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Series 1

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.

Series 2

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

Factory-Tested. Field-Ready.

MarineFAST® Systems are commonly referred to as a Type II (two) MSD biological (aerobic digestion) treatment system. The Type II MSD systems are powerful, flow-through discharge devices and tested in conditions described in 33 CFR 159.121. MarineFAST® Marine Sewage Treatment Marine and offshore sewage treatment systems built to handle extreme environments. All MarineFAST® (Fixed Activated Sludge Treatment) units are fully certified by US Coast Guard under U.S. and IMO regulations.

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