State University of New York Institute of Technology
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Blog (6) Sewage Treatment

Sewage treatment is something that is very important to the environment and the wildlife.  It is also very critical to our health.  Without sewage treatment streams and rivers and lakes would all get contaminated and could cause many health problems for people all over the world.  The process of sewage treatment take a long time and is very complex and well thought.  It may seem like it is not worth the money spent on it, but it is very important to keep the environment and the people in the world healthy.

Tertiary treatment is part of the treatment process which wastewater must go through before it can be discharged into the environment. The process includes four or five stages. These are preliminary, primary, secondary, and tertiary wastewater treatment; sometimes, this is followed by an additional step. There are several different types of tertiary treatment, all of which involve improving the quality of the waste to reduce its impact on the environment into which it is released.

Extensive sewage treatment is necessary due to the vast number of different contaminants which may be present in wastewater. Wastewater is generated by homes, businesses, and public buildings such as schools and hospitals, and in some areas, industrial plants as well. Sewage contains contaminants from all of these locations, as well as environmental waste from soil, rainwater, animal waste, and other waste which enters storm water systems.

The wastewater treatment process is a lengthy one. The preliminary treatment phase involves the removal of large pieces of debris via filtering. In primary treatment, water is piped into large tanks and allowed to settle to remove particulate solids. Secondary treatment uses microorganisms to remove more contaminating solids. Next, the wastewater goes through tertiary treatment, and finally, the it may go through a second settling process to remove any remaining particulate matter.

 

http://www.wisegeek.com/what-is-tertiary-treatment.htm


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