Why Sand Filtration to Treat Waste Water?

[caption id="attachment_5157" align="alignright" width="440"] Treatment Plant - CCA SA 3.0 Germany by Martina Nolte[/caption] Is sand filtration out of date? If not, what are its advantages? Waste water received by a treatment plant must be processed several ways before it is sent to the sand filter, disinfected and discharged to the environment. Large objects and grit are first removed. Treatment to remove nitrogen and phosphorous follows.  Suspended solids are digested and removed. The waste water is next aerated, allowed to settle and then pumped to the sand filter. Sand filtration blocks tiny particles. A separate layer of activated carbon may be included in the sand filter. Sand Filtration Operation Particle removal features two mechanisms. Particles larger than the gaps between grains of sand are blocked. Many smaller particles are absorbed…
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Novel Wastewater Treatment – Reducing Nitrogen and Phosphorus

Biology, Chemistry
[caption id="attachment_19184" align="alignright" width="480"] Wastewater Treatment Plant[/caption] The University of Kansas, in conjunction with the City of Lawrence, Kansas, has been investigating a fascinating approach to reducing nitrogen and phosphorus from wastewater. It’s a process, really, that occurs in nature, with a minimum of artificial intervention. Simply put: still water containing an abundance of “nutrients” tends to produce a proliferation of green algae. A Most Interesting Approach Why not take advantage of that fact? And so, they have. In their September 2013 Issue, Treatment Plant Operator (TPO) magazine included a well-written piece by author Doug Day that greatly intrigued me. Not long ago, I was employed as a Wastewater Operator, Level III at the local Nelson County, Virginia treatment plant. I am a retired chemist. I had rejected a career…
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