Table 3 Water quality of effluent for MBR and MCDI in comparison to standards of NEWater and Tainan wastewater reclamation plan

Physical parameters

Conductivity

µS cm^− 1

1021

988

122

< 250

< 250

pH value

-

6.5

6.4

8.2

7.0–8.5

6.0–8.5

Chemical Parameters

Ammonia-N

mg L^− 1

40

0.9

0.1

< 1.0

< 0.5

Nitrate-N

mg L^− 1

0.3

37.5

3.0

< 5

N.A.

TOC

mg L^− 1

97

1.8

2.0

< 0.5

< 1.0

COD

mg L^− 1

218

< 3.0

< 3.0

N.A.

< 4

Total Hardness (as CaCO₃)

mg L^− 1

62

60

8.0

< 50

< 50

Calcium

mg L^− 1

14

14

2

< 20

N.A.

Magnesium

mg L^− 1

6.2

5.8

0.6

N.A.

N.A.

Potassium

mg L^− 1

10

10

0.8

N.A.

N.A.

Sodium

mg L^− 1

99

96

16

< 20

N.A.

Chloride

mg L^− 1

127

120

11

< 20

N.A.

P

mg L^− 1

17

15

2.2

N.A.

N.A.

Sulphate

mg L^− 1

21

20

4

< 5

< 10