rosa introduction for water treatment plant

ROSA 7.2Training

January 20110 2

Index1. Input data for analysis

2. Plant Design using ROSA 7.2 Project Information Feedwater Data Scaling Information System Configuration Report Cost Analysis

3. Example

January 20110 3



3. Example

January 20110 4

Input data for analysis1. Feed water data:

Feed water type: Seawater, bore hole, surface supply, tertiary effluent, RO permeate.

RO pre-treatment: Conventional pretreatment, MF or UF pretreatment

Water composition: Answer Center: 2307

2. Permeate / Feed flow / Recovery3. Operating temperature range (maximum and

minimum temperature)4. Permeate quality requirements, e.g. TDS < 70 ppm,

SiO2 < 0.05 ppm 5. Focus on CAPEX or OPEX

January 20110 5

5. Focus on CAPEX or OPEX

Focus on minimizing capital costs (CAPEX):Implications: Maximize system flux Minimize number of elements and vessels

Focus on minimizing operational costs (OPEX):Implications: Lower system flux Higher number of elements and vessels Prefer low energy membranes

Focus on capital or operation costs

January 20110 6



3. Example

January 20110 7

Project Information Feedwater Data Scaling Information System Configuration Report Cost Analysis

Plant Design using ROSA

January 20110 8



January 20110 9

ROSA – Control Panel: File

January 20110 10

ROSA – Control Panel: Options

Batch Processor:

allows the software to run multiple projections

automatically

January 20110 11

Batch ProcessorINPUT VARIABLES Flow Factor: Start-up and Long term Temperature: Maximum & Minimum and desired number of

intermediate points Possibility to activate the “High Temperature Effect”

OUTCOME ROSA will generate projections for each temperature at

each Flow Factor indicated Projections can be stored in the same folder as the ROSA

file A summary excel file can be generated as well. The

parameters to be included in this summary should be indicated and chosen by the user

January 20110 12

Batch Processor

2. Input parameters: Indicate temperature range, FF and “high temperature effect”

3. Output parameters: Select from the list those parameters to be included in the summary table

1. Go to options>Batch processor once feedwater & design are defined

January 20110 13

INPUT

10ºC 15ºC 20ºC 25ºC 30ºC

FF 1

FF 0.8

Batch Processor - Example

Temperature Flow Factor (FF) Intermediate points, nº

Minimum Maximum Start up Long term3

10ºC 30ºC 0.80 0.75 – 0.65

Note: in case of a two passes system, FF for both passes should be indicated.

OUTPUTThe following projections will be automatically generated

January 20110 14

Batch Processor – Outcome IOnce all the simulations are finished, the user is asked tosave the results as a summary excel file

January 20110 15

Batch Processor – Outcome IIAs a result, the user will get all the projections and thesummary excel fileNote: to ensure projections are saved in the same folder as the originalROSA file -> go to options -> files and folders and select:save the output file in the same folder as the input file

ROSA file

Generated projections

Summary file

January 20110 16


Database can be updated using Database switching tool

January 20110 17


When first opened it shows where the ROSA files are stored by default

Can be changed according to the personal preferences

January 20110 18


User Data Settings – stores introduced and selected information

January 20110 19

ROSA – Control Panel: Help

January 20110 20

ROSA – Project descriptionProject basic information

January 20110 21

ROSA – Limiting Scenarios

We should consider the two limiting scenarios:

A) Highest T + Highest FF (short term conditions) + Highest feed TDS

Worst scenario in terms of salt passage and hydraulics of the system (highest flow rate in first elements)

B) Lowest T + Lowest FF (long term conditions) + Highest feed TDS

Worst scenario in terms of energy demand (useful for sizing the high pressure pump)

January 20110 22

Flow Factor Concept: FF = 1.0 Nominal element flow performance according

to specification FF = 0.80 80% of nominal element flow performance

Long term FF (+ 3 years) depends strongly on: Temperature, raw water source, pre-treatment, feed pressure, etc.

