L1 /
6
CH3041
LAGOON TREATMENT
• Tertiary treatment uses chemicals to remove the remaining colloidal organics (which give residual BOD), the nitrates and phosphates, dissolved organics (pesticides) & heavy metals + disinfection of pathogens.
• Biological processing is often used.
Werribee 10850 Ha land filtration 35% Melbourne sewage
flood to 100mm, rapid grass growth 21 d cycle
October - April runs 15000 cattle, 30000 sheep.
