Biofilm Monitoring Articles

  • A framework for good biofilm reactor modeling practice (GBRMP)

    A researcher or practitioner can employ a biofilm model to gain insight into what controls the performance of a biofilm process and for optimizing its performance. While a wide range of biofilm-modeling platforms is available, a good strategy is to choose the simplest model that includes sufficient components and processes to address the modeling goal. In most cases, a one-dimensional biofilm ...


    By IWA Publishing

  • Online biofilm monitoring by HydroBio® Advance in an open cooling water system

    Download our new case study (CS 134) and learn how HydroBio® Advance optimized the biocide programme and improves the full plant efficiency through: Control of microbiological status with online biofilm monitoring. Optimization of the biocide treatment. Successful deposit control and so clean system. ...


    By Kurita

  • Biofilm carrier migration model describes reactor performance

    The accuracy of a biofilm reactor model depends on the extent to which physical system conditions (particularly bulk-liquid hydrodynamics and their influence on biofilm dynamics) deviate from the ideal conditions upon which the model is based. It follows that an improved capacity to model a biofilm reactor does not necessarily rely on an improved biofilm model, but does rely on an improved ...


    By IWA Publishing

  • Stable and reliable ANAMMOX process provided by Mutag BioChip 25™ biofilm technology

    Since the demand for the so-called “ANAMMOX process” (ANaerobic AMMonium OXidation) is steadily growing within the sector of biological treatment of wastewater and sewage, a new and effective solution for maintaining the process stability is urgently required. A suchlike solution can be realized by means of a special biofilm carrier-based ...


    By Multi Umwelttechnologie AG

  • Predicting N2O emissions from nitrifying and denitrifying biofilms: a modeling study

    Wastewater treatment plants can be significant sources of nitrous oxide (N2O), a potent greenhouse gas. While our understanding of N2O emissions from suspended-growth processes has advanced significantly, less is known about emissions from biofilm processes. Biofilms may behave differently due to their substrate gradients and microbial stratification. In this study, we used mathematical ...


    By IWA Publishing

  • Modeling phototrophic biofilms in a plug-flow reactor

    The use of phototrophic biofilms in wastewater treatment has been recognized as a potential option for development of new reactor configurations. For better understanding of these systems, a numerical model was developed including relevant microbial processes. As a novelty, this model was implemented in COMSOL Multiphysics, a modern computational environment for complex dynamic models. A ...


    By IWA Publishing

  • BioSense a Biofilm Monitor and Controller

    Abstract Biofilms (slime) can form on virtually every nonshedding surface, in a nonsterile aqueous environment i.e. anywhere where a water source is present; such as cooling/heating systems, swimming areas and in drinking water purification. These Biofilms can cause a myriad of problems including; harbouring harmful bacteria such as Legionella, inducing corrosion, and reducing ...


    By Sensara, SL

  • Modelling ammonium-oxidizing population shifts in a biofilm reactor

    The dynamic reactor behaviour of a nitrifying inverse turbulent bed reactor, operated at varying loading rate, was described with a one-dimensional two-step nitrification biofilm model. In contrast with conventional biofilm models, this model includes the competition between two genetically different populations of ammonia-oxidizing bacteria (AOB), besides nitrite-oxidizing bacteria (NOB). ...


    By IWA Publishing

  • Experimental evaluation of the nitrite sensitivity coefficient in granular anammox biomass

    Nitrite is widely reported to inhibit anammox activity and growth. One modeling approach for nitrite impairment of anammox growth is the use of a nitrite sensitivity coefficient which increases the endogenous decay coefficient of anammox bacteria proportionally to nitrite concentration. The objective of this study was to measure nitrite concentration profiles within active anammox granules ...


    By IWA Publishing

  • The role of homoacetogenic bacteria as efficient hydrogen scavengers in microbial electrochemical cells (MXCs)

    We evaluated the consumption of hydrogen gas at the anode of a microbial electrolysis cell (MEC) and characterized the significance of new interactions between anode respiring bacteria (ARB) and homo-acetogens. We demonstrated the significance of biofilm limitation for direct consumption of H2 over acetate by ARB, using the deep biofilm model. Selective inhibition of the major competing hydrogen ...


    By IWA Publishing

  • Systematic evaluation of biofilm models for engineering practice: components and critical assumptions

    Biofilm models are valuable tools for the design and evaluation of biofilm-based processes despite several uncertainties including the dynamics and rate of biofilm detachment, concentration gradients external to the biofilm surface, and undefined biofilm reactor model calibration protocol. The present investigation serves to (1) systematically evaluate critical biofilm model assumptions and ...


    By IWA Publishing

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