A dynamic model of the high-rate algal-bacterial wastewater treatment pond

Abstract A mathematical model is presented to describe the symbiotic growth of algae and bacteria in a high-rate wastewater treatment pond. Good agreement with available experimental results is demonstrated. The variation of process parameters (pH, DO and substrate concentration) with channel length and time of day is illustrated for a recirculated pond of “race-track” design. The influence of operating conditions on the algal yield obtainable is evaluated.