Air and Water Recycling System Development for a Long Duration Lunar Base

2006 ◽  
Author(s):  
Harry Jones ◽  
Mark Kliss
Keyword(s):  
System Development ◽  
Water Recycling ◽  
Recycling System ◽  
Long Duration

scholarly journals Assessment of Membrane-Aerated Biological Reactors (MABRs) for Integration into Space-Based Water Recycling System Architectures

2020 ◽  
Vol 6 (2) ◽  
pp. 12-27 ◽  
Author(s):  
Dylan Christenson ◽  
Ritesh Sevanthi ◽  
Audra Morse ◽  
Andrew Jackson
Keyword(s):  
Biological Treatment ◽  
Waste Stream ◽  
Limiting Factor ◽  
Water Recycling ◽  
System Architectures ◽  
Recycling System ◽  
Long Duration ◽  
Conversion Rates ◽  
Sustained Operation ◽  
Recycling Systems

AbstractThis work investigates the suitability of membrane aerated biological reactors (MABRs) for biological treatment of a space-based waste stream consisting of urine, hygiene/grey water, and humidity condensate within an overall water recycling system. Water represents a critical limiting factor for human habitation and travel within space; thus, water recycling systems are essential. Biological treatment of wastewater provides a more efficient sustainable means of stabilizing the waste stream within water recycling system architectures in comparison to current chemical stabilization processes that utilize harsh chemicals, which represent both a hazardous and an unsustainable approach. To assess the capabilities of MABRs for providing microgravity compatible biological treatment and verify long duration operation and integration with desalination processes, two full-scale MABR systems were challenged with various loading rates and operational scenarios during sustained operation for over 1 year. The MABRs were able to maintain 196 g-C/m3-d and 194 g-N/m3-d volumetric conversion rates. Additionally the systems were able to handle intermittent loading and recover rapidly from system hibernation periods of up to 27 days. Overall, the use of MABRs within a wastewater treatment system architecture provides several potential benefits including minimizing the use of toxic chemical pretreatment solutions and providing an effluent solution that is easier to desalinate and dewater.

PVDF Emblem⁄Micro Filter Water Recycling System

2008 ◽  
Vol 62 (6) ◽  
pp. 700-703
Author(s):  
Makoto Matsushita ◽  
Yoshiharu Numata
Keyword(s):  
Water Recycling ◽  
Recycling System ◽  
Filter Water

Water recycling at the Millennium Dome

2001 ◽  
Vol 43 (10) ◽  
pp. 287-294 ◽  
Author(s):  
S. Hills ◽  
A. Smith ◽  
P. Hardy ◽  
R. Birks
Keyword(s):  
Large Scale ◽  
Pilot Scale ◽  
Water Recycling ◽  
Water Usage ◽  
Customer Perception ◽  
Recycling System ◽  
Optimum Configuration ◽  
Treatment Technologies ◽  
System Information ◽  
System Water

Thames Water is working with the New Millennium Experience Company to provide a water recycling system for the Millennium Dome which will supply 500m3/d of reclaimed water for WC and urinal flushing. The system will treat water from three sources:rainwater - from the Dome roofgreywater - from handbasins in the toilet blocksgroundwater - from beneath the Dome site The treatment technologies will range from “natural” reedbeds for the rainwater, to more sophisticated options, including biological aerated filters and membranes for the greywater and groundwater. Pilot scale trials were used to design the optimum configuration. In addition to the recycling system, water efficient devices will be installed in three of the core toilet blocks as part of a programme of research into the effectiveness of conservation measures. Data on water usage and customer behaviour will be collected via a comprehensive metering system. Information from the Dome project on the economics and efficiency of on-site recycling at large scale and data on water efficient devices, customer perception and behaviour will be of great value to the water industry. For Thames Water, the project provides vital input to the development of future water resource strategies.

scholarly journals Small scale water recycling systems - risk assessment and modelling

2001 ◽  
Vol 43 (10) ◽  
pp. 83-90 ◽  
Author(s):  
C. Diaper ◽  
A. Dixon ◽  
D. Butler ◽  
A. Fewkes ◽  
S. A. Parsons ◽  
...  
Keyword(s):  
Risk Model ◽  
Simulation Modelling ◽  
Normal Operation ◽  
Small Scale ◽  
Water Recycling ◽  
Salmonella Spp ◽  
Pump Failure ◽  
Recycling System ◽  
Point Of Use ◽  
Health Related

This paper aims to use quantitative risk analysis, risk modelling and simulation modelling tools to assess the performance of a proprietary single house grey water recycling system. A preliminary Hazard and Operability study (HAZOP) identified the main hazards, both health related and economic, associated with installing the recycling system in a domestic environment. The health related consequences of system failure were associated with the presence of increased concentrations of micro-organisms at the point of use, due to failure of the disinfection system and/or the pump. The risk model was used to assess the increase in the probability of infection for a particular genus of micro-organism, Salmonella spp, during disinfection failure. The increase in the number of cases of infection above a base rate rose from 0.001% during normal operation, to 4% for a recycling system with no disinfection. The simulation model was used to examine the possible effects of pump failure. The model indicated that the anaerobic COD release rate in the system storage tank increases over time and dissolved oxygen decreases during this failure mode. These conditions are likely to result in odour problems.

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