Klargester BIODISC BD User guide

GL0014K
OWNERS HANDBOOK
MANAGED FLOW BIODISC
BD, BE, BF, BG, ND, NE, NF, NG
Klargester Environmental
College Road North, Aston Clinton, Aylesbury, Buckinghamshire, HP22 5EW
Tel: [phone] Fax: [phone]
Web site: www.klargester.com Email: [email protected]
BioDisc is the registered trademark of Klargester Environmental.
Issue Description Date
01 CC525 October 2007
Attached Documents:
510101 BD & BE Single Phase Panel Wiring Diagram
510031 BF Single Phase Wiring Diagram
The following wiring diagrams are provided with in the control panel housing
.
If additional copies are required contact Klargester.
510009 BD & BE Single Phase Control Panel (Option L/W)
510030 BD & BE 3 Phase Control Panel Wiring Diagram
510003 BD & BE 3 Phase Alarm Control Panel Wiring Diagram
510017 BF Single Phase Alarm Control Panel Wiring Diagram
510012 ND & NE Single Phase Panel Wiring Diagram
510013 ND & NE Single Phase Panel (Option L/w)
510006 ND & NE 3 Phase Panel Wiring Diagram
510007 ND & NE 3 Phase Alarm
510018 Independent Loss of Rotation Alarm
®

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 2
HEALTH AND SAFETY
These warnings are provided in the interest of safety. You must read them carefully before installing
or using the equipment.
It is important that this document is retained with the equipment for future reference. Should the equipment be
transferred to a new owner, always ensure that all relevant documents are supplied in order that the new owner
can be acquainted with the functioning of the equipment and the relevant warnings.
Installation should only be carried out by a suitably experienced contractor, following the guidelines supplied
with the equipment.
We recommend the use of a dust mask and gloves when cutting GRP components.
A qualified electrician should carry out electrical work.
Sewage and sewage effluent can carry micro-organisms harmful to human health. Any person carrying out
maintenance on the equipment should wear suitable protective clothing, including gloves. Good hygiene
practice should also be observed.
Covers must be kept locked.
Observe all hazard labels and take appropriate action to avoid exposure to the risks indicated.
The correct ongoing maintenance is essential for the proper operation of the equipment. Service contracts are
available and recommended. Please contact Klargester for details of your local service provider.
Should you wish to inspect the operation of the equipment, please observe all necessary precautions, including
those listed below, which apply to maintenance procedures.
BioDisc units contain rotating machinery and associated drive chains. Ensure that you are familiar with the safe
working areas and accesses. Ensure that the working area is adequately lit.
The power supply to the equipment must be isolated at the control panel(s) before lifting the covers. Where a
specific maintenance procedure requires the equipment to be running with the covers off, all care must be taken
to avoid contact with moving parts and electrical components or conductors. Drive guards must be replaced and
secured if removed during maintenance.
Once power has been isolated, the control panel must be kept locked shut to avoid accidental re-connection
whilst work or inspection is being carried out.
Use only the designated access walkways. Do not walk on the cover or deep well safety mesh(es).
Take care to maintain correct posture, particularly when lifting. Use appropriate lifting equipment when
necessary. Keep proper footing and balance at all times. Avoid any sharp edges.
Desludging should be carried out by a licensed waste disposal contractor holding the relevant permits to
transport and dispose of sewage sludge. The contractor must refer to the desludge instructions in this
Handbook, a copy of the instructions are fastened under the covers.
There are separate installation guidelines available to provide full instructions for installations. We recommend
the unit is commissioned by an approved engineer.

