Marine Biological Treatment Plant

WCMBR-20 Marine Biological Sewage Treatment Plant: Advanced Onboard Wastewater Management

The WCMBR-20 Marine Biological Treatment Plant is a cutting-edge solution designed to effectively treat sewage from ship toilets, ensuring compliance with stringent international effluent discharge standards. This versatile system is not only suitable for treating black water but also excels in sterilizing grey water onboard ships. By employing a combination of traditional aeration, contact oxidization biochemical treatment, and chlorine disinfection, utilizing activated sludge and a soft stuffing medium, the WCMBR-20 addresses common challenges in marine sewage treatment, such as nitration issues and sludge expansion caused by thread-like bacteria, often referred to as the “cancer” in traditional continuous aeration treatment plants.

This marine sewage treatment system adheres to the rigorous specifications outlined in the National Standard GB10833-89 “Marine Sewage Treatment System Specification” and meets the discharge standard requirements of IMO MEPC 2(VI). Additionally, it has been certified with a Type Approval Certificate from CCS (China Classification Society) and received recognition through an IMO circular, ensuring its reliability and compliance on a global scale.

Working Principle:

The WCMBR-20 unit comprises four key components: an aeration tank, a contact oxidizing tank, a sediment tank, and a disinfection tank. In the initial aeration tank stage, aerobic bacteria-rich activated sludge forms sticky flocs to absorb organic substances, breaking them down into carbon dioxide and water while generating new activated sludge. The second stage, featuring a contact oxidizing compartment with soft film stuffing, further digests organic matter. The accumulated active sludge sediment in the sediment tank is returned to the aeration tank for seed reproduction and re-treatment. Subsequently, the clear liquid is directed to the chlorination tank, where chlorine eliminates any remaining bacteria, resulting in harmless liquid that is safely discharged overboard by a discharge pump.

Technical Specifications:

• Model: WCMBR-20
• Suitable for: Up to 20 people
• Treatment Load: 1.54 tons/day
• Organic Load: 0.77 kg/day
• Installation Dimensions: 1600mm (L) x 1200mm (W) x 1921mm (H)
• Discharge Standards:
  • BOD5 ≤ 25mg/l
  • COD ≤ 125mg/l
  • TSS ≤ [Specify value] mg/l
  • Coli group ≤ 100 pcs/100ml
• Ultrafiltration: Advanced anti-soil ultrafiltration membrane
• Back Flushing Water Pressure: 0.1-0.25 Mpa
• Power Supply Options:
  • 3Phase/AC380V/50HZ
  • 3Phase/AC440V/600HZ
  • 220V/50HZ
  • 3Phase AC415V/50HZ
• Control Modes: Automatic/Manual

Frequently Asked Questions (FAQs):

1. Q: How does the WCMBR-20 ensure compliance with international sewage discharge standards?
   • A: The WCMBR-20 adheres to the National Standard GB10833-89 and meets IMO MEPC 2(VI) discharge standards, ensuring treated effluent is safe for discharge overboard.
2. Q: Can the WCMBR-20 treat both black water and grey water on ships?
   • A: Yes, the WCMBR-20 is designed to effectively treat sewage from ship toilets (black water) and can also sterilize grey water onboard.
3. Q: What makes the WCMBR-20 different from traditional marine sewage treatment systems?
   • A: The WCMBR-20 utilizes a unique combination of aeration, contact oxidization, and chlorine disinfection, addressing common issues like nitration and sludge expansion, providing a more efficient and reliable solution.
4. Q: What are the power supply options for the WCMBR-20?
   • A: The WCMBR-20 offers multiple power supply options, including 3Phase/AC380V/50HZ, 3Phase/AC440V/600HZ, 220V/50HZ, and 3Phase AC415V/50HZ, ensuring compatibility with various shipboard electrical systems.
5. Q: How does the ultrafiltration membrane in the WCMBR-20 enhance treatment efficiency?
   • A: The advanced anti-soil ultrafiltration membrane ensures thorough filtration, removing even the smallest particles and contaminants, resulting in cleaner and safer treated water.