422 Organic waste reuse and recycling: technology and management
Cz/Co = A.exp (-k.z/q0.5) (8.13)The total area required for slopes must be determined to complete the system
design. Total area required may be computed by the following equation:
Area = (Q) (z)/(q) (pd) (8.14)Where,
Area = total area of OF site, m^2
Q = design daily flow, m^3 /day
z = slope length, m
q = application rate, m^3 /(hr-m)
Pd = daily application period, hr/dayDesign values for Q, p and q should be selected to allow operating flexibility
during periods when parts of the system must be shut down for harvesting or
repairing.
Figure 8.9 BOD 5 fraction remaining versus distance down-slope; application rate study
with screened raw wastewater (Smith and Schroeder 1985)
Distance down slope (m)BODfraction remaining (C-5/C 5)o