Flow Factor

Membrane Start up (expected)

+ 3 years

(fouling excluded, clean membrane)

+ 3 years (expected, fouling included)

BW 1.0 0.80 0.75 – 0.65

SW 1.0 0.80 0.70 – 0.65

ROSA – Flow Factors

January 20110 23

Pre-stage Pressure Drop (ΔP) can be defined

If the specific ΔP is not known, leave the default value

ROSA – User Defined Pre-stage Pressure Drop

January 20110 24



January 20110 25

Choose Feed water type

Introduce the T and pH

Cations and Anions should be balanced

Introduce the water analysis data1. Check the box: Specify individual solutes2. Introduce the concentrations

ROSA – Introducing Feed water analysis

January 20110 26

Choosing Feed Water Type

• For more information refer to Answer Center answer 209

Feed water type Description

RO Permeate SDI<1 Very-low-salinity, high-purity waters (HPW) coming fromthe first RO systems (double-pass RO system) or thepolishing stage in ultrapure water (UPW) systems with TDSup to 50 mg/L.

Well Water SDI<3 Water from a ground source that has been accessed via well. Usually, has low fouling potential.

Surface Supply SDI<3 Water from rivers, river estuaries and lakes. In most cases it has high TSS, NOM, BOD and colloids. Frequently, surface water quality varies seasonally.Surface Supply SDI<5

Tertiary Effluent (Microfiltration) SDI<3

Industrial and municipal wastewaters have a wide variety of organic and inorganic constituents. Some types of organic components may adversely affect RO/NF membranes, inducing severe flow loss and/or membrane degradation (organic fouling).

Tertiary Effluent (Conventional) SDI<5

Seawater (Well/MF) SDI<3 Well -water from a beach well with any type of pre-treatmentMF –Seawater any type with Microfiltration/Ultrafiltration as a pre-treatment

Seawater (Open Intake) SDI<5 Open intake seawater with conventional pre-treatment

January 20110 27

Choosing Feed Water Type

• For more information refer to Answer Center answer 209

SDI specification Description

SDI<1 RO permeate

SDI<3 Before RO very good pre-treatment is used: Microfiltration, Ultrafiltration

SDI<5 Conventional pre-treatment is used before RO.

SDI Calculation

1001

% 30

T

tt

TPSDI f

i

T

Where:%P30 – percent @ 30 psi feed pressureT – total elapsed flow timeti – initial time required to collect 500 ml sampletf – time required to collect 500 ml sample after

test time T

January 20110 28

ROSA – Saving the Water Profile

Previous water profiles can be loaded

Current water profile can be added to the library

January 20110 29

ROSA – Temperature History Effect

Only for SWRO cases

January 20110 30

Temperature History Effect -SWRO designs

RO operation at elevated temperatures (35ºC and above) causes an irreversible flow loss that becomes apparent if the system is later operated at lower temperatures (20-35ºC).

This is a phenomenon common to all thin film composite RO membranes operated under similar conditions.

January 20110 31

Temperature History Effect -SWRO designs The reduction of permeate flow is usually a combination of both

elevated pressure and temperature and the effect is strongest when elevated temperature and pressure occur simultaneously.

While a number of factors impact this permeate flow loss, the major factors are believed to be:

• Compaction of the microporous polysulfone layer which decreases membrane permeability. Long recognized but not well quantified.

• Intrusion of the membrane composite into the permeate carrier, leading to increased permeate-side pressure drop. This is a function of temperature and pressure, as well as spacer geometry and strength of the composite membrane.

Due to the relatively low pressure in brackish water applications, the performance impact of elevated temperature is much lower compared to seawater conditions.

January 20110 32



January 20110 33

ROSA – Scaling information

January 20110 34



January 20110 35

ROSA - Introduction of known dataThe Flow Calculator New way to enter project input Flows and recoveries of both passes can be

defined at the same time The quantity of permeate blending or permeate

split can be determined at the same time

January 20110 36

ROSA - Introduction of known dataTo introduce the Flow and Recovery data:

1. Double click on any of the boxes: Permeate Flow, Recovery, Feed Flow or Permeate Flux

2. Pop-up window (Flow Calculator) will appear

3. Specify two parameters to be introduced by checking the Specify box

4. Introduce the data

5. Click on Recalculate

6. Click on Accept Changes and Close

January 20110 37

Main components of a membrane system

Pump Concentrate line

Feed Water

Main components:pump(s), pipes, pressure vessel(s), membrane element(s)

