Post-ozonation in a municipal wastewater treatment plant improves water quality in the receiving stream

Ashauer, Roman

doi:10.1186/s12302-015-0068-z

Environmental Sciences Europe

Table 1 Sampling sites, dates and SPEAR values

From: Post-ozonation in a municipal wastewater treatment plant improves water quality in the receiving stream

Ozonation	Sampling date	Sampling site (site number in brackets, see Fig. 1)	Coordinates^a	SPEAR (% relative abundance of species at risk)^b
Group A
No	5 October 2006	600 m upstream of WWTP (1)	2′676′819/1′256′070	16.20
No	5 October 2006	200 m upstream of WWTP (2)	2′676′457/1′256′202	21.27
No	26 February 2007	600 m upstream of WWTP (1)	2′676′098/1′256′159	21.52
No	26 February 2007	200 m upstream of WWTP (2)	2′675′322/1′256′133	27.15
No	10 March 2014	40 m upstream of WWTP (3)	2′676′296/1′256′225	20.42
No	14 October 2014	40 m upstream of WWTP (3)	2′676′296/1′256′225	15.03
Mean (95 % confidence intervals)				20.27 (15.72, 24.81)
Group B
Yes	20 October 2008	600 m upstream of WWTP (1)	2′676′819/1′256′070	16.38
Yes	20 October 2008	200 m upstream of WWTP (2)	2′676′457/1′256′202	27.75
Yes	26 February 2008	600 m upstream of WWTP (1)	2′676′098/1′256′159	17.20
Yes	26 February 2008	200 m upstream of WWTP (2)	2′675′322/1′256′133	20.70
Mean (95 % confidence intervals)				20.51 (12.27, 28.75)
Group C
No	5 October 2006	200 m downstream of WWTP (5)	2′676′819/1′256′070	13.31
No	5 October 2006	1000 m downstream of WWTP (6)	2′676′457/1′256′202	20.71
No	26 February 2007	200 m downstream of WWTP (5)	2′676′098/1′256′159	16.07
No	26 February 2007	1000 m downstream of WWTP (6)	2′675′322/1′256′133	17.58
No	10 March 2014	40 m downstream of WWTP (4)	2′676′211/1′256′205	22.03
No	14 October 2014	40 m downstream of WWTP (4)	2′676′211/1′256′205	17.64
Mean (95 % confidence intervals)				17.89 (14.59, 21.19)
Group D
Yes	20 October 2008	200 m downstream of WWTP (5)	2′676′819/1′256′070	30.57
Yes	20 October 2008	1000 m downstream of WWTP (6)	2′676′457/1′256′202	29.84
Yes	26 February 2008	200 m downstream of WWTP (5)	2′676′098/1′256′159	31.01
Yes	26 February 2008	1000 m downstream of WWTP (6)	2′675′322/1′256′133	28.01
Mean (95 % confidence intervals)				29.86 (27.75, 31.96)

^aGeographic coordinates: North/East
^bSee Eq. (1), indicator also known as SPEAR_pesticides

Back to article page