Which factor does NOT affect chlorination effectiveness?

Chlorination effectiveness is influenced by several key factors, including contact time, effluent pH, and effluent temperature. Each of these elements plays a critical role in how effectively chlorine can disinfect water.

Contact time refers to the duration that chlorine is in contact with the water being treated. The longer the chlorine has to interact with the pathogens, the more effective the disinfection process generally becomes. Thus, a minimum contact time is essential to ensure proper chlorination.

Effluent pH is another crucial factor, as the effectiveness of chlorine decreases in highly acidic or highly alkaline conditions. Chlorine is most effective in a neutral pH range. If the pH is outside this optimal range, the disinfection capacity of chlorine can be significantly reduced.

Effluent temperature also impacts chlorination effectiveness. Higher temperatures typically increase the reaction rates of disinfectants, enhancing chlorination efficacy. Conversely, lower temperatures can slow down these reactions, making disinfection less effective.

The size of the plant, however, does not directly impact chlorination effectiveness. While a larger plant may have increased water throughput or different operational procedures, the fundamental chemical processes involved in chlorination remain constant regardless of the plant's physical size. Therefore, the plant size is not a determining factor in the