Table 5.

Physical and chemical parameters and methods used during the study.

Physical–Chemical Indicators	Measurement	Equipment	Standards
Ammonium nitrogen	Spectrophotometric	spectrometer DR 5000, Hach Germany	WAH HACH 2003 met. 8038 [54]
Color	Visual	-	EN ISO 7887:2011 [55]
Dissolved oxygen	Electrochemical	oxygen meter HQ30d, Hach Germany	EN ISO 5814:2012 [56]
Nitrate nitrogen	Ion chromatography	ion chromatograph 881 IC Compact Pro, Metrohm Switzerland	EN ISO 10304-1:2009 [57]
Orthophosphate	Spectrophotometric	spectrometer DR 5000, Hach Germany	WAH HACH 1997 met. 8048 [58]
pH	Electrochemical	pH meter 540 GLP, WTW Germany	EN ISO 10523:2012 [59]
Temperature	Electrochemical	oxygen meter HQ30d, Hach Germany	Manufacturer‘s instructions
Total nitrogen	Spectrophotometric	spectrometer DR 5000, Hach Germany	Cuvette Test LCK 138, Hach [60]
Total phosphorus	Spectrophotometric	spectrometer DR 5000, Hach Germany	Cuvette Test LCK 349, Hach [61]
Total suspended solids	Gravimetric	weight CP224S-OCE, Sartorius, Germany	EN 872:2005 [62]
Turbidity	Nephelometric	turbidimeter 2100 IS AN, Hach Germany	Manufacturer‘s instructions