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Table 2

Average values and standard deviation of the analysis results of the WWTP effluent and three produced ReUse Water types

		WWTP effluent		ReUse Water 1		ReUse Water 2		ReUse Water 3
Parameter	Unit	Average St. dev.	n	Average St. dev.	n	Average St. dev.	n	Average St. dev.	n
pH	–	6.9 ± 0.1	25	6.8 ± 0.1	24	6.8 ± 0.1	18	5.3 ± 0.2	23
Conductivity (25 °C)	μS/cm	1.314 ± 375	26	1.329 ± 376	25	1.401 ± 394	18	26.6 ± 12.0	24
Turbidity	NTU	2.26 ± 1.9	24	0.14 ± 0.11	24	0.24 ± 0.18	18	0.19 ± 0.22	21
N total	mg/L	8.3 ± 2.9	25	7.6 ± 2.7	26	8.4 ± 2.4	16	0.39 ± 0.19	23
P total	mg/L	0.37 ± 0.14	26	0.06 ± 0.06	26	0.09 ± 0.08	17	0.05 ± 0.06	23
COD	mg/L	39 ± 9	27	27 ± 11	27	21 ± 5	15	<5	24
TOC	mg/L	12.4 ± 2.5	30	10.0 ± 3.4	27	8.7 ± 2.5	17	0.39 ± 0.43	24
SAC₂₅₄	1/m	31.1 ± 17.4	21	23.9 ± 8.5	24	22.6 ± 12.5	17	0.21 ± 0.17	22
SAC₄₃₆	1/m	2.97 ± 1.69	6	1.12 ± 0.4	24	0.9 ± 0.3	18	0.05 ± 0.06	24
AOX	mg/L	0.05 ± 0.07	22	0.03 ± 0.02	21	0.02 ± 0.01	18	<0.01	18
Al total	mg/L	0.07 ± 0.03	33	0.03 ± 0.03	32	0.02 ± 0.01	18	0.009 ± 0.009	25
Fe total	mg/L	0.60 ± 0.19	35	0.04 ± 0.03	31	0.02 ± 0.02	18	0.007 ± 0.007	25
Mn total	mg/L	0.41 ± 0.12	36	0.41 ± 0.10	33	0.13 ± 0.21	16	0.003 ± 0.002	25
Cl⁻	mg/L	215 ± 102	24	215 ± 102	28	245 ± 113	18	2.9 ± 2.0	24
SO⁴⁻	mg/L	95.7 ± 25	23	91.8 ± 26	28	101 ± 25	18	0.6 ± 0.4	24
NH⁴⁺	mg/L	1.75 ± 2.47	27	1.86 ± 2.52	26	0.39 ± 0.66	18	0.10 ± 0.09	22
NO₂⁻	mg/L	1.10 ± 1.94	27	1.12 ± 1.94	27	0.24 ± 0.41	18	0.06 ± 0.05	24
O_₂ (aq)	mg/L	3.53 ± 1.37	25	6.31 ± 0.69	25	2.17 ± 1.82	18	5.73 ± 1.76	24
Ca²⁺	mg/L	78.8 ± 3.2	29	78.8 ± 12.0	29	77.5 ± 13.8	17	0.1 ± 0.1	25
Silicate total	mg/L	27.9 ± 5.0	20	27.6 ± 4.9	26	27.2 ± 5.0	18	0.25 ± 0.1	25
Base-neutralizing capacity	mmol/L	0.9 ± 0.4	27	1.0 ± 0.4	27	0.8 ± 0.3	16	0.7 ± 0.4	22
Alkalinity	mmol/L	4.5 ± 0.8	28	4.4 ± 1.3	27	3.9 ± 0.8	18	0.2 ± 0.2	22

		WWTP effluent		ReUse Water 1		ReUse Water 2		ReUse Water 3
Parameter	Unit	Average St. dev.	n	Average St. dev.	n	Average St. dev.	n	Average St. dev.	n
pH	–	6.9 ± 0.1	25	6.8 ± 0.1	24	6.8 ± 0.1	18	5.3 ± 0.2	23
Conductivity (25 °C)	μS/cm	1.314 ± 375	26	1.329 ± 376	25	1.401 ± 394	18	26.6 ± 12.0	24
Turbidity	NTU	2.26 ± 1.9	24	0.14 ± 0.11	24	0.24 ± 0.18	18	0.19 ± 0.22	21
N total	mg/L	8.3 ± 2.9	25	7.6 ± 2.7	26	8.4 ± 2.4	16	0.39 ± 0.19	23
P total	mg/L	0.37 ± 0.14	26	0.06 ± 0.06	26	0.09 ± 0.08	17	0.05 ± 0.06	23
COD	mg/L	39 ± 9	27	27 ± 11	27	21 ± 5	15	<5	24
TOC	mg/L	12.4 ± 2.5	30	10.0 ± 3.4	27	8.7 ± 2.5	17	0.39 ± 0.43	24
SAC₂₅₄	1/m	31.1 ± 17.4	21	23.9 ± 8.5	24	22.6 ± 12.5	17	0.21 ± 0.17	22
SAC₄₃₆	1/m	2.97 ± 1.69	6	1.12 ± 0.4	24	0.9 ± 0.3	18	0.05 ± 0.06	24
AOX	mg/L	0.05 ± 0.07	22	0.03 ± 0.02	21	0.02 ± 0.01	18	<0.01	18
Al total	mg/L	0.07 ± 0.03	33	0.03 ± 0.03	32	0.02 ± 0.01	18	0.009 ± 0.009	25
Fe total	mg/L	0.60 ± 0.19	35	0.04 ± 0.03	31	0.02 ± 0.02	18	0.007 ± 0.007	25
Mn total	mg/L	0.41 ± 0.12	36	0.41 ± 0.10	33	0.13 ± 0.21	16	0.003 ± 0.002	25
Cl⁻	mg/L	215 ± 102	24	215 ± 102	28	245 ± 113	18	2.9 ± 2.0	24
SO⁴⁻	mg/L	95.7 ± 25	23	91.8 ± 26	28	101 ± 25	18	0.6 ± 0.4	24
NH⁴⁺	mg/L	1.75 ± 2.47	27	1.86 ± 2.52	26	0.39 ± 0.66	18	0.10 ± 0.09	22
NO₂⁻	mg/L	1.10 ± 1.94	27	1.12 ± 1.94	27	0.24 ± 0.41	18	0.06 ± 0.05	24
O_₂ (aq)	mg/L	3.53 ± 1.37	25	6.31 ± 0.69	25	2.17 ± 1.82	18	5.73 ± 1.76	24
Ca²⁺	mg/L	78.8 ± 3.2	29	78.8 ± 12.0	29	77.5 ± 13.8	17	0.1 ± 0.1	25
Silicate total	mg/L	27.9 ± 5.0	20	27.6 ± 4.9	26	27.2 ± 5.0	18	0.25 ± 0.1	25
Base-neutralizing capacity	mmol/L	0.9 ± 0.4	27	1.0 ± 0.4	27	0.8 ± 0.3	16	0.7 ± 0.4	22
Alkalinity	mmol/L	4.5 ± 0.8	28	4.4 ± 1.3	27	3.9 ± 0.8	18	0.2 ± 0.2	22

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