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 3
ETS Ltd
Trading as: Klargester Environmental
College Road North
Aston Clinton
Aylesbury
Buckinghamshire
HP22 5EW
United Kingdom
07
EN 12566-3
BA - BF BioDisc
Hydraulic daily load: 1.2m³/day - 10m³/day
Material: GRP Glass Reinforced Plastic
Watertightness (water test): Pass
Structural Calculation: Pass
Treatment efficiency: COD: 89%
BOD5: 96%
SS: 95%
Total P: 48%
NH4: 89%
Total N: 46%
Electrical consumption: 1.3 kWh/d - 3.1 kWh/d
Sludge production: 0.21 litres per person per day

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 4
CONTENTS
Page
HEALTH AND SAFETY...........................................................................................2
DECLARATION OF CONFORMITY........................................................................3
INTRODUCTION......................................................................................................4
SECTION 1 - TECHNICAL DATA ...........................................................................5
SECTION 2 - DESCRIPTION AND PROCESS.......................................................6
Introduction...............................................................................................................6
Primary Settlement Tank..........................................................................................6
Biozone ....................................................................................................................6
Final Settlement Tank ..............................................................................................7
Cover........................................................................................................................7
Control Panel............................................................................................................7
Optional loss or rotation alarm ................................................................................8
Alarm sensor adjustment .........................................................................................8
SECTION 3 - INITIAL START UP PROCEDURE .................................................8
Introduction ..............................................................................................................8
Water........................................................................................................................8
Electrical...................................................................................................................8
BioDisc.....................................................................................................................9
Automatic Grease Cartridges...................................................................................9
Switch On.................................................................................................................9
Running Checks.......................................................................................................9
Optional Loss of Rotation Alarm...............................................................................9
Process Initiation....................................................................................................10
SECTION 4 - OPERATION....................................................................................10
Introduction.............................................................................................................10
Do’s and Don’ts......................................................................................................10
Desludging and Maintenance.................................................................................11
SECTION 5 - MAINTENANCE...............................................................................12
Introduction.............................................................................................................12
Customer Maintenance Checks.............................................................................12
Automatic Re-Start After Power failure ..................................................................12
Sludge Removal.....................................................................................................12
Desludge Volumes.................................................................................................13
Trouble Shooting Guide .........................................................................................15
INTRODUCTION
Thank you for choosing a Klargester product. This manual will help you to keep it operating
efficiently over a long service life. Please read this manual thoroughly, preferably before
installation.
This manual should be referred to by :
a) The installer
b) The electrician
c) The commissioning engineer
d) The maintenance engineer
e) The desludge contractor
f) The owner/user

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 5
Klargester offer various maintenance packages and extended warranty contracts offering
peace of mind for the long term operation of the equipment. Details on request. We
recommend that the unit is commissioned by an approved engineer before use.
SECTION 1
TECHNICAL DATA
Fig. 1
(1) Domestic housing applications only. Consult Klargester for other applications.
(2) For ½ hour max. in any 2 hour period.
All surface water must be excluded. Units are individually assessed with regard to sewage load and
composition. E.g. Proportion of laundry waste water from commercial premises. Please contact
Klargester if you plan any changes that might affect your sewage output.
UNIT BD/BE/ND/NE BF/NF BG/NG
Width A mm 2450 2450 2450
Length B mm 3340 4345 5235
Inlet Invert depth C mm 600 1100 600 600
Outlet Invert Depth D mm 685 1185 700 700
Depth Below Ground E mm 2425 2925 2420 2420
O/A Height F mm 2830 3330 2825 2825
UNIT BD ND BE NE BF NF BG NG
Standard Power Supply 1 phase
Optional Power Supply 3 phase
Drive Motor Rating 1ph/3ph watts 55 75 110 180
Sludge Return Pump Rating watts N/A 480 N/A 480 N/A 480
Maximum Daily BOD(1) kg 1.5 1.2 2.1 1.62 3.0 2.4 4.2 3.72
Maximum Daily Flow m35 4.0 7 5.4 10 8.0 14 12.4
Peak Flow Rate (2) m3/hr 0.63 0.5 0.88 0.68 1.25 1.0 1.75 1.56

