WCW24

While popular as a source of renewable energy, traditional Anaerobic Digestion (AD) processes can create undesirable challenges at WWRFs. These problems increase chemical and energy costs and create many operational challenges. By adding an Acid Digester before and an Aerobic Reactor after AD, some significant improvements in plant, digester and dewatering performance can be realized. These proven processes are well-established but, when they are used in concert with an innovative recycle loop, the solids process is enhanced in many ways while providing nutrient control to benefit the liquid stream. The denitrification step inhibits H2S and Struvite Production and produces more and cleaner gas, reduces odor and ensures robust digester performance. This can be accomplished without addition of FeCl, adding further savings and optimization.