Organic Waste Recycling

Algal production 261

z = ln Ii
Ca.Į
Where,
z = depth of HRAP, cm
Ii = measured light intensity = 10,000 ft-candle
Ca = algae density, mg/L
Į = specific light absorption coefficient = 1x10-3
Hydraulic retention time of HRAP = 5 days

b) If we want to increase the algal productivity of this HRAP to be twice of

that given in (a), suggest methods to achieve this objective and the

required dimension of the HRAP. Also suggest methods to re-use the

produced algal cells that would be acceptable to the public.