Disinfection Product CARELA® PEROXSIL

CARELA® PEROXSIL is used for the initial disinfection of a newly built water plant or for the disinfection of plants already in use respectively, for disinfection of wells, disinfection of water pipes, disinfection of sand filters, cascades, fresh water systems in buildings and on board ships.

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Disinfection of Pipelines

Newly installed pipelines have to be washed out thoroughly to remove crude impurities which might have settled down during the laying process. Already cleaned and also already dried-out cement mortar coated pipelines need to be rinsed out before disinfection to moisten the inside walls with water.

Disinfection Stand-in-place technique

During the stand-in-place technique, the disinfection solution remains in the pipeline for at least 6 hours.

The newly installed pipeline is filled with water to which through a socket, air valve or hydrant a constant ratio of CARELA® PEROXSIL is added in a concentration of 100 mg/l using a dosing pump.

During the disinfection process, a penetration of the disinfection solution into the pipelines in operation is to be avoided. The addition of CARELA® PEROXSIL into the water may only be stopped when the whole system is filled with the disinfection solution. The CARELA® PEROXSIL concentration is tested using indicator strips.

CARELA® PEROXSIL – Usage

Ø 250 mm pipeline of 1000 m needs only 5 kg CARELA® PEROXSIL to be disinfected.

Disinfection Flow Technique

Especially in pipelines with a great nominal diameter it is advantageous to add the CARELA® PEROXSIL solution – as previously described- over a longer period of time and during the flushing process into the system. The CARELA® PEROXSIL concentration of the flushing water needs to be checked frequently at the drainage. The water content of the pipeline system should be renewed at least once or twice with the CARELA® PEROXSIL solution.

Disinfection during pressure test

The combination of pipeline disinfection with a pressure test has proved itself very reliable. During this procedure water containing CARELA® PEROXSIL is injected into the pipeline already during the primary flushing. Due to the increased pressure during the testing the CARELA® PEROXSIL solution is pushed into the pores of the pipe-material and flanges, couplings, etc., respectively.

Procedure after repairs

In the case of pipe bursts the pipeline should at least be left under minor pressure in order to prevent any dirt from entering the pipe after pumping off the excavation. Parts that need to be exchanged are to be rinsed with clear water and disinfected with a solution of CARELA® PEROXSIL or CARELA® FIX & DES. Following repair works – as in the case of newly laid pipelines, thorough rinsing and disinfection is required. While the disinfecting solution is injected, all hydrants present on the pipeline must be opened in order to provide for their disinfection, too. As soon as the CARELA® PEROXSIL solution is detected at the hydrant, the latter is to be closed again.

Technical control of disinfection

The filling procedure is completed if the previously calculated amount of CARELA® PEROXSIL has been used and the pipeline is filled completely.

To determine the H2O2 content, a sample is drawn at the end of the pipeline.

• Take out indicator strips, reseal tube.
• Dip indicator strip for appr. 1 sec. into sample, withdraw, shake lightly and compare with colour scale after a 15 sec. wait.
• The value shown correlates with the H2O2 content of the disinfection solution where a 100 mg/l CARELA® PEROXSIL solution still has to contain > 50 mg/l.

If the H2O2-content in the water at the drainage of the pipeline is still below that value, further disinfection solution needs to be added until the minimum H2O2 content of > 50 mg/l is reached.

Spray disinfection of surfaces

Prior to disinfection, the surfaces to be treated are to be cleaned from impurities and thoroughly rinsed with water. The concentration should always be adapted to local conditions and varies between 3 and 5% at a reaction tome of about 20 minutes. Following the reaction time the surfaces are to be rinsed with clear and germ-free water.

Removal of the disinfection solution

In the given concentrations, the CARELA® PEROXSIL solution can in be discharged into

• the municipal sewage system
• the on-site receiving water-course
• the soil by infiltration

without prior neutralization.

This can be done because CARELA® PEROXSIL consists of hydrogen peroxide and silver and quickly decays when reaction with organic substances. If discharged into fish waters, the maximum H2O2 content of 35 mg/l (corresponds to the LC50 value for Leuciscus Idus at 48 h exposition) must not be exceeded. The permissible threshold value for H2O2 in drinking water is 0.1 mg/l.

The residual content of silver is merely 10 to 20% of the silver amount allowed in water.

All approvals available.

Please contact us for prices, datasheets, service and delivery of products and equipments.