Permeate line

One or more pressure vessel(s) containing one or more membrane elements

January 20110 38

Serial arrangement of membrane elements in a pressure vessel

RO FILMTEC™ element

Main components of a membrane system

January 20110 39

ROSA – Membrane Element Selection

January 20110 40

According to:

i. System capacity

ii. Feed water TDS

iii. Feed water fouling potential

iv. Required product water quality and Energy requirements

Select the membrane element type

Membrane Element Selection

January 20110 41

i. According to System capacity Element diameter for system capacity of about

2.5” < 200 l/h

4.0” < 2.3 m3/h

8.0” > 2.3 m3/h

Element length

Standard: 40” (1016 mm)

For small compact systems: 21” or 14”


January 20110 42

ii. According to Feed water TDS (Rules of thumb)

< 1000 mg/l NF270, NF90, XLE, LE, LP, TW30, BW30

< 10 000 mg/l BW30

10 000 - 30 000 mg/l SW30XLE, SW30ULE

30 000 - 50 000 mg/l SW30HR, SW30XHR, SW30HRLE, SW30XLE


January 20110 43

iii. According to Feed water fouling potential

Standard feed spacer thickness: 28 mil

Feed spacer thickness for feeds with increased fouling potential: 34 mil used in BW30-400/34i, BW30-365, BW30-365-FR, XFRLE-400/34i, BW30XFR-400/34i, SW30HRLE-370/34i

Fouling resistant BW membrane for biofouling prevention - used in XFRLE-400/34i, BW30XFR-400/34i, BW30-365-FR


January 20110 44

iv. According to Required product water quality and Energy requirements

Higher salt passage

Lower Salt passage

Lower feed pressure

Higher feed pressure


NF270NF90XLELE

BW30 / TW30BW30XFRBW30HRSW30ULESW30XLE

SW30HR / SW30HR LESW30XHR

January 20110 45

ROSA – Configuration design

January 20110 46

Pump Concentrate line

Feed Water Permeate line

Configuration - Single vessel system

100 m3/day

50 m3/day

50 m3/day

One pressure vessel containing one or more membrane elements

50%Flow Feed

Flow PermeateRecovery For low flow rate For low system recovery

January 20110 47

Pressure vessels in parallel with common feed, concentrate and permeate connections

For higher permeate flow rates For modest system recovery Typical in seawater desalination Permeate

Pump

Concentrate

100 m3/day

50 m3/day

50%Flow Feed

Flow PermeateRecovery

Configuration - Single stage system

January 20110 48

Use for higher recovery Typical 75% recovery with 6-element vessels

Pump

Concentrate

Permeate

Concentrate

Two stage systemConfiguration - Multistage

January 20110 49

Pump

Permeate

Concentrate

Use for higher recoveryTypical 85% recovery with 6-elements vesselsUp to 90% depending on the feed water quality

Permeate: 50 m3/day per PV

Feed: 400 m3/day

%85

400

50100200Flow Feed

Flow PermeateRecovery

Three Stage System

Permeate: 50 m3/day per PV

Permeate: 50 m3/day

Configuration - Multistage

January 20110 50

Number of serial element positions should be higher for

Higher system recovery

Higher fouling tendency of the feed water

Number of stages depends on

Number of serial element positions

Number of elements per pressure vessel

Configuration – Number of stages selection

January 20110 51

Configuration – Number of stages selectionN u m b er o f s tag es o f a b rac k ish w ater s ys tem

S yste mR ec o very (% )

N u m b e r o f se ria le le m en t p o sitio n s

N u m b e r o f s ta g e s(6 -e le m e n t ve s s els )

4 0 – 60 6 17 0 – 80 1 2 28 5 – 90 1 8 3

Number of stages of a sea water system

System Recovery (%)

Number of serial element positions

Number of stages (6-element vessels)



35 - 40 6 1 1 - 45 7 - 12 2 1 1 50 8 - 12 2 2 1

55 – 60 12 - 14 2 2 -

January 20110 52

Multistage systems: Staging ratio calculation

1)(iN(i)NR

V

V

R Staging ratio

NV(i) Number of vessels in stage i

NV(i +1) Number of vessels in stage (i +1)

Y System recovery (fraction)n Number stages

n1

Y)-(11 R

Calculate number of vessels of first stage NV(1)

R 1N (1)N 1-

VV

R R 1N (1)N 2-1-

VV

For 2 stage system

For 3 stage system

January 20110 53

The active stage/Pass is highlighted

Click on the system configuration to move from one stage to another

Typical staging ratio:

1.5 sea water systemswith 6-element vessels

2 brackish water systemswith 6-element vessels

3 2nd pass RO systems

Multistage systems: Staging ratio calculation

January 20110 54

Way to increase recovery by recirculating reject to increase feed flow Typical for special / waste water applications Typical for single vessel systems

Pump

Recycle

Permeate

Concentrate

Configuration – Concentrate recycle

January 20110 55

Permeate from first array goes into another array Use when standard permeate quality is not sufficient For high purity applications Sometimes part of first pass permeate is blended with the second pass

permeate stream: second pass size can be reduced.

