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Reducing biofouling in membrane bior...

Zhang, Kai.

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Reducing biofouling in membrane bioreactors treating synthetic Early Planetary Base wastewater.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Reducing biofouling in membrane bioreactors treating synthetic Early Planetary Base wastewater./
作者:	Zhang, Kai.
面頁冊數:	228 p.
附註:	Adviser: Daniel B. Oerther.
Contained By:	Dissertation Abstracts International68-12B.
標題:	Engineering, Environmental. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3295384
ISBN:	9780549404095

Reducing biofouling in membrane bioreactors treating synthetic Early Planetary Base wastewater.
Zhang, Kai.

Reducing biofouling in membrane bioreactors treating synthetic Early Planetary Base wastewater. - 228 p.

Adviser: Daniel B. Oerther.

Thesis (Ph.D.)--University of Cincinnati, 2007.

Membrane bioreactors (MBRs) are promising technology for ground based wastewater treatment. Recently, MBRs are also being considered to be used as a component in the integrated water recovery system for long duration manned space missions. For long term manned space travel, the major operational problem for MBRs is membrane biofouling. The current research studied the influence of MBR loading/decanting patterns on membrane biofouling. The central hypothesis of this study was: MBR loading/decanting patterns could lead to different sludge properties resulting in different level of membrane biofouling. To test the central hypothesis, experiments covered the following aspects of MBRs treating synthetic Early Planetary Base Wastewater (EPBW) were carried out: (1) organic removal and nitrification performance; (2) influence of MBR loading/decanting patterns (continuous mode vs. batch mode) on sludge properties; (3) influence of MBR loading/decanting patterns on microbial community structure of the planktonic biomass; (4) influence of MBR loading/decanting patterns on membrane filtration characteristics; and (5) the potential pioneer species that could attach to membrane surface in cross-flow microfiltration.

ISBN: 9780549404095Subjects--Topical Terms:

783782
Engineering, Environmental.

Reducing biofouling in membrane bioreactors treating synthetic Early Planetary Base wastewater.
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245 1 0 $a Reducing biofouling in membrane bioreactors treating synthetic Early Planetary Base wastewater.
300 $a 228 p.
500 $a Adviser: Daniel B. Oerther.
500 $a Source: Dissertation Abstracts International, Volume: 68-12, Section: B, page: 8304.
502 $a Thesis (Ph.D.)--University of Cincinnati, 2007.
520 $a Membrane bioreactors (MBRs) are promising technology for ground based wastewater treatment. Recently, MBRs are also being considered to be used as a component in the integrated water recovery system for long duration manned space missions. For long term manned space travel, the major operational problem for MBRs is membrane biofouling. The current research studied the influence of MBR loading/decanting patterns on membrane biofouling. The central hypothesis of this study was: MBR loading/decanting patterns could lead to different sludge properties resulting in different level of membrane biofouling. To test the central hypothesis, experiments covered the following aspects of MBRs treating synthetic Early Planetary Base Wastewater (EPBW) were carried out: (1) organic removal and nitrification performance; (2) influence of MBR loading/decanting patterns (continuous mode vs. batch mode) on sludge properties; (3) influence of MBR loading/decanting patterns on microbial community structure of the planktonic biomass; (4) influence of MBR loading/decanting patterns on membrane filtration characteristics; and (5) the potential pioneer species that could attach to membrane surface in cross-flow microfiltration.
520 $a The results of this study suggested that (1) MBRs is a promising process as the preliminary treatment of the synthetic EPBW by showing excellent organic removal and nitrification; (2) MBR loading/decanting patterns impact the chemical/physical properties as well as the microbial community structure of the planktonic (suspended) biomass. Particularly, the physical/chemical properties of the sludge in the MBR with batch mode could result in less membrane fouling; (3) Sludge in the MBR with batch loading/decanting correlated with less membrane fouling in both cross-flow and submerged filtrations; and (4) Specific microbial populations could be pioneers that firmly attach to microfiltration membranes at the initial stage of membrane biofouling.
520 $a The findings of the current study provided novel information on the treatment of EPBW by using MBR technology that could also be used for the design and operation of MBRs for ground-based high strength wastewater treatment. More importantly, the results of this research suggested that the loading/decanting operation of the bioreactor components of MBRs could lead to different levels of membrane biofouling. Future design and operation of MBRs, for both long duration manned space mission and ground-based applications, should consider the operating condition of the bioreactor to further reduce the cost and enhance the stability of MBRs. As one of the early steps towards the mechanisms of membrane biofouling, molecular analysis suggested that specific microbial populations could be responsible for the initiation of membrane biofouling. This result could be an important connection between engineering and microbiological research for biofilm/biofouling formation.
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