Media filtration for 100 ppm TSS

Hi all

Can anyone give me reference(s) to actual operating cases wherein seawater upto 50 or 100 ppm TSS is filtered through a single or dual media filter.  The reference can be of pressure type or gravity type filter.  One of my client's engineer is asking for a single stage media filter capable of treating worst case of 100 ppm influent TSS.  This is a highly unlikely situation to occur. But I would even appreciate references to filters handling 20 to 30 ppm influent TSS and given SDI15 less than 4.

Regards

Anvar Mansuri

2 Answers

1. Best method is Multigrade sand filter,  it may be Horizontal pressure sand filter or gravity sand filter.

   Regards

   Shivendra

   shivendra280@yahoo.co.in 

2. Hello Anvar,

   It is not conservative to consider dual or single media filter as the first pretreatment stage for sea water source containing 100 ppm suspended solids. A flocculation/clarification stage is recommended on upstream. If the source is potential to be attacked be algae bloom, DAF system is needed after coagulation. However, a jar test is recommended before design stage. If the size of plant is large, considering a pilot study is reasonable.

   I hope it can help you.