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 6
SECTION 2
DESCRIPTION AND PROCESS
(1) INTRODUCTION
BioDisc systems are designed to accept crude domestic sewage and produce an effluent of
suitable quality for discharge to a watercourse or soakaway system, subject to the approval
of the appropriate regulatory authority. BioDiscs in the range BD to BF and ND to NG are self
contained single piece units.
The main casing and cover of the BioDisc are constructed of Glass Reinforced Plastic (GRP).
All steel parts are stainless, galvanised or surface coated to protect against corrosion. The
discs are vacuum formed polyethylene.
Fig. 2 - General Arrangement of BioDisc System
(2) PRIMARY SETTLEMENT TANK
Crude sewage enters the Primary Settlement Tank (PST), through an inlet pipe in the side
of the BioDisc. Solids are settled out and retained for periodic desludging.
The PST is designed to have sufficient capacity to accept high flows over a short period and
the patented Managed Flow System allows the liquid level to fluctuate to accommodate
such surges.
(3) BIOZONE
The Biozone contains the Rotor, which consists of corrugated polyethylene discs mounted
on a horizontal shaft, supported by a bearing at each end. The bearings are either plastic,
requiring no lubrication or roller bearings continuously lubricated by pressurised grease
cartridges. The Rotor is slowly rotated by an electric motor and reduction gearbox with a
chain or belt drive. Chain drives are continuously lubricated by a pressurised grease
cartridge and brush assembly.
The surface of the discs becomes colonised by naturally occurring micro-organisms, which
form a visible coating known as the Biomass. As the discs rotate, the Biomass is alternately

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 7
submerged in the settled sewage and aerated by exposure to the atmosphere. Under these
conditions the Biomass can efficiently break down the pollutants in the sewage.
A flat GRP walkway along either side of the Biozone contains a number of ports which give
desludge access to the PST.
The Biozone and discs are divided into two stages, separated by a fixed baffle. Settled
sewage enters the first stage of the Biozone through a submerged transfer slot. The liquid
level in this stage will fluctuate in the same way as in the PST and the bacteria are exposed
both to the fluctuating liquid level and to fluctuations in sewage strength and concentration
of domestic chemicals such as washing powders. One of the functions of this stage is to
minimise the effect of such shock loads, which could otherwise inhibit the process.
The second stage of the Biozone is hydraulically sealed from the first stage and maintains a
constant liquid level. Liquid is transferred from the first to the second stage, at a steady
rate, by a series of buckets attached to the rotor. This controlled flow of effluent is at the
heart of the patented Managed Flow System, which promotes healthy and balanced growth
of the micro-organisms essential for efficient treatment.
Excess Biomass (also referred to as humus) sloughs off the surface of the discs and passes
with the flow, to the Final Settlement Tank.
(4) FINAL SETTLEMENT TANK
The Final Settlement Tank (FST) is situated under the drive motor and receives a steady flow
of treated effluent from the Biozone. The humus settles out and is retained for periodic
desludging.
N Range units include a timer controlled pump return sludge system so as to enable the
settled humus to be periodically returned to the PST, for co-settlement. Final treated effluent
discharges from the FST through a dip pipe. The FST is covered by a pedestrian duty
walkway which allows service access and guards against the possibility of personnel falling
into the FST.
(5) COVER
A GRP cover is provided to guard against injury to personnel and to protect the BioDisc from
the weather. Please do not walk over the covers: they are not weight bearing. The cover
sections are secured by latches, operated by keys supplied with the unit.
(6) CONTROL PANEL
The weatherproof control panel should be mounted adjacent to the BioDisc. There are three
panel types that can be fitted, all with current overload protection, power isolation function
and automatic re-start following a power failure. (See Section 5, paragraph (3)).
All N range control panels also contain a timer and relay to control the operation of the sludge
return pump and current overload protection for the pump motor.
1. Standard Control Panel.
2. Alarm Control Panel. This replaces the Standard Control Panel and includes a Loss of
Rotation (LOR) Alarm, which activates after a delay of 2-3 minutes if the rotor stops turning
for any reason, other than a failure in the power supply. It has stop and run lights on the
door, and an optional alarm beacon on top. An additional remote slave beacon may also
be fitted. Loss of rotation of the rotor is sensed by a reed switch mounted near the BioDisc
motor in conjunction with a magnet attached to the rotor.

