Organic Waste Recycling

240 Organic waste recycling: technology and management

Figure 5.9 Algal yield (Pa) as a function of total solar irradiance (I 0 ) according to
Equation 5.5 (adapted from Goldman 1979b; reproduced by permission of Pergamon
Books Ltd)

Table 5.8 Summary of light saturation intensities (Is) for different freshwater and marine
micro algae (adapted from Goldman 1979b)

Is

Species Temperature

(oC)

Illuminance

(ft-candle)

Irradiance

(gcal/(cm^2 -day))

Fresh water -

Chlorella pyrenoidosa 25 51.8

25 500 36

26 - 82.1

Chlorella vulgaris 25 250 18

Scenedesmus obliquus 25 500 36

Chlamydomonas reinhardti 25 500 36

Chlorella- (7-11-05) 39 1400 100.8

Marine

Green algae 20 500 36

Diatoms 20 1000 72

Dinoflagellates 20 2500 180

Phaeodactylum tricornutum 18 - 82.1

Total sunlight irradiance (IO), g – cal / (cm^2 -day)

Algal Yield (P), g (dry wt) / (m

2 – day)