Salinity Acclimation of Chlorella pynenoidosa and Its Application in Mariculture Wastewater Treatment

摘要

We attempted to evaluate the possibility of using Chlorella pynenoidosa to remove ammonia and COD from mariculture effluent through a series of experiments. The results showed that Chlorella pynenoidosa can depend on ammonia as necessary nutrient for growth after the process of domestication culture. High concentration ammonia has a toxic effect on Chlorella pynenoidosa. The higher the concentration, the stronger the effect is. The appropriate ammonia range is below 50mg/L. The best working condition of Chlorella pynenoidosa for ammonia removal is pH 7-9，temperature 25-30°C, algae delivery amount 8 × 10~5cell/mL. Further experiment results showed that the acclimated algae can reduce the ammonia concentration below 0.02mg/l in 7 days.