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Two types of wastewater samples were collected from a local water reclamation plant: secondary effluent from an activated sludge process (ASP), and secondary effluent from a membrane bioreactor (MBR) process. All water samples were collected in 10 or 20 L jerry cans. They were transported by laboratory vehicle and stored at 4 °C in a cold room. Effluents were filtered through a 0.45 μm filter to remove particles before reaction in photoreactor. Water quality parameters are presented in Table 1.

Table 1

Water quality parameters for wastewater treated effluents

ParametersASP effluentMBR effluent
NH4+-N (mg N/L) 0.25 ± 0.05 0.13 ± 0.04 
(mg N/L) 8.59 ± 0.40 7.07 ± 0.30 
(mg N/L) <DL <DL 
TOC, mg/L 7.06 ± 0.62 4.85 ± 0.38 
TC, mg/L 12.91 ± 0.42 14.94 ± 0.28 
IC, mg/L 5.85 ± 0.24 10.08 ± 0.09 
TN, mg/L 10.93 ± 0.46 7.38 ± 0.12 
DONa, mg/L 0.45 ± 0.06 0.26 ± 0.01 
pH 7.35 ± 0.50 7.96 ± 0.06 
UVT, % 73.27 ± 1.1 76.33 ± 0.64 
ParametersASP effluentMBR effluent
NH4+-N (mg N/L) 0.25 ± 0.05 0.13 ± 0.04 
(mg N/L) 8.59 ± 0.40 7.07 ± 0.30 
(mg N/L) <DL <DL 
TOC, mg/L 7.06 ± 0.62 4.85 ± 0.38 
TC, mg/L 12.91 ± 0.42 14.94 ± 0.28 
IC, mg/L 5.85 ± 0.24 10.08 ± 0.09 
TN, mg/L 10.93 ± 0.46 7.38 ± 0.12 
DONa, mg/L 0.45 ± 0.06 0.26 ± 0.01 
pH 7.35 ± 0.50 7.96 ± 0.06 
UVT, % 73.27 ± 1.1 76.33 ± 0.64 

DL: detection limit.

aDON measured in a liquid chromatography–organic carbon detector–organic nitrogen detector (LC-OCD-OND).

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