In the video it is correct that water and air help clean the sand, but there is a multiple step process. First it is air by itself, then air and a little water flow, and then air is usually shut off when there is more water flow. If air and a big flow were used in the backwash then too much of the sand would be taken with it and thrown away. It's better that the sand be kept and used over and over.

Interesting backwash process in WWT. really satisfying to see the basin from dirty to clear that the lights reflect!

Thank you for the video. It is important to note that each of us will be able to maintain water quality by this method among the industry -FTI UJ

Ilham Andreansyah - FTI UJ Thank you very much for the explanation, on this occasion I learned a lot in this video about step by step the backwash process for water filters. Backwash is important for maintaning the quality of process.

thanks for sharing this content. shown step by step the backwash process for water filters, so it can be easily understood

Thank you for making this video i never seen before backwash process for water filter. Keep educating people it's very interesting

Thank you for the information. Back wash process for water filter. Thinks a short time but produces water that is quite clear.

Thanks so much for sharing ,! The video is very clear and the steps filmed very nicely

Thank you so much brother for making this video and educating people!

I like the video cuz explained bout backwash water treatment process with visuality

Thanks for this video, it show about back wash water fillter by sand

this is really helpful. thank you for making this!

great process.. backwash is important for maintaining the quality of the process

thank you for share this video. very satisfied with the water result

Thank you,this Vidio is very useful for people

Thankyou for the information, keep inspiring

Thanks a lot mate 👍

thank you so much, this video very helpful.

Too many sand and effort if we use for small quantity water cleaning, if asked to choose, i prefer make many layer of sand and rock and then run dirtywater pass into sand and rock

very satisfying to see hehehe

Super 👍🤓😲

For how much souls is this plant design.?

@briantrumpower8108

2 жыл бұрын

Three. Three souls. But they liked dirty water.

Bông bùn đẹp qá ạ.

@henrycash143

3 жыл бұрын

Bạn có biết tiếng Anh không?

what are the filters made of?

@Mark-ot4ub

4 жыл бұрын

Usually it's a sand put through screens to make a certain grain size. But sometimes granulated carbon is used instead of sand, or maybe a combination. The backwash makes the heavier material (sand) go to the bottom layer and the carbon would be the upper layers.

Effective vedio

Where does the backwash water go? Is it re-treated?

@hachvietnam

2 жыл бұрын

The backwash water goes to gravity thickener for being treated as sludge

@andrey6125

2 жыл бұрын

@@hachvietnam thank you!

What is the size of stone ?

rapid sand filter filter nozzle manufacturer. You can visit our website for more information.

How much the volume for one filter?

@Mark-ot4ub

4 жыл бұрын

Thousands, maybe 10 thousand for that one filter, but usually the one shown in the video is one of a string of filters, maybe 5 or six. The filtered water can also be estimated by the surface area. But the backwash uses about 5 - 10% of the water filtered. We can't tell from the video.

capacity of this plant? how much MLD?

@nhinho902007

5 жыл бұрын

100000m3/d and 6 sand filters

@Mark-ot4ub

4 жыл бұрын

This is a "rapid sand filter" that uses chemicals to group together the dirt in the water, then it clings to the sand until the cleaning you saw in the video. It has lots of pumps, chemicals, energy, valves, and needs to be operated by trained technicians. There's another kind called "slow sand filtration" that is much slower to filter, takes more space, but does not required chemicals and is easy to use. This kind can be used in a house or for a village or even a city if there is space for it. Slow sand filtration uses a biological film over the sand that does the work. It was used in Europe in the late 1800's and then world wide, and is still in use, but for large cities it takes too much space and is too slow.