Process and system for treating waste water

Patent · Sun Jan 01 00:00:00 EST 1978

OSTI ID:863020

Olesen, Douglas E ^[1]; Shuckrow, Alan J ^[2]

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1. Kennewick, WA
2. Pasco, WA

A process of treating raw or primary waste water using a powdered, activated carbon/aerated biological treatment system is disclosed. Effluent turbidities less than 2 JTU (Jackson turbidity units), zero TOC (total organic carbon) and in the range of 10 mg/l COD (chemical oxygen demand) can be obtained. An influent stream of raw or primary waste water is contacted with an acidified, powdered, activated carbon/alum mixture. Lime is then added to the slurry to raise the pH to about 7.0. A polyelectrolyte flocculant is added to the slurry followed by a flocculation period -- then sedimentation and filtration. The separated solids (sludge) are aerated in a stabilization sludge basin and a portion thereof recycled to an aerated contact basin for mixing with the influent waste water stream prior to or after contact of the influent stream with the powdered, activated carbon/alum mixture.

• Research Organization: Battelle Memorial Institute, Columbus, OH (United States)
• DOE Contract Number: AC06-76RL01830
• Assignee: Battelle Pacific N. W. Laboratories (Richland, WA)
• Patent Number(s): US 4076615
• OSTI ID: 863020
• Country of Publication: United States
• Language: English

Related Subjects

process
treating
waste
water
raw
primary
powdered
activated
carbon
aerated
biological
treatment
disclosed
effluent
turbidities
jtu
jackson
turbidity
units
zero
toc
total
organic
range
10
mg
cod
chemical
oxygen
demand
obtained
influent
stream
contacted
acidified
alum
mixture
lime
added
slurry
raise
ph
polyelectrolyte
flocculant
followed
flocculation
period
sedimentation
filtration
separated
solids
sludge
stabilization
basin
portion
recycled
contact
mixing
prior
organic carbon
stream prior
water stream
waste water
activated carbon
treating waste
oxygen demand
chemical oxygen
total organic
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