You are preparing a presentation for the next board meeting concerning a potential future project. There is a long, flat 8″ section of collection line where the wastewater has a known buildup of dissolved sulfide and a pH of 8.0. There has not been any complaints of odor but more homes are being built close to the pump station the line discharges into. You are being proactive and preparing to install odor reducing methods in the near future. What three methods would you present?