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Floating lake system and methods of treating water within a floating lake

  • US 9,920,498 B2
  • Filed: 11/03/2014
  • Issued: 03/20/2018
  • Est. Priority Date: 11/05/2013
  • Status: Active Grant
First Claim
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1. A method for treatment of water in a floating lake for recreational purposes, wherein the floating lake is installed within a water body selected from an ocean, river, lake, reservoir, lagoon, pond, canal, estuary, stream, ocean bay, river bay, dam, pond, harbor, and bay, the floating lake having a surface area larger than 5,000 m2 and including walls and a bottom, and wherein the bottom of the floating lake is constructed of a flexible material having a Young'"'"'s modulus of up to 20 GPa, wherein the method comprises:

  • a. applying an oxidant to the water in the floating lake to maintain an ORP level of at least 550 mV for a minimum of about 10 to about 20 hours within a 52-hour cycle;

    b. applying a flocculant to the water in the floating lake before the turbidity of the water in the floating lake exceeds 5 NTU;

    c. activating operation of one or more mobile suctioning devices before a black color component of the bottom of the floating lake exceeds 30% on a CMYK scale, wherein the CMYK scale denotes a Cyan, Magenta, Yellow, and Black color scale, wherein the one or more mobile suctioning devices suctions a portion of the water from the bottom of the floating lake containing settled solids;

    d. filtering the water suctioned by the one or more mobile suctioning devices and returning the filtered water to the floating lake, thereby providing for removal of settled solids from the water in the floating lake without filtering the total volume of water in the floating lake; and

    e. supplying replacement water to the floating lake to maintain a positive pressure against an inner surface of the walls and bottom of the floating lake, wherein the positive pressure is at least 20 Newtons per square meter of a surface area of the floating lake, wherein the replacement water has a true color of up to 35 Pt—

    Co and less than 2,000 CFU/ml of bacterial count, wherein the positive pressure is maintained for at least 50% of the time within 7-day intervals, and wherein the replacement water is supplied to the floating lake at a replacement rate according to the following equation;


    Floating Lake Replacement Rate≥

    Floating Lake Evaporation Rate+Floating Lake Cleaning Rate+Floating Lake Leakage Rate.

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