Waste Water Treatment plant at Bhatiya

WASTE WATER TREATMENT PLANT AT BHATTIYA

On 18 the October 2007, we the students of GURU NANAK DEV ENGINEERING COLLEGE made a visit to the Waste water treatment plant at Bhattiya which is under the Sutlej Action plan in ZONE B.

We started off at 11:00 am and reached there at around 12:00. Bhattiya is a village and is situated on the outskirts of the ludhiana city it took us 1 hour to get there and we were greeted by the SDO sir over there which is also the head of that waste water plant.

He gave us quite simplified information about the wastewater treatment plant, its parts , its functioning and various processes of the plants too.

The waste water treatment plant is 86 killa in area and it consists of various other treatment process which consist of a gritter, screening units and the pipelines system, gas holders, sludge drying beds, gas flaring system, UASB reactors etc. of various processes.

It has a capacity of treating a discharge of 110 Million litres per day.
The whole of the plant is in a map which is given in the picture:

It is a model of the plant and it gives an overview of the plant in a nutshell. So it basically has three major units
1 Collection
2. Treatment

3. Disposal

Basically the water flows through the collection chamber it is first made to flow through coarse screener where the bulky materials in the wastewater are collected and taken out. Secondly, the waste water is made to pass the fine screening unit and then it is passed through the gritter then lastly the water is treated through the UASB technology and is disposed to nearby river.

The main collection of the wastewater is done through various drains and the first process of the treatment is started through the collection

The picture shows the collection of the wastewater through the drainage water system and it is collected and the first process of collection is started.

The water passing through the inlet first comes across the gates which are as shown in figure below which helps in the regulation of the discharge water coming through.

Now after the water passes through the gates t, the gates are closed for the water to be treated further. These gates are quite efficient in the regulation of the water and they help in the maintenance of the walls, which are cleaned through and maintained by the workers.

The Coarse screener

The bulk materials in the waste water like the paper bags, plastics or the leather materials which are big in size. It consists of the screener of a suitable gauge(i.e the distance between the two consecutive gauges), the screeners are cleaned through regularly and simultaneously through chain operation as the screeners are pulled upwards they are collected at the back in the back side

Its a total mechanical mechanism. The back side of the mechanical screener whcih shows the chain linkages which carries the screens and are thrown towards the outer side where the conveyer belt is placed and the material is collected at the end of the conveyer belt.

Now the finer screener comes into action where the smaller particles which are not caught by the previous screener. This is quite like the previous screen but it is quite finer and can get smaller materials through it.

Through this screener even minor materials like grits and suspended particles are also passed through it. But it is quite efficient in removing the visible bulky materials which are present in the waste water.

Now its the mechanical gritter where the water is treated ofr the small seeds and the still smaller are taken out of the waste water it is done manually or it is done mechnically the grits are basically the small seeds of tomatoes

or cucmber which in turn come into the waste water.

they are collected in the barrel but they are first treated with the mechanical gritter it is a sophisticated device where the the fine screens are placed in the path of the wastewater and they are screened in the screener adn itis considered as the highest efficient process and no particle is said to be passed through this screen as the screen is finely divided too.

The finely divided screens are held mechanically and the screens are pulled b mechanical arms once in 3minutes and theya re folded at the end and hence the materials collected are automatically given through the belt conveyer at the back of it. The grit, the finest particles are assumed to be removed and only the suspended particles or the dissovled materials are present in the water. Here after this stage all the water contains the dissolved particles only.

The dissolved particles presence in the water with the gritters are also mechanically done with a rotor which rotates one revolution in 7 minutes. The water enter through the paddles which distributes the water uniformly through all those water panels and now the water is made to pass through the rotor and the rotor rotates and takes the particles with it and they are collected at the end of teh hole and they are again pulled out in the collecting barrel through chains and hence the water is free form the grits and small particles then the screener (fine)

Now the water collected is passed through the pipelines which are agin distributed from 20 to 240 pipes and then are treated by the process of UASB process which is highly sophisticated process which involves the water to be treated with full efficiency and less time consuming. The water is bubbled out in the surface and it has a ph of about 7.0 which can be treated as the neutral one which is fit for drinking purpose but is still made to go through the sedimentation process. It may be rapid or slow filter type process, as the waer still has some muddy looks which is aestheticlly not fit for drinking, now the water is pased through the channels which are long upto 5km to 7km and deep upto 8ft deep, inthis process the water is made to flow very slowly and the water contain suspended particles and they are made to settle down in the base of the water reservoir, and the water is made to flow through the fall and is then drained upto the end and are made to flow through the river which is made to flow with the river canals nearby the very plant.