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Description
Settleability Problems and Loss of Solids in the Activated Sludge ProcessCondition: BRAND NEW ISBN: 9780471206941 Year: 2002 Publisher: John Wiley & Sons Inc (US) Pages: 192 Description: The activated sludge process is the most versatile, commonly used wastewater treatment system in North America; however, many activated sludge processes frequently experience operational problems related to poor compaction or settleability of secondary solids and loss of secondary solids from the clarifier. Eschewing the technical jargon
Condition: BRAND NEWISBN: 9780471206941
Year: 2002
Publisher: John Wiley & Sons Inc (US)
Pages: 192
Description:
The activated sludge process is the most versatile, commonly used
wastewater treatment system in North America; however, many
activated sludge processes frequently experience operational
problems related to poor compaction or settleability of secondary
solids and loss of secondary solids from the clarifier. Eschewing
the technical jargon and copious chemical equations found in the
majority of wastewater studies, Settleability Problems and
Loss of Solids in the Activated Sludge Process speaks
directly to plant operators, showing them how to identify and solve
common problems and achieve maximum efficiency.
Michael H. Gerardi?s hands-on guide addresses the most
common plant operational problems, such as increased costs, loss of
treatment efficiency, and permit violations. Using numerous tables
and illustrations, Settleability Problems provides microscopic and
analytical techniques for troubleshooting and identifying the
conditions responsible for settleability problems and loss of
solids. It includes pictures of wet mounts and smears of acceptable
and unacceptable microscopic conditions of the activated sludge and
presents corrective measures for operational problems. Chapters
include:
Undesired Filamentous Growth
Nutrient-Deficient Floc Particles
Denitrification
Slug Discharge of Soluble cBOD
Viscous Bulking or Zoogloeal Growth
Production and Accumulation of Foam and Scum
Volume II in the series, Settleability Problems will prove to be
of unparalleled value to wastewater treatment plant operators as
well as students of wastewater microbiology.
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★★★★★ 4
Get the job done & adhere well
I ordered these by mistake once when trying to order more of the normal sized and mini ones from this brand. I love their other patches and thought these would be great to have on hand too. Sometimes I feel like these don’t seem as effective as the typical 12mm patches from most brands regardless of the type of blemish I put it on. But I think they get the job done. They definitely stay on, but I prefer patches with the visible circle in the middle and transparent edges. These are nearly invisible and smooth though so easy to cover with makeup if needed.
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Reviewed in the United States on August 4, 2023
★★★★★ 5
best pimple patches!
these work really good! they come in a few different sizes in the pack as well which is nice
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Reviewed in the United States on November 14, 2024
★★★★★ 5
The perfect toy for dogs!
Style: The Duo
This is perfect when you have 2 dogs who love to play Fetch! They no longer have to chase after the same ball! The balls that come with it are very sturdy, and the launcher sends both balls far enough away so that both dogs get plenty of exercise. It’s definitely worth the price!
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Reviewed in the United States on May 26, 2026
★★★★★ 5
PERFECT RETRIEVING TOY
Style: EcoFetch
You can barely whip it and it sails far and fast. This is the perfect retrieving toy for my GSP. She's used to average and we now have a small yard, so the dog park is where she gets to run hard and fast. You can also throw tennis balls with it, which is a plus for when her sister steals her ball.
5 star fun!
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Perfect for puppy play
Style: EcoFetch
This is perfect. Works great for a smaller yard and the ball holds up to puppy teeth!
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Reviewed in the United States on May 18, 2026
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