Pump

FeedWater

Concentrate(drain)

Concentrate(sidestream)

Final PermeatePass 1 Pass 2

Configuration – Double pass

(First pass permeate blending)

January 20110 56

To the second pass goes only the permeate produced by the first pass rear elements.

Double pass with permeate split-stream

Feed Concentrate

Rear Permeate

Front Permeate

Concentrate (drain)Final Permeate

Feed

PumpPass 2

Rear Permeate

Front Permeate

Pass 1

January 20110 57

Rule 1: The permeate quality produced by the front elements of the

pressure vessel is always better than the quality of the permeate

produced by the rear elements.

Why?

39181 44164 49422 54700 59700 64178 68000

Salinity gradient in the feed water channel (ppm)


January 20110 58

Rule 2: Elements in front position in the pressure vessel produce more permeate than the rear position elements.

Why?

39181 44164 49422 54700 59700 64178 68000

Pressure gradient in the feed channel (bar)61.6 61.3 61 60.8 60.6 60.4 60.3

Salinity gradient in the feed water channel (ppm)

Higher Salinity Higher Osmotic Pressure Lower Production

Lower Feed Pressure Lower Production


January 20110 59

Double pass with permeate split-stream25.12

21.02

17.03

13.3710.21

7.635.62

0

5

10

15

20

25

30

1 2 3 4 5 6 7

Posición elemento dentro caja de presión

Caud

al p

erm

eado

pro

duci

do

(m3/

día)

83.76110.16

147.74201.69

279.03

389.47

544.81

0

100

200

300

400

500

600

1 2 3 4 5 6 7

Posición elemento dentro caja de presión

TDS

per

mea

do (p

pm)

perm

eate

flo

w

prod

uced

(m

3/da

y)

Perm

eate

TD

S (p

pm)

Element position within the pressure vessel Element position within the pressure vessel

Feed Concentrate

Rear Permeate

Front Permeate

Concentrate (drain)Final Permeate

Feed

PumpPass 2

Rear Permeate

Front Permeate

Pass 1

January 20110 60

Permeate Split

January 20110 61

Permeate Split

January 20110 62

Nº of Elements per Pressure Vessel Selection

January 20110 63

Number of elements per vesselLarge 8-inch systems

Benefits of vessels for 7 to 8 elements:

• lower capital costs

• higher recovery possible with same number of stages

Benefits of vessels for 6 and less elements:

• less pressure drop

• better cleaning results

• more compact

• more stages for better hydraulic design

Nº of Elements per Pressure Vessel Selection

January 20110 64

Nº of elements selection: Average system fluxSelect the design flux (f) based on

• pilot data

• customer experience

• typical design fluxes according to the feed source found in System Design Guidelines

• CAPEX or OPEX focus

NE: number of elements QP: design permeate flow rate of systemf: fluxSE: active membrane area of the selected element

E

PE

SfQN

January 20110 65

Multistage systems: Balance the permeate flow rate

Permeate flow rate per element decreases from the feed end to the concentrate end of the system because of• Pressure drop in the feed/concentrate channels• Increasing osmotic pressure of the feed/concentrate

Imbalance of permeate flow rate predominant with• High system recovery

• High feed salinity• Low pressure membranes• High water temperature• New membranes

January 20110 66

Why balance the permeate flow rate?• Avoid excessive flux of lead elements• Reduce fouling rate of first stage• Make better use of tail end membranes• Reduce number of elements• Improve product water quality

Methods to balance the permeate flow rate• Boosting the feed pressure between stages• Permeate backpressure to first stage only

• Membranes with lower water permeability in lead positions -membranes with higher water permeability in tail positions

Multistage systems: Balance the permeate flow rate

January 20110 67

Each element in a system should operate within certain limits To minimize concentration polarization:

•permeate flow rate below upper limit

•element recovery below upper limit

•concentrate flow rate above lower limit To avoid physical damage:

