Dear Abesh,
Before passing the muddy water through a membrane or adsorbent, the following cleaning procedures should be conducted:
1-Treatment with Aluminium Sulfate
Aluminium Sulfate, Shortly known as Alum, when added to raw water reacts with the bicarbonate alkalinities present in water and forms a gelatinous precipitate. This floc attracts other fine particles and suspended material in raw water, and settles down at the bottom of the container. The water over this sediment is almost clean other than some fine particles dissolved in it.
Alum is in a crystallized form which you can powder and store in a clean glass container.
OR
2-Treatment with Bleaching Powder Solution
Bleaching powder or chlorinated lime is used to disinfect the water from bacteria. The chlorine present in the bleaching powder solution kills almost 90% of the bacteria present in water.
Bleaching powder also known as Calcium hypochlorite is in a powdered form. Add one or two teaspoons of the powder in a glass bottle, add water and mix well. Use a metal cap for the container as it may corrode plastic cap.
Both Alum and Bleaching powder are commonly available in most of the grocery stores.
Once the cleaning step is completed, the water can be passed through activated carbon, clay, zeolite or sand filters or combinations of two adsorbents..
All the above mentioned adsorbents are cheap and it is easy to be packed in columns with the desired dimensions.
For more on muddy waters, please use the following link:
http://www.instructables.com/id/How-to-Purify-Muddy-Water/
https://www.quora.com/What-method-is-best-for-separating-clean-water-from-muddy-water
Hoping this will be helpful,
Rafik
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