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 8
Optional Loss of Rotation Alarm
The alarm sensor (reed switch) is mounted
adjacent to the motor/gearbox assembly. The
sensor may be supplied out of position, to allow for
possible minor rotor movement during transport.
Check the sensor position and if necessary adjust
to provide a gap of 5 - 10 mm between the sensor
and the actuator magnet.
- Alarm Sensor Adjustment
(position may vary)
3. Independent Remote Alarm Panel. This is fitted
in addition to the Standard Control Panel, and is
suitable for any indoor location, up to a maximum
of 100 metres from the BioDisc. It would usually
be connected to a power supply independent of
the BioDisc, and works in a similar manner to the
Alarm Control Panel. It has an audible alarm,
with mute button and a warning light.
SECTION 3 INITIAL START UP PROCEDURE
(1) INTRODUCTION
Every care is taken to ensure that all mechanical components are correctly fitted, adjusted
and lubricated prior to leaving the factory. However, subsequent handling during
transportation and installation may result in the movement of components and a subsequent
need to re-adjust prior to starting the unit. If on inspection, you consider that any
components require adjustment, please contact Klargester to request a commissioning
service.
Once the unit has been installed it should be left filled with water. Please switch on the
motor, following the procedure below and leave the unit running, even if there is no sewage
being fed into the plant. If the unit has been installed with no operational power supply, then
remove the motor/gearbox unit and store it in a dry or heated environment until such time as
the unit is ready for permanent operation. The motor/gearbox unit should then be replaced
and the chain tensioned by Klargester.
We recommend that the system should be commissioned by Klargester; details on request.
Where an immediate start-up is necessary, the following basic procedures should be carried
out. Ensure that all Health and Safety precautions are observed.
(2) WATER Check that the BioDisc is full of water to the outlet level.
(3) ELECTRICAL Check that the power supply is connected to the control panel. Check
that all electrical components and conductors are earthed.

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 9
(4) BIODISC
Check that the BioDisc is in order, with no obvious damage or misalignment of parts. If any
possible problems are discovered, contact Klargester.
Check that all electrical components: Drive Motor, Sludge Return Pump and LOR Alarm
sensor, (where applicable) are connected to the Control Panel.
Units with FST Sludge Return System only: Check that the Sludge Return Timer in the
BioDisc Control Panel is set correctly, as indicated on the wiring diagram.
(5) AUTOMATIC GREASE CARTRIDGES
Where pressurised grease cartridges are fitted (to chain drives and/or roller bearings)
these must be activated before the unit
is started.
a) Turn the control knob and its linked dial
until the figure 6 is against the arrow on
the casing, as in Figure 3 (this should
give a lubrication period of 12 months at
the temperature in the BioDisc).
b) Depress the red button. This secures the
setting and releases the control knob
from dial.
Rotate the knob clockwise to activate the
unit.
(6) SWITCH ON
Open the Panel. Put the isolating switch and/or circuit breaker(s) into the “on” position.
Close the panel and lock it, if applicable. Note: If the unit is fitted with a the sludge return
pump, this should start and run for the set time when the unit is switched on.
(7) RUNNING CHECKS
Check that the rotor is running smoothly in the correct direction of rotation and is not
contacting any part of the fixed structure.
Check that the forward feed buckets are discharging correctly from the first to second stage
Biozone.
(8) OPTIONAL LOSS OF ROTATION ALARM
Where fitted, check operation of the Loss of Rotation (LOR) Alarm as follows:
a) Open the Control Panel and isolate the drive motor whilst maintaining power supply to
the alarm circuit. For units with a combined Alarm Control Panel this can be done either
by removing the motor fuse or by operating the motor overload trip (refer to wiring
diagram). Where a remote independent alarm is fitted, simply isolate power supply at
the BioDisc control panel. After a delay of 2-3 minutes the alarm should activate.
b) Push the reset button on the front of the Panel. The alarm beacon or sounder should
cease and the red indicator light on the panel front should remain illuminated.
c) Re-connect power to the drive motor and close the Control Panel. The alarm should
cease after approximately one minute.
d) Depress and release the “Beacon Off” button to reset it.
Malfunctioning of the LOR Alarm does not prevent operation of the BioDisc System, but it
should be reported to your maintenance engineer for early rectification.
Setting a discharge duration of 12 months
Fig. 3

