Which screening method is effective in preventing fish and debris from entering treatment facilities?

Bar screens are specifically designed to filter out larger objects such as fish and debris from entering water treatment facilities. Their construction typically involves a series of parallel bars with spaces in between that allow water to pass through while capturing larger items. This is particularly effective because the bars can be spaced appropriately to target the size of debris that could cause issues in treatment processes.

Overhead screens, while they can provide some level of screening, are generally not as robust or specific in dealing with large biological materials like fish. Rotating screens can be effective for certain applications but are usually used for smaller particles or in specific circumstances rather than the broader application of preventing larger debris from entering treatment areas. Gravity screens also function differently, relying on the weight of debris to settle out rather than actively capturing larger objects before they enter a treatment facility.

Overall, bar screens are the most direct and effective solution in this context, ensuring that larger contaminants are filtered out before they can disrupt the treatment process.