FC: Water Treatment
1: What is water treatment? | Water treatment is a process of making water suitable for its use or returning it to its natural state. Therefore water treatment is required before and after its use. The treatment used depends on whatever you are using it for.
2: How does water treatment work? | There are four steps to the process of waste water treatment. There is preliminary treatment, biological treatment, membrane clarification and disinfection. Preliminary treatment filters out solids (rocks, rags, plastics, rubbish, etc.) and smaller solids (sand and gravel) which are normally sent to landfills. Wastewater is filtered down to small sized particles at the CRD's Clover Point and Macaulay Point Facilities, where preliminary treatment is currently in process. The filtered wastewater then continues uninterrupted to outfalls, where it is released through two deep ocean outfalls into the marine waters.
3: Primary treatment filters wastewater, and performs some primary treatment to take out crude solids and skim off grease, oil and fat. Wastewater sits in settling tanks, which are designed to hold the wastewater for many hours. During that time, most of the heavy solids fall to the bottom of the tank, where they become a thick slurry known as primary sludge. The material that floats at the top is also skimmed from the surface of the tanks. Both the primary sludge and skimmed material are typically pumped or trucked to a solids treatment processing plant. Biological (or secondary) treatment removes dissolved oxygen-demanding organic substances by using bacteria to convert compostable organic matter into bacterial cells. The wastewater is then broken down by separating treated liquid from grown bacterial cells using gravity. Bacteria and sludge is then either processed onsite or sent to a separate solids treatment facility.Tertiary treatment further treats effluent to remove nitrogen, phosphorus, fine suspended particles and microbes, and to kill disease-causing organisms and viruses. It is possible to treat effluent in this phase, resulting in a non-potable recovered water source, which can be used again in many ways.
4: Preliminary treatment | membrane clarification
5: disinfection treatment | Biological treatment
7: real life example: sewage plants clean water filled with bacteria to protect animals and their habitats and the human race from those germs. they do this because we are near water almost every single day of their lives. They try to make it more safer for us. | how it affects wild life and humans: A system that fails to treat sewage can also allow remaining nutrients to reach the closest lakes and streams allowing scum and weed to grow. These things may make the lake dirty for swimming and boating, and it can affect the water quality for fish and other wildlife habitats. As plants die,and settle at the bottom, and decompose, they use oxygen that the fish need so they can survive. various cleaning products and other chemicals used can be toxic to humans and other wild life.