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 10
(9) PROCESS INITIATION
During installation, the unit will have been filled with water to prevent flotation in the concrete
surround. Allow sewage to enter the unit, this will gradually displace the clean water used
during installation.
The colonisation by micro-organisms will commence naturally and a operating biomass will
establish itself on the discs in 3-6 weeks, depending on individual site circumstances. This
will continue to develop, but note the development is chemical and temperature sensitive.
SECTION 4
OPERATION
(1) INTRODUCTION
The biological treatment process of your BioDisc is self regulating and it requires no
specialised operational knowledge, but it is important that you are aware of the following:
Your BioDisc system uses colonies of live natural micro-organisms (biomass), to break
down the pollutants in the sewage. Many chemicals used in households and commercial
establishments can inhibit or kill these micro-organisms; particularly if used in excessive
amounts.
Bear in mind that treatment plants serving small populations do not have the benefit of
dilution that occurs at a large sewage works. A bottle of bleach tipped down the toilet in
Birmingham would be virtually lost amongst the millions of gallons of sewage arriving at the
city's treatment works; a bottle of bleach in a plant serving a few houses could be a lethal
dose for the biomass.
If the biomass is damaged, it will usually recover in time. But in the meanwhile one of the
more obvious symptoms is an unpleasant smell, so it is in the operators interest to avoid
this.
Generally speaking all common household cleaning fluids are acceptable, provided they are
used in accordance with the makers instructions and stipulated concentrations. The
following “Do’s and Don’ts“ includes the most common household chemicals, but It is not an
exhaustive list and the golden rule is "If in doubt - leave it out."
Bear in mind too that it isn't only the toilet that is connected to the treatment plant; anything
that goes down the sink, bath etc. also ends up there.
(2) DO’S AND DON’TS
Washing machine and dishwasher detergents, washing up liquids:
These are generally all right to use in the normal concentrations and usage found in
domestic housing applications. BioDisc incorporates a unique flow management system
which enhances its ability to handle shock loads of detergent waste, but problems can
sometimes occur due to high laundry usage in commercial establishments such as hotels
and nursing homes. Each BioDisc is supplied on the basis of an individual assessment of
the sewage load, including laundry usage. Please contact Klargester before making any
changes that might increase sewage output or the proportion of laundry waste water.
Excessive use of Biological and enzyme containing detergents may affect the biomass.

