Sewage Treatment Plant (STP)

Based on direct B to B marketing, referrals received, strong trade show presence and a comprehensive local network; potential clients in need of water or wastewater solutions are identified and later provided with business development insights, engineering designs as well as procurement and installation procedures.

Sewage Treatment Plant (STP)

Sewage Treatment Plant (STP) based on black water: To make wastewater acceptable for reuse or for returning to the environment, the concentration of contaminants must be reduced to a safe level, usually a standard set by the Environment Agency. Sewage treatment is the process of removing contaminants from wastewater, primarily from household sewage. Physical, chemical, and biological processes are used to remove contaminants and produce treated wastewater that is safer for the environment.


We Design, Fabricate, Supply, Erect and Commission Sewage Treatment Plants (STP) for treating sewage generated by Industry, large colonies, Hotels, Hospitals and commercial buildings.

We also offer different technologies in STP in cooperation with our foreign principals:

  • Aerobic Biological (ASP) STP: In this process, aerobic bacteria digest the pollutants. To establish an aerobic bacterial colony, providing air for the bacteria is a must to breathe. Air is continuously supplied to the Biozone either by direct Surface Aeration systme, or by Submerged Diffused Aeration using blowers for air supply through bubble diffusers at the bottom of the tank. Aerobic conditions lead to an aerobic bacterial colony being established. These achieve almost complete oxidation and digestion of organic matter and organic pollutants to Carbon Dioxide, Water and Nitrogen, thus eliminating the odour and pollution problem. The effluent produced by this process is non-polluting and can be discharged to a watercourse
  • Anaerobic Biological STP: Sewage is partly decomposed by anerobic bacteria in a tank without the introduction of air containing oxygen. This leads to a reduction of Organic Matter into Methane, Hydrogen Sulphide, Carbon Dioxide etc. It is widely used to treat wastewater sludge and organic waste because it provides volume and mass reduction of the input material to a large extent. The methane produced by large-scale municipal anerobic sludge treatment can be used for electricity production or heating purposes. Septic tanksare an example of an anerobic process, but the septic tank effluent still contains about 70% of the original pollutants and the process smells very badly, due to the Hydrogen Sulphide, if not vented correctly
  • Moving Bed Biofilm Reactor (MBBR) STP: The concept behind the MBBR reactor is to provide continuously operating bio-film reactor which does not clog and does not require re-circulation of sludge. This is achieved by making the bio-film grow in smaller carrier elements that move along with beads in the reactor. MBBR media is kept in constant rotary movement by air diffusers. The diffuser constantly keeps the bio-media moving and at the same time provides the required oxygen to the bio-mass. Apart from making the plant compact, the MBBR reactor employing principle of attached growth process, makes the plant more user friendly because it does not require sludge recycle. In this technology the sludge generation is small in quantity as compared to conventional treatment process.
  • Membrane Bio-reactor (MBR) STP: Membrane bioreactor is the combination of a membrane process like microfiltration or ultrafiltration with a biological wastewater treatment process, the activated sludge process. The sludge production is less than that of MBBR (Mixed Bed Bio Reactor), due to a concentration of bacteria that is 4-5 times higher (held within the membrane). On top of that, there is no sludge settlement required, so less space is needed. Furthermore, depending on the size of the pore diameter, even germs can be separated from the water.
  • Sequential Batch Reactor (SBR) STP: SBRs are a variation of the activated-sludge process. They differ from activated-sludge plants because they combine all of the treatment steps and processes into a single basin, or tank, whereas conventional facilities rely on multiple basins. The operation of an SBR is based on a fill-and-draw principle, which consists of five steps—fill, react, settle, decant, and idle. These steps can be altered for different operational applications.


If you would like more information about FloWater, please contact one of our offices or use the form below to contact your area of interest.

Corporate Office

Plot 19, Road 68/A
Unit A1, Gulshan 2
Dhaka 1212, Bangladesh.

Phone: +880 18 33320353

Fax: +14169072690


Branch Office

309, Sheikh Mujib Road
Unit 7 & 8, Level 6
North Agrabad
Chittagong 4000, Bangladesh.

Phone: +880 18 33320355


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