X-FLOW UF OUTPUT

Projection UF plant
AquaFlex 0.8mm V1.04
Customer: Hantech Engineering Revision: 　 04 Jun. 2008
Project: UTAC reclaim water 528 CMD Revision date:
Lead nr: P-0804 Designed by: 　 Alice
Description: 　 Checked by:
Comments: The water quality for cutting line: pH:5.9 ~ 6.5; TH:2.6 ~9.3 ppm as CaCO3; TDS: 19 ~35 ppm; SiO2: 0.77 ~ 1 ppm; Turbidity: 5
~ 15 NTU; S. S. : 10 ~ 65 ppm; Flow Rate: 12 M3/Hr
The water quality for grinding line: pH:6.5 ~ 6.9; TDS: 1 ~ 5 ppm; SiO2: 77 ~ 88.4 ppm; Turbidity: 211 ~ 300NTU; S. S. : 150 ~ 914 ppm; Particle: 0.1 ~ 0.8 um; Flow rate : 10.2 M3/hr

Average permeate flow
20.0 m3/h
backwash tank
PACl dosing (60 g/l stocksolution to 5 mg/l in feed) 　 　 　 　 　 Designed
Number of units 1
1 dosingpumps @  1.9 l/h (usage: 44.5 l/day) 　 　 　 Modules per unit 16 　 　 　 CEB1 HCl dosing (281 g/l stocksolution to 450 mg/l)
Membrane area per module 20 m2 　 　 　 64.1 l/h (usage: 0 l/day)
Total number of modules 16
Total membrane area 320 m2
Average feed flow 22.2 m3/h (98 GPM)
Gross flux 72.0 lmh (42.4 gfd) 　 　 　 　 　 　 　 　 　 CEB2 NaOCl dosing (150 g/l stocksolution to 200 mg/l)
53.3 l/h (usage: 0.88 l/day)
NaOH dosing (319 g/l stocksolution to 400 mg/l)
1 feed pump(s) @ 23.0 m3/h (101.5 GPM) during filtration and FF 　 　 　 　 　 　 　 　 　 50.2 l/h (usage: 0.83 l/day)
Average air flow: 1.01 Nm3/h for AirFlush 　 　 　 　 　 　 　 1  BW pump(s) @ 80.0 m3/h  (352.27 GPM) during backwashing of 1 unit
40.0 m3/h  (176.1 GPM) during CEB dosing of 1 unit
Compressor(s) 160.0 Nm3/h during AirFlush of 1 unit 　 　 　 　 　 　 Install one backwash pump per 1 unit(s)
Average forward flush flow 0.87 m3/h  (3.8 GPM)
Average backwash flow 1.26 m3/h  (5.5 GPM)
Recovery 90.0% 　 　 Average CEB1 flow 　 m3/h  (0 GPM) CEB wash-in to Backwash waste
Efficiency 86.9% 　 　 Average CEB2 flow 0.09 m3/h  (0.4 GPM) CEB wash-in to Backwash waste
Average total conc. flow 2.22 m3/h  (9.8 GPM)
Operation of the plant:
Hydraulic Clean: The HC interval is set at 25 minutes, rendering 53.4 HC's per unit per day
@ 556 liters backwash waste and 384 liters FF waste per HC.
CEB1: CEB1 is performed with 450 mg/l HCl, during 10 minutes, every 24.3 hours, rendering 0 CEB1 per unit per day (or 0 CEB1 per unit per week)
@ 556 liters BW waste and 2223 liters CEB waste and 384 liters FF waste per CEB1.
CEB2: CEB2 is performed with 200 mg/l NaOCl and 400 mg/l NaOH, during 10 minutes, every 24.3 hours, rendering 0.99 CEB2 per unit per day (or 6.9 CEB2 per unit per week)
@ 556 liters BW waste and 2223 liters CEB waste and 384 liters FF waste per CEB2.
Comments:
Chemicals usage based on feedwater pH = 7 and alkalinity = 100 mg/l as CaCO3 unless stated otherwise