 | How to solve drinking water crisis in Dhaka city.
19 March, 2011
Solving Problem for potable water in Dhaka city.
Bangladesh is one of the most densely populated countries in the world with 120 million people living in an area of 144 thousand square kilometer only. This results in huge demand for supply water.
The drinking water deficiency causes great threat to our major population. To meet up this drinking water deficiency the production of drinking water should be boosted up in the country to a great extent. Otherwise the entire national population may suffer for drinking water
The population of the Dhaka Metropolitan city about 66 million in the year of 2010 and the demand for the water supply is more then 3000 MLD. In 2011 population is expected to be 68 million with a demand of about 3500MLD. In 2015 the population is expected to be 70 million with a demand of 4000 MLD. And in 2020 the same is expected to be 75 million with the demand of 4500MLD (Due to area increasing).
Now a day WASA is taking raw water for sayedabad project from 12 Km long way of Sitalakha River. In the water of Sitalakha, chemical contamination and pollution is very high. For the industrial developments and due to increasing population day by day it will be increased.
It is very clear from the recent observation that almost all the wastewater from Dhaka city and also due to industrial development almost all the chemical wastewater is dumping in the same river. As we are not so much conscious about environmental issues most of the industrial wastewater is dumped in the Sitalakha River. So it's very dream that we would be able to create awareness among the people and also the industrial developer to prevent further dumping of wastewater.
We proposed to take raw water from steam power station as a by-product. In the steam turbine they are using bulk of cooling water in the system. It can collect without cost as a result we can serve the people with low cost supply water and can solve our drinking water deficiency
We proposed to build a new water supply plant near 450 MW Meghna power stations. Because, we can take raw water from cooling discharge of Meghna power station and Sumit power ltd without any investment. The quantity of the cooling water discharge is near about 1,200MLD for one power station. It is same as our present demand. Soon it will came double & near future Government have plane to build a new 4Nos. same capacity plant in the same place. So gradually we can get more then 4,800 MLD supply water from the same place. Witch is more then calculated demand up to 2020.
Land development facility, port facility, communication facility, roads, and power supply facility and waste management low land is available in the proposed area. In the existing system have Sub-station, chlorination plant, intake, cores bar filter. Bend screen filter with their washing and related electrical operating system. For making new power station near 450 MW power plant in Meghna. The cooling water discharge line will be diverted to our proposed channel it is one of the benefit for the system. We can make clarifier and filter bed in the same place.
For better reliability of drinking water for all over the Bangladesh wants to make a ring balance system same as BPDB electric grid. Name as national water transmission line. In this system all the supply water will be connected with each other. If any of them will be out of order it will not hamper the entire system and by this system water production machine maintenance facility will be balanced.
Goal for the WASA should to provide clean & fresh low cost drinking water for city people as well as for the rural aria those who are not getting the facility
WASA Saydabad project production is only 225 MLD and other all water is producing from deep tube well. Now the water level of the ground is very down in Dhaka city. To collect under ground water is very difficult and expensive but maximum production coming from deep tube well. Due to high consumption of ground water, underground water reserve level is decreasing in Dhaka city. (In some places it is now more than 250 feet from normal level.). Experts are telling to stop it; otherwise the city will face a great collapse.
If we can provide sufficient water supply then no need to involve any cost for deep tube well. We can save 50 MW Power from deep tube well and from suction pump because most of the people are using suction pump for taking water from the line due to shortage of water.
We can save 50MW power. We are getting available supply water it is the great achievement for the Nation and for saving money WASA can make as a profitable organization.
The water quantity of flow in Meghna River is 10 times greater than Sitalakha river and as per water analysis report this river water is more pure than sitalakha river as the contamination due to human and industrial waste is almost nil in Meghna river.
Now WASA also thinking about this issue and Project consultancy work is in progress.
If we consider a water ring system in our country we can connect it with Narayongonj WASA. After the Kachpur Bridge we can take another line up to Gazipur and the main line we can bring it up to Dhaka and connected with all other source.
Which water line will go to the Gazipur in the same time we can make a city flood protection bridge and communication road up to Gazipur via purbachal near the pipeline it will be financially benefit for the country?
It is highly declared that the way of proposed transmission line beside Dhaka Chittagong highway is now a cannel and it is a government land and empty place. No body will affected and no need to take any land requisition for that.
To build the project it does require less money but production is higher.
Less running & chemical cost &Very better future for extension.
Other than that, Govt. given order to sumit power for 450 MW duel Fuel Power Station. Govt. can do the water project by the Sumit power for their social responsibility. Existing Cooling discharge line modification time can make clarifier and filter unit it's another advantage. Hope Govt. related person realize the matter and can do some thing better for the country.
Thanks.
Masud
Maintenance Engineer.
Meghnaghatpower Power Limited
Mobile: 01717050598
e-mail:mtechbd@yahoo.com
Release link:http://www.dwasa.org.bd/
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