Oystra Mobile Septage Treatment System (MSTS)


  • Descriptive Overview
    The Oystra Mobile Septage Treatment System (MSTS) is a new sanitation system that processes human fecal sludge into non-potable water for agricultural or industrial use or safe discharge. Oystra is a truck-mounted dewatering system for use in areas like dense urban settlements where poor sanitation poses the greatest risks to human health. The latest generation prototype will be more cost effective, transportable, and easier to maneuver in crowded informal settlements than traditional septage collection methods.
  • Key Features
    • Makes septic tank emptying and treatment safer and less expensive
    • Pre-processes the septage from pit latrines or septic tanks to discharge clean, safe water
    • Results in reduced solids volume to transport to treatment, therefore reducing transport cost
  • Use Case Details
    Pit and tank emptiers: Designed to be used by pit/tank emptiers who collect and transport septage from containment sites to treatment facilities.
  • Dimensions (meters)
    H 3.2m x W 2.2m x L 4.5m (processor); H 2.8m x W 2.4m x L 9.4m (with truck)
  • Regularly Scheduled Required Maintenance
    Filters to be replaced every 6-12 months, daily cleaning after shift
  • Use Cases
    • Pit and Tank Emptier
  • Interface Type
  • Frontend Description
    Truck-mounted septic tank emptying system
  • Flush Water Source
  • Type of Waste Treated
    Combined Stream (solids and liquids)
  • Core Processing Technology
    Membrane Filtration
  • Processing Overview
    Raw septage is dewatered and wastewater is treated via membrane filtration. Water is discharged on-site as pathogen free. Dewatered solids are taken to a treatment plant for disposal.
  • Processing Capacity
    3 L/s
  • Processing Parameters
    50-80% of intake volume discharged as safe industrial or agricultural water
  • Consumable Chemicals Needed
    No chemicals needed. Diesel fuel is required for the generator.
  • Power Systems Overview
    Currently powered by truck-mounted diesel generator (<60kW steady state)
  • Capital Expense Estimate Notes
    Capital expense not available at this time
  • Expected Design Lifetime (Years)
  • Currently in Active Development
  • Commercialization Status
    In Development
  • Commercialization Activities
    The initial Oystra Mobile Septage Treatment System (MSTS) prototype was built in 2016 and tested in the US in 2017. The second generation prototype is complete and field testing begain in October 2018. Crane is seeing partners for real-world prototype testing.
  • Intellectual Property Status
    Patent Pending
  • Intellectual Property Details
    Patent applications filed for integrated system
  • Nutrient Reuse
    Effluent can be used as agricultural water
  • Liquid Emission Characteristics
    Complete pathogen removal has been confirmed.
  • Technology Development Milestones
  • Second Generation Prototype Stage
    TRL: 5 (2016)
    The Crane Engineering Oystra Mobile Septage Treatment System (MSTS) is currently TRL 5. In 2016, Crane built the initial MSTS prototype and tested in the United States in 2017. The second generation prototype is complete and began field testing in October 2018.
  • Linked Enabling Components
  • None linked
  • Linked Processing Technologies
  • None linked
Patent Number Description Link
Patent Pending Patent applications filed for integrated system. Patent application numbers: 62/754,218 and 62/794,878 Link