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 11
Floor cleaners, disinfectants and bleaches:
These are safe to use in accordance with the makers recommendations and in the minimum
necessary concentration. Do not pour neat disinfectant or bleach down sinks or outside
gullies. If these are smelly it usually indicates a build up of decaying material or a plumbing
problem and should be dealt with accordingly.
Nappy disinfectants and bottle sterilising fluids E.g. Milton:
When disposing of the used fluid, ensure that it is well diluted with water. The easiest way
of doing this is usually to flush it away down the toilet.
Waste disposal units:
These do not inhibit the biomass, but, depending on use, they can present the treatment
plant with considerable extra load. This can result in the treatment process becoming
unbalanced, leading to problems. Much better to compost your vegetable peelings etc - it's
cheaper and environmentally friendly.
Home beer and wine making.
This presents a similar problem to waste disposal units. The BioDisc has to work as hard to
treat one pint of beer tipped down the drain as it does to treat all the normal waste produced
by one person in 24 hours. See also the notes above regarding sterilising fluids.
THE FOLLOWING MUST NOT BE DISCHARGED INTO THE DRAINS
Motor oil, grease, anti-freeze, brake fluid etc.
Cooking oil and fat.
Weed-killers, insecticides, fungicides and other gardening chemicals.
Paint, thinners, white spirit, turpentine, creosote etc.
Medicines
Take unused medicines to a pharmacist for safe disposal.
Chemical toilet waste.
Photographic developing fluids.
Nappies, sanitary towels, rags, soft toys, tennis balls etc.
This may seem obvious, but it is amazing what gets flushed down the loo from time to time.
Although such items are not directly damaging to the biomass they can cause problems, not
the least of which is simple blockage of the drains.
Even so-called disposable nappies and sanitary towels often do not degrade fully in the
treatment plant and can lead to malfunction, so it is best to dispose of them by other means.
(3) DE-SLUDGING AND MAINTENANCE
These are vital to the plant's ongoing operation and should be carried out in accordance
with the guidelines in the maintenance section of this manual.
Mechanical and electrical maintenance must be performed by properly trained engineers,
with reference to the appropriate maintenance guidelines. Klargester offer a range of
maintenance packages, details on request.

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 12
SECTION 5 MAINTENANCE
(1) INTRODUCTION
Klargester BioDiscs are designed and engineered for the minimum possible maintenance
requirements, consistent with proper performance. Nevertheless, it is important that routine
preventive electro/mechanical maintenance and de-sludging are carried out at the
appropriate intervals by suitably qualified persons.
Klargester offers planned contract maintenance and can be contacted on Aylesbury (01296)
633000 by telephone or by fax on [phone].
(2) CUSTOMER MAINTENANCE CHECKS
The following periodic checks may be carried out at approximately monthly Intervals.
•Visually check the general condition of the plant and listen for any unusual noises.
Report any aspects of concern to your maintenance engineer.
•Check the appearance of the Biomass. It should be light grey to brown at the first bank,
and may gradually changing to dark brown at the drive end of the rotor. If the growth is
excessively thick and the colour predominantly grey throughout, an overload condition
is indicated.
•Visually check that all fixings are secure.
•Clear any debris from inlet and outlet pipes.
•Check dosing buckets and transfer baffle for any build up of debris. Clean, if required,
using a stiff bristled brush.
•Check the Loss of Rotation Warning Device for correct operation (see Initial Start Up
Section). If the alarm does not operate properly, contact your maintenance engineer.
Your attention is specifically drawn to the Health and Safety section of this manual.
(3) AUTOMATIC RE-START AFTER POWER FAILURE
BioDiscs are designed to re-start automatically when power is resumed, but the re-start may
not succeed in some circumstances, such as extended power cuts.
When power is re-established, check that the rotor is turning correctly (see Section 3.0
paragraphs (6) and (7). In the event of any difficulties, contact Klargester.
(4) SLUDGE REMOVAL DESLUDGE VOLUMES
The volumes shown in the table are those anticipated when the plant is fully loaded. If the
system is not loaded to full capacity, the desludge period and volumes removed may be
adjusted, but it is essential that sludge is not allowed to accumulate to the detriment of the
process and that all settled sludge and floating matter are removed at each desludge visit.

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 13
Volumes in litres (gallons in brackets)
a) Isolate power to the BioDisc at the Control Panel.
b) Undo the BioDisc cover latches and fold back the hinged cover sections as required to
gain access. Alternatively the covers can be completely removed. Hinged sections
should be folded back before lifting off.
c) Remove surface scum from the Primary Settlement Tank through the desludge ports [A]
on either side of the rotor.
d) Lower the sewage level by approximately 500mm. Use the ports alternately
UNIT Desludge Primary
Settlement Tank Final Settlement Tank
Period Min Max. Min Max
BD/ND 6 months 4,000
(880) 5,230 (1,150) 1,500 (330) 2,260 (500)
BE/NE 4 months 3,350
(740) 5,050 (1,110) 1,500 (330) 2,260 (500)
BF/NF 4 months 5,650
(1,245) 8,150 (1,800) 2,000 (440) 2,950 (650)
BG/NG 3 months 7,100
(1,565) 10,610 (2,340) 1,000 (220) 2,260 (500)

