2. Aerobic Treatment

      A. ASP (Activated Sludge Process)

Activated Sludge Process

In activated sludge process waste water containing organic matter is aerated in an aeration tank in which micro-organisms metabolize the suspended and soluble organic matter. Part of organic matter is synthesized into new cells and part is oxidized to CO2 and water to derive energy. In activated sludge systems the new cells formed in the reaction are removed from the liquid stream in the form of a flocculent sludge in settling tanks. A part of this settled biomass, described as activated sludge is returned to the aeration tank and the remaining forms waste or excess sludge.

      B. SAFF Reactors (Submerged Aerobic Fixed film Reactor)

Submerged Aerobic Fixed film Reactor

The SAFF plants are available as compact packaged plants or as packaged modular systems. These will treat municipal or industrial wastewater to achieve degrees of treatment, such as BOD removal, Nitrification and/or total Nitrogen reduction and Phosphorus reduction.

      C. Diffused Aeration

Diffused Aeration

An air diffuser or membrane diffuser is an aeration device typically in the shape of a disc tube or plate, which is used to transfer air and with that oxygen into sewage or industrial wastewater Oxygen is required by microorganisms/bacteria residents in the water to break down the pollutants.

      D. Trickling Filter

Trickling Filter

A trickling filter is a fixed-bed, biological reactor that operates under aerobic conditions. Pre-settled wastewater is continuously 'trickled' or sprayed over the filter. As the water migrates through the pores of the filter, organics are degraded by the biofilm covering the filter material.

      E. MBR (Membrane Bioreactor)

Membrane Bioreactor

MBR is the combination of a membrane process like microfiltration or ultra filtration with a suspended growth bioreactor, and is now widely used for municipal and industrial wastewater treatment.

      F. MBBR (Moving Bed Biofilm Reactor)

Moving Bed Biofilm Reactor

This technology provides cost-effective treatment with minimal maintenance since MBBR processes self-maintain an optimum level of productive biofilm. Additionally, the biofilm attached to the mobile bio carriers within the system automatically responds to load fluctuations.

      G. Sequencing Batch Reactors (SBR)

Sequencing Batch Reactors

Sequencing batch reactor or sequential batch reactors are industrial processing tanks for the treatment of wastewater. SBR reactors treat wastewater such as sewage or output from anaerobic digesters or mechanical biological treatment facilities in batches. Oxygen is bubbled through the wastewater to reduce biochemical oxygen demand (BOD) and chemical oxygen demand (COD) which makes the effluent suitable for discharge.