The Challenge: Many food processing industry wastewaters contain high concentrations of readily degradable organic material and over the past twenty years the implementation of anaerobic treatment processes has gained popularity as the preferred first stage biological process. Anaerobic processes have many advantages over aerobic processes and the two key ones are very low production of surplus biomass, and the production of methane which can be recovered as an energy source. There are a number of proprietary anaerobic processes available in the market today but the use of conventional low, medium, and high rate anaerobic contact processes has gained popularity. The contact processes are often carried out in large, slope walled basins (i.e. anaerobic lagoons) or circular tanks generally ranging from 50-150-ft. in diameter. In all cases the basins are covered in order to maintain optimum liquid temperatures and capture/recover methane. As with any process the optimization of mixing the basin contents can improve the process performance markedly. KLa jet mixers are the technology of choice in these applications due to their flexibility of configuration in any basin geometry, highly corrosion resistant in-basin components, use of simple, external pumping systems, and a +20 year design life
Whitepaper by KLa Systems, Inc.