| DOI: | 10.1016/j.watres.2017.12.043
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| Scopus记录号: | 2-s2.0-85040124018
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| 论文题名: | Biofilms, active substrata, and me |
| 作者: | Rittmann B.E.
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| 刊名: | Water Research
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| ISSN: | 431354
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| 出版年: | 2018
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| 卷: | 132 | | 起始页码: | 135
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| 结束页码: | 145
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| 语种: | 英语
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| 英文关键词: | Active substrata
; Anode respiration
; Biofilm
; Membrane biofilm
; Photobiocatalysis
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| Scopus关键词: | Anodes
; Bacteria
; Biodegradation
; Chromates
; Detoxification
; Free radical reactions
; Free radicals
; Inorganic compounds
; Organic pollutants
; Photocatalysis
; Reaction kinetics
; Selenium compounds
; Substrates
; Sustainable development
; Active substrata
; Anode-respiring bacteria
; Environmental services
; Gas transfer membranes
; Membrane biofilm reactor
; Oxidized contaminants
; Photobiocatalysis
; Recalcitrant organic pollutants
; Biofilms
; chromic acid
; hydrogen
; perchlorate
; selenate
; solvent
; biodegradation
; biofilm
; catalysis
; hydrogen
; membrane
; photolysis
; pollutant removal
; reaction kinetics
; respiration
; substrate
; water technology
; biofilm
; chemical reaction kinetics
; detoxification
; electron transport
; gas
; membrane transport
; nonhuman
; oxidation
; photocatalysis
; pollutant
; priority journal
; reduction (chemistry)
; Review
; solubility
; electrode
; metabolism
; oxidation reduction reaction
; water management
; water pollutant
; Biofilms
; Electrodes
; Hydrogen
; Oxidation-Reduction
; Water Pollutants
; Water Purification
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| 英文摘要: | Having worked with biofilms since the 1970s, I know that they are ubiquitous in nature, of great value in water technology, and scientifically fascinating. Biofilms are naturally able to remove BOD, transform N, generate methane, and biodegrade micropollutants. What I also discovered is that biofilms can do a lot more for us in terms of providing environmental services if we give them a bit of help. Here, I explore how we can use active substrata to enable our biofilm partners to provide particularly challenging environmental services. In particular, I delve into three examples in which an active substratum makes it possible for a biofilm to accomplish a task that otherwise seems impossible. The first example is the delivery of hydrogen gas (H2) as an electron donor to drive the reduction and detoxification of the rising number of oxidized contaminant: e.g., perchlorate, selenate, chromate, chlorinated solvents, and more. The active substratum is a gas-transfer membrane that delivers H2 directly to the biofilm in a membrane biofilm reactor (MBfR), which makes it possible to deliver a low-solubility gaseous substrate with 100% efficiency. The second example is the biofilm anode of a microbial electrochemical cell (MxC). Here, the anode is the electron acceptor for anode-respiring bacteria, which “liberate” electrons from organic compounds and send them ultimately to a cathode, where we can harvest valuable products or services. The anode's potential is a sensitive tool for managing the microbial ecology and reaction kinetics of the biofilm anode. The third example is intimately coupled photobiocatalysis (ICPB), in which we use photocatalysis to enable the biodegradation of intrinsically recalcitrant organic pollutants. Photocatalysis transforms the recalcitrant organics just enough so that the products are rapidly biodegradable substrates for bacteria in a nearby biofilm. The macroporous substratum, which houses the photocatalyst on its exterior, actively provides donor substrate and protects the biofilm from UV light and free radicals in its interior. These three well-developed topics illustrate how and why an active substratum expands the scope of what biofilms can do to enhance water sustainability. © 2017 Elsevier Ltd |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/112991
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ 85287-5701, United States
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| Recommended Citation: | |
Rittmann B.E.. Biofilms, active substrata, and me[J]. Water Research,2018-01-01,132
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