATER TREATMENT
Biologic Management Program By F. Rapuano & E. Astorino Rel.1.2B - 19/ 12/ 97
Temp. 20 °C O2 2521 Kg/d Aereator tipe Surface turbine(fast)
Teta days
8 gg
Q1 6000 m3/d Q5 10800 m3/d
S1 0,300 Kg/m3 X2 2,593 Kg/m3 Q3 5907 m3/d
V 2000 m3 X3 0,02 Kg/m3
S3 0,001 Kg/m3
R 0,8
0,8 Q2 4800 m3/d Q4 92,7 m3/d
X4 5,7 Kg/m3
Ene rgy cost Sludge disposa l cost
Unit cost 0,05 euro/KW Sludge production 530,2 Kg/d
Total cost 45,56 Meuro/year % dry material 0,22
Unit cost 0,08 euro/Kg
Total cost 70,37 Meuro/year
WASTE WATER TREATMENT
COST ANALYSIS
BEFORE AFTER
Treatment cost 10.900 17.500
Energy cost 60.790 45.560
Sludge disposal cost 99.140 70.370
Total 170.830 133.430
WASTE WATER TREATMENT
COST ANALYSIS
BEFORE AFTER
Treatment cost 10.900 17.500
Energy cost 60.790 45.560
Sludge disposal cost 99.140 70.370
Total 170.830 133.430
DELTA = 37.400 euro/year
Tank you for
your attention
