L8 4th Edition states: “Employing contractors or consultants does not absolve the dutyholder of responsibility for ensuring that control procedures are carried out to the standard required to prevent the proliferation of legionella bacteria. Dutyholders should make reasonable enquiries to satisfy themselves of the competence of contractors in the area of work before they enter […]
Water Treatment Glossary
ACID A chemical compound whose aqueous solution turns blue litmus paper red, reacts with and dissolves certain metals to form salts, and reacts with bases to produce salts and water. They are capable of transferring a hydrogen ion (proton) in solution. ACUTE Describes a severe and often dangerous condition in which relatively rapid changes occur. […]
What is corrosion?
The above figure shows a typical corrosion cell for iron and its chemical reactions. Corrosion is a natural process that is thermodynamically preferable for the metal concerned as it attempts to return from a high energy state (manufactured metals required a large amount of energy create them) to a low energy natural state i.e. the […]
Testing for Legionella and Pseudomonas in the presence of copper and silver
Testing for Legionella is covered by BS7592 but in the presence of copper/silver biocides this may be incorrect. Find out why in this article.
What are CPE?
The picture above is taken from the world Health Organisation guidelines on preventing CPE infections. Carbapenemase-Producing Enterobacteriaceae (CPE) are Gram-negative bacteria that are resistant to the carbapenem class of antibiotics, considered the drugs of last resort for such infections. Every healthy person has bacteria in their gut, they do no harm in your gut and […]
What are Langelier Saturation Index and Ryznar Stability Index?
Want to know how to calculate LSI or RSI then check out this article, or you can download a calculator to do it for you.
Preventing Legionella contamination and Legionnaires’ disease outbreaks in the UK
Learn how to prevent Legionnaires’ disease using cutting edge technology
Basic chemistry for steam boilers
Water is known as a universal solvent because almost anything with dissolve into it and it is this property that leads to the problems within a steam system. Water evaporates from bodies of water such as oceans, seas, lakes and rivers; it rises into the air to form clouds from where eventually it will fall […]