This document provides an overview of waste water treatment processes. It discusses 3 stages of treatment: physical, chemical, and biological. Physical treatment includes screening, sedimentation, and flotation to remove solids. Chemical treatment uses neutralization, coagulation, and flocculation to remove dissolved and suspended materials. Biological treatment occurs in aerobic processes like activated sludge and anaerobic digestion to break down organic pollutants. The document also briefly discusses water treatment laws and regulations in India and the United States.

1. PRESENTATION BY:
Kumuda J.
WASTE WATER
TREATMENT

2. Waste
water
Dissolved
Organic
Compounds
Chemicals
and
Minerals
Suspended
Solids
Pathogenic
Microbes
1. INTRODUCTION

3. Waste
Water
Treatment
Physical
Treatment
Chemical
Treatment
Biological
Treatment
2. WASTE WATER TREATMENT

4. Figure 01: Schematic
Representation of Waste Water
Treatment

5. 2.1. PHYSICAL
TREATMENT
Screening
SedimentationFloatation

6. Figure 02: Screening Figure 03:Sedimentation

7. 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

8. 2.3.
BIOLOGICAL
TREATMENT
Aerobic
Treatment
Anaerobic
Treatment

9. 2.3.1.
AEROBIC
TREATMENT
Activated
Sludge
Sequential
Batch
Reactor
RBC
Fluidized
Bed
Rotating
Drums
Towers
Trickling
Filter

10. ROTATING BIOLOGICAL CONTACTOR
Figure 04

11. ACTIVATED SLUDGE
Figure 05

12. FLUIDIZED BED REACTOR
Figure 06

13. TRICKLING FILTER
Figure 07

14. 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

15. 3. LEGISLATIONS IN INDIA
Centre State
Local
bodies

16. WATER POLICIES

17. • 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

18. 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

19. THANK YOU!!