• feed flow rate below upper limit

•pressure drop below upper limit

• feed pressure below upper limit

System design guidelines

January 20110 68

System design guidelines

January 20110 69

Principle: Elements with the lowest production and highest rejection in the first positions and elements with the highest production in the rear positions of the vessel

Advantages vs. conventional configuration• Better hydraulics resulting in lower flux in the front modules:

o Lower fouling potential -> lower energy requiredo Less cleaning needed -> longer membrane life

• Lower energy requirement for a given production and/or higher production for a given pressure due to the use of high flow elements in the rear positions

Configuration – Internally Staged Design

Internally Staged Design (ISD)

Conventional

January 20110 70

6 x SW30HRLE-400i (7,500 gpd) Recovery system 37.11%

6 x SW30ULE-400i (11,000 gpd)Recovery system 42.42%1 x SW30HRLE-400i + 1 x SW30XLE-400i + 4 x SW30ULE-400iRecovery system 41.80%

* Feed pressure: 56 bar

* Feed TDS: 35,000 ppm

* Feed flow: 12,4 m3/h

1 x 7,500 gpd + 1 x 9,000 gpd + 4 x 11,000 gpd

0.3

0.5

0.7

0.9

1.1

1.3

1.5

1.7

1 2 3 4 5 6

Element Position

Perm

eate

flow

rat

e (c

mh)

SW30HRLE400i

Maximum FlowGuideline

0.3

0.5

0.7

0.9

1.1

1.3

1.5

1.7

1 2 3 4 5 6

Element Position

Perm

eate

flow

rat

e (c

mh)

SW30HRLE-400i

SW30ULE400i


0.3

0.5

0.7

0.9

1.1

1.3

1.5

1.7

1 2 3 4 5 6

Element Position

Perm

eate

flow

rat

e (c

mh)

Internally StagedDesignSW30HRLE-400i

SW30ULE400i


Conventional

ISD


January 20110 71

Average Flux of the vessel (L/m2h) 14 15.76

Maximum permeate flow per element 0.99 0.99

COST (UScts/m3) Highest FF & T 60.14 58.27

COST (UScts/m3) Lowest FF & T 63.65 60.05

% savings on cost of water*

Highest FF & T Lowest FF & T

3.1%5.7%

SW30HRLE-400i SW30XHR-400i SW30ULE-400i

* COST CALCULATION (TOOLS): CAPEX and OPEX are taken into account. Model is prepared by a Consulting Company* for Dow (John Tonner Water Consultants International Inc.)


January 20110 72


January 20110 73


January 20110 74



January 20110 75

Example - ROSA Report

January 20110 76


Designs of systems in excess of the guidelines

results in a warning on the ROSA Report.

January 20110 77

Warnings and typical solutions – For one stage systemsDesign warning Solutions

Max. element permeate flow exceeded 3, 5, 7, 11

The concentrate flow less than minimum 1, 5, 4 together with 6

The feed flow greater than maximum 2 unless the feed flow is fixed, 3

Maximum feed pressure exceeded 1, 3, 8

Temperature is above acceptable value 10

Max. element recovery exceeded:

• If the problem is encountered in front elements• If the problem is encountered in rear elements

1, 5, 6, 111, 5, 6

Decrease system recovery

Enable a recirculation loop Pass 1 Conc to Pass 1 Feed (normally not used for SW appl.)

Decrease the number of elements per PV (keeping the same APF*)

Reduce average system flux (add membranes, PV) Combine two element types:

lower energy elements in rear positions (ISD configuration)

Increase the number of elements per PV (keeping the same APF*)

Install lower energy membranes or ISD with lower energy membranes

Reduce Temp (recommend customer to reduce temp during pretreatment).Increase system recovery

Reduce number of PV (increasing average system flux)

1

2

4

3

6

58

7

10

11

Solutions Guide

*APF – Average Permeate Flux

January 20110 78

Warnings and typical solutions – For multistage systemsDesign warning Solutions

Max. element permeate flow exceeded 3, (5), 6, 10, 13

The concentrate flow less than minimum 1, 4, (5), 6, 7, (10 and 11 only for the 1st stage)

The feed flow greater than maximum in any of the stages 2, 3

Maximum feed pressure exceeded 1, 3, 9

Temperature is above acceptable value 12

Max. element recovery exceeded:• If the problem is encountered in front elements (front stage/s)• If the problem is encountered in rear elements (rear stage/s)

1, (5), 6, 7, 10, 131, (5), 7

Solutions Guide

Decrease system recovery

Enable a recirculation loop: Pass 1 Conc to Pass 1 Feed (normally not used for SW appl.)