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 14
e) Lift off the walkway covering the Final Settlement Tank [B], and remove settled sludge
and any floating matter. Replace the walkway. Some units have a sludge return pump
located in this chamber - if the pump is exposed during de-sludging it is important to refill
the chamber with water, sufficient to cover the pump, before switching on the unit.
f) Lower the hose into the bottom of the Primary Settlement Tank and remove settled
sludge. Use each port sequentially and cover all ports not in use. It may be necessary to
empty the tank completely to ensure full sludge removal. Replace all port covers.
g) DO NOT attempt to remove any liquid from the Rotor Section.
h) DO NOT attempt to clean off the gelatinous growth on the rotor.
i) Ensure that the BioDisc inlet and outlet pipes [C] and the Forward Feed Buckets [D] are
free of debris.
j) Ensure that the walkway and all desludge port covers are replaced, then close and lock
the BioDisc covers.
k) Re-connect the power supply. Ensure that the Control Panel door is locked shut.
l) Units with Loss of Rotation Alarms only: Wait for two minutes. If the alarm on the control
Panel does not activate, this indicates that the Rotor has successfully re-started. If the
alarm activates, switch off the power at the Control Panel and immediately switch on
again. If the alarm continues to activate, isolate the power supply and notify the plant
owner so that the problem can be investigated.
m) Units should be refilled with water.

GL0014K Owners Handbook BioDisc BD, BE, BF, BG, ND, NE, NF, NG
Page 15
TROUBLE SHOOTING GUIDE FOR BIODISC UNITS
SYMPTOM CAUSE ACTION
Strong odour Excessive build up of
sludge and scum Desludge the unit.
Grease (white/cream
crust in primary tank
and/or thick, smooth
biomass1)
De-sludge unit. If necessary hose off discs. Avoid
excessive use of fats and oils. Please note removal of
Biomass will reduce treatment until new Biomass
establishes.
Chemicals in the system
(very sparse or no
biomass1)
In most instances, units will recover naturally from toxic
inhibition events. See general guidance on use of domestic
chemicals.
Excessive laundry use
(thick, stringy whitish
biomass1on first section)
Spread out laundry operations. Avoid biological powders
where possible and use the minimum possible amounts of
detergent. .
Unit overloaded
(thick/grey biomass1) over
most of rotor
Check section for the process capability of the unit. If in
doubt, contact Klargester.
Rotor stopped See rotor stopped section below.
Drains inadequately
ventilated Check that there is an open high level vent at the head of the drains (not tile vent or “Durgo” valve).
Rotor stopped Switched off Check that the motor switch on the panel is in the “on”
position. Re-set if necessary.
Power failure Check the fuse/trip at the supply board. Replace/re-set as
necessary. If the problem persists, contact Klargester.
Wiring fault Have the wiring to control panel checked by a competent
electrician. If the supply wiring is OK contact Klargester.
Drive chain broken Contact Klargester.
Drive motor faulty Contact Klargester.
Loose pulleys on rotor or
gearbox output shaft Contact Klargester.
Rotor fails to re-
start after a
stoppage
Rotor unbalanced Consider Hosing off excess Biomass on the heavy side of
the rotor. Note removal of biomass reduces treatment.
Loss of rotation
alarm not
operational
Rotor Sensor out of
alignment with bracket Adjust one or both
Rotor turns
intermittently Drive motor overheating Contact Klargester.
See strong odour and rotor stopped sections.
Managed flow system
in-operative. Check that bucket(s) are in place and discharging correctly into the biozone second stage.
Sludge return pump
inoperative
(ND/NE/NF/NG only)
Contact Klargester.
Unit flooded Drain outlet blocked. Check drain downstream of unit , Check location, ? is unit
correctly installed and recessed
Effluent
discharge not
to required
standard