Description

The active sludge biological treatment to this day is the most diffused process in civil and industrial wastewater treatments.
In these plants, the microorganisms contained in biological sludge require to be adequately oxygenated and maintained in suspension. In this way they are placed in a condition to effectively degrade the organic matter and convert compounds such as nitrogen and phosphorus. This is done by using disc or tube micro-bubble air diffusers with a micro perforated membrane on most of its surface.
These membranes are used for both continuous or intermittent aerations.

The diffusers are installed with even distribution on special nets, placed at the bottom of the treatment tanks.
The air supplied by a blower system is distributed inside the net to each diffuser therefore inflating the membranes and opening the passages consisting of small holes. The air spreads evenly throughout the mass of water and sludge in the form of fine bubbles.
This allows the transfer of oxygen to the biomass with the best possible efficiency.

The Envicon air diffusers offered by MITA Water Technologies are represented by their high construction and performance qualities. Furthermore, they allow to build targeted installations for each type of construction.

Aeration systems with fine bubbles membrane.

The supply of oxygen in activated sludge plants constitutes the bulk of the power supply requirements for depuration.
The increasing requirements in terms of quality of purified water and the low operational costs require modern and efficient aeration equipment, easily adaptable to process flexibility requirements.

The membrane aerators, unlike those in ceramics, are also used in intermittent operational conditions since the perforations of the membrane only open during air intake. This will prevent the infiltration of sewage sludge and mud in the system.
The membrane aerators are used in biological oxidation processes of carbon, in the nitrification process and in phosphorus removal treatments

MITA Water Technologies proposes the envicon systems aerators manufactured with EPDM membrane which high quality standards warrant durability and cost-effectiveness of the aeration system.
The making of the membrane occurs through a vacuum injection molding process which prevents air inclusions during the production phase. A modern laser technology is then used for the fine perforation of the membrane.

The envicon systems membrane aerators stand out on the market for their high and constant quality features and durability.

Aeration systems with fine bubbles membrane.

The supply of oxygen in activated sludge plants constitutes the bulk of the power supply requirements for depuration.
The increasing requirements in terms of quality of purified water and the low operational costs require modern and efficient aeration equipment, easily adaptable to process flexibility requirements.

The membrane aerators, unlike those in ceramics, are also used in intermittent operational conditions since the perforations of the membrane only open during air intake. This will prevent the infiltration of sewage sludge and mud in the system.
The membrane aerators are used in biological oxidation processes of carbon, in the nitrification process and in phosphorus removal treatments

MITA Water Technologies proposes the envicon systems aerators manufactured with EPDM membrane which high quality standards warrant durability and cost-effectiveness of the aeration system.
The making of the membrane occurs through a vacuum injection molding process which prevents air inclusions during the production phase. A modern laser technology is then used for the fine perforation of the membrane.

The envicon systems membrane aerators stand out on the market for their high and constant quality features and durability.

System advantages

• Patented (EMS) disc diffusers
• (EMR) tube diffusers of various lengths
• Membranes available in different materials
• High quality standards
• High oxygen transfer efficiency
• Availability of (patented) plastic material accessories for a simple installation

Application fields

• Continuous or intermittent aeration: in spite of what happens with diffusion systems through “porous” materials clearly exposed to clogging phenomena in case of discontinuous functioning of the system, the envicon membrane diffuser, either the tube or the disc type, is particularly suitable for use in intermittent aeration systems. This is due to the self-cleaning micro holes caused by membrane deformation during the insufflation (opening of micro holes) and the release (closing of micro holes) phases. When the insufflation has stopped, the check valve from the central area of the membrane prevents water leakage in the distribution pipes.
• Aeration of the biological treatment of activated sludge: the activated sludge process is an aerobic process; the proper functioning of the air diffusion system inside the oxidation tank is therefore essential either for an even oxygen supply to the biomass or for an effective mix of water-mud aerated suspension. In this regard, the use of the envicon microbubble diffusers ensures the attainment of both goals, either in terms of oxygen supply uptake rate or even distribution of air.
• Aerobic digestion of biological sludge: the activated sludge system adopted in plants that range from 5.000 to 20.000 PE normally does not require the presence of primary sedimentation and generates an abundant formation of excess sludge highly putrescible, which if sent to the stabilization tank and are aeated for insufflation with the use of envicon microbubble tube diffusers, loose this feature. The stabilization tank provides the recycling of sludge from sedimentation sections, partly to the stabilization tank and partly to the oxidation tank, where the envicon microbubble diffusers find their natural place.