Biological Treatment
The biologically accomplishment of waste water is done by using a variety of microorganisms. The microorganism converts colloidal and dissolved organic matter into various gases and simpler molecules which can be further removed by gravity settling. In Biological Treatment Various Treatments are available as listed below.
Activated Sludge Process
- In the Activated Sludge Process, microorganism thoroughly mixed with organic compounds contained in wastewater under such conditions that stimulate their growth. As the microorganisms grow and are mixed by the agitation of the air, the individual organisms flocculate to form an active mass of microbes called activated sludge that derives the name of the process as ‘Activated Sludge Process’.
- In a conventional activated sludge process, the wastewater is typically aerated for six to eight hours in a long, rectangular aeration basin. Sufficient air is provided to keep the sludge in suspension. The air is injected from the bottom through a system of diffusers.
MBBR technology: Better performing than ASP, it needs less space and thus saves money. This technique is perfect to use where there is space constraint. The water treated using this technology can even be used for washing and gardening.
UASB technology: It is appreciated by the clients for low power consumption as compare to any other technology available in the market. Further, the Biogas generated using this technique can be used for the high capacities plant and to the run the full plant after converting it to electricity. The treated water from this plant can even be used for gardening.
Sequential Batch Reactor (SBR): It helps in treating the waste water in Batches and hence it is perfect to use where the waste water generated per day is very low. The technology also helps in saving the running cost and low sludge generation. No need of separate clarifier or settling tank.
Aerobic Treatment
Aerobic is the process in which microorganisms convert organics waste into carbon dioxide and new biomass in the presence of oxygen. Aerobic treatment requires continuous oxygen supply so forced air from air blowers is mixed with the wastewater, where the aerobic bacteria feed on the waste in the water.