Chemical Agents Available for Chemical Cleaning of Toray Submerged Membrane Element for MBR（Manual）
May 27, 2021
When considering chemical cleaning agents, try and select a cleaner that is most appropriate for the suspected foulant. Selecting an inappropriate cleaner can result in further loss in membrane performance or possible membrane damage. Table 1 lists suitable cleaning chemicals and standard cleaning conditions..
Table 1 Cleaning Chemicals and Standard Cleaning Conditions by Contaminan
|Contaminant||Chemical||Solution concentration||Amount used||Hold time|
|Organic matter||Sodium hypochlorite||2,000-6,000 mg/L
(Effective chlorine concentration)
|1 to 3 hours|
(either of the two chemicals)
|Oxalic acid*||0.5-1.0 wt%||1 to 3 hours|
|Citric acid||1-3 wt%||1 to 3 hours|
This content does not intend to guarantee the results of application of the information provided herein or the safety and the compatibility of this product.
Before using this product, the user is asked to check for its safety and compatibility with the intended purpose.
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This content is extracted from “Submerged Membrane Module for MBR TORAY “MEMBRAYTM” Instruction Manual”(the Manual). Please refer to other contents stated in the Manual.
( https://www.water.toray/knowledge/manual/ )