User:Yazanaboissa/sandbox

There are many contaminants in the sewage water such as animal waste, and oil and grease. And these contaminants increase the pollution for the water and the parameters that refer to that are (BOD, COD, and TSS). In the past the water resources was contributing in cleaning the sewage water where the sewage system ends. We was doing this because the self-purification using algae. But the rapidly increasing in population makes this impossible to stay in this habit because of the leaked in oxygen dissolved in water which is used to destroy the organic materials that causes to kill the aquatic animals and distribute stink smell. Therefore it has been necessary to create something that solve the problem cause by sewage water before pouring it in the water resources and causes dangerous to environment and these are sewage water systems. And due to development in the world it has been found many levels for treatment the sewage water according to use of produced water like for agriculture, industrial, human or drinking. So for every use there are standard properties for water. Household water has very much oil and grease, and these go to the sewage water system and we cannot pour it in the environment because it is dangerous and causes diseases for humans and animals. The contaminants in the sewage pipes solidify if it remains for a long time and causes stricture to the pipes, so it create anaerobic circumstances and consequently causes stink smell and poisoning for water milieu. The most important problems that we have face in the treatment plant are: 1-	It forms a surface that prevents gas swap with surrounding environment, so it causes decrease of oxygen remaining in the wastewater and that affects to the efficiency of the sewage treatment plant. 2-	Oil and greases adhere to the equipment of the plant like pumps, filters and pipes. So it is important to separate these materials from sewage water before going into sewage water system and then we treatment them to produce raw materials to be able for using in industries. The principle ways to treatment the sewage water depends on: a-	The method of treatment of wastewater depends on the way of biology part of the sewage water system, such as : 1-	Activated sludge process: This is the most distribution methods in the world. 2-	Natural pounds: we have discussed previous which is done by (anaerobic pounds, facultative pounds, maturation pounds b-	Every sewage water system contains of: 1.	Line for water treatment 2.	Line for sludge treatment Sometimes the treatment unit contains the both part built-in. c-	We do not consider that the treatment unit has done its mission until it treatments its waste completely or relatively safe. d-	The treatment of sewage water system is induction to the process done in the water resources i.e. self-purification using algae. e-	Removing the contaminants from sewage water depends on the nature and type of contaminant As we read before the most important decision that the designer engineer face is the chosen of the method of the treatment according to: -	Productivity of plant -	Constable of plant -	Requirements of surrounding environment.