biofilm monitoring Articles | Environmental XPRT

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 heat ...

Feb. 21, 2014

By Sensara, SL

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. Improvement in cooling tower performance. Increase in control of operation. ...

Dec. 29, 2017

By Kurita

Effects of pipe materials on biofouling under controlled hydrodynamic conditions

Experiments were carried out to investigate pipe material impacts on biofouling, at high effluent concentration levels and under controlled hydrodynamic conditions. Two velocities (0.4 and 0.8 m s−1) were used to monitor biofilm growth on polyethylene (PE) and polyvinylchloride (PVC) pipe walls, respectively. These conditions were established based on wastewater irrigation practices. A ...

Sep. 2, 2015

By IWA Publishing

Comparison of four methods to assess biofilm development

Two nondestructive methods of biofilm quantification (optical density via a flatbed scanner and biofilm thickness) have been evaluated and compared to two destructive methods (Crystal Violet staining after biofilm disintegration and dry weight). The methods were tested on biofilms that developed on a modified rotating biological contactor (RBC) that was inoculated with urban wastewater and fed ...

Jan. 1, 2011

By IWA Publishing

Does your cooling tower have a biofouling problem?

What’s growing in your tower? It’s important to be able to identify microbial biofouling in the industrial cooling systems that you treat. We know that biofouling is a bad thing … reducing the heat transfer performance of a cooling system, as well as causing microbially induced corrosion, harboring pathogens, and accumulating scale deposits. All these problems can lead to ...

May 11, 2016

By AMSA, Inc.

Mechanism and kinetics of biofilm growth process influenced by shear stress in sewers

Sewer biofilms play an important role in the biotransformation of substances for methane and sulfide emission in sewer networks. The dynamic flows and the particular shear stress in sewers are the key factors determining the growth of the sewer biofilm. In this work, the development of sewer biofilm with varying shear stress is specifically investigated to gain a comprehensive understanding ...

Dec. 21, 2015

By IWA Publishing

Fate of <italic>Salmonella</italic> Typhimurium in laboratory-scale drinking water biofilms

Fate of Salmonella Typhimurium in laboratory-scale drinking water biofilms

Investigations were carried out to evaluate and quantify colonization of laboratory-scale drinking water biofilms by a chromosomally green fluorescent protein (gfp)-tagged strain of Salmonella Typhimurium. Gfp encodes the green fluorescent protein and thus allows in situ detection of undisturbed cells and is ideally suited for monitoring Salmonella in biofilms. The fate and persistence of ...

Dec. 11, 2013

By IWA Publishing

Chlorine requirement for biologically stable drinking water after nanofiltration

There is considerable interest in minimizing the chlorine residual in Japan's tap water because of increasing consumer complaints about the chlorinous odor of drinking water. However, minimization of the chlorine residual requires stricter control of biodegradable organics in finished water to ensure biological stability during water distribution. In this context, we investigated the ...

Jun. 12, 2014

By IWA Publishing

Using biofilms for monitoring metal contamination in lotic ecosystems: The protective effects of hardness and pH on metal bioaccumulation

Biofilms can make good bioindicators and biomarkers, offering a convenient tool to monitor metal contamination in streams that results from mine tailing sites. Biofilm metal content (Cu, Zn, Cd, Pb) as well as diatom diversity and the presence of teratologies (diatom abnormalities) were determined for biofilms from rivers with a variety of physico‐chemical properties across a metal ...

Oct. 28, 2015

By John Wiley & Sons, Ltd.

A Refinery saves 25% on biocide dosage by using HydroBio Advance

Real time determination and monitoring of biofilm in cooling systems 1. KEYWORDS HydroBio® Advance, Cooling system, Biofilm, Biocide consumption 2. BACKGROUND This case study shows how the application of the HydroBio® Advance is used to evaluate the real biocide demand of a cooling system in the petrochemical industry. Independent of the season the cooling system in a refinery was ...

Jul. 1, 2015

By Kurita

A Refinery saves 25% on biocide dosage by using HydroBio advance - Case Study

Real time determination and monitoring of biofilm in cooling systems 1. Keywords HydroBio Advance, Cooling system, Biofilm, Biocide consumption 2. Background This case study shows how the application of the HydroBio Advance is used to evaluate the real biocide demand of a cooling system in the petrochemical industry. Independent of the season the cooling system in a refinery was treated with ...

May 5, 2014

By Kurita

Influence of the shear stress and salinity on Anammox biofilms formation: Modelling results

Anammox biomass has a relatively long duplication time and low yield. This is an advantage because the production of surplus sludge is reduced; however it also implies that the process must be operated in reactors with very good sludge retention. Some of the systems used to improve biomass retention are based on biofilm reactors; therefore, the objective of this work was to study the ability of ...

Oct. 31, 2014

By IWA Publishing

Monitoring of CaSO4 deposition behaviors on biofilm during nanofiltration via ultrasonic time-domain reflectometry (UTDR)

The ultrasonic time-domain reflectometry (UTDR) as a non-destructive real-time method was employed to monitor the CaSO4 deposition behaviors on biofilm during nanofiltration (NF). Two parallel experiments were performed to compare the different behaviors of CaSO4 deposition with and without biofilm on the membrane. Results showed that the flux decline during combined fouling was slower than that ...

Aug. 1, 2010

By IWA Publishing

Are you Flushing Money Down your Cooling Tower?

When it’s up and running properly, your cooling tower is the quiet workhorse and unsung hero of your water system. But neglecting regular inspections, cleaning, and maintenance can lead to hundreds of thousands of dollars down the drain. Here’s how to keep it running at optimum levels of efficiency and performance – both for cost savings and for the environment. Limited Margin ...

Aug. 4, 2020

By H-O-H Water Technology, Inc.

Understanding the contribution of biofilm in an integrated fixed-film-activated sludge system (IFAS) designed for nitrogen removal

The objective of this study is to improve knowledge on the integrated fixed-film-activated sludge (IFAS) system designed for nitrogen removal. Biofilm growth and its contribution to nitrification were monitored under various operating conditions in a semi-industrial pilot-scale plant. Nitrification rates were observed in biofilms developed on free-floating media and in activated sludge operated ...

May 18, 2015

By IWA Publishing

The Moving Bed Biofilm Reactor Sewage Plant - The Who, What, When Where, Why and How

The MBBR Sewage Plant - The Who, What When Where, Why and How If you’re looking into biological water treatment methods and which one could be the best for your application, perhaps you’ve come across moving bed biofilm reactor (MBBR) technology. You probably have a few general questions as to how it works and how it can help you meet your particular needs, but are having a hard ...

Jul. 17, 2019

By Genesis Water Technologies, Inc.

The MBBR Sewage Plant: The WHO, WHAT, WHEN, WHERE, WHY, and HOW

If you are researching biological water treatment methods and which one could be the best for your application, perhaps you’ve come across moving bed biofilm reactors (MBBR). You probably have a few general questions as to how it works and how it can help you meet your particular company or municipalities wastewater treatment needs, but are having a hard time finding answers while searching ...

Jun. 4, 2019

By Genesis Water Technologies, Inc.

Biofilm control strategies in industrial processing waters

Bacterial biofilms cause a number of serious problems for industrial fluid processing operations. Mechanical blockages, impedance of heat transfer processes and microbially induced corrosion result in billions of dollars of losses each year. In engineered systems, such as cooling water systems, food processing, and other industrial applications possible risk to public health and product spoilage ...

Jan. 7, 2011

By MIOX Corporation - Johnson Matthey`s Water Technologies

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