Well Maintenance & Rehabilitation

Wells are an often neglected part of a water treatment regime.

The Osorno well rehabilitation method removes scaling, iron deposits, and persistent bacteria (e.g. iron bacteria or bacteria hidden in biofilms). Osorno’s method is more efficient and safer than commonly used methods such as concentrated acid (commonly hydrochloric or “muriatic” acid) or shock chlorination.

Osorno discourages shock chlorination because:

  • Chlorination produces chlorinated organic compounds that are persistent in the environment, and harmful to animals and humans as many of them are carcinogenic;
  • The high pH of hypochlorite solution (“bleach”, “liquid chlorine”) causes precipitation of calcium ions in the form of lime which can shield bacteria from the disinfectant. This is obviously counterproductive.

Osorno discourages the use of concentrated acid because:

  • Its fumes are easily inhaled by the operator, thus posing a significant health risk;
  • It is highly corrosive, even with stainless steel;
  • Scale in wells usually contains deposited manganese oxide that can react with the acid to form dangerous and corrosive chlorine gas.

Well Cleaning

Shock chlorination raises both pH and the oxidation-reduction potential (ORP) of well water dramatically, thus increasing scaling within a  well.  Osorno’s well cleaning solution, however, lowers the pH to about 2, and lowers ORP into the reducing range. Under these conditions lime scale dissolves, and iron and manganese oxides are reduced to soluble and almost colourless compounds.

The well cleaning solution also disinfects the well, although not as strongly as Osorno’s Well Disinfectant (below). If both well cleaning and disinfection are required, well cleaning must always be the first step.

The chemicals used in this formulation are all food grade, so that any traces left in the well or in the pipe system pose no health risk.

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Well Disinfection

With regular maintenance of a well, there is often no need for well cleaning, and well disinfection will often suffice. Osorno’s well disinfectant is based on chlorine dioxide (not to be confused with chlorine), which is very effective at destroying bacteria including iron bacteria that are notoriously difficult to kill. Chlorine dioxide even destroys those bacteria hidden in biofilms.

Osorno’s well disinfection solution also cleans the well, although not as efficiently as Osorno’s Well Cleaning solution.

The chemicals used in this formulation are all food grade, so that any traces left in the well or in the pipe system pose no health risk.

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