AWWA WQTC65706

The objective of a European system for environmental technology verification (ETV) is to verify the performancecharacteristics of commercial-ready (environmental) technologies through theevaluation of objective and quality assured data so that potential purchasers andpermitters, both inside and outside of Europe, are provided with an independentassessment of what they are buying. In order to establish such a system the EuropeanUnion has launched a number of research and demonstration projects.One of these projects, TESTNET (Towards European Sectorial Testing Networks forEnvironmentally sound Technologies) aims to develop an independent system toprovide the market with credible performance data from the focus areas of the project,one of these being water monitoring technology.The verification procedure for water monitoring technologies uses data generated byagreed performance testing procedures as described in ISO 15839: Water Quality -Online Sensors/Analyzing Equipment for Water - Specifications and PerformanceTests. However, these procedures are mainly developed for chemical monitors, and inorder to be able to handle bio-monitors, a test case has been set up which shalldisclose the needs for adaptation of the existing protocols, if any.The TOXcontrol biomonitor, which is an on-line water quality monitoring system, waschosen for the test case. It is an automatic instrument, which uses freshly cultivatedlight emitting bacteria (Vibrio fischeri) as a biological sensor. Toxic substancespresent in the water sample destroy some amount of bacteria, leading to a decreaseof the light emitted by the bacteria. The instrument calculates the inhibition factor asdescribed in the ISO 11348-1 Standard. Measurement parameters can be selectedaccording to the parameters described in the standard: dilution ratio, exposure time.The complete system was tested both in the lab as well as on-site. A list of the testswill be realized on the TOXcontrol biomonitor while following the two standards ISO11348 and ISO 15839: Response time: conform to the standard ISO 15839,Coefficient of variation, Limit of detection (LOD) and limit of quantification (LOQ),Repeatability, Smaller detectable change, Short-term Drift, Effects of memory,Operating conditions and environment, short term drift, memory effect etc. Includes figure.

Product Details

Edition:

Vol. - No.

Published:

11/01/2007

Number of Pages:

3

File Size:

1 file , 190 KB