Contattori Biologici Rotanti a Biodischi Biorulli

Biorulli® Biological Oxidation System

for biological wastewater treatment

An efficient, extremely flexible and low energy-use solution for secondary treatments: the Biorulli® biological oxidation system, a solution also referred to as “biological disc rotors,” summarizes functional peculiarities of activated sludge and percolating filters, offering a viable alternative to both by exploiting their best features. Very low operating and maintenance costs.

Extreme flexibility with load variations.

Extreme flexibility with load variations. The system is insensitive to large variations (plus or minus) in both biological and hydraulic load, even if they last for many hours.

Modularity and scalability.

Modularity and scalability. Facilities can be upgraded at later times by adding additional units.

Low energy use.

Low energy use. The system works mechanically. Consequent lowering of operating costs.

Rapid, mechanical starting.

Rapid, mechanical starting. The system starts up in a short time (10÷15 days) without the need for inoculation of bacterial flora.

Compactness and adaptability.

Compactness and adaptability. The small size allows in different spatial configurations.

Ease of operation and maintenance.

Ease of operation and maintenance. The purely "mechanical" operation of the machine does not require specialized personnel. The wear and tear of mechanical parts is negligible, the administration of additives or reagents is not expected.

Our range of Biorulli®

Sistemi di Ossidazione Biorulli Monoblocco M 115

Biorulli® Biodiscs Monoblock M 115

Efficient, compact, extremely flexible with different pollutant loads: the Biorulli® biological oxidation system, monoblock M 115 series, is ideal for biological water treatment in apartment buildings, villas, small campsites, and factories.
Sistemi di Ossidazione Biorulli Monoblocco M 200

Biorulli® Biodiscs Monoblock M 200

An intermediate-sized version of the one-piece biodiscs, the M 200 series is suitable for hotels, villages, small communities, and industries. Tank optionally made of treated and painted carbon or AISI 304-316 stainless steel. Efficiency and extreme ease of installation.
Sistemi di Ossidazione Biorulli Monoblocco M 240

Biorulli® Biodiscs Monoblock M 240

It is the monobloc version, thus consisting of rollers and tank, with larger dimensions, useful for plants with more important disposal needs: nevertheless, M 240 biodiscs feature the same simplicity of installation, operation and maintenance typical of biological treatment solutions offered by MITA Water Technologies.
Sistemi di Ossidazione Biorulli Rulli Dischi B200

Biorulli® Biorotors B 200

The disc rollers, B 200 series, are the Biorulli® biodiscs biological oxidation solution: allowing high versatility in the face of widely varying effluent loads throughout the year. All this in conjunction with truly affordable acquisition costs.
Sistemi di Ossidazione Biorulli Rulli Dischi B240

Biorulli® Biorotors B 240

B 240 series biorotors are a cost-effective version for medium-sized biodiscs for biological treatment of industrial and civil wastewater to be installed in concrete tanks. Small footprint and easy and simple installation.
Sistemi di Ossidazione Biorulli Rulli Dischi B290

Biorulli® Biorotors B 290

A solution with large-diameter biodiscs for sizable plants, but with the same simplicity of installation, operation and maintenance as all Biorulli® rotating biological contactor series: these are the Model B 290 Disc Rollers.
Coperture per Biodischi Biorulli CB200-CB240

CB 200 – CB 240 Covers

Biorulli® covers of this type can be requested by customers for biodiscs installed in concrete tanks.

Biorulli® oxidation system: description and operation

The Biorulli® biodisc biological oxidation system uses one or more rotating rollers to break down the organic matter contained in wastewater. It is an aerobic biological treatment system: oxygen, and the aerobic bacteria that derive “nourishment” from oxygen, play an important part in the decay of pollutants in civil or industrial wastewater.

Biodiscs, also called “biological disc rotors” or even “rotating biological contactors,” share some peculiarities of activated sludge and percolating filter systems.

In the Biorulli® oxidation system, biodiscs are fixed on a central shaft in varying numbers depending on the model. By means of a gear motor, the shaft is turned very slowly (1 ÷ 5 revolutions per minute, depending on the model and the characteristics of the effluent). The disks, made of propylene, are partially immersed (about 40 percent of their diameter) in a tank through which the effluent to be purified flows.

It is precisely the contact between effluent and biodiscs that encourages the formation of bacterial flora on the propylene (plastic material) surface of the discs.

The flora, thanks to the continuous rotation of the discs, is alternately immersed in the sewage and brought into contact with the air: in the first phase it takes up the organic matter necessary for its nourishment, and in the second it becomes saturated with oxygen, a fundamental element of the biological oxidation process and thanks to which the bacteria themselves carry out the aerobic process. The layer of bacterial flora, having exhausted its life cycle, then independently detaches itself from the surface of the biodiscs in the form of easily sedimentable flakes.

Ask for Information

Some MITA Projects with Biorulli®

Biodiscs and Sand Filters for Coastal Depots of Esso

MITA Water Technologies provided ESSO Italiana with wastewater treatment solutions at the coastal depots in Naples and Palermo. Through the use of continuous regeneration sand filters and Biorulli(r) biodiscs, significant results were achieved, such as reduced energy consumption and maintenance costs, plant modularity, and compliance with current regulations.

Read more

Tools to help you choose


Industrial and civil wastewater treatment technologies

Simplicity, reliability ... and the lowest product life cycle cost: water treatment solutions from MITA Water Technologies.

Our support throughout the product life cycle

We offer a series of additional support services for our customers: the MITA Lifecycle Services.
Idea icon

A sustainable and efficient solution for every industry and need

Wastewater treatment will increasingly be a resource efficiency and optimization opportunity for organizations in both civil and industrial settings.