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D Series Marine Wastewater Treatment System

Reliable, Compact Treatment for Demanding Marine Environments

The D Series from SciencoFAST sets the standard for reliable, compact, and efficient marine wastewater treatment. Designed specifically for vessels requiring IMO and USCG-compliant solutions, these systems deliver robust performance in the most demanding maritime environments.

Engineered for ease of installation, low maintenance, and long-term durability, the D Series ensures your vessel stays environmentally compliant without compromising operational efficiency.

Why Choose the D Series?

Marine environments demand treatment systems that are durable, compliant, and easy to operate. The D Series delivers all of that and more, providing reliable onboard wastewater treatment without disrupting vessel operations.

Proven Biological Treatment

Efficient fixed-film media supports strong bacterial activity for consistent, high‑quality wastewater processing.

Built for Marine Conditions

Engineered to perform in harsh, variable environments while maintaining compliance with IMO and USCG standards.

Compact, Space‑Saving Installation

A modular footprint makes the D Series ideal for vessels with limited room, offering simple integration into existing layouts.

Low Maintenance Operation

Minimal moving parts and a self-regulating control system reduce operator workload and keep maintenance needs manageable.

How It Works

The D Series uses a smart biological process to treat wastewater right on board your vessel.

  • Effective bacteria grow on specialized media and breaks down waste as it flows through the tank
  • Powerful blower system keeps the tank oxygenated facilitating a robust bacteria for waste breakdown
  • Results: clean water that is safe to discharge

Key Features

Reliable performance
proven Marine/FAST D Series ensures consistent and effective treatment in a wide range of operating conditions

Regulatory compliance
certified to meet or exceed IMO and USCG regulations for discharge standards

Compact and Modular Design
ideal for tight spaces on board most vessels, easy to install

Low Maintenance
with fewer moving parts and self-regulating with a control panel reduces operator intervention

Models & Capacities

Choose the right size for your needs:

Model Number – all units other than MEPC D-1 D-2 D-3 D-4 D-5 D-6 D-7 D-8 D-9
Model Number – MEPC units only D-1M D-2M D-3M D-4M D-5M D-6M D-7M D-8M D-9M
Rated Capacity (Persons)
Blackwater only 39 70 105 131 157 263 383 514 771
Above plus showers and hand sinks 30 53 80 99 119 199 290 389 584
Above plus dishwashing and laundry 16 28 42 53 63 106 154 207 311
Above plus ground food waste 4 8 12 15 18 30 44 59 88
Rated Capacity gpd (m³/d) 970 (3.7) 1800 (6.8) 2700 (10) 3300 (13) 4000 (15) 6600 (25) 9800 (37) 13000 (49) 19500 (74)
Recommended max gpd (m³/d) 760 (2.9) 1300 (4.9) 2000 (7.6) 2600 (9.8) 3100 (12) 5200 (20) 7600 (29) 10200 (39) 15300 (58)

Applications

The D Series system is your trusted solution for on-board sewage treatment for:

Commercial

Military

Private

Slide-In™ Marine Sanitation Device (MSD)

Smarter Installation. Easier Service. Proven SciencoFAST Reliability.

The SciencoFAST MSD Slide-In™ is a next-generation Marine Sanitation Device (MSD) engineered specifically for vessels where every inch of space matters. Designed to mount directly into existing hull tanks using an integrated rail system, the MSD Slide-In simplifies installation, improves service accessibility, and delivers the trusted wastewater treatment performance SciencoFAST is known for worldwide. Whether for new vessel construction or retrofit applications with existing tanks, the MSD Slide-In provides a compact, efficient sanitation solution without compromising compliance or reliability.

Why Choose the MSD Slide-In?

Traditional marine sanitation systems can be difficult to install and maintain in tight equipment rooms. The MSD Slide-In solves that problem with an innovative slide-in rail platform that allows the unit to move easily into place and slide back out for inspection or service.

  • No vertical lifting.
  • No major equipment disassembly.

  • No wasted space.

Just smarter marine sanitation engineering.

How It Works

The MSD Slide-In mounts onto a durable rail platform installed within the vessel’s existing hull tank structure. During installation or maintenance, operators simply slide the unit forward along the rails for full access to key components and service areas.

MSD SLIDE-IN MODELS & CAPACITIES

Slide-In Rail
System
Integrated rails allow the MSD to slide directly into existing hull tanks and slide back out for easy service access—ideal for vessels with limited mechanical space.

Simplified
Maintenance
Technicians can quickly access critical components without removing surrounding equipment, helping reduce downtime and maintenance costs.

Compact &
Efficient Design
Maximize available onboard space while maintaining the treatment performance required for modern marine sanitation systems.

Ideal for Retrofits &
New Builds
Perfect for older vessels with constrained equipment rooms as well as custom vessel designs where space optimization is essential

MSD SLIDE-IN APPLICATIONS

Designed for vessels with tight access and complex layouts, the MSD Slide-In is ideal when components
need to be separated and installed in challenging spaces.

Passenger vessels

Ferries

Workboats

Offshore vessels

Research vessels

Retrofit projects

Compact custom vessel designs

Compliance You Can Trust

The M Series and MSD Slide-in is built to meet demanding marine sanitation requirements and is
tested and certified to major industry standards, including:

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