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PRESENTATION BY:
Kumuda J.
WASTE WATER
TREATMENT
Waste
water
Dissolved
Organic
Compounds
Chemicals
and
Minerals
Suspended
Solids
Pathogenic
Microbes
1. INTRODUCTION
Waste
Water
Treatment
Physical
Treatment
Chemical
Treatment
Biological
Treatment
2. WASTE WATER TREATMENT
Figure 01: Schematic
Representation of Waste Water
Treatment
2.1. PHYSICAL
TREATMENT
Screening
SedimentationFloatation
Figure 02: Screening Figure 03:Sedimentation
Neutralization
• Acidic wastes- ammonia,
caustic soda, lime
• Alkaline wastes-sulfuric acid
or hydrochloric acid.
Coagulation
• Flash mix basins-disperse
the coagulant
• Alum, Ferrous Sulfate
Flocculation
• Aggregates or flocs
• Mechanical or air
agitation.
2.2.
CHEMICAL
TREATMENT
2.3.
BIOLOGICAL
TREATMENT
Aerobic
Treatment
Anaerobic
Treatment
2.3.1.
AEROBIC
TREATMENT
Activated
Sludge
Sequential
Batch
Reactor
RBC
Fluidized
Bed
Rotating
Drums
Towers
Trickling
Filter
ROTATING BIOLOGICAL CONTACTOR
Figure 04
ACTIVATED SLUDGE
Figure 05
FLUIDIZED BED REACTOR
Figure 06
TRICKLING FILTER
Figure 07
Organic
pollutants are
converted by
anaerobic micro-
organisms to a
gaseous product
Very low energy
process
Ideal for treating
wastewater which
is high in soluble
BOD and/or
COD
Used in larger
municipal plants,
food and
beverage, pulp
and paper and
petrochemical
industrial
wastewater
applications
2.3.2. ANAEROBIC TREATMENT
3. LEGISLATIONS IN INDIA
Centre State
Local
bodies
WATER POLICIES
• Water privatization initiatives in India
The National
Water Policy 2002
• Equity of access.
• Adherence to benchmarks relating to the
services of public or private operators.
• Protection of consumer rights.
Water Resources
Regulatory
Authority Act
UNITED STATES
• Technology-based effluent
discharge limitations
• Initiated the National Pollutant
Discharge Elimination System
permit program for municipal and
industrial point source dischargers.
The Clean Water
Act (CWA), 1972.
• Prohibit or limit discharges of
pollutants.
• Federal Categorical Standard -
regulate sewer discharges.
National Pre-
treatment Program
THANK YOU!!

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