MIL-HDBK-1005/16
Table 6
Chloride Inhibition of Biological Nitrification
Maximum Chloride
Concentration for
Concentration for
Chlorides in Excess of
Process
No Inhibition
Maximum Level (1)
Trickling filters
5,000 mg/L
Referring to
and rotating
appropriate design
loading curve, decrease
contactors
loading an amount
corresponding to one
percentage point of
removal efficiency per
1,000 mg/L of chlorides
in excess of 5,000 mg/L
Activated sludge
5,000 mg/L
Decrease loading by
2% per 1,000 mg/L
chlorides in excess
of 5,000 mg/L
Aerobic and
8,000 mg/L
Increase detention time
facultative lagoons
by 2% per 1,000 mg/L
chlorides in excess of
8,000 mg/L
(1) Highest average chloride concentration expected over
24 hours.
b)
Maintenance. High seawater content in wastewater
will aggravate incrustation problems. Avoid fine bubble air
diffusion systems, and design orifices in trickling filter flow
distributors or in aeration devices to facilitate periodic
cleaning of mineral deposits. Use care in selecting construction
and equipment materials.
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