application of our - rastgar-co.com
TRANSCRIPT
Application of our
products in Waste-water
treatment plant24th April’19
Syed Salman Mohiuddin (Blower & Vacuum
Division)
Today’s Content• Recitation of verses from Holy Quran
• CEO’s message & presentation
• Introduction to our company
• ETP Application
• Product Portfolio
• Q & A session
• Visit to our premises
• Group Photograph
• Prayers & Lunch
Introduction to Rastgar
Rastgar & Co. is a known name nationwide
apropos sales, marketing, technical & after-market
services of wide range of industrial air
compressors & allied pneumatic equipment. The
company leverages significant brand equity of
Compair through other products; radial
compressor, industrial blower, vacuum pump etc.
Introduction to Rastgar
ETP
Effluent treatment plant (ETP) is designed to
treat the industrial sewage and waste-water
to make it appropriate enough to release it
back to the environment safely by killing the
pathogens & clear the harmful chemicals,
toxins & extract the reusable water
(treatable) & other important substances
from the effluents.
ETP
According to central & provincial
Environmental & Protection agencies active
nationwide, there are more or less 1,500
process industries in all producing waste-
water that must be treated before disposing
off. While, 150-200 have effluent treatment
plants installed at their premises, with few of
them filtering it further for re-use in their
process.
Effluent (Textile)
Generally textile mills consume large volume
of water for various processes such as
sizing, de-sizing, & scouring, bleaching,
mercerization, dyeing, printing, finishing &
ultimately washing. In fact, in a practical
estimate, it has been found that 45%
material in preparatory processing, 33% in
dyeing and 22% are re-processed in
finishing.
Effluent (Textile)
Effluent (Tannery)
Leather tanning in Pakistan creates heavy
metals (chromium, cadmium etc.), various
organic chemicals & acids. The sample of
tannery effluent contains Cu 0.30 mg/l,
Cadmium 0.15 mg/l, Zn 7 mg/l, Ni 1.14 mg/l
& Pb 1.8mg/l.
ETP Steps
Preliminary Treatment
Preliminary devices are designed to remove or cut up the
larger suspended and floating solids, to remove the
heavy inorganic solids, and to remove excessive
amounts of oils or greases.
Following devices are commonly used:
1. Screens -- rack, bar or fine
2. Comminuting devices -- grinders, cutters, shredders
3. Grit chambers
4. Pre-aeration tanks
ETP Steps
Primary Treatment
Purpose of primary treatment is to reduce the velocity of
the wastewater sufficiently to permit solids to settle and
floatable material to surface.
Primary devices may consist of settling tanks, clarifiers
or sedimentation tanks.
ETP Steps
DAF (Dissolved air floatation)
DAF system is preferably used for primary treatment to
remove the contaminant load in textile & tannery
industries.
The removal is achieved by dissolving air in the water or
wastewater under pressure and then releasing the air at
atmospheric pressure in a flotation tank or basin. The
released air forms tiny bubbles which adhere to the
suspended matter causing the suspended matter to float
to the surface of the water where it may then be removed
by a skimming device.
ETP Steps
Advantages of DAF (Dissolved air floatation)
• Efficient at removing particles and turbidity resulting in
more economical filter designs.
• Allow for short detention times (5-10 min) in
flocculation tanks.
• Can use higher hydraulic loading rates than most
settling processes.
• More efficient at removing floc particles than most
settling processes.
• More efficient than sedimentation in removing low-
density floc formed from coagulation of TOC.
ETP Steps
Advantages of DAF (Dissolved air floatation)
• Allows for lower coagulant dosages resulting in
smaller chemical storage and less sludge.
• Smaller footprints with stacked flotation over filtration
arrangement.
• Improved algae removal and cold water performance.
• Less sensitive to flow variations.
• Process flexibility through air loading
ETP Steps
Empty aeration tank
ETP Steps
Filled aeration tank
Compact Treatment Plant
Construction
CTP unit is composed of a circular outer shell and
concentric inner tank. The outer tank acts as an aeration
tank, while the inner one acts as Settlement Tank.
