MIL-HDBK-1005/16
Table 5
Typical Ship Sewage Concentrations
Concentration
Characteristic
(mg/L)
Total suspended solids
600
Total dissolved solids
20,000
11,000
Sulfates
1,500
Sodium
6,200
Other dissolved solids
1,300
Biochemical oxygen demand (BOD)
400
3.3.3.4
Effect of Wastewaters with High Seawater Content.
a)
Performance. High concentrations of seawater tend
to inhibit biological treatment. Process inhibition is related
to the chloride concentration of the wastewater.
(1) For new designs, in the absence of pilot
plant data or treatment data from similar wastewaters, compensate
for high seawater content according to the data presented in
Table 6.
(2) In analyzing the capacity of existing
treatment facilities to receive ship's wastewater, use figures as
determined in Table 6. If these indicate overloading solely
because of chloride inhibition, conduct pilot plant tests before
planning any expansion.
(3) Sudden changes in chloride concentration may
upset biological processes. Consider equalization storage to
limit chloride variation at the wastewater facility to 200 mg/L/h
at chloride concentrations in excess of 5,000 mg/L.
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