Treatment fluid disposal in chemical cleaning processes for...

C - Chemistry – Metallurgy – 02 – F

Patent

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C02F 1/52 (2006.01) C02F 1/66 (2006.01) C02F 1/70 (2006.01)

Patent

CA 2593762

A process for the disposal of treatment fluid runoff from drinking water facilities cleaning procedures is disclosed. Due to accumulating sediments, mineral deposits and biological contamination, drinking water tanks and facilities must be cleaned on a regular basis to guarantee water quality and reduce the amount of chlorination required. Various cleaning processes are known, which produce contaminated treatment fluid runoff. The invention provides a runoff disposal process including the principle steps of collecting the runoff in a holding facility, analysing the pH of the runoff, neutralizing the pH of the runoff with a pH neutralizing agent, and filtering the runoff to remove suspended particulates. Additional steps may include analyzing the chlorine residual in the runoff, and de-chlorinating the runoff with a de- chlorinating agent.

L'invention concerne un procédé destiné à l'élimination d'un écoulement de fluide de traitement issu de procédures de nettoyage d'installations d'eau potable. En raison de l'accumulation de sédiments, de dépôts minéraux et d'une contamination biologique, des réservoirs et des installations d'eau potable doivent être nettoyés régulièrement de manière à garantir la qualité de l'eau et à réduire la quantité de chloration nécessaire. Divers procédés de nettoyage sont connus, lesquels produisent un écoulement de fluide de traitement contaminé. L'invention concerne un procédé d'élimination d'écoulement comprenant les étapes principales consistant : à recueillir l'écoulement dans une installation de stockage, à analyser le pH de l'écoulement, à neutraliser le pH de l'écoulement au moyen d'un agent de neutralisation de pH et à filtrer l'écoulement de manière à éliminer des particules suspendues. Des étapes supplémentaires peuvent consister à analyser le résidu de chlore dans l'écoulement et à déchlorer celui-ci au moyen d'un agent de déchloration

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