Chemical Engineering @ChemengFiles.Com

Please use the already defined membrane systems nor filtration, the remaining options for wastewater treatment are relatively short. Within the so-called intensive technologies for water treatment, it is possible to mention the membrane bioreactors (BRM), a sequential batch reactors and also the bio. Now, briefly explain what constitutes each of these technologies.

Sequential Batch Reactors
Work through the activated sludge. In this system, both the functions of aeration and sedimentation, such as decanting, is made in the same reactor. It is usually used at least two tanks for the reaction, thus ensuring a continuous waste water treatment and efficiently. These systems do not occupy large areas and have very competitive costs. Generators are high quality effluents and also easily treated for regeneration.

Aerobic
They are essentially fixed biomass reactors. Its structure consists of a system of hard disks in a rotating shaft. Through this rotation, all located on parallel disks are exposed alternately to air and water to be treated. Microorganisms are responsible for set break down organic matter using some aerobic processes.

The RBCs are a water treatment system very reliable and economical in terms of energy required. In those small, well-sized facilities, the effluent is of very high quality. Often requires only disinfection for reuse.

Membrane Bioreactors
These technologies are to put a membrane inside a ventilation system (known as activated sludge treatment). This membrane does not allow passing the biosolids remaining in the reactor. It strikes a very good effluent quality, easy to disinfect. It is also common outer membranes are used outside the reactor.

In both cases, it is possible to specify an elimination of large pathogens. Such as Giardia and Cryptosporidium. Physico-chemical systems Physical systems involve chemical treatment with a reagent, which causes a coagulation-flocculation, continuous filtration with sand or other similar system. Generally, the reactants are inorganic coagulants, organic polymers or combinations of both. They provide a disinfectant, and remove all viruses and bacteria that are embedded in solids.