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Enzymatic Cleaning of Cellulose Acetate Membrane Reverse Osmosis Systems
1Department of Food Science and Nutrition, The Ohio Agricultural Research and Development Center, Columbus, Ohio 43210.
Journal of Food Protection
|March 7, 2019
Summary
Evaluating enzyme cleaning of reverse osmosis (RO) systems requires advanced methods. The radioisotope 33P technique offers a quantitative measure of soil removal, unlike flux restoration or dissolved solids analysis.
Area of Science:
- Membrane Science and Technology
- Biotechnology
- Chemical Engineering
Background:
- Enzyme cleaning is crucial for maintaining the efficiency of tubular reverse osmosis (RO) systems.
- Traditional cleaning efficacy evaluation methods like flux restoration and dissolved solids analysis have limitations.
Purpose of the Study:
- To compare the effectiveness of different methods for evaluating enzyme cleaning in RO systems.
- To assess the utility of radioisotope tracing as a quantitative cleaning assessment tool.
Main Methods:
- Comparison of flux restoration, dissolved solids in permeate, and radioisotope (33P-inorganic phosphate) removal.
- Microbiological evaluation served as the reference standard.
- Swab techniques were employed to identify problem areas.
Main Results:
- Flux restoration and dissolved solids analysis provided unreliable indicators of cleaning efficacy.
- Radioisotope 33P-phosphate measurement offered a quantitative assessment of soil removal, revealing cyclic cleaning patterns.
- Swab techniques were effective in pinpointing areas needing attention.
Conclusions:
- The 33P-phosphate technique is a valuable research tool for evaluating RO system cleaning and identifying areas of low turbulence.
- It aids in optimizing equipment design and improving cleaning protocols.
- Standard methods like flux restoration are insufficient for comprehensive cleaning assessment.
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