Water Disposal

Discharge to sewer and surface water according to regulations

This is the most frequent requirement of municipalities and businesses with regard to sewage treatment: disposing of water according to regulations avoids incurring increasingly severe penalties. European and national requirements need to be known in order to properly carry out the appropriate operations, along with the parameters for assessing the quality of the effluent to be treated.

Our range of wastewater treatment systems

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.
Filtri a Tela a Fibra Libera

Pile 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.
Filtri a Sabbia Continui Filtrasand

Filtrasand Continuous Sand Filters

for tertiary water treatment

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.
Decantatori a Pacchi Lamellari Flowpack

Flowpack Lamella-Pack Decanters

for sludge settling

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.
Disoleatori a Pacchi Lamellari Oilpack

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.
Supporti per Biofilm

Filling Materials

for biological treatments

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.

The European directive on water disposal

Requirements for urban wastewater treatment, and more specifically for the disposal of treated water, are set out in European Directive 91/271/EEC. This legislation provides that treated urban wastewater may be disposed of in water bodies or in sewers, provided that it meets certain quality requirements. It is necessary in this regard to recall the two types of reference values established by this rule.

  • Minimum requirements: these are mandatory for all member states.
  • More stringent requirements: may be implemented by member states, at their discretion.

The minimum requirements for regular disposal of treated water into water bodies are as follows:

  • BOD5: 25 mg/l
  • CODCr: 125 mg/l
  • SS: 35 mg/l
  • NH4-N: 10 mg/l
  • Ptot: 1 mg/l
  • Escherichia coli: 1000 CFU/100 ml

Some member states have set more stringent requirements for heavy metal content in treated water: it is good to know these values so that regular disposal of water to sewers and surface bodies can be carried out.

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Smaltimento Acque secondo Normative

Disposal of water to sewers or water bodies: technical needs and processes

Wastewater may contain a variety of pollutants, including:

  • organic substances, such as vitamins and antibiotics, but also hydrocarbon soil compounds;
  • inorganic substances, such as mineral salts, acids and metals;
  • toxic substances, such as strong solvents and bases.

It is then necessary to know the parameters by which wastewater quality is assessed:

MITA Water Technologies' solutions for water disposal

MITA Water Technologies has developed solutions for different treatment needs, for the purpose of treated water disposal, and for different treatment stages of a civil sewage treatment plant.

  • Flowpack lamella-pack decanters (primary treatments): compact execution, low investment costs, large active surface area due to lamellar pack channels.
  • Oilpack lamella-pack oil separators (primary treatments): high solid-liquid separation efficiency, easy installation and operation.
  • Biorulli® rotating biological contactors (biological, secondary treatments): a biodisc biological oxidation system. Compact and modular solution, minimal energy consumption.
  • Filtrasand sand filters (tertiary filtration): low investment and operating cost technology for removal of suspended solids, including colloidal.
  • Free-fiber cloth filters (tertiary filtration, finishing stage): a solution with high solids removal yields, minimal water and energy consumption.
  • Biocombi compact plants (secondary and tertiary treatments). The synthesis of biodiscs and cloth filters in a small footprint system, excellent for water disposal in small communities.
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Some MITA projects

Filtro a Sabbia e Flottatore per Lavorazione Alluminio

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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