Before revision: A schematic cross-section of the contact face of the bed of media in a trickling filter Broken trickling filter unit at the sewage treatment plant in Norton, Zimbabwe, showing importance of maintenance to prevent structural failure Typically, sewage flow enters at a high level and flows through the primary settlement tank.
After revision: settledA schematic cross-section of the contact face of the bed of media in a trickling filter Broken trickling filter unit at the sewage treatment plant in Norton, Zimbabwe, showing importance of maintenance to prevent structural failure Typically, sewage flow enters at a high level and flows through the primary settlement tank.