Clarus Environmental Fusion Series Treatment Systems 2800/3200/3600/4000 - Manual (Page 13)

13
© Copyright 2013. All rights reserved.
corners on the outlet end of the system. This is normal. Scum,
should not be present elsewhere in the clean water storage
chamber unless the recirculation rate is too high or daily flow
exceeds the design capacity. If present, use ladle to transfer
to sedimentation chamber.
5. Sludge – Test the sludge depth using the sampling device
included in the maintenance kit. The bottom section of the
sampler includes a check valve, which opens as the unit is
lowered into the liquid. When the sampler has reached the
bottom of the chamber and the liquid level equilibrated at surface
level, lift the sampler and this action will set the check valve and
retain the sample in the tubing. Withdraw the sampler and note
the depth of settled solids within the sample. To release the
material in the unit, touch the stem extending from the bottom
section against a hard surface such as the partition wall in the
sedimentation chamber. This opens the check valve to drain
the sample. A range of 0” to 4” is preferred. Typically solids are
brown and well flocced. More than 4” (0-102 mm) is typically
due to high recirculation rates and sludge will appear black in
color. To correct sludge depths greater than 4” (0-102 mm),
decrease the recirculation rate and increase the backwash rate.
Sludge Descriptions:
Black – septic or sewer-like odor due to hydrogen sulfide and
other gases
Brown – undigested sludge is light brown, becomes darker
with digestion, lightly settled
Clear – may see a clear water layer beneath solids if gas
carries solids upwards
Flocced - settled with texture similar to a tuft of wool
Grainy - gritty or sandy texture
Gray - partially digested sludge
Milky – light in color, cloudy, not transparent
Muddy – typically well settled, often present just after startup,
may be due to infiltration
Mustard - an off-color, remnants of digestion are often
yellowish in color
White - sometimes present after new construction often due to
drywall mud
PART B: Anaerobic Chamber - collect samples from the outlet
baffle of the anaerobic chamber to be used for the following analyses:
1. Transparency – A transparency reading more than 20 cm
is preferred.
2. Scum – Should not be present unless recirculation and/or
backwash rate is too high or daily flow exceeds design capacity.
To correct, reduce the recirculation and or backwash rate.
3. Sludge – A range of 0” to 18” (0-46 cm) is preferred. Typically
brown and settled, becomes gray to black as depth and digestion
increases. More than 18” (46 cm) may require a reduction in
recirculation rate. A sludge accumulation of greater than 18” (46
cm) in the anaerobic chamber requires pumping.
PART C: Sedimentation Chambe r – collect samples from the
outlet baffle of the sedimentation chamber for the following
analyses:
1. Scum – 0” to 12” (0-30.5 cm) is common, so long as it is not
rising above the partition wall. If so, punch down using ladle.
2. Sludge – A range of 0” to 36” (0-94 cm) is common. Typically
brown and settled, becomes gray or black as depth and
digestion increases. A sludge accumulation of > 36” (94 cm)
in the sedimentation chamber requires pumping.
PART D: Storage Chamber – samples should be collected as
previously described.
1. NO
3
- N – Determined with the use of the nitrate test strips
included in the Fusion Maintenance Kit. Dip a test strip into
the water sample for 1 second, remove, allow to react for 60
seconds, and read by comparing to the color chart provided on
the container. Nitrate-nitrogen is the final step in the oxidation
of ammonia. The test strips provided range from 0-50 mg/L.
Average is 7.0 mg/L. No or low nitrate concentrations are
common in systems where nitrifying microbes are absent.
To correct high nitrate concentrations in established systems
increase the recirculation rate.
2. NH
3
- N – Determined with the use of the ammonia test strips
included in the Fusion Maintenance Kit. Dip a test strip into the
water sample and move up and down for 30 seconds, remove,
allow excess water to drain, allow to react for 30 seconds, and
read by comparing to the color chart provided on the container.
Ammonia-nitrogen is measured using low range test strips,
0-6 mg/L. Average is 3.0 mg/L. Low ammonia readings are
desirable and require no changes. To correct high ammonia
readings decrease the recirculation rate.
3. Dissolved oxygen – Follow the instructions included with the
dissolved oxygen meter. D.O. should be measured 25 inches
(635 mm) below the water level. Average is 2.0 mg/L.
4. Temperature – Most dissolved oxygen meters include a built-
in thermometer which can be used to measure temperature.
Varies with system location.
PART E: Anaerobic Chamber – samples should be collected
and analyses performed as previously described.
1. pH – The range suitable for biological activity is 6.5 to 7.5.
Recurring results outside this range should be investigated
– water source for the home or business, chemical use, etc.
2. NO
2
- N – < 3.0 mg/L is common for this chamber. Adjustments
should be based on water quality in the clean water storage
chamber.
3. NO
3
- N – < 2.0 mg/L is common for this chamber. Adjustments
should be based on water quality in the clean water storage
chamber.
4. NH
3
- N – Ammonia-nitrogen in this chamber is typically < 20.0
mg/L. If this test is desired, it should be conducted with test strips
suitable for the expected concentration. Adjustments should
be based on water quality in the clean water storage chamber.
5. Dissolved oxygen – Typically < 0.5 mg/L.
6. Temperature – varies with system location.
PART F: Sedimentation Chamber - samples should be collected
and analyses performed as previously described.
1. pH – The range suitable for biological activity is 6.5 to 7.5.
Recurring results outside this range should be investigated
– water source for the home or business, chemical use, etc.
2. NO
2
- N – < 2.0 mg/L is common for this chamber. Adjustments
should be based on water quality in the clean water storage
chamber.
3. NO
3
- N – < 2.0 mg/L is common for this chamber. Adjustments
should be based on water quality in the clean water storage
chamber.
4. NH
3
- N – Ammonia-nitrogen in this chamber is typically
FUSION ® OPERATION AND MAINTENANCE, continued
OPTIONAL WATER QUALITY ANALYSES