The reason for me doing this report is because I could not attend
             class enough to grasp the concept of Wastewater Treatment. This report is
             an overview of each stage of the treatment of sewage. I have included a diagram of a typical sewage plant.
             The wastewater that enters a treatment plant contains debris that
             might clog or damage the pumps and machinery. The material is
             removed by screens, and is burned or buried. The wastewater then passes
             through a comminutor (grinder), where all the organic material such as
             leaves are mushed smaller so that they can be removed later.
             Back in the day, long narrow channel-shaped settling tanks, known
             as grit chambers, were used to remove all the inorganic substances like
             sand, silt, gravel, and cinders. These chambers were made to allow
             inorganic particles 0.008 in. or bigger to settle at the bottom while the
             smaller particles and most of the organic material that remain in
             suspension pass through. Today, spiral-flow aerated grit chambers with
             hopper bottoms, or clarifiers with automatic scrapper arms are used. The
             grit is removed and disposed of as sanitary landfill. Grit build up can reach
             from 3 to 8 cubic feet per1 million gallons of wastewater.
             With the grit removed, the wastewater goes into a sedimentation
             tank, where the organic materials removed. The method of sedimentation
             can remove about 20 to 40 percent of the biochemical oxygen demand
             and 40 to 60 percent of the suspended solids. The big boys in the industry
             use a chemical process known as coagulation and flocculation in the
             sedimentation tank. I really don't know much about this subject so I'm
             The alternative to sedimentation is a treatment called flotation, in
             ...