algae monitoring Applications

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Algae monitoring of drinking water reservoir -

by microLAN On-line Biomonitoring Systems     based in Waalwijk, NETHERLANDS

Due to green algae problems in the water reservoir of a drinking water treatment plant, the ALGcontrol was installed to continuously monitor the algae concentrations and possible toxic blue green algae blooms. During almost 4 months the ALGcontrol measured the total chlorophyll and cyano chlorophyll concentrations of the water reservoir. In order to be able to compare these results, second off-line controls were carried out using the ISO 10260 chlorophyll-a quantification (extraction into ethanol, spectrophotometric detection at 665 and 750 nm). The results of the off-line standard lab method show a good correlation with the measurements of the ALGcontrol. The good correlation can be verified as well at high as at low concentrations of total chlorophyll.

Monitoring of Algal Production / Monitoring of Algae Growth

by Chelsea Technologies Group     based in West Molesey, UNITED KINGDOM

Over the past 20 years active fluorescence has been widely adopted by the scientific community, ecosystem managers and crop growers as a rapid and non-invasive method of estimating photosynthetic performance within a wide range of organisms, including phytoplankton (microalgae and cyanobacteria), biofilms, benthic autotrophs (corals, macroalgae and sea grasses) and terrestrial plants. The main rational for applying active fluorescence is that changes in key fluorescence parameters can reveal the early onset of chronic and acute degradation of photosynthetic performance and subsequent growth, e.g. resulting from nutrient deficiency or the presence on one or more toxicants.

Over the past 15 years we have been developing an active fluorescence technique called Fast Repetition Rate (FRR) fluorometry to monitor algae populations in the open-ocean, primarily to support climate and ocean modelling.

Monitoring of Algae in Drinking Water

by Chelsea Technologies Group     based in West Molesey, UNITED KINGDOM

The UniLux in-situ fluorometer can be configured to detect a number of key parameters that are of importance to the Water Supply Industry. Primarily, the detection of Chlorophyll a in stored water systems, such as reservoirs, assists in the planning and informs decisions on water abstraction in relation to natural algae blooms that regularly occur throughout the year. As well as Chlorophyll a, these in-situ fluorometers can detect cyanobacterias, such as Phycocyanin and Phycoerythrin, which are often associated with algae groups of a toxic nature. Knowledge of concentrations of algae within the water can assist in determining the loading into water processing plants.

These in-situ fluorometers are available as single parameter sensors (UniLux), or 3 channel sensors (TriLux).The CTG FastFlow fast repetition rate fluorometer provides information on the physiological state of algae it monitors. As well as providing detailed information on the growth rate of the algae (which can indicate the occurrence of a future algae bloom), it can immediately inform and alarm on toxins that have accidentally or deliberately been introduced into the water systems, as with the FastGuard system. The FastFlow differs from the FastGuard system in that it logs and displays detailed information on the state of the algae monitored for operational requirements.

Cooling Tower, algae and biofilm control

by LG Sonic     based in Zoetermeer, NETHERLANDS

“Efficiently lowers algae, biofilm formation, bacterial counts and chemical consumption.” When temperatures are high, for example in cooling towers, a matrix of different microorganisms such as bacteria, fungi, EPS and algae can grow very rapidly. The disadvantages of biofilm formation in cooling towers can be enormous. Therefore water used in cooling towers needs frequent treatment and chemical shocks to keep levels of micro-organisms to a minimum.

Monitoring Raw Water Intake

by Turner Designs Hydrocarbon Instruments, Inc.     based in Fresno, CALIFORNIA (USA)

The Situation: Hydrocarbons in water intake used for municipal drinking water and desalination systems are commonly limited to 1 part per million. Problem: Naturally occurring organics in raw water are typically treated with chemicals. Total Organic Carbon (TOC) analyzers in the water treatment system can alert technicians when some type of organic material is present but cannot differentiate between natural organics, such as algae or leaves and hydrocarbons. Solution: A fluorescence monitor can be configured for sensitivity to hydrocarbons, with no significant response to other organics. The TD-4100XDC has the highest sensitivity to hydrocarbons in raw water, has a low cost of ownership, and can be modified with Teflon, Monel, and other corrosion resistant materials for sea water environments. Please visit http://www.oilinwatermonitors.com/applications-2/raw-water-intake for more information about this application.

Reduce biofilm formation

by LG Sonic     based in Zoetermeer, NETHERLANDS

In many industrial or professional applications where water is being stored, biofilm may grow. The growth of biofilm can damage the installations and reduce efficiency of the circuit. A biofilm can grow certain substrates which can be found in water. When temperatures are high, for example in cooling towers, a matrix of different micro- organisms such as bacteria, fungi, algae can grow very rapidly causing the formation of a biofilm on certain surfaces submerge in water. During the formation of this biofilm, certain micro organisms starts producing extra cellular polymeric substances (EPS) which reinforce the biofilm structure.

Environmental Monitoring - Water Screening for Pollutants - Pesticide Screening

by Biosensor     based in Formello, ITALY

Water screening for the detection of pollutants owning to large classes of chemical compounds such as triazine, fenylurea, diazine and phenolic pesticides can be performed. The presence of environmental pollutants can be determined utilizing biological materials such as photosynthetic biomediators (Plants, Algae, Cyanobacteria) and enzymes (e.g. Laccase or Tyrosinase). AMPBIO-ITO Light provides amperometric measurements performed on electro-active biological material suspended, deposited or grown on an Indium Tin Oxide (ITO) electrode, before and after the injection of the analyte under test. OPTICBIO-Multicell Survival optical is based on multicell arrays for biological material survival/storage and fluorescence measurement for the control of the physiological activity.

Sediment and Nutrient Loads

by FTS     based in Victoria, BRITISH COLUMBIA (CANADA)

SedEvent is an event-driven, automatic grab sampling system that provides a simple and practical method of accurately determining suspended sediment and nutrient loads. While suspended sediment concentration (SSC) cannot be directly measured accurately or reliably, turbidity has been shown to be an excellent surrogate for SSC. Turbidity is caused by suspended particulate matter such as clay, silt, algae, organic and inorganic chemicals and acids like fertilizers, and microscopic organisms like harmful bacteria. These contents give water its cloudy or turbid appearance, and turbidity in natural waters is recognized as an important indicator of natural health. Measuring suspended sediment concentrations used to be labor-intensive, costly, inaccurate and impractical. SedEvent not only makes it possible and practical, it makes it simple.

Gas Permeation Analysis

by Hiden Analytical     based in Warrington, UNITED KINGDOM

Dissolved Species Analysis Dissolved species analysis employing Hiden's high sensitivity membrane sampling technology for analysis of respiratory gases, hydrocarbons and sulphides is applied to a wide range of application areas including: Ecolological studies in sea water Bio fuel production from algae Pollution monitoring in river, estuary and reservoir waters Soil core analyses Fermentation

Water Contamination Detection

by Chelsea Technologies Group     based in West Molesey, UNITED KINGDOM

Security of water assets is becoming an increasingly major issue that demands immediate and robust alarms for potential contamination. In addition to this, natural growth of algae is a common problem for water asset managers, the results of which can increase maintenance costs of water processing plants as well as directly effecting water taste. The CTG FastGuard fast repetition rate fluorometer analyses information on the physiological state of the algae it monitors within an in-line flow system. A number of key parameters are monitored and analysed by the on-board embedded software, which instantly initiates both an audible and visual alarm on detection of a contaminant within the water system. The FastGuard is a robust low maintenance system which avoids false positives often provided by other contamination detection systems.

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