Treatment of domestic wastewater by flocculating algal-bacterial system

This paper describes the feasibility of developing the flocculating algal-bacterial system under (natural) sunlight. The results clearly show that this is possible, and that the optimum biomass remains in the range of 1400-1600 mg/1 and the removal efficiencies are 83 per cent for COD, 72 per cent for total N and 88 per cent for total P. Additionally the settling properties of the biomass are as good as those of a sludge from well-run activated sludge process.