INTRODUCTION
The Clearstream System is one of the finest aerobic wastewater systems available
today. Our system converts the sewage from your residence or business into a clear,
odorless liquid. This high degree of treatment is accomplished at a remarkable low
operating cost per month. The system has been simplified over the years to make it as
inexpensive to operate and as low in long term maintenance as possible. Homeowners
who have lived with the nuisance off a septic odor lingering in their neighborhood will truly
appreciate the pleasure of owning a Clearstream System. Clearstream Model N and NC*
Systems used without or, in conjunction with, Clearstream Model 1100 Spin Filter comply
with NSF Standard 40 for Class1 systems.
PROCESS DESCRIPTION
The Clearstream Wastewater Treatment System operates in the extended aeration
mode of the activated sludge process. Wastewater enters the aeration chamber of the
system through a 4” Sch. 40 PVC inlet pipe. The wastewater is then mixed throughout the
aeration chamber by releasing compressed air near the bottom of the chamber through a
fine bubble diffuser. The rising air bubbles transfer oxygen to the wastewater which allows
aerobic organisms to thrive and ultimately decompose the incoming waste matter. The
turbulence caused by the rising air bubbles also creates a mixing pattern which keeps
the sludge in suspension. As incoming wastewater enters the aeration chamber, existing
“mixed liquor” from the aeration chamber is displaced into the bottom of the cone-shaped
clarifier. The clarifier chamber allows the water to still so that suspended solids in the
“mixed liquor” can settle back into the aeration chamber for further biological breakdown.
The remaining clear water in the upper zone of the clarifier chamber is then discharged
through the surge control weir and out of the 4” Sch. 40 outlet pipe.
When properly loaded and maintained, the process allows the Clearstream Wastewater
Treatment System to provide years of satisfactory service for the consumer. Clearstream
Models N and NC* systems meet the performance requirements of NSF Standard 40
Class 1 with a 30-day average of <25mg/l CBOD and <30mg/l TSS. Actual NSF test
results used to determine if Clearstream met Standard 40 requirements averaged 6mg/l
BOD5 and 9 mg/l TSS. When Clearstream Model 1100 Spin Filter Assembly was utilized in
the Standard 40 Test the results averaged 5mg/l BOD5 and 6mg/l TSS.
*NC models are concrete
NCD 1000-1500 SERIES OWNERS MANUAL
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