WATER / WASTEWATER 19 Simplifying the challenge of algal culture growth monitoring
Monitoring algal growth in test tubes without affecting algal cultures is a challenge for researchers. Turner Designs recently demonstrated an excellent solution to this concern using two of their standard products, the C-Fluor chlorophyll probe with their in-line adaptor.
Multiple algal cultures were diluted to low concentrations of chlorophyll. Cultures were evenly distributed into 25 mm diameter glass test tubes and placed in a room temp environment near a window for exposure to natural light. Growth was monitored using Turner Designs’ C-Fluor chlorophyll probe with the C-Fluor in-line adaptor. Daily measurements were made and test tubes were returned to their original location near the window for continued natural light exposure. These measurements were repeated until each C-Fluor probe’s response saturated.
C-Fluor probes output a voltage response proportional to the fl uorescence detected. The C-Fluor in vivo Chlorophyll Blue Excitation probe was used to measure the algal test tube cultures for this growth monitoring project. Turner Designs’ Databank handheld data logger was used to display voltage. Maximum concentrations detected ranged from 90 to 183 µg/L and are plotted for fi ve of the twelve cultures monitored.
Growth data can help determine ideal conditions for growth, calculate growth rates, or monitor densities for feeding experiments. Other sensors from our C-Fluor product line can also be used to monitor for pigments such as phycocyanin or phycoerythrin which may indicate contamination of algal cultures.
C-Fluor are sensitive, extremely low power single wavelength in situ fl uorescence and turbidity probes available in several optical confi gurations. Factory-calibrated, each C-Fluor ships with a calibration certifi cate used to convert the analogue or digital output signal to a specifi c concentration estimate. In addition to in vivo chlorophyll, phycocyanin and phycoerythrin, C-Fluor probes are also available for detecting: crude oil, CDOM/fDOM (dissolved organic material), fl uorescein dye, rhodamine dye, optical brighteners and turbidity.
Photometer to feed children in Africa
For More Info, email: email:
For More Info, email: email:
How can a photometer, dedicated to pool-water- testing, possibly feed children? Surprisingly enough –it can. From March 2020, Water-i.d. GmbH, the manufacturer of the well-recognised PoolLab1.0®
have decided to donate 1,-€ for each PoolLab® charity called “Steps for Children”.
Photometer, sold to a
The reason for this decision? 15 years ago, Stephan Hock, the brother of Water-i.d.’s general manager Andreas Hock, moved, together with his wife and children, to Windhoek, capital of Namibia, leaving a well-run newspaper-group behind to buy a lodge with restaurant and to start a new life in Africa. His passion was and still is cooking and so it no surprise that he calls the “Immanuel Wilderness Lodge Restaurant” his playground. Soon his talent got recognised and in 2012, Stephan was offi cially awarded as Namibia’s best chef. German TV broadcasted several features about him, local newspapers wrote and local as well as international celebrities became regular guests.
Stephan felt and feels blessed whilst feeling a growing desire to be an asset to his new, local community. His passion for cooking and the obvious lack of food for many school-children gave inspiration to the idea of starting an online-cookbook (
www.cookwithstephan. com), where Stephan and Stephan’s guests are able to share recipes based on a paid subscription with the aim to use 100% of the money earned to support children in Rehboth/Namibia with one warm meal a day. Stephan visited this area and was extremely saddened to see children in such poor condition. Since that time, he has organized help together with a charity called “Steps for Children”, knowing, that each 1,-€ collected, feeds one child for one day. It still breaks his heart to see that children coming to the “soup kitchen” need to be turned away as the money and food collected is still not suffi cient to feed all of these hungry children. It keeps Stephan motivated to search for ways to collect more, to fi nally reach the goal of giving every child in Rehboth the chance to have at least one warm meal a day.
Andreas Hock, MD of Water-i.d., wants to support his brother. Water-i.d. sees itself blessed by the overwhelming success of the PoolLab1.0®
of which
they have sold over 35,000 units in less than 3 years. An initial donation of EUR 5,000 was made together with the promise to donate another 1,-€ per each and every PoolLab1.0®
sold from March 2020 until at
least December 2020. Not everybody will see a direct connection between a photometer for testing pool water quality and the need of children in Africa, to have at least one warm meal a day, so the tale of Andrea’s brother Stephan may shed some light on this idea. You can also support “steps for children” directly.
More information online:
ilmt.co/PL/DmwP For More Info, email:
email: For More Info, email: email:
51701pr@reply-direct.com
WWW.ENVIROTECH-ONLINE.COM IET ANNUAL BUYERS’ GUIDE 2020/21 Myron L® Company’s new 900 Series industrial monitor/controller
combines fl exibility, accuracy and reliability. It is the ideal instrument for even the most demanding water treatment applications.
Measurement capabilities include: Conductivity, Resistivity, Salinity, TDS, pH, ORP, Temperature, mVDC, Flow and % Rejection. It includes a 4-20 mA input. Standard outputs are a 0-10 VDC recorder output and a Relay output. Available optional outputs include a 4-20 mA, an RS-485 output, as well as 2 additional Relays.
The instrument’s display can show up to 4 measurements simultaneously. Sensor setup allows the user to eliminate error due to cable length and enter custom cell constants for conductivity sensors. Calibration is electronic. It’s 3.5” touchscreen and intuitive GUI make it simple to set up, simple to use and simple to adapt to your specifi c needs.
The Myron L® requirement.
Company 900: A high level performer for applications where high level performance is an absolute
More information online:
ilmt.co/PL/yg6k For More Info, email: email:
Ultrapen PTBT Series
For More Info, email: email:
52131pr@reply-direct.com
43827pr@reply-direct.com
Smartphone/Tablet Compatible Tester Compatible with
Android and iOS Devices.
900 Series
Conductivity, Resistivity, TDS, pH, ORP, Salinity, ISE, Flow,
Pressure, with Touch Screen LCD +more!
www.myronl.com 760-438-2021
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