Advantages and disadvantages of microporous membranes in a hollow fiber bioreactor for space applications

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Title: Advantages and disadvantages of microporous membranes in a hollow fiber bioreactor for space applications
Author: Ruiz Careri, Maria Noel
Abstract: Texas Tech University (TTU ) works in conjunction with NASA to develop a wastewater recovery system robust enough for use on long term -space missions . Biological treatment has been the primary focus at TTU , with specific thrusts in developing a biological treatment system that may be operated with minimal crew maintenance and low energy and mass requirements . Hollow fiber membrane bioreactors (HFMBRs ) may be used for biological wastewater treatment , and may be integrated with NASA’s current research developments . The goal of this research is to (a ) evaluate the effect of mass transfer by the use of microporous membranes and their application for microgravity conditions ; (b ) compare the effect of membrane type and configuration on treatment efficiency to previous literature values ; and (c ) determine the amount and distribution of biofilm growth within the reactor . Therefore , the objective of this research was accomplished using a microporous HFMBR . From the experimental studies performed for this thesis it was found that the HFMBR exhibits promising use in space applications . Maximum nitrification efficiency at low loading rates and high HRTs were accomplished using the HFMBR . Therefore , characteristics such as , suitable bioreactor size and the efficiency obtained during its operation , the HFMBR offer a potential for NASA’s needs ; nonetheless , developing a system with more favorable system hydrodynamics would aid to improve treatment efficiency in a HFMBR
URI: http : / /hdl .handle .net /2346 /1052
Date: 2005-08

Citation

Advantages and disadvantages of microporous membranes in a hollow fiber bioreactor for space applications. Master's thesis, Texas Tech University. Available electronically from http : / /hdl .handle .net /2346 /1052 .

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