Rimozione Fosforo nel Trattamento Acque

Removal of Phosphorus from Wastewater

Phosphorus is an essential nutrient for life, but in excess it can cause water eutrophication with algae growth and weakening of the aquatic food chain. Chemical treatments are among the most widely used processes for removing phosphorus from wastewater, and efficient sedimentation and filtration units provide valuable support.

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Contattori Biologici Rotanti a Biodischi Biorulli

Biorulli® Biological Oxidation System

for biological wastewater treatment

An efficient, highly flexible, and low-energy solution for secondary treatments, the Biorulli® biological oxidation system, a solution also referred to as "biological disc rotors," has very low operating and maintenance costs.
Biocombi Compact Plant

Biocombi Compact Plants

For wastewater treatment of small communities

Highly efficient biological oxidation and depth filtration: these two steps are integrated in Biocombi, a compact plant for wastewater treatment in small communities, i.e., small towns or hamlets, resorts, hotels. Small footprint, flexibility for sudden changes in hydraulic and/or organic load, minimal energy use.
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Free-Fiber Cloth Filters

for tertiary wastewater treatment

Very high solids removal yields and minimal product life cycle cost: these are the advantages of pile cloth filters for tertiary filtration. These are filtration systems suitable for industrial and civil wastewater and, in some cases, stormwater.
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Filtrasand Continuous Sand Filters

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Efficiency and continuity of operation: continuous sand filters represent a classic solution that is easy to construct and operate for wastewater finishing. Thanks to a unique patented washing system, the MITA solution allows the filter medium, i.e., sand, to be separated from impurities.
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Flowpack Lamella-Pack Decanters

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A simple and very efficient solution: in lamella-pack decanters, solids-water separation is achieved through a dense network of channels, inclined at 60° to accelerate the settling of suspended solids.
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Oilpack Lamella-Pack Oil Separators

for process oil removal

Lamella-pack oil separators, often installed already at the primary treatment level, prevent particularly environmentally harmful components such as oils and hydrocarbons from reaching water bodies at the time of spillage. Slats inclined at 45° make the system efficient. Separated substances can also be recovered for better cost-effectiveness of the whole system.
Flottatori ad Aria Disciolta Mitadaf-Mitasat

Dissolved Air Flotation Units

for water clarification

Dissolved air flotation units are devices used in water treatment processes to separate suspended solids and other particles by forming bubbles that attack solid particles to make them less dense and rise to the surface as sludge or foam. They are used in primary civil wastewater treatments and in industries such as paper, food and oil & gas. MITA Water Technologies offers Mitadaf, a highly efficient system that combines uniform hydrodynamics and microbubble filtration.
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Filling Materials

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Wastewater is mainly contaminated with organic matter, which is decomposed by bacteria. These bacteria consume oxygen, which is essential for aquatic life. Percolating filters, and related biofilm media, provide a favorable environment for the growth of bacteria, thereby reducing oxygen demand and improving water quality.

Phosphorus removal: needs for civil and industrial wastewater

Phosphorus is an essential nutrient for plant growth, which is why its excessive presence in wastewater can lead to the phenomenon of eutrophication, with excessive algae blooms.

This can also lead to a number of negative consequences:

  • clogging of waterways,
  • weakening of the aquatic food chain,
  • difficulty in aquatic respiration and fish mortality.
Rimozione Fosforo nel Trattamento Acque

Phosphorus removal: methods and processes

As in other cases, the choice of the most suitable method for phosphorus removal from wastewater depends on the characteristics of the water to be treated.

These are some of the most common processes for wastewater treatment.

  • Biological treatment. It is an effective, economical, and sustainable process for removing phosphorus from civil and industrial wastewater.Some solutions proposed by technology providers are relatively simple to install and use.
  • Chemical treatment. The use of products is one of the most popular practices for phosphorus removal from wastewater, especially when loads exceed treatment capacity by biological means. Reaction with specific reagents, such as ferric chloride, make phosphorus insoluble in water and thus separable by sedimentation.
  • Sedimentation. When used as a stand-alone treatment, it is appropriate only when the concentration of the pollutant is low. In contrast, it is still an integral part of biological and chemical treatments.
  • Filtration. This is generally a useful refinement process, to be applied downstream of the technologies already seen, when the required removal performance is particularly demanding. It can, under special circumstances, be combined with chemical treatment without including intermediate sedimentation.

MITA Water Technologies' solutions for phosphorus removal

MITA offers some water treatment solutions that, especially as a complement to further mechanical and chemical treatments, can support phosphorus removal.

  • Lamella-pack decanters. They are a type of settler that uses a series of lamellae to significantly reduce the size of the tanks. They act on all settleable pollutants, thus including phosphorus after chemical treatment. Chemical preparation tanks and pre-decanter coagulation-flocculation tanks can be provided as needed.
  • Drum filters and free-fiber cloth disc filters. As a consequence of the efficient removal of total suspended solids enabled by these solutions, phosphorus in water also decreases. Their use as stand-alone units is usually indicated for a finishing of other upstream treatments, when the discharge concentration of phosphorus is very stringent. But their direct, post-precipitation chemical use is also possible under particular conditions.
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Water Treatment and Cooling Systems for Vedani Group

Various industrial water treatment technologies as well as cooling technologies: since 1995 MITA Water Technologies has provided multiple solutions, together with its "sister" company MITA Cooling Technologies, for the complete water management of Vedani Group, which has been active in aluminum processing since 1982.

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