Biological Wastewater System (Aerobic & Anaerobic)


Biological wastewater treatment cultivates bacterial cultures of protozoa and other microbes in suspended growth or attached growth systems to degrade organic contaminants in wastewater. The biological wastewater treatment process includes three major steps:

  • Aerobic treatment step uses oxygen to promote aerobic microorganisms; the Anoxic treatment step refers to the absence of free oxygen but the presence of bound oxygen such as nitrite or nitrate. This step removes nitrogen-based compounds from wastewater and helps control the pH and alkalinity; and Anaerobic treatment step refers to a total absence of free oxygen (O2) or bound oxygen (NO2, NO3). This stage promotes anaerobic bacteria.

BW Water is capable of combining biological treatment such as CSAS or MBBR technologies with Hydro-PAQ™ technology to treat large volumes of wastewater with a reduced footprint and less energy consumption than conventional treatment methods.

These technologies provide an Aerobic-Anoxic-Anaerobic system and clarification to reduce the amount of total suspended solids (TSS), heavy metals, and organics such as BOD or COD.