Wastewater Treatment Plant, Process Information.
https://www.youtube.com/watch?v=6wsaAlKO7TE&t=743s
Water that is no longer suitable for use of any perpose like bathing water,Kitchen water, toilet water, agriculture water & industrial water means it is contaminates with Bacteria. Contaminates is the process of impurity (Chemical substances like liquid, gas or solid) or some undesirable element that spoils, infects makes unfit for use. when wastewater came to plant area, from raw wastewater to remove iteam such as broken bottles, sanitary items, and big subestance separate by screening system .after that wastewater went to grite chamber at this stage sand are removed, after that send to primary stage, at this stage around 35% of total pollutant are removed .When the speed of the water flow through primary stage tank the suspended solids will gradually sink to the bottom, where thay form a mass of solids called raw primary biosolids formerly sludge. read more about this please CLECK HEAR.