Design of the Lamella Gravity Separator

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We are interested in designing a lamella gravity separator for removing silt load from the canal/runoff water.

The typical discharge values vary between 20 - 40 litres per second.

Please suggest the appropriate dimensions for the filter.

Also, please suggest the reading material for the design of lamella filters. 

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8 Answers

  1. Hi,

    Would you want to modify an existing on the market filter, or are you looking to an engineer to design for you a new one? Then What are the terms of the contract ?

    Ammar AL Khani

    PhD., MSc. Chemical eng., DEA., Automation eng.

    amarkhani@hotmail.com

     

  2. I will not design it for you, but if you so desire, you could base it in the principle of an older type cream separator where raw milk is directed into the centre of the separator and various grades of cream can be collected from outside the centrifuge.  I am Lippy.  Hear me roar.

     

  3. 40 l/s corresponds to 144 m3/h. With a surface load of 0.7 m/h you will need a total sedimentation area of 206 m2, but since the lamella only occupies 10 % of this area your net surface for the lamella separator would be only about 21 m2!

  4. Ken Martin's is correct

  5. Ignore what Guy McGowen said.  He is just advertising a unit not suitable or fit for the task you outlined. 

    Lamella clarifiers are common for surface water silt removal and other industrial water clarification needs (in process and wastewater) and are not intended for disinfection.  The sizing of lamella-type depends on the silt load and you did not note that.  However, in general, you can size Lamella-type clarifier to about 160 liter per minute per sq meter (4 gpm/sq.ft.) .   Thus, about 15 sq meters.  Actual width and length (and height) will very by manufacturer.  Parkson is the industry leader in these.

    Proper use of coagulants and flocculants is critical to success.  Following this with media filter is typically recommended to address floc carryover.

    Good luck.

  7. Hi 

    Please send more details on below email - info@wyunasep.com

    we can provide you very compact Hydrocycone system which can help you remove sand and silt from your canal water.

    you need to have a pump capacity of 144 m3/hr which is equal to 40 ltr/second.

    this way whole unit will fit into max 3m2 area.

    Share me your email, so that I can send you our product brochure for the same.

    regards

    sachin

    +919879011436

  8. Samanpreet

    I can assist with the design of Lamella gravity separators.  Its not as simple as an equation and or discussion that can be written in the limitations of this forum.

    For example, the design is dependent on many parameters, technical, economic, geographical and political.

    I am happy to provide an initial free of charge consultancy but require considerable more information from you.

    Please message directly via info@slswaterfilters.com.au

    kind regards

    Stewart Shipard