Bruce E. Rittmann

Arizona State University

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Rosa Krajmalnik‐Brown

Arizona State University

Chen Zhou

Nanjing University

Yongming Zhang

Shanghai Normal University

César I. Torres

Arizona State University

Prathap Parameswaran

Kansas State University

Yihao Luo

Northeast Normal University

Aura Ontiveros‐Valencia

Institute for Scientific and Technological Research

Andrew K. Marcus

Arizona State University

Youneng Tang

Florida A&M University - Florida State University College of Engineering

Hyung‐Sool Lee

University of Waterloo

Cooperative Institutions

Arizona State University

303

John Wiley & Sons (United States)

248

Bioengineering Center

233

National Center for Genetic Engineering and Biotechnology

220

Hudson Institute

162

Chinese Academy of Sciences

126

Digital Video (Italy)

Shanghai Normal University

Northwestern University

University of Illinois Urbana-Champaign

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Influence of substrate c/n ratio on the structure of multi-species biofilms consisting of nitrifiers and heterotrophs

Water Science & Technology (1995)

Akiyoshi Ohashi D. G. Viraj de Silva Bruce Mobarry Jacques Manem David A. Stahl

A bench-scale biological aerated filter (BAF) was operated under a range of substrate loadings and C/N influent ratios. Start-up with a substrate loading of 4.8 COD kg m −3 d −1 and an influent C/N ratio of 1.5 gave no nitrification, due to the high biofilm detachment rate caused by the daily backwashing. Subsequent runs with lower substrate loadings and backwashing rates allowed stable nitrification. A final run with the initial substrate loading and backwash rate gave stable nitrification. Oligonucleotide probes targeted to the 16S rRNA of the nitrifiers, as well as to other types of microorganisms, were used to characterize how the changes in loading and detachment affected the microbial structure in the biofilms. The proportion of nitrifiers decreased with increasing C/N ratio. The biofilm remaining after backwashing also contained a higher fraction of nitrifiers than did the backwash solids stripped from the outer layers of biofilm, which consisted mainly of active heterotrophs. Thus, stable nitrification was possible only when the nitrifiers became established deeper inside the biofilm.

10.1016/0273-1223(96)00010-8

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Citations (111)

Microbial removal of hazardous organic compounds

Environmental Science & Technology (1982)

Hester Kobayashi Bruce E. Rittmann

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrobial removal of hazardous organic compoundsHester Kobayashi and Bruce E. RittmannCite this: Environ. Sci. Technol. 1982, 16, 3, 170A–183APublication Date (Print):March 1, 1982Publication History Published online23 September 2008Published inissue 1 March 1982https://pubs.acs.org/doi/10.1021/es00097a002https://doi.org/10.1021/es00097a002research-articleACS PublicationsRequest reuse permissionsArticle Views975Altmetric-Citations255LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

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10.1021/es00097a002

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Citations (365)

How Rhodococcus ruber accelerated denitrification with soybean-processing wastewater as the electron donor

Journal of Environmental Management (2025)

Haiyun Zhang Yue Ma Fei Liu Songyun Chen Peng Xu

10.1016/j.jenvman.2025.124558

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Hydrodefluorination of Perfluorooctanoic Acid in the H₂-Based Membrane Catalyst-Film Reactor with Platinum Group Metal Nanoparticles: Pathways and Optimal Conditions

Environmental Science & Technology (2021)

Min Long Welman C. Elias Kimberly N. Heck Yihao Luo YenJung Sean Lai

PFAAs (perfluorinated alkyl acids) have become a concern because of their widespread pollution and persistence. A previous study introduced a novel approach for removing and hydrodefluorinating perfluorooctanoic acid (PFOA) using palladium nanoparticles (Pd0NPs) in situ synthesized on H2-gas-transfer membranes. This work focuses on the products, pathways, and optimal catalyst conditions. Kinetic tests tracking PFOA removal, F– release, and hydrodefluorination intermediates documented that PFOA was hydrodefluorinated by a mixture of parallel and stepwise reactions on the Pd0NP surfaces. Slow desorption of defluorination products lowered the catalyst's activity for hydrodefluorination. Of the platinum group metals studied, Pd was overall superior to Pt, Rh, and Ru for hydrodefluorinating PFOA. pH had a strong influence on performance: PFOA was more strongly adsorbed at higher pH, but lower pH promoted defluorination. A membrane catalyst-film reactor (MCfR), containing an optimum loading of 1.2 g/m2 Pd0 for a total Pd amount of 22 mg, removed 3 mg/L PFOA during continuous flow for 90 days, and the removal flux was as high as 4 mg PFOA/m2/d at a steady state. The EPA health advisory level (70 ng/L) also was achieved over the 90 days with the influent PFOA at an environmentally relevant concentration of 500 ng/L. The results document a sustainable catalytic method for the detoxification of PFOA-contaminated water.

