The inner and outer channels of the oxidation ditch played two bioreactor functions, which would benefit enhancing pollutant removal in the inner channel and maintaining the effluent quality in the outer channel.
The results of monitoring indicated that the solar radiation intensity had a peak value at noon, but its maximum value changed with season and weather.
To ensure that the power output of the PV system without storage battery is sufficient in all different weather conditions of the year, a 95% confidence interval of solar radiation intensity is required.
In this study, the solar radiation intensity at 95% confidence interval was 78 W/m2.
The step power output mode can utilize the solar energy as well as possible for the PV system without batteries.