Table 3: Physical-chemical results for dairy effluent before and after AOP treatment in a reaction time of 3 h.

Parameters Results Percentage In natura After AOP Actual color (Pt Co) 6523.5 3261.8 49.9 Turbidity (NTU) 2786 1919.6 31.1 pH 4.36 7.55 — Odor Pungent Odorless — COD (mg L−1 O2) 6032.5 4222.8 30 BOD5 (mg L−1 O2) 2218.7 1819.3 18 BOD5/COD 0.368 0.431 — TOC (mg L−1) 1010 692.9 31.4 Phosphorus (mg L−1) 208.5 156.4 25 N-NH3 (mg L−1) 158.4 126.7 20 N-organic (mg L−1) 180.1 144.1 19.9 ST (mg L−1) 10720 5896 55 Oil and grease (mg L−1) 2002.1 801 60 Chlorine (mg L−1) 793.5 536.7 32.4 Iron (mg L−1) 91.53 61.8 32.5 Zinc (mg L−1) 5.0 5.0 —