Biological depuration plants are particularly suggested to
treat wastes from civil applications and industrial realities
whose wastewaters would be degradable due to oxidation
processes by organic microorganisms.
This type of treatment can be applied on different sizes, from the small civil ones to the large industrial ones, until arriving to consortium plants in service for the community.
It will be the responsibility of our technical department to identify the best solution for the examined reality, choosing equipments and components with the maximum reliability through time, without omitting the low cost of management and operation.
The membrane biological reactors (MBR) come from the coupling of
traditional suspended biomass processes with filtration processes on
micro porous or ultra porous membranes, depending on the nominal
size of the pores.
The major advantages of this technology are found in the possibility to eliminate the sedimentation unit at the end of the biologic sector and all management and operational liens related to it. The substitution of the sedimentation sector with a membrane filtration sector involves:
- a significant reduction in planimetric encumbrance of the filtration plant;
- the ability to manage the biological process in a totally independent way from the fluctuations of hydraulic load;
- the reduction of excess sludges;
- the elimination of sludge sedimentation problems usually found in conventional activated sludges plants;
- the significant improvement of the qualitative characteristics of the wasted water.
The MMBR sewage treatment plants are formed by biological reactors in which microorganisms flourish on media support, dispersed and suspended in the wastewater. The biofilm that is formed on these supports is a function of the organic load associated with the incoming wastewater.
The MBBR technology is particularly suitable for the extreme flexibility of layout and for the simplicity and efficiency of the process, they are used in municipal intensive systems, extensive lagoons, fish farms, food industries, paper mills and chemical plants.
The MBBR reactors can be made with or without recirculation of the sludge from the secondary sedimentation tank, the movement of the elements is ensured by the system of air injection or by mechanical mixers..
The main features of the moving bed reactors can be summarized as follows:
- Operate continuously
- Have limited load losse
- Have a good versatility in the management phase
- Save spacing system