Organic Waste Recycling

364 Organic waste recycling: technology and management

Total phosphorus

Nutrient content of plants, dry weight, (%) Total Kjedahl nitrogen

Hyacinth cover (%) 100 100

Organic loading rate (kg/ha-day) 5.2

Hydraulic residence time (days) ~3 0.63

Hydraulic loading rate, (m

3 /ha-day)

430 1220

Depth of hyacinth ponds (m) 1.23 1.4

Surface area of hyacinth ponds (ha) 1.4 0.76

Types of pre-treatment Excess activated sludge lagoons overflow to hyacinth ponds Trickling filter and activated sludge with polishing pond

Table 7.9 Summary of design and performance characteristics Location Austin- Hornsby Bend, Tex.: University of Florida, Gainseville,Fla

of aquatic weed wastewater treatment systems (continued)

aBased on effluent flow rate From O’Brien

(^1981

); re

produced b

yp

ermission of the American Societ

y of Civil En

gineers