Clarus ZF-450 Manuel du propriétaire - Page 12

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FUSION

The following steps are to be completed during each

6-month inspection. All information collected during the

inspection is to be recorded on the Maintenance and Service

Report (CL0059). Begin the inspection by recording the date,

arrival time, weather conditions, purpose of the visit, water

use, model number, serial number, the presence or absence

of a septic tank, and the system owner and service provider

information in the space provided on the report.

GENERAL OBSERVATIONS

1. Are any odors present? There should be no odor

with the lids closed, if properly sealed. With lids

removed, a septic or sewer-like odor is indicative

of poor treatment and is common immediately after

startup due to hydrogen sulfide and other gases.

A well-operating system will have a musty, earthy

smell similar to wet peat moss.

2. Is there evidence of high water? Typically indicated

by a water level above the black wall markings

and above the "0" graduation on the partition

wall stickers. May also be indicated by debris on

partition walls.

Is there excess foam formation? Foam may be

present during an inspection. Brown foam indicates

bacterial buildup following startup. White foam

is due to detergent use. Neither is a problem if

occurring intermittently. Detergent-based foam

will often be accompanied by low transparency

readings.

4. Is there residue build-up on piping? Typically

indicated by gray or black residue (dried foam)

on aeration chamber piping.

5. Is there even and vigorous bubbling? Bubbles

surfacing in the aeration chamber should be even

across the entire chamber. If uneven, cleaning steps

should resolve this issue.

REQUIRED WATER QUALITY ANALYSES

1. Transparency – Measures the ability of the water to

transmit light. Using the ladle, fill the transparency

tube with a water sample collected from the clean

water storage chamber. Looking down through the

water column, slowly drain the transparency tube

using the valve on the flexible hose until you can

first distinguish between the black and white colors

on the secchi disk in the bottom of the tube. When

the secchi disk is visible, close the valve and read

the transparency (in centimeters) on the side. Dirty

water samples transmit less light and result in a lower

transparency. A transparency reading > 20 cm is

preferred and 34 cm is average. Low transparency

may be due to a lack of biological activity as in a

young system, a recirculation rate that is too high,

or a system influent high in detergent concentration.

To correct low transparency readings not caused by

detergent, decrease the recirculation rate. Detergent

based problems may require consultation with owner.

OPERATION AND MAINTENANCE

2. Scum – Very small amounts of scum may accumulate

3. Sludge – Test the sludge depth using the sampling

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

2. Scum – Should not be present unless recirculation

3. Sludge – A range of 0" to 15" (0-38 cm) is preferred.

in the 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.

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

20 cm is preferred.

and/or backwash rate is too high or daily flow exceeds

design capacity. To correct, reduce the recirculation

and or backwash rate.

Typically brown and settled, becomes gray to black