Process and assembly for the treatment of waste water on ships

Details Process and assembly for the treatment of waste water on ships Process and assembly for the treatment of waste water on ships

2007-06-26

2007-06-26

Prince, Fred G. (Department: 1724)

Liquid purification or separation

Processes

Treatment by living organism

C210S630000, C210S903000

Reexamination Certificate

active

10974373

ABSTRACT:
Process for treating waste water on ships in which the waste water is pretreated by surface filtration, the pretreated waste water being collected in a first tank acting as a mixing tank and optionally enriched with oxygen. The waste water from the first tank is continuously fed to a three stage bioreactor, in which aerobic waste water treatment takes place in a second tank, waste water is fed in batches from a second tank to a third sealed tank, in which denitrification and sedimentation of the solids takes place. Water from the third tank is fed into a fourth tank acting as a settling tank with the largest part of the sludge being recirculated in batches from the third tank into the first tank and, after disinfection, the water from the fourth tank is subjected to fine filtration.

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