this ppt contains various techniques of wastewater management,it describe mainly new technique i.e. electrocaugulation

1. Submitted by
Arun yadav
3A-1
111000033

2. What is wastewater management?
 Wastewater management is the process by which all
waste water (waste from showers, toilets, sinks, both
residential and most commercial) is treated and
returned back to a receiving stream for reuse.

3. Source of wastewater
Home agricultural Industrial
http://www.sswm.info/sites/default/files/toolbox/SPUHLER%
202010%20Source%20of%20Different%20Wastewaters.jpg

4. Electrocoagulation: New method in
wastewater treatment
 Electrocoagulation is an advanced and economical
water treatment technology. It effectively removes
suspended solids to sub-micrometre levels
 Electrocoagulation is the process of destabilizing
suspended, emulsified, or dissolved contaminants in
an aqueous medium by introducing an electrical
current into the medium.

5. Requirements of EC
 EC reactor is made up of an electrolytic cell with one
anode and one cathode. EC system essentially consists
of pairs of conductive metal plates in parallel, which
act as monopolar electrodes. It also required sacrificial
anodes. The requirements to operate EC are
a. Direct current power source
b. Resistance Box
c. Multimeter

6. Schematic Diagram
http://www.worldofchemicals.com/article/18/EC-reactor-electrodes.jpg

7. EC setup

8. Working
http://payload.cargocollective.com/1/0/20818/2289083/ststem-overview.png

9. Advantages
 Removes suspended and colloidal solids
 Breaks oil emulsions in water
 Removes fats, oil, and grease
 Removes complex organics
 Destroys and removes bacteria, viruses and cysts
 Color removal up to 95%
 BOD removal > 60%
 COD removal > 70%

10. Benefits
 Supplied as a skid mounted unit, fully assembled for
inlet/outlet and backwash connections
 Low operating costs
 Low power requirements
 Minimal chemical additions
 Low maintenance

11. Disadvantages
 The ‘sacrificial electrodes’ are dissolved into
wastewater streams as a result of oxidation, and need
to be regularly replaced.
 The use of electricity may be expensive in many
places.
 High conductivity of the wastewater suspension is
required.

12. Applications
 Ground Water Cleanup
 Surface Water Cleanup
 Sewage Treatment

13. Reclamation and Reuse of treated
water
 Irrigation
 Industrial use
 Recreational uses
 Groundwater recharge
 Potable reuse