Here is a link to 'Methods to Make Chlorine Solution in Ebola Emergencies' developed by Daniele Lantagne at Tufts for use my operational organsiations in Ebola.
In addition, the UNICEF WASH in ETCs describes disinfection procedures for 0.5% and 0.05% chlorine solution.
Chlorine solution 0.5%: How to Make: 70% HTH chlorine powder: 10 spoons* of chlorine powder in 20 Liters of water (approximately 5 gallons) of water. OR with 3.5% Liquid Bleach: 2 spoons* in 20 Liters of water Used for disinfection of: - Body fluids, excreta, vomit, etc. - Corpses - Toilets and bathrooms - Gloved hands - Floors - Beds & mattress covers - Footbaths - Plates, cups and eating utensils.
Chlorine Solution 0.05% How to Make: Using 70% HTH Chlorine Powder: 1 spoon* of chlorine powder in 20 Liters (approximately 5 gallons) of water OR 3.5% Liquid Bleach: 1 liter of 0.5% solution in 10 Liters water, *One levelled table spoon, 14 – 15g Used for disinfection of: - Bare hands, skin and shoes. - Thermometers. - Laundry. - Plates, cups and eating utensils.
Also remember that turbidity and solved metals (for instance iron) in the water to treat will impact the process (it is mentioned in the methodology by Lantagne linked above), therefore either requiring pretreatment (e.g. flocculation) or, in case that's not possible, to increase the chlorine quantities.
Furthermore, it is important mentioning that, as per the 2008 MSF VHF guidelines, the chlorinated solution should be prepared daily and then changed at the handwashing and footbaths stations at least twice a day or upon need; for footbaths, it is also advised to have an additional basin as to wash any dirt from the boots prior entering the foodbath.
Hello, I didn't check if this question was treated before, sorry if this is the case: I am just wondering why the 3 MSF Standard chlorine solutions used in Cholera Treatment Centers/Units (0.05%, 0.2% and 2%) are not used in ETCs-ETUs now, and quite "softened" at 0.05% and 0.5% maximum, even for extreme desinfection (dead bodies, latrines, used cleansing materials, etc). Is the parallel Cholera - Ebola inappropriate for chlorination methods ? Also another remark: I think it should be emphazised in the Ebola WASH Guidance Notes that the latrines should be constructed in a way that there is no exfiltration risks into surrounding soil, with a closed pit, like a reservoir (plastic sheeting all against Inside walls and bottom) to be desinfected regularly, or am I wrong?
Thank you EdoC
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