Perfluorooctanoic acid

Human decontamination

10.1021/acs.est.1c06528

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Citations (27)

Biological conversion of sulfisoxazole in an autotrophic hydrogen-based membrane biofilm reactor

Journal of Water Process Engineering (2022)

Lin Yang Si Pang Jingzhou Zhou Chengyang Wu Xiaodi Li

Electron acceptor

Sulfisoxazole

10.1016/j.jwpe.2022.103396

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Citations (8)

Letters. Authors' response to comments on "More on microorganisms"

Environmental Science & Technology (1982)

Bruce E. Rittmann Hester Kobayashi

10.1021/es00102a617

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Citations (1)

Out of the Lab, Into the Frying Pan: Understanding the Effect of Natural Groundwater Conditions on Bio-Based Ground Improvement Strategies

Caitlyn Hall Bruce E. Rittmann Leon A. van Paassen Edward Kavazanjian

<p>We are developing a biogeochemical model for microbial denitrification-driven ground improvement to account for t the complexities expected in the field, including microbial inhibition and competition. We will use this model to support Microbially Induced Desaturation and Precipitation (MIDP) via denitrification as a bio-based ground improvement strategy alternative considering different treatment recipes and natural groundwater composition. Current ground improvement techniques have limited utility underneath or near existing structures. Developing alternatives is becoming increasingly important as urbanization increases. Large, centralized populations and infrastructure are more vulnerable to threats by natural disasters and geologic hazards such as earthquake-induced liquefaction and flooding. Bio-based ground stabilization techniques may be less disruptive to deploy and monitor, allowing application underneath existing structures. MIDP is a two-stage ground-improvement process in which biogenic gas desaturation provides immediate improvement while calcium carbonate precipitation provides long term stability. MIDP influences the geochemical environment and the hydro-mechanical behavior of soils through biogenic gas production, precipitation of calcium carbonate, and biomass growth. All three components alter the biogeochemical environment and subsurface permeability, thereby affecting the transport of substrates and subsequent product formation. The products of MIDP mitigate liquefaction at the lab-scale. MIDP experimentation and modeling have primarily considered only the use of de-ionized water and simplified water composition. However, denitrifying microorganisms compete with alternative electron acceptors, like sulfate and iron, and are influenced by the environment&#8217;s pH and salinity which may impede the MIDP treatment. Our biogeochemical model can predict the products and by-products of MIDP treatment considering realistic groundwater conditions. The results of this model will be used to develop comprehensive treatment plans for upcoming field trials to demonstrate treatment effectiveness and develop best practices for future application.</p>

Biogeochemical Cycle

10.5194/egusphere-egu2020-11378

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Biofilm Growth and Mineral Precipitation in Synthetic Leachate Columns

Journal of Geotechnical and Geoenvironmental Engineering (2001)

Andrew Cooke R. Kerry Rowe Bruce E. Rittmann Jamie F. VanGulck S. Millward

The results of a numerical model developed to describe the clogging of the leachate collection systems are compared with data from column experiments conducted with synthetic landfill leachate. A biofilm kinetic model is used to calculate the utilization of organic substrates (acetate and propionate) and growth of active clog material, and the substrate removal is then linked to mineral precipitation. Calculated changes in the chemical oxygen demand and Ca2+ of the effluent leachate and the porosity profiles along the length of the column show encouraging agreement with measured values. Means to obtain reasonable parameter values are presented. The favorable outcome represents completion of an essential first step toward being able to predict what controls clogging in landfill leachate collection systems.

Clogging

10.1061/(asce)1090-0241(2001)127:10(849)

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Citations (45)

生物膜の損失速度に及ぼす剪断応力の影響(Biotechnology and Bioengineering,24,1982)

用水と廃水 (1983)

Bruce E. Rittmann 敦子山根

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Impacts of moisture content during ozonation of soils containing residual petroleum

Journal of Hazardous Materials (2017)

Tengfei Chen Burcu M. Yavuz Anca G. Delgado Garrett Montoya Delaney Van Winkle

Oxidizing agent

10.1016/j.jhazmat.2017.11.060

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Citations (16)