Water / Wastewater 31 Real-time Water
Quality Monitoring for Effective Algae Control in Large Water Surfaces LG Sonic
(the Nether- lands) introduces a user-friendly software, the MPC-View, to follow the water quality in lakes and reservoirs
visually. The software receives its data from advanced water quality sensors that are integrated into the MPC-Buoy, a floating solar-powered system for the control of algal blooms through ultrasound.
A floating buoy system measures essential algae indicators (Chlorophyll-a, Phycocyanin, and Turbidity) and water quality parameters (Dissolved Oxygen (DO), Redox, pH, and Temperature) in order to monitor the water quality. The measured data can be viewed in real-time via a web-based software called the MPC-View.
Since the data is collected every 10 minutes, the software receives highly accurate water quality data. Customers can log into the software, where they will find a personal dashboard displaying an overview of their algae control projects. The software provides insight into the water quality, algae trends, and the progress of the ultrasonic treatment. Furthermore, the software displays technical parameters, such as the status of the ultrasonic transmitters, signal strength, and battery strength. This way, customers and employees of LG Sonic can monitor remotely to see whether the devices are working properly. Generated reports can be exported to Excel or converted to PDF, and from there they can be shared or published.
After a specific program is set up to target the algae, four ultrasonic transmitters are activated or optimised for 360° sound coverage. The algae are controlled through the use of ultrasonic pressure.
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British Water Testing Company Helping London Zoo Keep its Aquatic Inhabitants Safe
ZSL London Zoo has one of the largest collections of aquatic life in the UK, including some of the rarest species of fish and amphibians. This diversity creates unique water quality demands as each species often requires very specific water conditions to survive, with a slight change in conditions being potentially life-threatening. Regular, highly accurate water testing is therefore a critical part of managing the aquatic collections.
To help ensure optimum water quality for all aquatic species, the Zoo has opted for water testing equipment from British company Palintest. The aquarium team utilises the Photometer 7100 for monitoring chlorine, alkalinity, phosphate, ammonia, nitrite, potassium and pH. The herpetology (amphibian) team also uses the Photometer 7100, but in addition uses electrochemical testing products, including Palintest’s Micro 600 pH meter and a Micro 800 dissolved oxygen (DO) meter as part of their water quality monitoring protocol.
A Palintest Micro 800 dissolved oxygen meter in use at ZSL London Zoo
The feedwater for both the aquarium and herpetology sections is provided by Thames Water. This includes chlorine which must be removed before it comes into contact with any of the aquatic life. At the zoo, much of the water is treated via reverse osmosis (RO) and then remineralised to ensure control of the water quality habitats. Chlorine analysis of the feedwater prior to the RO is also critical for the protection of the RO membranes.
Alkalinity measures how water will change with the addition of an acid or alkaline substance, which in turn can affect pH. Aquatic life is very sensitive to pH changes, so maintaining a good alkalinity level helps maintain a stable environment overall. Phosphate testing is important for coral, which is predominantly made up of calcium. At high levels phosphate prevents the uptake of calcium by the coral, so levels must be maintained below 0.1 mg/l. Ammonia is a waste product of aquatic life and is poisonous to fish. It is normally broken down to nitrite by bacteria in the water as part of the nitrogen cycle. Nitrite is also hazardous for aquatic life, so measuring both ammonia and nitrite are essential in understanding the aquatic ecosystem.
As part of its vital conservation work, the herpetology section became the first place in the world to breed the Lake Oku Clawed Frog, an extremely rare species only found in high altitude Lake Oku in Cameroon. As the reproductive biology of the frog was unknown the keepers had to replicate the specific environmental parameters of Lake Oku.
Using the Micro 800 DO meter and the Photometer 7100, the keepers determined that the tadpoles only thrived in an unusual aquatic environment containing less than 20ppm of total dissolved solids (TDS). In their natural environment in Lake Oku, TDS levels were below 10ppm, indicating that this particular species of frog has evolved only to thrive in a single and stable environment.
Commenting on the London Zoo project, Palintest’s Marketing Manager Tom Aylward said: “It’s very rewarding to see our products being put to such important use. By ensuring a safe aquatic environment for fish and amphibians at London Zoo – and by helping to understand the life cycle of an extremely rare and endangered animal – we feel we’re playing a vital role in the Zoo’s conservation efforts.”
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Fundamental Checks of Water Quality in One Go!
Trans Instruments (Singapore) is pleased to announce the addition of the new HM3070 AquaCombo meter, which simultaneously measures fundamental water parameters - namely pH, Dissolved Oxygen, Conductivity or Salinity, and Temperature.
The HM3070 AquaCombo meter is specially designed for full portability, simplicity and ease of use which meets general environmental measurements. With a pH range of 2 to 12pH at a resolution of 0.1, Conductivity of up to 69mS, salinity up to 42ppt, Dissolved Oxygen level up to 30ppm and temperature of 0 to 60°C, the meter is ideally suited to aquaculture monitoring, open or closed water systems, environmental water checks, waste water control etc.
Calibration is made simple with 3 point buffer recognition calibration for pH, single point calibration at a preferred Conductivity range and in-air calibration for Dissolved Oxygen.
This meter is robust and rugged with a waterproof rating at IP67 for usage in hash weather conditions. A regular 1 meter cable probe for pH and conductivity and a 3 meter cable probe for DO will meet most measuring situations. The meter is able to store up to 99 data points in its memory. Now everyone, even site workers, can operate this simple to use AquaCombo meter.
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39447pr@reply-direct.com Automate your Metals Digestion…
Auto reagent addition, mixing and heating -> consistent results
Less manual handling of acids -> better lab safety
Pre-programmed software -> saves time & improves consistency Unattended operation -> frees staff for other work
Optional auto syringe module prepares up to 6 standards -> saves time
Applications include: Chemical industry Mercury Testing Mining Petroleum
Pharmaceuticals Plastics Soils Wastewater
email:
sales@seal-analytical.info or visit our website.
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RANS INSTRUMENTS for the professionals
Trusted for more than 25 years
serving professionals in fields of pH, Conductivity, TDS and Dissolved Oxygen measurements
sales@transinstruments.com 6521ad@reply-direct.com www.envirotech-online.com IET Annual Buyers’ Guide 2016/17
Products of Singapore SG
www.transinstruments.com
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