Filter Basin Rehabilitation
Maintenance work for sand filter
This rehabilitation work solves problems in filtration facilities and serves as a basic tool for realizing the supply of safe drinking water. The effect is as follows:●Reduction of burden on Environment
No more new filter media and no more industrial waste. It is hard to procure new filter media due to environmental protection in Japan.
●Cost Advantage
Achieve cost reduction to do rehabilitation work rather than media replacement. In case a large amount of filter media is needed, the bigger the purification plant, the higher the cost advantage.●Washing capacity
Propose the best media washing solutions and washing machines for different media conditions. Washed sand medial has similar capacity with Manganese.
Process
Step1. Examination : Examine filter bed and filter media and propose the best rehabilitation work
Step2. Take media out : Following the construction, take filter media out
Step3. Cleaning and Repair : Maintenance work in the filter ( wall, underdrain, surface washing pipes etc. )
Step4. Media washing : Washing and sieving according to the media condition
Step5. Restore media : Install the washed clean media to the filter bed and finally examine it
Take out media from bed
Take out media from bed
Repair underdrain
Wash empty filter basin
Install washed media again
Rehabilitation Work for Media Washing
Step1. Washing and Sieving of media : Sieving filter media to separate Anthracite, Filter sand and gravel for each
Step2. Decide washing method : Consider the best washing solution and decide proper system based on the examination result
“SIPHON WASHING System” which can exfoliate attached sludge without particle crushing.
Recycle work : ASAKA Water Purification Plant Tokyo Metropolitan