Sewage Treatment - STP Efficiency
Compare STP effluent water-quality readings against MEPC.227(64) limits - BOD, TSS, fecal coliform, pH.
Compliance
Compliant
Formula, assumptions, and limits
MEPC.227(64) revised sewage-treatment limits for new installations from 2010. USCG 33 CFR 159 parallel. Passenger ships must meet tighter nutrients (N, P) limits.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Biochemical oxygen demand | mg/L | STP sample | |
| Total suspended solids | mg/L | STP sample | |
| Fecal coliform | MPN/100 mL | lab analysis |