The first step in the process adjusted the pH of the wastewater and also adjusted the ratio of carbon nitrogen and phosphorus to provide ideal conditions for biological wastewater treatment. After this the wastewater is then fed to the biological wastewater treatment system. Here the fixed bed biological wastewater treatment is fed with equalized flow of wastewater. Supplying biological treatment steps with equalized continuous flow is very important as it provides good conditions for the biomass to develop and clean the wastewater.
Biologically treated effluent then enters the lamella clarifier and any of the remaining solids settle in the clarifier. The solids then removed by sludge return pump. Relative to other biological treatment process technologies such as MBBR & MBR, fixed bed biological process is far easier to operate, has lower running costs, does not require chemicals for cleaning, and does not use membranes. So overall the FBBR solution has the lowest OPEX on the market.
The final solution implemented on site for this project provides a very compact footprint with some of the system installed below ground. The system operates automatically with minimal use of chemicals and no need for continuous operator input. The system also cleans the wastewater completely biologically and naturally without the need for dissolved air floatation. The system was installed on time and on budget and allows the dairy industry to achieve compliance with their wastewater discharge standards.