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aquaBio
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Automatic product for the determination of Escherichia coli and total coliforms
The Escherichia coli and total coliform parameters are key and essential indicators for determining possible uses and reuse of the water.
RD1620/2007,which sets the legal basis for reusing treated water requires controlling Escherichia coli and depending on its concentration, defines the allowed uses for the water that is regenerated.
In addition, directive 2006/7/CE relative to the management of the quality of bath water classifies the quality of this resource according to several parameters, where the determination of the presence of Escherichia coli is an important factor.
aquaBio is especially designed for determining the total Escherichia coli and coliforms in water, which makes it an optimum tool for water monitoring according to its use.
内容说明
STRUCTURE
● Hydraulic and fluid management system.
● Thermostatic measuring chamber that includes the bucket where the incubation and measurement of the sample is conducted optically.
● Multi-λ optic measuring system.
● Software and electronics capable of controlling the system and managing the data.
OPERTION
The measurement principle is based on DST®(defined substrate technology),with an alternate fluorescence and absorbance detection system.
Defined Substrate Technology
aquaBio uses reagent Colilert-18®based on defined substrate technology(DST®) for the detection of total coliforms and Escherichia coli.
The coliform use the β-galactosidase to metabolize ONPG and generate a yellow medium.
Escherichia coli, also uses β-glucuronidase to metabolize MUG and generate fluorescence.
The determination of E.Coli as well as total coliforms is based on the correlation that exists between the concentration of bacteria and the time when the fluorescence and/ or the color appears.
The sensitivity of the system allow detecting concentrations of 108 NMP after 3 hours.
Disinfection of the System
The independence between samples is assured by an adequate hydraulic and mechanical management of the system, avoiding contamination between the different samples.
NOTEWORTHY CHARACTERISTICS
● Calculating the NMP in 3h for waters that are highly contaminated.
● Low maintenance
The system only requires maintenance every 15 days. These quarterly tasks are limited to replacing reagents and a monthly semi-automatic cleaning and replacement of a consumable part.
● Programming the equipment
aquaBio is programmable and allows carrying out daily analysis at the same time or consecutively, providing a graphic display of the accumulated values.
● Transmission to the control center
The data may be transmitted to a control center automatically for analysis and use. Furthermore, aquaBio operates the results and sends alarms to other equipment ( ie. aquaMostra, the automatic sampling equipment) or to additional water monitoring networks.
GENERAL CHARACTERISTICS
| Measurement principle |
Fluorimetric detection for Escherichia coli Colorimetric detection for total coliforms |
| Reagents used | Colilert-18®(*)from IDEXX in liquid form Cleaning solution |
| Detection limit |
Escherichia coli : 1 bacteria in 100 ml Total coliforms : 1 bacteria in 100 ml |
| Temperature regulation | ±0.1℃ |
| Analysis time | from 3 to 18 hours, depending on the concentration |
| Electrical power | 110-230VAC/50-60 Hz |
| Communications |
RS-232 port and RS-485 port MOD-BUS or ASCII protocol Analogue output 0-10V/4-20mA Alphanumeric terminal graph in color Data extraction program via PC |
| Alarms | Two alarms, which may be upgraded to four Relay output |
| Dimensions | 105cm*70cm*42cm |
