Water pre-treatment plants are usually foreseen for suspended solids removal (TSS). Idroconsulting experience includes:
The removal of coarse suspended solids by sedimentation is the first step of raw water pre-treatment.
The separation is performed trough clarifiers/clariflocculators or trough lamella clarifiers, when only limited space is available.
Filtration consists in the removal of fine suspended solids trough mechanical action. This treatment can guarantee the removal of TSS with a dimension ≥ 25 µm.
Idroconsulting can supply a wide variety of filtration unit as sand filters, multi-media filters, gravity and valveless filters and more.
The removal of ultrafine suspended solids by ultrafiltration membranes allows the separation of particle with dimension up to 0,005 µm. Suspended solids and solutes of high molecular weight are retained in the so-called retentate, while filtered water pass through the membrane in the permeate.
SEDIMENTATION
Lamellar Clarifiers provided for the Ribatejo power plant in Portugal.
Clariflocculation Basin with a capacity of 1250 m3/h provided for the Egyptian Petrochemical Complex in Egypt.
FILTRATION
Make up water sand filters provided for Engro Fertilizers Complex in Pakistan, pressure horizontal type with a total capacity of 1800 m3/h.
Side stream filters provided for Engro Fertilizers Complex in Pakistan, self washing type with a total capacity of 700 m3/h.
ULTRAFILTRATION
The ultrafiltration membranes allow the removal of ultrafine suspended solids which are not removable with traditional mechanical filters. Moreover, they allow the removal of particular compounds such colloidal silica, which cannot be removed by ion exchange and is particularly dangerous for reverse osmosis membranes.
UF ceramic membranes allow the removal of emulsified oil.
Ultrafiltration skid provided for the Tengiz Oil Field in Kazakhstan, as pre-treatment for a demineralisation package, with a produced flowrate of 98 m3/h.