A Study on the Treatment of Bean Products Wastewater with Photosynthetic Bacteria

The conditions of the technology, under which bean products wastewater had been treated with photosynthetic bacteria, were studied. The environmental conditions, such as illumination or darkness, aerobic or anaerobic environment, consistency and pH of the wastewater, quantity of inoculation and different pretreatments of the wastewater, which affected the results of the treatment, were discussed. The results showed: the optimum conditions for the photosynthetic bacteria to remove organic substances were middle pH, 25～30℃ of temperature, aerobic environment and illumination. The removal rate of COD from the wastewater with a COD consistency of 25 820 mg/L after treatment for 96 hours reached 98.7%.