Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

WATER TREATMENT

CHAPTER 3
by

rosidah kamaruddin

on 12 December 2012

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of WATER TREATMENT

WATER TREATMENT CHAPTER 3 Looking at water, you might think that it's the most simple thing around.
Pure water is colorless, odorless, and tasteless.
But it's not at all simple and plain and it is vital for all life on Earth.
Where there is water there is life, and where water is scarce, life has to struggle or just "throw in the towel."
Water is of major importance to all living things.
Up to 60 percent of the human body is Water.
Therefore the quality of Water we drink is very important.
The Drinking Water should be totally clean, pure and free of any disease causing MICROBES, and that’s why it should be properly Treated and DISINFECTED before using it for drinking purpose WATER INTAKE The litter and floating material in the river water usually be arrested and stick on the screen.
   To prevent debris from entering  raw water pump. SCREEN SAND EJECTOR It used to throw sand in the water so that sand does not enter the raw water pump This pump is used to deliver water to Water Treatment Plant for processing into clean water raw water intake will enter through the inlet tank and lime are dosed here The first treatment process occurs in the `Aerator" that touched the raw water directly to the air for the release of gases or volatile toxic substances in water such as carbon dioxide and hydrogen sulfide. Dissolved iron oxidation also occurs here. AERATOR WATER INTAKE STORAGE DISINFECTION FILTRATION SEDIMENTATION COAGULATION water quality standard This factor becomes important if the plant site is located in
the city or in areas that have been or are being developed.
Location must take into account the current and future needs, direction and rate of growth in the supply and the possibility of deterioration in the quality of water sources in the future.
Location of plant must be adapted to changing circumstances and environmental and land use around the area.
Usually, plant location planning should be referred to the structure plan / local and should be discussed with local government agencies and the Department of Environment. Planning & environmental obstruction factors
The space requirements during the construction, enlargement, operational and environmental requirements is an essential element in the design. Preliminary studies to be made involves the following matters: -

plant requirements; the current and future
treatment processes involved
store chemicals wet / dry, including truck routes
wastewater disposal area
sludge disposal area
raw water reservoirs and water
area of the raw water pump house and water
whether the power supply from the local electricity or diesel generators, including fuel storage and fuel supply
the entry of plants, whether near or far with treatment plant
quarters for workers, whether organized or not. Plant design factor EIA (Environment Impact Assessment) or
Environmental Impact Assessment should be conducted to evaluate the effects of the treatment plant to the surrounding area or otherwise. Among the effects found are: - a. effects of noise when operating plant (pumps, generators, trucks, chemicals) b. effects of noise and dust during construction, and if lime is stored in Silos or tower of lime. c. Danger of leakage of chlorine (either in the plant or during delivery) d. The smell of chemicals and sludge e. The effect of the dumping of sludge and waste water washing on the canal or lake. Environmental factor In a flocculation tank, the water is stirred or otherwise moved around so that the particles move around,
bump into other particles, and stick to one another.
Eventually the small and difficult to remove particles in the water form large clumps which can then be easily removed.
Chemicals (most commonly "alum") are often added to the water going into a flocculation tank to help aid particle formation.
Flocculation tanks are used to mix polymer and sludge prior to sludge thickening or dewatering.
Flocculation tanks are supplied with variable speed agitators, but the speed is very rarely changed during normal operation.
Floc tanks generally have an open top, which allows operators to easily visually observe floc conditions.
In applications where odors or harmful gases can be present, floc tanks are supplied with a cover. FLOCCULATION TANK Sedimentation tanks can be of different shapes, often rectangular or circular. They are sized in order to have an optimal sedimentation speed. If sedimentation speed is too high, most particles will not have sufficient time to settle, and will be carried with the treated water. If the speed is too low, the tanks will be of an excessive size. SEDIMENTATION TANK Filtration is the passage of water through some type of
porous medium to remove undesirable suspended solids.
This filtration can be accomplished by gravity flow or pressure.
The media used for filtration are selected
for the specific contaminants that are to be removed.
The most common media used in filters are natural silica sand, anthracite coal, and granular activated carbon.
Naturally occurring manganese greensand sometimes is used in combination with potassium permanganate to remove iron and manganese from groundwater supplies.
The shape, size, and depth of the media bed in the filter are adjusted to obtain the desired flow rate and effective porosity.
Materials collected by the filter must be removed regularly by backwashing (reversing the flow through the filter to lift out the accumulated contaminants and suspended solids).
Because this backwash may contain very high concentrations of potentially dangerous contaminants and biological material, new federal regulations require careful monitoring and control when filtration is used. FILTRATION TANK
Water treatment transforms raw surface and
groundwater into safe drinking water.

Water treatment involves two major processes:
physical removal of solids and chemical disinfection. The space requirements during the construction, enlargement, operational and environmental requirements is an essential element in the design. Preliminary studies to be made involves the following matters: -

plant requirements; the current and future
treatment processes involved
store chemicals wet / dry, including truck routes
wastewater disposal area
sludge disposal area
raw water reservoirs and water
area of the raw water pump house and water
whether the power supply from the local electricity or diesel generators, including fuel storage and fuel supply
the entry of plants, whether near or far with treatment plant
quarters for workers, whether organized or not.
Plant design factor
Full transcript