1. Moving Bed Bio Reactor(MBBR)

Azure water Technologie’s Moving Bed Bio-Reactor (MBBR) technology is based on the bio-film principle with an active bio-film growing on small specially designed plastic carriers that are kept suspended in the reactor. It is one of the advanced biological treatment processes which have a great potential for the simultaneous and efficient removal of nutrients along with organic matter.

It is a process coupling suspended activated sludge and attached growth process in a single system. The technology utilizes the advantages of both activated sludge and other bio-film systems (e.g. bio-filters, bio-rotors etc.) without being controlled by their disadvantages. The carriers are designed in such a way that it provides a large protected surface area for the bio-film and optimal conditions for the bacteria culture while suspended in the water.

It is also known as Fluidized Bed Bio Reactor. In fluidized bed bioreactors the waste water is fed upward to a bed of 0.4 to 0.5 mm sand or activated carbon. The bed depths are in the range of 3 to 4 m with the specific surface area of about 100 m2/m3 of the reactor volume. Up flow velocity is 30 to 36 m/h. The hydraulic retention time in the FBBR is ranging from 5 to 20 min. For aerobic applications re-circulated effluent is passed through an oxidation tank to pre dissolve oxygen. Adding air to the FBBR would discharge packing to the effluent. For waste water treatment, FBBRs have been used mainly for the post de-nitrification. Aerobic FBBRs are frequently used to treat groundwater contaminated with hazardous substances.

2. Membrane Bio Reactor(MBR)

Azure Water Technology’s innovative MBR system is a progression of the company’s proven sewage treatment technology for handling grey and black waste water. Membranes act as a barrier to bacteria and suspended solids to produce a low turbidity treatment plant effluent with very low bacteria counts.

MBR is the combination of a membrane process like microfiltration or ultra filtration with a suspended growth bioreactor. This very compact arrangement produces a MF/UF quality effluent suitable for reuse applications or as a high quality feed water source for Reverse Osmosis treatment. The MBR process can be employed in activated sludge processes, using the membranes as liquid-solid separation instead of the usual settling. It has high separation property due to trans-membrane pressure, blocks sludge & large molecules in the membrane letting clear water to permeate through.

MBR Process

• Pre-Treatment
• Pre Screen
• Oil & grease removal
• Sand removal & fine screen
• Bio Reactor
• Submerged membrane/Airlift membrane
• Air blowers diffuse air to the wastewater
• Balance sludge discharge through pump
• Clear water will be permeated out by self priming pump at vacuum pressure through MBR Modules

3. Sequencing Bio(Batch) Reactor(SBR)

The sequencing batch reactor (SBR) process is a sequential suspended growth (activated sludge) process in which all major steps occur in the same tank in sequential order. The complete five phases take place in single reactor thus reduces the footprint. SBRs can be designed and operated to enhance removal of nitrogen, phosphorus, and ammonia, in addition to removing TSS and BOD. The five stages of SBR are:

• FILL: Wastewater fills the tank, mixing with biomass that settles during the previous cycle.
• REACT: Air is added to the tank to aid biological growth and felicitate waste reduction.
• SETTLE: Mixing and Aeration stop during this stage to allow solids to settle.
• DRAW: Clarified effluent is discharged.
• IDLE: Sludge can be removed during this stage.