A Report

On

“Water treatment plant visit”

Organized by:

Civil Engineering Department

Co-ordinator:

Prof. H.M.BHIMAJIANI

Date: 7th FEBRUARY 2015 Time: 9:30 a.m. to 01:30 p.m. Venue: Water treatment plant, Jetpur

CONTENT

1. Acknowledgement 3

2. Information 4

3. Purpose of Visit 5

4. What we learn? 6

5. Conclusion 14

ACKNOWLEDGEMENT

We are gladly & thankful to Director as well as

Principal Dr. H. M. Nimbark and Head of the Departments Prof.

H. H. Gajera and our faculties who gave us a great guidance

regarding training and instructed us the importance of training in

civil field. So we decided to take visit in water treatment plant

which is situated in jetpur.

We are especially thankful to Mr. Gondaliya, the in charge

officer of water treatment plant because he granted us permission

for taking visit at treatment plant and gave the proper guidance to

students and allow to visit for the practical based approach

learning to students.

GENERAL INFORMATION

Jetpur Dyeing and Printing Association have set up a Common Effluent

Treatment Plant [CETP] at their location in Jetpur, Gujarat, India. The

association has set up a common effluent treatment plant to treat the

effluent arising from around 200 washing Ghats. The CETP consisting of

physico-chemical treatment is designed and commissioned by CA to treat

2000 cu.m/day of effluent with inlet BOD 180 mg/L. The total cost of

these textile industries project was Rs. 3 Millions and the plant was

successfully commissioned in 1991 to give treated effluent BOD < 100

mg/L.

PURPOSE OF VISIT

Our main purpose for this visit is to be familiar with industrial

environment and to get practical knowledge of water treatment

plant components.

Also in 6th semester subject like water and waste water

engineering requires knowledge about how polluted water is being

treated, so it is very much convenient to see all the practical and

components in real time work environment.

WHAT WE LEARN?

On 7th February, 2015 (Saturday) at 09:30 a.m. we reached at

common effluent treatment plant at jetpur. The visit started from

the initial tank where the waste water of city and industries is

collected. Then that flow is collected from the inlet pipe and

removes the larger solid inorganic material such as paper, plastic,

etc. by the rotating chamber.

Mr. Gondaliya, the incharge officer of water treatment plant

guided all the students about the entire process of water treatment

plant.

First unit of water treatment plant is screening Mr. Gondaliya the

incharge officer of water treatment plant provide basic information

about screening process of waste water treatment plant.

The collected waste water is transported to Preliminary treatment

chamber; wastewater is then passed through a primary

sedimentation tank where solid particles of organic material are

removed from the suspension by gravity settling. The resultant

settled primary sludge is raked to the centre of the tank where it is

concentrated and pumped away for further treatment.

The next step of the treatment process is secondary clarifier. The

water from the primary tank is transported to the secondary

clarifier for adding chemicals such as lime and alum to reduce the

PH of water.

The next stage is a biological process which breaks down

dissolved and suspended organic solids by using naturally

occurring micro-organisms. It is called the activated sludge

process.

The settled wastewater enters aeration tanks where air is blown

into the liquid to provide oxygen for mixing and to promote the

growth of micro-organisms. The “active biomass” uses the

oxygen and consumes organic pollutants and nutrients in the

wastewater to grow and reproduce.

Some of this sludge is recycled to the inlet of the aeration tank to

maintain the biomass, hence the name for the process – activated

sludge. The remainder is pumped to anaerobic digesters for further

treatment.

All the students were in hurry and in excitement for knowing the

next steps of water treatment. The next steps for wastewater

treatment plants use disinfection for tertiary treatment to reduce

pathogens, which are micro-organisms which can pose a risk to

human health. The sludge is passed to the sludge handling system

which contains 20% sludge and 80% water.

Now again to remove the sludge particles the water is passed

through the belt filter press.

The purified water is obtained by chemically treating the water

coming out of the belt filter press.

Mr. Gondaliya has little smile on his face by watching full of

attention of all students and then he explains the detail process of

tertiary treatment.

In which Chlorine is usually dosed into the treated wastewater

stream for disinfection. However, uses large ponds in which

sunlight and other micro-organisms reduce the pathogens.

Although the PH of water is reduced and sludge content and other

impurities are removed, still water is not obtained in purified form

as it contains the coloured water.

CONCLUSION

From this visit, we get the information and practical

knowledge about the physio-chemical treatment of waste water

and components used in treatment plant. Some test should be

performing for general discussion with experts in the industry.

About 59 students were benefited. The visit was nicely completed

with group photography at 12:00pm.

Thank you