Chlorine as a Biocide
- Muthusamy Senthilkumar
- Apr 8, 2021
- 2 min read
Good morning. Welcome to the new topic on " Chlorine as a Biocide". Many of us have learnt in school that chlorine acts as bleach and is used to kill germs in the water. Chlorine is a strong oxidiser and can readily react with most organic matter. Microorganisms are made up of material that is most vulnerable to chlorine present in water.
Chlorine is generally added to the water stream either as chlorine gas or as hypochlorite solution of the desired concentration using controlled volume pumps.
Chlorine added to water reacts in the following order:
a. reaction with inorganic metals/compounds
b. amines
c. microorganisms
The effectiveness of chlorine added to water as biocide depends upon the presence of interfering inorganic substance and amines. The term chlorine demand includes the total chlorine required to react with inorganic compounds, amines and the microorganisms which are the actual target.
Chlorine added to water as a biocide has two main objectives:
Kill the microorganism and make it suitable for drinking ( drinking water treatment)
Kill/prevent the growth of algae and bacteria in the water stream ( scale and corrosion prevention)
In industry, chlorine dosing is adapted for controlling the growth of algae and bacteria to protect the pipelines from scaling and corrosion. This method is largely used in cooling water circuits ( cooling water basin and circulating pipes) where the tendency of algae growth is high.
Chlorine dosing is controlled manually by looking into periodic samples analysed in the laboratory or automatically using ORP or free chlorine analysers in the water circuit where chlorine is dosed.
Excessive chlorine dosing results in higher free chlorine concentration in the water stream and the free chlorine can attack the base metal of piping creating chemically induced corrosion problems.
Hence it is important to monitor and control the chlorine dosing in any water stream. If you have any specific queries related to the design, sizing of chlorine dosing systems please write to engineers at Aalosanai.com
Chicory (Cichorium intybus) is a perennial herbaceous plant native to Europe but now widely cultivated across the world. It is known for its bright blue flowers and has a long history of use both as a food source and in traditional medicine. The plant’s roots are particularly significant; they are commonly roasted and ground to be used as a caffeine-free coffee substitute or additive, especially in parts of Europe and the southern United States. Chicory roots are rich in inulin, a type of prebiotic fiber that promotes healthy gut bacteria and supports digestive health.
In addition to its culinary uses, chicory offers several health benefits. The inulin found in its root is known to improve bowel function, aid in calcium…
Silicone foam dressings are advanced wound care products designed to promote healing while providing comfort and protection. These dressings feature a soft silicone adhesive layer that gently adheres to the surrounding skin without sticking to the moist wound bed, minimizing pain and trauma during dressing changes. The foam layer absorbs exudate (wound fluid) effectively, maintaining an optimal moist environment for healing while preventing maceration of the surrounding tissue. Silicone foam dressings are often used for moderate to heavily exuding wounds such as pressure ulcers, leg ulcers, diabetic foot ulcers, and surgical wounds.
One of the key advantages of silicone foam dressings is their ability to conform to body contours, making them ideal for use on irregular or mobile areas. They are…
WebAsha Technologies provides Ethical Hacking Training in Pune that blends theoretical knowledge with hands-on experience to develop proficient cybersecurity professionals. Our training covers key aspects such as penetration testing, vulnerability assessment, and ethical hacking methodologies to ensure a deep understanding of security systems.