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Table 1 Exposure periods

From: Influence of different wastewater treatment technologies on genotoxicity and dioxin-like toxicity in effluent-exposed fish

Test system

Type of exposure

Start of exposure

End of exposure (date of sampling)

Duration of exposure

WWTP A

Cagesa

27 Feb 2015

17 Apr 2015

50 days

Hatchery control

 

06 May 2015

Immediate dissection

WWTP B

Cagesb

03 Mar 2016

15 Mar 2016

13 days

Hatchery control

 

03 Mar 2016

Immediate dissection

WWTP C

Cages

15 Nov 2012 (prior to upgrade)/02 Dec 2013 (after upgrade)/03 Dec 2014 (after upgrade)

17 Jan 2013 (prior to upgrade)/04 Feb 2014 (after upgrade)/05 Feb 2015 (after upgrade)

63 days (prior to upgrade)/64 days (after upgrade)/64 days (after upgrade)

Laboratory control

15 Nov 2012

24 Jan 2013

70 days

Hatchery control

 

29 Jan 2014 / 04 Feb 2015

Immediate dissection

  1. aExposure at WWTP A was terminated after 50 days due to rising water temperatures and falling water levels downstream of the effluent
  2. bExposure at WWTP B was terminated after 13 days due to the incidence of mortality at Day 11