Table 2 Summary of PBR properties

Vertical Column

Spirulina platensi

1. Simple and cost effective design

2. Greater rate of mass transfer in bubble columns

1. Lack of control on irradiant light.

2. Wide fluctuations in productivity.

57, 58, 64

Flat Pannel

Spirulina platensi

1. Greater control of incident light.

2. Effective control of gas pressure.

1. Cost for production is high.

2. Complicated design and more maintenance

59, 61

Tubular

Arthrospira platensis,

Anabaena variabilis PK84,

Anabaena variabilis ATCC 29413,

Anabaena variabilis PK84

1. Flexibility in volume to surface area ratio.

2. Flexibility in shifting the place receiving light.

3. Give higher biomass with internal static mixture.

1. While provides flexibility to irradiant light

but creates pockets of poor mass transfer

2. Mixing time is longer in internal static mixture TPBR

42, 60, 61, 63, 65, 66