Water intake at the treatment plant can come from a number of different sources. Surface waters come from rivers, lakes and reservoirs, which may have a wide range of chemistry with high mineral and metal contents, chloride levels and particulates. Ground waters taken from underground springs, water tables and wells are low in oxygen or fully de-aerated with varying amounts of hydrogen sulphides and sulphate reducing bacteria.
The objective of water treatment is to produce safe and potable drinking water. Generally to treat surface water (e.g. river water, lake water and well water) the treatment process consists of Coagulant Dosing, Mixing, Flocculant-Aid Dosing, Flocculation, Sedimentation, Filtration and Disinfection before distribution as drinking waters.
The main goals of such package units are removing suspended solids, turbidity and pollution from the available raw water in each area, providing a treated water quality based on WHO, European or national standards. The applied design criteria and the components of a water treatment plant depend on the turbidity and pollution of a known raw water source.
System is included from following stages of treatment:
- Pre-sedimentation tank, which is used for turbidity > 100 NTU
- Flash mixing & flocculation compartments, equipped with mechanical mixers.
- Sedimentation packages in combination with sludge recirculating facilities for minimising the chemical consumption.
- Filtration units, based on quality of the available raw water will be design as Gravity or pressurised filters.
- Disinfection units, a pre-disinfection in combination with a post-disinfection.
In case of other raw water pollutants e.g. Ammonia, Iron, Manganese, Arsenic, Colour, Odour, dissolved Gases etc, either additional compartments in connection to the main plant can be used or we supply a separate plant to remove any specific problem.
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