This document defines the minimum requirements for treatment systems, which generate the active substance – \u201cActive chlorine\u201d – from sodium chloride by electrolysis for on-site (in situ) operation. The in situ generated active substance (IGAS), in this case active chlorine, may be put into a solution (\u201coff-line\u201d) or directly generated in the pipes (\u201cin-line\u201d). This document specifies the device construction, and test methods for the equipment used for in situ generation of active chlorine. It specifies requirements for instructions for installation, operation, maintenance, safety and for documentation to be provided with the product. The in situ generation of active substances and the placing of their precursors on the EU market are subject to the specifications of the Biocidal Products Regulation (EU) 528\/2012 [\u201cBiocidal products\u201d]. Active substances, generated by devices, which are claiming compliance with this document, shall comply with the BPR for both the registered active chlorine, quality standards and the precursor in accordance with appropriate application and \u201cProduct Type\u201d as listed in the BPR. This standard does not identify applications for in situ devices for generation of active chlorine. The range of applications for in situ generation of chlorine is diverse. It is the responsibility of the economic operator\/product supplier, claiming compliance with this standard, to identify the appropriate system type and operating conditions for the specific application and to: – specify the quality of the biocide appropriate to the application. This may be defined in national or international standards; – specify the appropriate product type and operating conditions (concentration, dosage rate and quality of the active chlorine); – specify any other regulatory requirements relevant to the specific application; – specify the appropriate precursor sodium chloride, for the application; – and to label the product accordingly.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 4 Requirements 4.1 General 4.2 Design 4.2.1 Temperature 4.2.2 Backflow prevention 4.2.3 Safety 4.3 Performance 4.4 Instructions 5 Electrolysis system and components 5.1 General 5.2 Electrolysis cell <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 5.3 Control unit 5.4 Optional items 5.4.1 Flow detector 5.4.2 System for dissipating stray electrical currents 5.4.3 Chlorine production adjustment feature <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 5.4.4 Temperature probe 5.4.5 Conductivity \/ TDS probe 5.4.6 Buffer tank 6 Process variants 6.1 Overview of process variants <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 6.2 Electrolysis systems with non-divided electrolysis cell 6.2.1 General 6.2.2 Processes with lower generation capacity and short-term operation <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6.2.3 Processes with high generation capacity and\/or long-term operation <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 6.3 Electrolysis system with divided electrolysis cell (membrane or diaphragm) 6.3.1 General <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 6.3.2 Process with acidic chlorine solution <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 6.3.3 Process with neutral chlorine solution <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 6.3.4 Process with alkaline chlorine solution <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 7 Safety requirements 7.1 General requirements 7.2 Hydrogen <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 7.3 Chlorine gas 7.4 Excess products and solutions 7.5 Buffer tank <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 7.6 Safety bunds 7.7 Prevention against backflow 8 Equipment of the room or area for installation of the electrolysis system <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 9 Operation and maintenance 10 Test requirements 10.1 General <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 10.2 Scope of testing 10.2.1 General 10.2.2 System documentation 10.2.3 Chemical characterization 10.2.3.1 General <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 10.2.3.2 Sampling <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 10.2.3.3 Testing the chlorine solution <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 10.2.4 Determination of the active chlorine content (main constituent) 10.2.4.1 General 10.2.4.2 Brief description 10.2.4.3 Reagents <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 10.2.4.4 Equipment 10.2.4.5 Execution <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | 10.2.4.6 Specification of the results 10.2.5 Determination of the chlorate content (ClO3\u2212) 10.2.5.1 Execution 10.2.5.2 Specification of the results <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 10.2.6 Determination of the bromate content (BrO3\u2212) 10.2.6.1 Execution 10.2.6.2 Specification of the results 10.2.7 Determination of the chloride content (Cl\u2212) 10.2.7.1 Execution <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 10.2.7.2 Specification of the results <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Annex A (informative)Natural decay of stored hypochlorite solutions A.1 General A.2 Decay reactions <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | A.3 Factors influencing chlorine decay and chlorate formation A.3.1 Influence of temperature and storage time <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | A.3.2 Chlorate formation vs. time and temperature <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | A.3.3 Influence of initial concentration vs. days of storage A.4 Influence of pH <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | A.5 Influence of decay catalysers (pollutants) and prevention <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Devices for in-situ<\/i> generation of biocides. Active chlorine generated from sodium chloride by electrolysis<\/b><\/p>\n |