Hamworthy Sewage Treatment Plant – Typical Specifications

Manufacturer

• Hamworthy (now part of Wärtsilä Water Systems)

• Used widely on ships, offshore rigs, FPSOs, and platforms

Main Function

The system treats sewage to remove:

• Suspended solids

• Organic matter

• Bacteria

• Odor

before discharging treated water overboard.

Typical Treatment Process

1️⃣ Collection Tank
Wastewater from toilets and drains enters the plant.

2️⃣ Biological Treatment (Aeration)
Air is injected to allow bacteria to break down organic waste.

3️⃣ Settling Tank
Solid sludge settles at the bottom.

4️⃣ Disinfection
Chlorination or UV treatment kills bacteria.

5️⃣ Discharge
Clean effluent is discharged to sea.