Tag Archives: wastewater treatment

Big Shoes to Fill

We just saw a job announcement for the General Manager at Union Sanitary District in the greater San Francisco, California, area.  That was a little alarming to us, as we know the fellow that has held that position for many …
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Tillman Water Reclamation Plant

  As a true native of Los Angeles, California, we are always amused by efforts to “restore” the Los Angeles River.  In today’s Los Angeles Times, Sam Allen reports that “The Los Angeles Conservation Corps celebrated the second season of its “Paddle the …
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Biochemical Oxygen Demand Questions

I receive e-mails from folks every day, asking about different water quality/water treatment/ environmental issues.  I guess they have learned where they can find MOST definitive answers!  (I suppose there are other explanations, too.)  Here’s the latest: I am an …
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Sludge Pumping, Part Two

Today we will be walking through a sample calculation for sludge pumping, as a followup to yesterday’s post.  We noted that we need at least four items of information to do this calculation: influent and effluent solids levels, sludge pumping …
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Sludge Pumping

Sedimentation is one of the most widely used treatment processes in water and wastewater treatment, as well as in many other industries.  It works because it is so simple: density works!  That is, denser materials will sink in a column …
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Biochemical Oxygen Demand

We recently reported that our old blogspot site has been visited over 30,000 times.  Again, our thanks!  Over the 18 months of posts there, the one most visited was on today’s topic, Biochemical Oxygen Demand.  BOD is the most important …
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Algae and Sewage at Cal Poly SLO

If you take the time to read my bio, you’ll see that I am a graduate of Cal Poly, San Luis Obispo.  Yeah, that always get shortened to SLO.  I also grew up in that area, and my first job …
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No More Chlorine Gas?

The wastewater plant in San Jose, California is the latest in a long line of water and wastewater facilities that are abandoning chlorine gas for other forms of this life-saving disinfectant.  Chlorination of drinking water has saved millions of lives …
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