By decoupling aeration from mixing, BioCycle-D operates on the principle of alternating aerobic and anoxic conditions to optimize digestion and save energy. Through instrument feedback, the BioCycle-D controller automatically transitions the cycles from aerobic for volatile solids destruction to anoxic/anaerobic for facilitating denitrification, alkalinity recovery, and energy savings.

BioCycle-D facilitates nutrient removal and sequestration to optimize the aerobic digestion process, thus improving the treatment efficiency of nitrogen and phosphorus in the activated sludge process. Automatic controls adjust the process phases for variable sludge loading rates, providing significant reduction in nitrogen and phosphorus in the supernatant return stream to secondary process. BioCycle-D is able to uniformly mix sludge at concentrations up to 4% solids and meet Class B Biosolids for land application. Keeping contents mixed facilitates denitrification and allows for further treatment. Completely mixed, air-off time periods allow for further conditioning of the sludge for dewatering. BioCycle-D provides VS destruction, whereby the amount of biomass to be disposed of is reduced.  

Energy Efficiency

BioCycle-D solutions deliver 50% or greater energy savings over a conventional approach to aerobic digestion. Decoupling aeration from mixing allows aeration to be designed for VS destruction only, not to keep the contents of the tank mixed. Concurrent operation of aeration and mixing allows for unmatched aeration turndown. The mixing system operates at a fraction of the cost of aeration blowers.

Straightforward Operation

The ability to mix and aerate below the grid eliminates dead zones in cone-bottom tanks. Through instrument feedback, the BioCycle-D controller automatically transitions the cycles from aerobic for VS destruction to anoxic/anaerobic for facilitating denitrification, alkalinity recovery, and energy savings. By using online process instrumentation to adjust the aerobic and anoxic cycle durations based on real-time demands, operator attention is reduced.

Unparalleled Flexibility

BioMix Compressed Gas Mixing nozzles and headers are compatible with any tank geometry or configuration, and circular headers conform to the slope of the tank floor. BioCycle-D is able to accommodate a variety of sludge treatment requirements — such as parallel vs. series operation vs. options for single tank.