Chemical Feeding System
Generally, in a water treatment plant various number and kinds of chemicals are widely used. The required characteristic of water is the major factor for chemical selection. For example, activated carbon is used for taste and odor control, lime and alum are used for coagulation, chlorine is used for disinfection, and so on. Type of water plant is another factor to consider when choosing specific type of chemicals, for example, sodium hypochlorite in a single well system and gas chlorination in a large conventional treatment plant. List of most chemicals used in water treatment is shown in Table 1. To control the addition of these chemicals to water, chemical feeding systems are necessary. The design of a chemical feed system must consider whether the chemical form is solid, liquid, or gas. Other considerations are the desire for feeding, the physical and chemical characteristics of the chosen chemical, maximum and minimum water flows, and the dependability of the feeding devices.
KeywordsStorage Tank Caustic Soda Aluminum Sulfate Chlorine Dioxide Sodium Chlorite
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