A baffle wall in the annulus space of each CTP unit is
provided to ensure that the influent completes the full
circle before being admitted into the inner settlement
tank via specially designed pipe work.
ETP Steps
Compact Treatment Plant
ETP Steps
ETP
To have a recognized brand name.
To have the right technology as blowers, pumps. (Market
was still related to traditional technologies)
To have the right price but not yet much affected by
many competitors
AND, OF COURSE
To have a good sales team able to offer a product
package (not just blowers but also diffusers, dosing
pumps, analyzer, probe)
AND - A Complete maintenance & After Sales package
To be in the waste water treatment, up to 15
years ago, meant..
Rastgar - Celar
Water-treatment services
• Reverse Osmosis Systems
- Brackish water RO
- Sea water RO
- Double pass RO
- CIP
• Sewage Treatment Plant
- Submerged aeration fixed film (SAFF)
- Fluidized Media Bio Reactor (FMBR)
- Membrane Bio Reactor (MBR)
- Grey Water Treatment
- Extended Aeration System
• Filtration System
- Micro / Ultra filtration system
Water-treatment services
• Ultraviolet System
• Components
- Vessels
- Pumps
- Filters
- Valves
- Instrumentation & Control etc
Water-treatment services
Reverse Osmosis
Sewage TreatmentSewage treatment, or domestic wastewater treatment, is
the process of removing contaminants from wastewater
and household sewage, both runoff (effluents) and
domestic. It includes physical, chemical, and biological
processes to remove contaminants. The objective of the
treatment plant is to produce a waste stream (or treated
effluent) and a solid waste or sludge suitable for
discharge or reuse back into the environment. This
material is often inadvertently contaminated with many
toxic organic and inorganic compounds.
Sewage Treatment
Media Filters are used to reduce the level of suspended
solids like clay, organic matter, algae and other
microorganisms in water. These filters are highly
effective in removing sediments that are 5-15 microns in
size or even larger.
Media Filtration Systems:
• Carbon Filter
• Green Sand Filter
• Multi Media Filter
• Pyrolox Filter
Filtration System
Filtration System
Mechanicals
Application in WWTP
1. Lobe blowers for air bubbles degritting systems
2. Lobe blowers + screw compressor for air bubble
oxidation systems
3. Blowers for sand filters backwash systems
4. Centrifugal pumps on sludge
Blowers
Side-channel blowers
Side-channel blower
accessories
Side-channel blower
accessories
Roots lobe blowers
Roots lobe blowers
Axial & Centrifugal fan
• They are designed to meet either standard
applications or special working conditions.
Our fans can be built both in fabricated
steel or special alloys, according to
customers specifications. The working
range is from 50 to 1,000,000 m3 of flow,
with working pressure between 0.5mbar &
500mbar. The wing profile of impellers
grant higher efficiency.
Axial & Centrifugal fan
Diffusers
• Membrane Disc & Tubular Diffusers
Designed to meet either standard
applications or special working conditions.
- Oxygen range: 25-40%
- Diameter: 250, 320, 350 mm
- Length: 300, 600, 1,000 mm
Diffusers
Activated sludge treatment
versus air/O2 demand
Qa (flow rate): We can offer a package able to follow the
air need (variable Qa). Means an integrated Electrical
panel with VSD??
> Plug and play configuration.
e (compressor efficiency). Can we use a high efficiency
technology instead of blower technology.
> Low pressure screw.
Service & After market
We offer the most comprehensive sales &
service network in the industry.
We have in place a highly competent & well-
trained service team capable of meeting our
customer’s service requirements from A to
Z.
Our state-of-the-art workshop & service
center are equipped with latest technology
to ensure quality & timely services.
Water Treatment Seminar
On: 18th June’19
Venue: Ramada Plaza
Speaker: Mr. Lawrence Al Halabi (International
Sales & Services Mngr, CELAR)
Speaker: Mr. Ramiz Nino (Authorized
representative of Becker & IVACO in ME)
ETP
Thank You!
• SALES • SOLUTIONS• SPARES• SERVICE