Presented By:

LOKESH SAINI

MTech. II'nd Year

Environment Engineering

Student ID 2015PCE5271

Guided By:

Prof. A. B. Gupta

Department of Civil

MNIT, Jaipur

Performance Study of Community based Reverse Osmosis

Plants for drinking water

A

Thesis Presentation In partial fulfillment of the Requirements

for the Degree Of Master of Technology

DEPARTMENT OF CIVIL ENGINEERING

MALAVIYA NATIONAL INSTITUTE OF TECHNOLOGY JAIPUR

JLN Marg, JAIPUR-302017 (RAJASTHAN), INDIA

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Scope of Work

I’st Half of Project Work•8 Plants of Capacity 1000l/hr located in Jaipur.

•4” membranes, 4”x40”

II’nd Half of Project Work

•8(Jaipur-1000l/hr) + 13(Barmer >1000 & 3000l/hr)

•8” membranes, 8”x40” are used in 3000l/hr

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Raw

Waste0

1000

2000

3000

4000

5000

6000

Raw

Filter

Waste

Avg. Parameters at Kalwara

Raw

Waste0

500

1000

1500

2000

2500

3000

3500

4000

Raw

Filter

Waste

Avg. Parameters at Vidhani

•Results: At Vidhani

•TDS removal 94.5% (‘η’ range-94.0% to 94.8%)

•Divalent ion & Hardness(Ca &Mg), removal=95%

• (Cl¯), removal =91 %

•F¯,NOз¯ removal=98%

Results: At Kalwara

•TDS removal 93.88%(‘η’ range-93% to 94%)

•Divalent ion & Hardness(Ca &Mg), removal=95%

• (Cl¯), removal=92%

•F¯,NOз¯ removal=98%

mg

/lt

mg

/lt

Flash Back

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0

1000

2000

3000

4000

5000

Ju

n-1

6

Ju

l-1

6

Au

g-1

6

Sep

-16

Oct-

16

Vidhani Raw

Vidhani Filter

Vidhani ROC

0

1000

2000

3000

4000

5000

6000

7000

Ju

n-1

6

Ju

l-1

6

Au

g-1

6

Sep

-16

Oct-

16

Kalwara Raw

Kalwara Filter

Kalwara ROC

Results: At Vidhani

•There is effect of monsoon on G.W quality.

•Avg. Salt Rejection=94.5%

•ROC salt is higher by 90.7% to feed water

TDS vs time at Vidhani

TDS vs time at Kalwara

Results: At Kalwara

•There is effect of monsoon on G.W. quality

•Avg. Salt Rejection=92.2%

•ROC salt is higher by 36.6% to feed water

** Salt concentration in GW increased

because operator discharged ROC into an

abandoned tube well in the campus itself.

**m

g/lt

mg

/lt

DrawlDisposal

TD

ST

DS

Flash Back

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Trend line for CIP* cycle

16.05.15 to 19.05.1619.05.16 to contd….

Results •In consequent CIPcycle KWh/Kl reducedby 12%(approx.)•Due to fouling SPCincrease by 12.9%.•P1 and P2 are due toweather effect (rainyand winter season).•D1 & D2 are due tohigh weathertemperature.

Fig- Trend of KWh/Kl (SPC) with time at Vidhani

Secondary Data for CIP Cycle-1

Primary Data for CIP Cycle-2

CIP*=clean in place

2

2.2

2.4

2.6

2.8

3

3.2

3.4

Jul-16 Aug-16 Sep-16 Oct-16 Feb-17 Mar-17 Apr-17 May-17

Jul-15 Aug-15 Sep-15 Oct-15 Feb-16 Mar-16 Apr-16 May-16

SP

C

Time

D2

P1

P2

D1

D2

P1

P2

D1

μ 2 = 2.32

σ2 = 0.18

‘SPC’ min-2.0max-2.56

μ1 = 2.52

σ1 = 0.339

‘SPC’ min-2.03max-3.18

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Case Study Barmer•Introduction330 RO units, Capacity 1000 &3000lt/hr

capacity are installed by Cairns India in

Barmer under CSR.

TDS varies between 1500-10000mg/lt.

•Objective

Performance study & collection of data for community size RO

Units.

•Methodology

Collected water samples of 13 plants from Barmer, Dhorimanna,

Pachpadra, Baytu & Shiv blocks.

Questionnaire Survey.

Collected their data e.g. log book, their testing reports,

cleaning manual & photographs (Secondary data).

Collected Noise Data.6/16

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2/3

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Observations•Oversize plants, capacity underutilized.

•Plants are well maintained & dry pits

are made for brine.

•Use of antiscalant has effectively

delayed fouling.

•Records are not uniformly and regularly

maintained.

•Good water dispensing mechanism.

Conclusion

•Wastage of money for oversize.

•Canal water is to be supplied by PHED,

So no need of RO.

•Training to operator and supervisory

staff is required.

•KPI (Key performance indicator) of

plant is to be regularly monitored to

judge the health of plant.10/16

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Life Cycle ROC & chemical discharge generation (30yrs life)

•Assumption:- 60% recovery in Jaipur based Plants and 50 % recovery in Barmer Plants

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Life Cycle Solid waste generation (30yrs life)

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Typical assessment of emissions in Kg in life cycle

(Lior 2017), (RALUY et al. 2006)

Results & Discussion

•Ground water quality improves during rainy season due to recharging.

• “%” Rejection of multivalent ions is more comparative to mono-valent

ions.

•F ‾ ion removal is good due to sufficient Ca & Mg Hardness is available

in GW, which binds with F ‾.

•SPC is inversely proportional to ambient temperature.

•After each chemical wash of membrane, about1.5-1.75% reduction in

salt rejection due to increase in pore size of membrane is observed.

38% reduction in RO reject flow outlet just after the wash.

13% reduction in SPC after each chemical wash

Membrane pores converting towards nano filtration sizes.

•SPC(G.W. Withdrawl >2.5KWH/kl) & SPC(Plant operational > 2.5(TDS-

2000mg/l) to 3.2 KWH/kl(TDS-4000mg/l).

•Noise level is 74dB(A) (1000l/m³ at 1m) & 84dB(A) (3000l/m³ at 1m).

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Offshoots for future work of Project

1. Developing relation between SPC vs TDS of feed.

2. Fouling Characterization.

3. Cleaning Customization.

4. Optimization of antiscalant use.

5. Utilization of high ambient temperature for feed

water.

6. Solid waste disposal mechanism.

7. Life cycle cost assessment.8. Life cycle impact assessment.

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Acknowledgement

1. Mr. Ashok Tambi, Assistant Manager, M/S Bosh India Ltd, Jaipur (Vidhani Plant,

Jaipur).

2. Mr. Bharat Jain, Director, M/S Dowec India Ltd, Bangalore (Kalwara Plant,

Jaipur)

3. Mr. Shaswat Kulshrestra, M/S Cairens India, Barmer

4. Mr Sitaram, Operator, Vidhani Plant.

5. Mr Rakesh, Operator, Kalwara Plant.

6. Mr Sadique Ansari, Technician, PHE Lab, MNIT, Jaipur

Thanks