Subsequently, a pre-determined volume of the organic fertilizer
medium was introduced into a photobioreactor with 5 L of tap
water (without sterilization) and the pH of the medium was adjusted
according to pre-determined values. Then, C. vulgaris with
initial cell concentration of 0.3 106 cells (around 10 mL from
the seed culture) was introduced into the photobioreactor. The
photobioreactor was aerated with compressed air continuously
and illuminated with cool-white fluorescent light (Philip TL-D
36W/865, light intensity of 60–70 lmol m2 s1).