DEVICE FOR BIOLOGICAL TREATMENT OF NATURAL (INCLUDING SEA) WATER OF SEPARATE WATER AREAS FROM DOMESTIC CONTAMINANTS AND COMPOSITE MATERIAL FOR ITS PRODUCTION Russian patent published in 2024 - IPC C02F3/34 C02F3/32 

FIELD: water treatment.

SUBSTANCE: group of inventions relates to biological treatment of natural water, including sea water, water of separate water areas and reservoirs from domestic contaminants. Biological treatment device consists of volumetric modules, the number of which is determined by a calculation method depending on the degree of water contamination and the total surface area of the plate elements forming the module. Plate elements connected to each other by means of welding consist of a porous composite material based on a thermoplastic polymer (low density polyethylene) made by hot pressing and inorganic substances, which are sources of prolonged release of biogenic elements – nitrogen, phosphorus, potassium and biogenic elements that are part of the complex mineral fertilizer, necessary to ensure the vital activity of microalgae immobilized on the surface of the elements. Inorganic substances used are low-water-soluble ammonium-magnesium orthophosphate, as well as potassium dihydroorthophosphate and water-soluble substances which are part of the complex mineral fertilizer, the particles of which were subjected to surface chemical modification before being added to the initial mixture. It is shown that the biological treatment device provides for purification of 4.5 m³ of sea water contaminated with ammonium ions, per day per 1 m² of the total surface area of the plate elements at 20% exceeding the maximum permissible concentration (hereinafter – MPC) for ammonium ion (or 1.3 m³) – at 100% excess of MPC) in the event that a mixture of initial components of the following composition is used to make the composite material: 83.5 wt.% low-density polyethylene, 7.0 wt.% ammonium-magnesium orthophosphate (struvite), 1.6 wt.% modified mixed component (mechanical mixture of 0.8 wt.% potassium dihydroorthophosphate and 0.8 wt.% of standard complex mineral fertilizer, subjected to successive precipitation of stearate and calcium silicate in order to reduce solubility in water), 0.8 wt.% calcium silicate, 0.8 wt.% magnesium silicate, 6.3 wt.% ammonium carbonate. Obtained composite material has density of 0.55 g/cm³, water absorption – 29 wt.%.

EFFECT: efficient cleaning of water of separate water areas from domestic contaminants.

3 cl, 8 dwg, 1 tbl, 2 ex