Transcript 기술 과제 완료 보고서 [ 기술 개발 PJT명 ]

NSF NO3/NO2 RO Performance TEST
1
[Test Condition]
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-
RO membrane : Coway 8 Inch S Type 3 set at each Condition
Influent challenge conc(mg/L) : 120 & 300 as Total Nitrogen
Pressure : 50 PSI & 100 PSI
Sampling Time : 4 hrs & 8 hrs
Recovery rate : 50 %
pH_: 7.2 ~ 7.3, Temperature : (20 ± 5) ℃
Pre RO TEST : TDS reduction rate > 88 % (by Tap water)
[Influent challenge water Make-up]
- Standard : RO + Sodium Nitrate(NaNO3) & + Sodium Nitrite(NaNO2) by 1 ton Tank
NO.
NO3+NO2 as N
NaNO3
NaNO2
NaCl
TDS in
[g]
[g]
[g]
[mg/L]
Tank1
120
656
60
60
720
Tank2
300
1640
150
0
990
[mg/L]
[Result Summary : Reduction rate(%)]
Influent challenge water
Pressure
50 PSI
100 PSI
120 mg/L as Total N
300 mg/L as Total N
Sampling time
NO3
NO2
NO3
NO2
4 hrs
75
73
75
71
8 hrs
75
73
75
71
4 hrs
77
74
76
73
8 hrs
77
74
76
73
NSF NO3/NO2 RO Performance TEST : DATA
NO3+NO2 as N
Pressure
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50 PSI
100 PSI
120 mg/L
300 mg/L
[mg/L]
NO3
NO2
NO3
NO2
Spec' level
108
12
270
30
Tank Con.
113.0
17.0
252.0
31.0
RO 1.
27.5
4.5
58.0
9.0
RO 2.
31.3
4.8
66.5
9.3
RO 3.
26.0
4.4
64.6
8.7
4 hr_reduction rate(%)
75
73
75
71
RO 1.
26.1
4.6
63.4
9.1
RO 2.
30.8
4.6
62.2
8.2
RO 3.
27.9
4.5
63.5
9.7
8 hr_reduction rate(%)
Spec' level
Tank Con.
RO 1.
RO 2.
RO 3.
4 hr_reduction rate(%)
RO 1.
RO 2.
RO 3.
8 hr_reduction rate(%)
75
108
116.0
28.8
25.8
25.5
77
26.1
26.5
27.3
77
73
12
17.0
4.3
4.4
4.5
74
4.3
4.4
4.5
74
75
270
290.0
69.2
70.8
69.2
76
69.0
71.2
68.7
76
71
30
37.0
10.5
9.7
9.8
73
9.9
10.1
10.0
73