Lime softening effect on disinfection

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Prepare for the ADEQ Water Treatment Levels 1 and 2. Study with tailored questions, in-depth explanations, and interactive quizzes. Elevate your skills and ensure exam success!

Multiple Choice

Lime softening effect on disinfection

Explanation:
Lime softening raises the water’s pH and alkalinity by adding calcium hydroxide. That higher pH environment helps disinfection in practice because it reduces the amount of substances in the water that would otherwise consume disinfectant. By removing or precipitating certain dissolved organic matter, iron, and manganese during the lime-softening process, the chlorine (or other disinfectant) used later faces less demand, leaving more disinfectant available to inactivate pathogens. In this way, the overall disinfection effect improves when lime softening increases the pH.

Lime softening raises the water’s pH and alkalinity by adding calcium hydroxide. That higher pH environment helps disinfection in practice because it reduces the amount of substances in the water that would otherwise consume disinfectant. By removing or precipitating certain dissolved organic matter, iron, and manganese during the lime-softening process, the chlorine (or other disinfectant) used later faces less demand, leaving more disinfectant available to inactivate pathogens. In this way, the overall disinfection effect improves when lime softening increases the pH.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy