The latest precision respirometer for rapidly measuring actual Activated Sludge bacterial performance. Advanced 6-cell precision OUR measurement system. Easy and rapid test procedures. User friendly software providing a real time display of bacterial respiration. Automatic Report generation and calculation of EC10,20,50 values for carbonaceous and nitrifying bacteria. Efficient procedures gives test times of between approximately 10 and 30 minutes. Tests provided are: Carbonaceous and Nitrifying Sludge Health, Respiration Inhibition, Nitrification Inhibition, BOD(ST), and Respirometry.
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Strathtox is an integrated desktop respirometer comprising the following sub-systems:
Temperature controlled Circulating Waterbath
This is used to maintain the activated sludge at constant temperature during a respirometry run. A six position magnetic stirrer is located beneath the bath. The six 20ml respirometer cells are located in a rack, for easy removal at the end of a run.
Activated Sludge Temperature Controlled Containment
A flask provides aeration and containment of approximately 600ml of AS that can also be spilt for Nitrification testing.
These high precision electrodes are housed in electrode holders for easy insertion into the respirometer cells. They require little maintenance, other than occasional membrane changes.
The six oxygen electrodes are connected to this unit, which transmits the digital signals to the computer software.
The easy-to-use Windows software comprises 5 different tests. Each test program has a similar basic structure compromising four stages: Setup; Recording; Analysis; Report. To illustrate this, sample screens from a Respiration Inhibition Test are shown below.
This is the first screen and is used to input the data about the test. This information is transferred to the final Report.
Clicking a 'Start' button on the toolbar of the Setup screen, commences the recording. Six traces scroll across the screen, providing a visual check on the rate and linearity of the decline in the oxygen content of the cells as respiration proceeds. At the end of the run, a file is created to save the data.
The analysis is simple. The data file may be recalled to the screen straight away, or at some future time. Two selector lines are dragged to enclose a suitable length of trace. Regression lines are fitted automatically, and the calculated respiration rates are transferred to the Report.
The report window provides information on the respiration rates, inhibition or (Toxicity) values, an inhibition v concentration graph and a respiration v concentration plot, together with a full audit trail. The report is in the form of a locked spreadsheet, so data cannot be altered. The data can however, be exported to Excel, or a database for further processing, if required. The report and associated Analysis screen can be printed or saved to an archive folder.