For Water & Waste Water Treatment: Cleaner Technologies
For Water & Waste Water Treatment: Cleaner Technologies
For Water & Waste Water Treatment: Cleaner Technologies
For
WATER & WASTE WATER
TREATMENT
• Afforestation
• Bio-diversity
Other Technologies
•Electrodeionisation
•Ozonation
Membrane Processes
• Ultra filtration and Reverse osmosis are the two fastest
growing membrane technologies.
RO MODULE
HIGH PRESSURE
PUMP
PERMEATE
WATER SOLUTION
REJECT
Advantages of Reverse Osmosis
• Operating cost less than DM plant for higher TDS
• No regeneration – No chemical waste
• Variation in TDS does not significantly alter
performance of reverse osmosis
• Better purification
• Expand capacity at minimum cost
• In addition to dissolved salts, RO removes colloids,
organics and bacteria
• RO can be used to recycle and reuse treated
waste water
MEMBRANE BIO REACTOR
SUBMERGED MEMBRANE TECHNOLOGY
Ultrafiltration in MBR
MEMBRANE BIO REACTOR
Air Line
Treated
Wastewater inlet water
Vacuum
pump
Aeration Membrane
Tank Module
Sludge
outlet
Operation of MBR
• Immersed Ultrafiltration membrane system
CONVENTIONAL ASP
100%
MBR SYSTEM
25%
CASE STUDY
Use of membrane technologies to maximise
recovery in Textile Industry
à Textile Common Effluent Treatment Plant in Tirupur in
Southern India.
à Faced Closure if Zero Discharge not implemented
à TOTAL TREATMENT CAPACITY - 10000 Cu.m. per day
à A trouble free and trusted process to maximize recovery
and product recovery was essential
à Necessary for lowest waste generation from treatment
process
à Pilot Trials carried out for 50 and then at 500 m3/day to
choose scheme.
à Some factors deciding scheme and also membrane flux:
Equali- Activated
Bar sation HRSCC Sand carbon
Screen tank filter filter
Polymer
SBS dosing
FeSO4
Lime
Filter feed
pump
RO
Feed
Reject tank
NF – Reject 18%
management RO - II RO - I IEX
system
Final
Brine solution
Reject
7–8%
82%
Brine
Permeate
solution
TREATED WATER
TDS : < 250 ppm
REJECT
Quantity of reject : 7–8%
BRINE SOLUTION
Quantity of brine solution
(Reusable) : 10%
ELECTRODEIONIZATION
---Replacing conventional technologies for Polishing
water
EDI Technology
Ultrapure
regen)
OH
H
Na
(+) Cl
(-)
• No chemicals Cl
Cl
• Upflow design
Na
Na
On site oxygen
preparation
systems
Treated water out
Feed gas
Ozone generation Ozone contacting Vent ozone destruction
preparation
Advantages and benefits of
ozone
• Most powerful disinfecting agent
available industrially
• Removal of color, taste and odor
• Support for flocculation
• Economical
• Safe and largely experienced process
• Environmentally favorable
• No Trihalomethanes as by-product
Applications of Ozone
• Drinking water • Leachates