Numerical Experiments on the Effect and Its Seasonality of Seasonal Operation of a Sewage Treatment Plant in Hiro Bay

Key Points

• This research aims to evaluate the effectiveness and seasonality of seasonal operations of a sewage treatment plant.
• Conducted numerical experiments based on the Hiro Bay case study.
• Focused on water quality changes during the operation period from October to March.
• Assessed the impact on nutrient concentration and phytoplankton growth.
• Nutrient concentrations increased by about 10% during the operational period.
• The effect on phytoplankton concentration was less significant, limited by rapid seawater exchange.
• The most effective operational period was suggested to be from October to January.