Oxidation in membrane MBR
The biological processes defined as membrane bioreactors (MBR) are obtained by combining an activated sludge biological treatment system with a membrane filtration process, replacing the classic gravity decantation. This type of treatment, in addition to being more efficient than classical active sludge, offers the possibility to reuse part of the purified water, thanks to its high degree of chemical, physical and bacteriological purity.
Unlike conventional systems, where solids and micro-organisms are removed by gravity in the sedimenters, MBR systems use a very small “cut off” membrane filtration unit, such that the water leaving after the MBR it is very similar to that produced with ultrafiltration systems, having values of SDI <3 and molecular size of about 0.03 microns.
Thanks to its decennial know-how in the field of water treatment, Ingegneria Alimentare applies to the newly developed plants, the innovative membrane oxidation technology, MBR.
This type of plant, which aims to recover water from wastewater, provides:
▶A pretreatment with a 0.4 mm filter screw used to rough the larger part of the wastewater
▶A micro filtration membrane process
▶An oxidative phase MBR
▶A final phase of ultrafiltration.
The membrane oxidation process is applicable in the classic industrial purification plant consisting of the following functional parts:
– Storage of the material to be treated. The storage part consists of silos of various sizes, from preparation silos and homogenization of the product to be treated
– Heated flotation device to separate the possible presence of precipitable solid bodies
– Continuous multi-effect concentrator
– Dehydration of the concentrate by means of a scrapped body concentrator and also with a belt press
– Water treatment to be drained in sewer or river by activated carbon filtration