Decrease the number of elements per PV (keeping the same APF)

Increase number of PV (reducing average system flux)

Use a lower active area membrane element (keeping the same APF)

Combine two element types: lower energy elements in second or third stages

Increase the number of elements per PV (keeping the same APF)

Install lower energy membranes or ISD with lower energy membranes

Reduce Temp (recommend customer to reduce temp during pretreatment).

Increase system recovery

Reduce number of PV (increasing average system flux)

12

4

3 7

59

8 12

11

13

Add backpressure in first and/or second stages permeate streams

Add booster pump in first or second stage concentrate6 10

*APF – Average Permeate Flux

January 20110 79

ROSA – Checking Second Limiting Scenario: Lowest T + Lowest FF

• Example: Lowest T= 16 ºC, low Flow Factor

To change from one case to another we can use 3 ways:

1.Click on the drop-down list

2.Move the cursor on the bar

3.Click next to the number

First add a new case, the previous data will be copied automatically

January 20110 80



January 20110 81

Cost Analysis - Element Value Analysis (EVA)

The Element Value Analysis (EVA) tool has been added to ROSA to allow for a snapshot economic comparison of different elements operating in the same system under the same operating parameters.

While RO system modeling software historically provides a snapshot comparison of the performance parameters such as feed pressure and permeate quality, EVA provides an added dimension allowing the system designer to also evaluate the impact of product selection on the lifetime operational cost of the system.

There are a significant number of cost factors outside of RO element selection; EVA is a comparison tool only and is not a guarantee of actual capital or operating costs.

January 20110 82

ROSA – Cost Analysis

January 20110 83



3. Example

January 20110 84

Example - Data for projectionIONS Concentration [ppm]

Barium 0.14

Boron 0.153

Zinc 0.006

Fluoride 0.5

Chloride 34.29

Calcium 9.55

Potassium 0.97

Magnesium 7.2

Manganese 0.002

Sodium 328

Nitrate 2.6

Aluminium 0.001

Iron 0.0121

Sulphate 15.8

Carbonate 0.22

Bicarbonate 871

Silica 15

CO2 363.3

Strontium 10

1. Water analysis 2. Feed: • Well water• pre-filtered to 3μm• TDS=1290 ppm

3. Permeate Flow: • 92.89 m3/h

4. Recovery: 87%

5. Temperature: 16 and 20ºC

6. Permeate quality: • TDS < 50 ppm

7. Focus on OPEX

January 20110 85

Example - Membrane Element Selection

According to:

i. System capacity: permeate flow 92.89m3/h, than for flows > 2.3 m3/h the element diameter should be 8.0”

ii. Feed water TDS: TDS=1290 ppm very close to 1000 ppm,

then we can try LE membrane element or in case the permeate quality is not met try BW30

iii. Feed water fouling potential: well water, conventional pre-treatment, doesn’t have high biological fouling potential

iv. Required product water quality: conductivity <100 μS/cm we should meet the quality with LE

v. Energy requirements: LE has lower energy requirements, than BW30 – we should choose LE

January 20110 86

Example - ROSA - Introduction of known data

In our example we have Brackish water, therefore we choose 0.95

In our example:

Permeate Flow 92.89 m3/h Recovery 87%

• Worst scenario in terms of salt passage and hydraulics of the system (High Temperature + High Flow Factor):

January 20110 87

Example - Configuration SelectionWe should choose two stage system – since high recovery is required

January 20110 88


January 20110 89


Designs of systems in excess of the guidelines

results in a warning on the ROSA Report.

January 20110 90

By adding some back pressure, the first stage will produce less.

Example - ROSA permeate flow balancing

Back pressure valve

De-select the ¨Same back pressure¨ icon

Introduce the Back pressure value in the Back Pressure box

January 20110 91


No design warnings

Water quality with TDS <50 ppm

Back Pressure is added to the Feed Pressure

January 20110 92

Thank you for your attention!For more information please visit our web site

or contact your local Dow representative.

http://www.dowwaterandprocess.com/

This presentation is provided in good faith. Dow assumes no obligation or liability.

rosa introduction for water treatment plant

Engineering