Direct toxicity assessment of wastewater: Baroxymeter, a portable rapid toxicity device and the industry perspective.
Direct toxicity assessment of wastewater is becoming necessary, and new legislation may render it compulsory for the water industry. At present such assessment is performed at a laboratory away from a site, at considerable cost, and results often come too late, after a toxic event has occurred and the toxin has been released into the environment. Some of the rapid toxicity tests available today require certain conditions to function properly, or their results do not always correlate with other methods. The objective of this study was to assess a portable device, the Baroxymeter, for its suitability as an instrument to test wastewater toxicity. The way the device works is based on monitoring respiration of a bacterial culture by pressure measurements and using respiration inhibition as a toxicity alert. It has been shown that it is possible to detect toxic substances such as 3,5-dichlorophenol and bronopol within 5 min from a 1-mL sample. The benefits and future applications of the Baroxymeter as a high-throughput, cost-effective alternative for toxicity screening are discussed in this article.
Tzoris
Achilles
A
Institute of Biotechnology, University of Cambridge, Tennis Court Road, CB2 1QT, United Kingdom.
Fearnside
David
D
Lovell
Matthew
M
Hall
Elizabeth A H
EA
D018407:Bacterial Physiological Phenomena; D003362:Cost-Benefit Analysis; D004867:Equipment Design; D010100:Oxygen / Q000032:analysis / Q000378:metabolism; D012680:Sensitivity and Specificity; D018675:Toxicity Tests / Q000379:methods*; D014865:Waste Disposal, Fluid; D014871:Water Microbiology; D014873:Water Pollutants / Q000633:toxicity*
D014873:Water Pollutants; D010100:Oxygen