Process to maintain large clean recreational water bodies

A process to implement and maintain large water bodies for recreational use, including lakes and artificial lagoons with desirable color, transparency and cleanness properties, wherein the process comprises:

• (a) providing a structure with skimmers able to contain a large water body;
• (b) feeding the structure of step (a) with inlet water having iron and manganese levels lower than 1.5 ppm and turbidity lower than 5 NTU;
• (c) measuring water pH wherein the pH is maintained no lower than 5 and no higher than 9;
• (d) adding an oxidizing agent to the water body contained in the structure of step (a), to maintain an oxidation-reduction potential (ORP) of about 600 mV in the water body using a pulse of at least 4 hours in a 48-hour cycle;
• (e) adding a flocculating agent in concentrations within 0.02 and 1 ppm over a time period no greater than 6 days to precipitate impurities in the water to the bottom of the structure of step (a);
• (f) cleaning the bottom of the structure of step (a) by moving a suction device over the bottom, whereby precipitated impurities and additional flocculants are collected by the suction device;
• and
• (g) generating a displacement of surface water containing impurities and surface oils by means of injecting inlet water according to step (b) and removing the displaced surface water using the skimmers provided in the structure of step (a), which together with step (f) eliminates filtration of the whole water body.

A process to implement and maintain water bodies larger than 15,000 m3 for recreational use, including lakes and artificial lagoons with desirable color, transparency and cleanness properties, wherein the process comprises:

• (a) providing a structure with skimmers able to contain a water body larger than 15,000 m3;
• (b) feeding the structure of step (a) with inlet water having iron and manganese levels lower than 1.5 ppm and turbidity lower than 5 NTU;
• (c) measuring water pH wherein the pH is maintained no lower than 5 and no higher than 9;
• (d) adding an oxidizing agent to the water body contained in the structure of step (a), to maintain an oxidation-reduction potential (ORP) of about 600 mV in the water body using a pulse of at least 4 hours within a cycle of predetermined duration;
• (e) adding a flocculating agent in concentrations within 0.02 and 1 ppm over a time period no greater than 6 days to precipitate impurities in the water to the bottom of the structure of step (a);
• (f) cleaning the bottom of the structure of step (a) with a movable suction device to remove the precipitated impurities from the bottom of the structure, together with the additional flocculants;
• and
• (g) generating a displacement of surface water containing impurities and surface oils by means of injection of inlet water according to step (b), which generates the displacement in such as way to remove the surface water using the skimmers provided in the structure of step (a), which together with step (f) replaces filtration to remove suspended debris from the whole water body.