Which class of treatment unit supplies effluent to a Type A dispersal bed?

Which class of treatment unit supplies effluent to a Type A dispersal bed?

• A. Class II treatment unit
• B. Class III treatment unit
• C. Class IV treatment unit
• D. Class I treatment unit

Answer: (C)

Type A dispersal beds require effluent that has been highly treated to minimize solids, organics, and pathogens, reducing the risk of clogging and environmental impact. Among the treatment unit classes, the highest level of treatment is provided by Class IV, which delivers advanced treatment (often secondary treatment with disinfection and polishing) to produce the cleanest effluent. That higher-quality effluent is necessary for Type A beds, making Class IV the appropriate source. Lower classes deliver less treatment and would not meet the quality standards needed for a Type A bed, which is why they are not suitable in this pairing.

Type A dispersal beds require effluent that has been highly treated to minimize solids, organics, and pathogens, reducing the risk of clogging and environmental impact. Among the treatment unit classes, the highest level of treatment is provided by Class IV, which delivers advanced treatment (often secondary treatment with disinfection and polishing) to produce the cleanest effluent. That higher-quality effluent is necessary for Type A beds, making Class IV the appropriate source. Lower classes deliver less treatment and would not meet the quality standards needed for a Type A bed, which is why they are not suitable in this pairing.