BW-FR Series RO Membranes - Withstand 30 Chemical Cleaning

Performance
Comparison image of RO membrane before and after cleaning

In industries such as pharmaceuticals and dyeing, where high-pollution water sources need to be treated, frequent cleaning is a necessary condition to ensure production quality and efficiency. Therefore, selecting RO membranes with high cleaning resistance is crucial. The BW-FR series fouling resistance RO membranes, like FilmTec membranes, utilize a non oxidative post treatment process, significantly enhancing the membranes' chemical cleaning resistance. Compared to traditional oxidation treatment membranes, our membranes can withstand a higher frequency of cleaning, achieving over 60 cleaning cycles at most. This means that the membranes can maintain high water flux and desalination rates even after cleaning, effectively extending the lifespan of the membranes and reducing operating costs, making them an ideal choice for high-demand applications.

BW-FR RO Membrane Comparison Test Report

BW-FR RO Membranes, no oxidation post-treatment, resistant to chemical cleaning, with good recovery and stable performance, up to more than 60 times cleaning cycles. Here we share some of the comparative experimental data from 30 times cleaning cycles.

Experimental Methods: Single-element 8" RO housing are connected in parallel, and two brands of contamination-resistant membranes are operated under the same conditions. After rapid fouling, the performance recovery test of acid and alkali chemical cleaning.

Water quality: Factory production wastewater (discharge water quality varies from process to process), mixed with industrial water supply, production wastewater contains high COD and industrial water supply has high hardness.

Test conditions: Pressure frequency conversion regulation constant, recovery rate control in 14%–15%.

Table 1: BW-FR RO Membrane Comparison Test Report
Cleaning times Test conditions SMBW-8040-400FR/34 BW30FR-400/34FilmTec
Raw water Concentration (μs/cm) Temp. (°C) Test Pressure (psi) PH Recovery Rate (%) Flux LPM Recovery Rate (%) Flux LPM
1 2140 19 175 6.3 99.27 19 99.34 20
2 2900 17 175 6 99.28 19 99.34 20
3 1141 21 175 7 99.28 19 99.36 20
4 1204 26 175 6.8 99.27 19 99.35 20
5 1390 20 175 6.7 99.24 18 99.32 20
6 1816 18 175 6.5 99.2 18 99.28 20
7 1705 19 175 6.6 99.15 18 99.17 20
8 1920 22 175 6.3 99.12 18 99.15 19.5
9 1760 21 175 6.5 99.06 18 99.12 19.5
10 1874 24 175 6.5 98.08 18 99.12 19.5
11 2103 23 175 6.2 99.1 18 99.13 19.5
12 1766 27 175 6.6 98.89 17.5 99.06 19.5
13 1985 25 175 6.7 98.89 17.5 98.95 19.5
14 1796 22 175 6.4 98.86 17.5 98.94 19
15 1620 31 175 6.6 98.84 17.5 98.95 19
16 1975 24 175 6.2 98.85 17.5 98.87 19
17 1655 26 175 6.4 98.85 17.5 98.87 19
18 1877 21 175 6.5 98.77 17.5 98.85 19
19 1680 25 175 6.4 98.69 17.5 98.6 19
20 1947 24 175 6.3 98.76 17.5 98.85 19
21 1950 22 175 6.2 98.75 17.5 98.83 18.5
22 1845 21 175 6.5 98.74 17.5 98.82 18.5
23 1796 19 175 6.3 98.69 17 98.85 18.5
24 1800 20 175 6.6 98.73 17 98.84 18.5
25 1917 19 175 6.3 98.72 17 98.8 18.5
26 1722 17 175 6.4 98.68 17 98.8 18.5
27 1690 19 175 6.4 98.65 17 98.79 18.5
28 2238 19 175 6.1 98.66 17 98.78 18.5
29 2495 18 175 6 98.65 17 98.79 18.5
30 2074 17 175 6.2 98.65 17 98.78 18.5
Data Analysis:
  • The recovery rate decay of the Snowate membrane is approximately 0.62%, while that of FilmTec is about 0.56%.
  • The flux decay for the Snowate membrane is approximately 10.5%, compared to 7.5% for FilmTec.
  • The purpose of this test is to compare the recover ability of membrane elements after rapid fouling through chemical cleaning, involving 30 repetitions, including both acid and alkaline cleaning.
  • Due to the specific nature of this experiment and the significant differences from actual operating conditions, the data obtained are for reference only and should not be used as a basis for normal operation.